Put sheets on one stack and show an agent's facts in its sheet (#6958 )

* Put sheet tabs on the one sheet stack Sheets are one primitive with one stack. A sheet opened from any sheet stacks on top of it, and closing it uncovers the sheet underneath. The compact workspace's file and subagent sheets were an in-tree Gorhom BottomSheet with their own stacking, so a subagent chosen from the subagents list sheet replaced the list instead of covering it. - SheetHostScope: a subtree hosts the sheets presented inside it, so the sheet tabs draw inside the compact column and read the workspace providers while still joining the app-wide stack. Needs Gorhom's BottomSheetModalInternalProvider, which the patch exports. - IsolatedBottomSheetModal takes enableDismissOnClose; false keeps the content mounted through a close so the unsaved-changes guard can veto it. Its backdrop then closes the sheet rather than dismissing the top modal. The Gorhom patch also keeps a dismissing modal's status through its final onChange(-1), without which such a modal unmounting while presented never left the portal. - SheetTabs (was WorkspaceSheetHost) renders one IsolatedBottomSheetModal per store entry. The store never reorders sheets; a reveal of a covered sheet drops the unmodified sheets above it. - Subagent rows that open a sheet keep the list open (closeOnSelect false); rows that open a tab still close it. - A menu closes when its retained panel goes inactive, instead of hiding and reappearing with the panel on the next tab switch. Co-Authored-By: Claude <noreply@anthropic.com> * Show an agent's model and thinking in its sheet, and fit Open as tab in the header rail A Paseo agent shown in a sheet has no composer, so the facts the composer's model and thinking controls would show now sit in one line under the sheet header, the same row provider subagents already get from the daemon. The line resolves exactly as the controls do (resolveAgentModelSelection), from the session agent and the providers snapshot, and shows wherever the pane host is a sheet. Open as tab becomes the full-screen glyph beside Close, drawn by the shared SheetHeaderIconButton, so the title keeps its width. The tab switcher sheet is titled "Workspace tabs" so it reads as what it lists. Co-Authored-By: Claude <noreply@anthropic.com> * Show mode and context usage in the sheet facts line The line under a sheet's header now carries everything the composer's controls and context meter show: model, thinking, mode, and used/max context tokens with the share, each resolved as its control resolves it. Co-Authored-By: Claude <noreply@anthropic.com> * Re-render subagent rows when the workspace's tabs change A row decides at render time whether choosing it opens a sheet or reveals a tab, and keeps the list open only for a sheet. The hook behind it only subscribed to the layout mode, so a row rendered while its agent was a full tab kept closing the list after that tab was gone: on iOS, promoting a managed child, closing its tab, and reopening it from the list dropped the list under the sheet. Subscribe to the workspace's layout too. Co-Authored-By: Claude <noreply@anthropic.com> --------- Co-authored-by: Claude <noreply@anthropic.com>
Preserve renames in committed file diffs (#6895 )
2026-10-15 05:42:34 +00:00 · 2026-10-15 12:16:45 +07:00 · 2026-10-15 07:05:42 +02:00 · 2026-10-15 11:19:32 +07:00 · 2026-10-15 05:08:39 +02:00 · 2026-10-15 08:59:49 +07:00
417 changed files with 21593 additions and 3638 deletions
@@ -93,3 +93,6 @@ app.json

 # Heap snapshots dumped by --heapsnapshot-near-heap-limit; keep them for debugging.
 *.heapsnapshot
+
+# Project-local Serena configuration and memories.
+.serena/
@@ -252,7 +252,6 @@
        "packages/app/src/components/download-toast.tsx",
        "packages/app/src/components/draggable-list.native.tsx",
        "packages/app/src/components/headers/back-header.tsx",
-        "packages/app/src/components/headers/menu-header.tsx",
        "packages/app/src/components/headers/screen-header.tsx",
        "packages/app/src/components/host-status-dot.tsx",
        "packages/app/src/components/hosts/host-picker.tsx",
@@ -54,7 +54,7 @@ At the start of non-trivial work, list `docs/` and skim anything relevant to the
 | [docs/qa.md](docs/qa.md)                                             | QA evidence bar for pull requests — platform matrix, version drift, performance, UI proof                                      |
 | [docs/mobile-testing.md](docs/mobile-testing.md)                     | Maestro and mobile test workflows                                                                                              |
 | [docs/mobile-panels.md](docs/mobile-panels.md)                       | Compact left/center/right panel ownership, worklet motion, gesture revisions, and Fabric constraints                           |
-| [docs/explorer-sidebar.md](docs/explorer-sidebar.md)                 | Explorer sidebar and ordinary side-pane host contracts, lifecycle, placement, and routing preferences                          |
+| [docs/explorer-sidebar.md](docs/explorer-sidebar.md)                 | Explorer sidebar, side-pane, and compact workspace sheet host contracts, lifecycle, placement, routing preferences             |
 | [docs/ad-hoc-daemon-testing.md](docs/ad-hoc-daemon-testing.md)       | Isolated in-process daemon test harness                                                                                        |
 | [docs/browser-capture-harness.md](docs/browser-capture-harness.md)   | Real-Electron browser screenshot harness and compositor-surface gotcha                                                         |
 | [docs/android.md](docs/android.md)                                   | App variants, local/cloud builds, EAS workflows, version codes, F-Droid source builds and store metadata                       |
@@ -53,6 +53,17 @@
 - **クロスデバイス:** iOS、Android、デスクトップ、Web、CLI に対応。机で作業を始め、スマートフォンで確認し、ターミナルから自動化できます。
 - **プライバシー優先:** Paseo にはテレメトリー・トラッキング・強制ログインは一切ありません。

+## スポンサー
+
+<!-- Sponsors: one cell per sponsor in the order of packages/website/src/data/sponsors.ts, then "become a sponsor" cells up to three. -->
+<table>
+  <tr>
+    <td align="center" width="33%"><a href="https://hoplite.sh/?utm_source=paseo&utm_medium=readme&utm_campaign=sponsor"><picture><source media="(prefers-color-scheme: dark)" srcset="packages/website/public/sponsors/hoplite-on-dark.svg"><img src="packages/website/public/sponsors/hoplite-on-light.svg" alt="Hoplite" height="40"></picture></a><br><sub>Cloud coding agents</sub></td>
+    <td align="center" width="33%"><a href="https://paseo.sh/sponsor">Paseo のスポンサーになる</a></td>
+    <td align="center" width="33%"><a href="https://paseo.sh/sponsor">Paseo のスポンサーになる</a></td>
+  </tr>
+</table>
+
 ## はじめかた

 Paseo はコーディングエージェントを管理するローカルサーバー（デーモン）を起動します。デスクトップアプリ・モバイルアプリ・Web アプリ・CLI などのクライアントがこのデーモンに接続します。
@@ -151,11 +162,9 @@ npm run build:server
 npm run typecheck
 ```

-## スポンサー
+## Paseo を支援する

-Paseo は一人で開発しており、使ってくれる人たちの支援で成り立っています。[GitHub Sponsors](https://github.com/sponsors/boudra) で支援できます。企業として毎月[スポンサー](https://paseo.sh/sponsor#spot)になっていただくと、ロゴをここと paseo.sh のホームページに掲載します。
-
-<!-- Sponsor logos go here, in the same order as packages/website/src/data/sponsors.ts -->
+Paseo は一人で開発しており、使ってくれる人たちの支援で成り立っています。[GitHub Sponsors](https://github.com/sponsors/boudra) で支援できます。企業として毎月[スポンサー](https://paseo.sh/sponsor#spot)になっていただくと、ロゴをこの README の冒頭と、paseo.sh のトップページおよびドキュメントに掲載します。

 ## 関連プロジェクト

@@ -47,6 +47,17 @@
 - **여러 기기 지원:** iOS, Android, 데스크톱, 웹, CLI를 지원합니다. 데스크톱에서 시작해 휴대폰으로 확인하고 터미널에서 자동화할 수 있습니다.
 - **개인정보 보호 우선:** Paseo는 텔레메트리, 추적, 강제 로그인을 사용하지 않습니다.

+## 스폰서
+
+<!-- Sponsors: one cell per sponsor in the order of packages/website/src/data/sponsors.ts, then "become a sponsor" cells up to three. -->
+<table>
+  <tr>
+    <td align="center" width="33%"><a href="https://hoplite.sh/?utm_source=paseo&utm_medium=readme&utm_campaign=sponsor"><picture><source media="(prefers-color-scheme: dark)" srcset="packages/website/public/sponsors/hoplite-on-dark.svg"><img src="packages/website/public/sponsors/hoplite-on-light.svg" alt="Hoplite" height="40"></picture></a><br><sub>Cloud coding agents</sub></td>
+    <td align="center" width="33%"><a href="https://paseo.sh/sponsor">Paseo 스폰서 되기</a></td>
+    <td align="center" width="33%"><a href="https://paseo.sh/sponsor">Paseo 스폰서 되기</a></td>
+  </tr>
+</table>
+
 ## 시작하기

 Paseo는 코딩 에이전트를 관리하는 로컬 서버인 데몬을 실행합니다. 데스크톱 앱, 모바일 앱, 웹 앱, CLI 같은 클라이언트가 이 데몬에 연결합니다.
@@ -161,11 +172,9 @@ npm run build:server
 npm run typecheck
 ```

-## 스폰서
+## Paseo 후원하기

-Paseo는 한 사람이 개발하며, 사용하는 분들의 후원으로 운영됩니다. [GitHub Sponsors](https://github.com/sponsors/boudra)로 후원할 수 있습니다. 회사는 매월 [Paseo를 후원](https://paseo.sh/sponsor#spot)하고 로고를 이곳과 paseo.sh 홈페이지에 게재할 수 있습니다.
-
-<!-- Sponsor logos go here, in the same order as packages/website/src/data/sponsors.ts -->
+Paseo는 한 사람이 개발하며, 사용하는 분들의 후원으로 운영됩니다. [GitHub Sponsors](https://github.com/sponsors/boudra)로 후원할 수 있습니다. 회사는 매월 [Paseo를 후원](https://paseo.sh/sponsor#spot)하고 로고를 이 README 상단과 paseo.sh 홈페이지 및 문서에 게재할 수 있습니다.

 ## 관련 프로젝트

@@ -52,6 +52,17 @@ Paseo is an open source agentic development environment for desktop, mobile, web

 [Run parallel tasks in Paseo](https://paseo.sh/docs/parallel-development): start agents in separate worktrees, review their diffs, run each app, and check it in the built-in browser.

+## Sponsors
+
+<!-- Sponsors: one cell per sponsor in the order of packages/website/src/data/sponsors.ts, then "become a sponsor" cells up to three. -->
+<table>
+  <tr>
+    <td align="center" width="33%"><a href="https://hoplite.sh/?utm_source=paseo&utm_medium=readme&utm_campaign=sponsor"><picture><source media="(prefers-color-scheme: dark)" srcset="packages/website/public/sponsors/hoplite-on-dark.svg"><img src="packages/website/public/sponsors/hoplite-on-light.svg" alt="Hoplite" height="40"></picture></a><br><sub>Cloud coding agents</sub></td>
+    <td align="center" width="33%"><a href="https://paseo.sh/sponsor">Become a sponsor</a></td>
+    <td align="center" width="33%"><a href="https://paseo.sh/sponsor">Become a sponsor</a></td>
+  </tr>
+</table>
+
 ## Plugins

 Plugins run on the daemon and show up in every client you connect, with the same UI on desktop, web,
@@ -207,11 +218,9 @@ npm run build:server
 npm run typecheck
 ```

-## Sponsors
+## Support Paseo

-Paseo is an independent project used by tens of thousands of developers daily, built by one person and funded by the people who use it. Support the work on [GitHub Sponsors](https://github.com/sponsors/boudra). Companies can [sponsor Paseo](https://paseo.sh/sponsor#spot) monthly and have their logo shown here and on the paseo.sh homepage.
-
-<!-- Sponsor logos go here, in the same order as packages/website/src/data/sponsors.ts -->
+Paseo is an independent project used by tens of thousands of developers daily, built by one person and funded by the people who use it. Support the work on [GitHub Sponsors](https://github.com/sponsors/boudra). Companies can [sponsor Paseo](https://paseo.sh/sponsor#spot) monthly and have their logo shown at the top of this README and on the paseo.sh homepage and docs.

 ## Related projects

@@ -53,6 +53,17 @@
 - **跨设备：** 支持 iOS、Android、桌面端、Web 和 CLI。在桌前开始工作，用手机查看进度，也可以从终端脚本化操作。
 - **隐私优先：** Paseo 没有遥测、追踪，也不会强制登录。

+## 赞助商
+
+<!-- Sponsors: one cell per sponsor in the order of packages/website/src/data/sponsors.ts, then "become a sponsor" cells up to three. -->
+<table>
+  <tr>
+    <td align="center" width="33%"><a href="https://hoplite.sh/?utm_source=paseo&utm_medium=readme&utm_campaign=sponsor"><picture><source media="(prefers-color-scheme: dark)" srcset="packages/website/public/sponsors/hoplite-on-dark.svg"><img src="packages/website/public/sponsors/hoplite-on-light.svg" alt="Hoplite" height="40"></picture></a><br><sub>Cloud coding agents</sub></td>
+    <td align="center" width="33%"><a href="https://paseo.sh/sponsor">成为 Paseo 赞助商</a></td>
+    <td align="center" width="33%"><a href="https://paseo.sh/sponsor">成为 Paseo 赞助商</a></td>
+  </tr>
+</table>
+
 ## 快速开始

 Paseo 会运行一个名为 daemon 的本地服务，用来管理你的 coding agents。桌面 app、移动 app、Web app 和 CLI 等客户端都会连接到它。
@@ -151,11 +162,9 @@ npm run build:server
 npm run typecheck
 ```

-## 赞助
+## 支持 Paseo

-Paseo 由一个人开发，靠使用它的人来资助。你可以通过 [GitHub Sponsors](https://github.com/sponsors/boudra) 支持这项工作。公司也可以按月[赞助 Paseo](https://paseo.sh/sponsor#spot)，logo 会展示在这里和 paseo.sh 首页上。
-
-<!-- Sponsor logos go here, in the same order as packages/website/src/data/sponsors.ts -->
+Paseo 由一个人开发，靠使用它的人来资助。你可以通过 [GitHub Sponsors](https://github.com/sponsors/boudra) 支持这项工作。公司也可以按月[赞助 Paseo](https://paseo.sh/sponsor#spot)，logo 会展示在本 README 顶部，以及 paseo.sh 的首页和文档中。

 ## 相关项目

@@ -151,11 +151,12 @@ lifecycle queue. Resume chooses its history or interactive purpose from the dura
 entering that queue. Shutdown must finish before the manager releases runtime ownership; a failed
 close retains the runtime for cleanup and blocks replacement through that close operation.

-Authoritative timeline catch-up can use a runtime-only `history` resume purpose. For Codex, that
-purpose initializes a temporary app-server, reads the persisted thread and child histories, and
-releases the process before returning. It never loads, resumes, or unarchives a native thread,
-including legacy records whose native archive failed. The retained history session contains only
-the read results. Interactive resume remains responsible for repairing a provider session archived
+Authoritative timeline catch-up can use a runtime-only `history` resume purpose. The retained
+history session contains only the read results and must release its provider process once replay
+finishes. Codex reads the persisted thread and child histories on a temporary app-server and never
+loads, resumes, or unarchives a native thread, including legacy records whose native archive failed.
+ACP providers spawn the CLI, replay the session through `session/load`, and terminate the process
+before returning. Interactive resume remains responsible for repairing a provider session archived
 outside Paseo while its Paseo agent is active.

 Provider session connection owns every process it spawns until the session is registered with
@@ -211,7 +212,7 @@ parentAgentId === thisAgent.id  AND  !archivedAt

 - **Provider subagents** are child executions owned by Claude, Codex, or OpenCode. They are not inserted into `AgentManager` as managed agents. Providers emit a separate descriptor and timeline stream through `agent.provider_subagents.*`; the client keeps that state outside the normal agent store and merges only the presentation rows into the track. A descriptor's optional `parentSubagentId` identifies its direct provider-subagent parent; an absent value identifies a direct child of the managed agent.

-Clicking either kind opens a workspace tab. A Paseo subagent tab is a normal interactive agent pane. A provider subagent tab is a read-only timeline pane with no composer, archive, detach, rewind, or fork actions. It shows its own direct children in a subagents track. Both panes use `AgentStreamView`, so message, reasoning, tool-call, and layout rendering stay identical.
+Clicking either kind opens a workspace tab. On compact layouts it opens in a [sheet](explorer-sidebar.md#sheets) over the subagents list instead; the sheet hides the composer and shows the agent's model and thinking as one line in its place (`PaneSubtitle`, the row provider subagents already use), and a Paseo subagent's sheet offers **Open as tab** (the full-screen glyph in the header) to get the composer back. A Paseo subagent tab is a normal interactive agent pane. A provider subagent tab is a read-only timeline pane with no composer, archive, detach, rewind, or fork actions. It shows its own direct children in a subagents track. Both panes use `AgentStreamView`, so message, reasoning, tool-call, and layout rendering stay identical.

 Provider timelines use the same structural timeline item format but deliberately have a separate lifecycle and transport. A provider thread/session identifier is not a Paseo agent identifier, and closing its tab is always layout-only.

@@ -311,6 +311,22 @@ frames non-stop, pinning ProMotion displays at 120Hz forever and draining the
 battery while the app is idle — so do not re-add it. The probe's visibility
 guards already prevent throttling from causing a false stall.

+### Desktop Linux hidden-window fallback
+
+On Wayland (seen on ChromeOS Linux) a window created with `show: false` can sit
+forever without a single compositor frame: the renderer loads and runs, but
+`ready-to-show` never fires, so the window is never shown and the app looks like
+it did not start while every process is alive. `showWindowWhenReady`
+(`packages/desktop/src/window/show-when-ready.ts`) shows the main window when
+the document finishes loading if the event has not arrived. The fallback is
+Linux-only; macOS and Windows keep waiting for `ready-to-show`.
+
+Run the startup regression on Linux with an isolated display:
+
+```bash
+xvfb-run -a npm run test:e2e:window-startup --workspace=@getpaseo/desktop
+```
+
 ### Daemon logs

 Check `$PASEO_HOME/daemon.log` for daemon logs. The default level is `info`; set
@@ -7,6 +7,7 @@ contracts.
 | ---------------- | ---------------------------- | ------------------------------------------ |
 | Explorer sidebar | Files and Changes navigation | Cmd+E shows or hides the dedicated dock    |
 | Side pane        | Ordinary workspace content   | Created and closed like any workspace pane |
+| Sheets           | Compact look-ups             | One tab each, on the app-wide sheet stack  |

 ## Panel host contract

@@ -22,6 +23,36 @@ can move between Explorer and main panes.
 Keep panel implementations independent of either shell. `WorkspacePanelHost` owns mounting and
 retention, while each shell owns its tabs, focus, dragging, resizing, and shortcuts.

+## Sheets
+
+On compact layouts, files and subagents open in a sheet over the workspace, so the tab switcher
+keeps only agents and terminals. A panel kind opts in with `compactSheet` in its manifest
+(`packages/app/src/panels/panel-manifest.ts`), and the layout store's `openTab` decides between
+sheet and tab, so callers open targets the same way on every layout. Each such sheet holds one
+ordinary `WorkspaceTab` (`SheetTab` in the store) and is an `IsolatedBottomSheetModal` like every
+other sheet in the app, so it sits on the one app-wide stack: a sheet opened from any sheet, a
+subagent chosen from the subagents list included, lands on top of it, and closing the top sheet
+(drag, Close, backdrop, or Android Back) uncovers the one below. The list stays open under the
+sheet it opened; see [menus.md](menus.md#selecting-an-item-on-ios) for the row contract.
+
+The store keeps `sheetsByWorkspace` in opening order and never reorders it, because moving a sheet
+remounts its panel. Revealing a target that already has a sheet uncovers that sheet by closing the
+ones above it, except ones holding unsaved work, which stay where they are. Opening a sheet as a tab
+dismisses the sheets above it, since the tab would sit under them. The stack is not persisted.
+
+Sheets are modal and cover the whole compact column, header included. A sheet's header is its drag
+handle, because the panel scrolls on its own and content panning would fight it. Its trailing rail
+holds icon buttons only (`SheetHeaderIconButton`): Open as tab is the full-screen glyph beside
+Close, so the title keeps its width. The sheets present
+from inside the compact column's `SheetHostScope`, so their panels read the navigator and every
+workspace provider an ordinary pane has without a context bridge
+([floating-panels.md Gotcha 6](floating-panels.md#gotcha-6--bottom-sheet-refs-are-not-lifecycle-truth)).
+
+A sheet holding unsaved work is never implicitly displaced; only its guarded close removes it.
+Moving its tab to another host remounts the panel, and the file editor keeps unsaved text in the
+mounted view, so the move would drop it. Widening the layout is the known exception: it still moves
+the sheet's tab into a pane, and edits the autosave has not started writing are lost.
+
 ## Explorer sidebar

 `packages/app/src/workspace-tabs/explorer-sidebar.ts` owns show, hide, toggle, and view selection.
@@ -62,7 +93,9 @@ lifecycle.

 `packages/app/src/workspace-tabs/open-beside.ts` owns content opened beside the user's work. The
 layout store remembers one ordinary pane per workspace. The first side open creates a full-height
-right split around the workspace root; later side opens reuse it.
+right split around the workspace root; later side opens reuse it. Only the `split-panes` layout
+mode opens beside. Compact and single-pane layouts (touch tablets) open the same target in the main
+pane, so callers never check whether splits render.

 Removing a pane clears its remembered id; a later side open creates a new pane. The last visible
 ordinary pane stays when its final tab closes and shows the New launcher. An empty workspace does
@@ -198,6 +198,47 @@ viewport keeps the last keyboard reservation until the next opening replaces
 it, so a capped draft keeps one height through every keyboard transition
 instead of expanding on close and shrinking again on open.

+Fullscreen is a layout mode of the dock, not a second editor. `ComposerDock
+fullscreen` fills the stationary viewport with the composer slot over the
+still-mounted content, paints its own surface under the safe areas, and turns
+the surface translation off. The composer's single tree keeps the editing
+surface at the same position in both modes, so the mounted editor, its native
+buffer, selection, and focus survive the toggle and Send's clear always reaches
+the live input. The one remount left is a viewport crossing the compact
+breakpoint: the app shell swaps its gesture wrapper and the workspace screen
+mounts tabs in different trees, so every screen below remounts. The draft owner
+restores the text and the editing session restores the caret and focus intent.
+New workspace keys its sessions by draft in the app-level store for the same
+reason. The centered form honors fullscreen by style alone: no centering, no
+translation, setup fields hidden, slot filling the stationary viewport. The
+global exit action (Escape, hardware back) is registered only for the active
+composer: a retained tab keeps its fullscreen editor mounted while hidden, the
+sheet suspends pane focus, and the composer gives up input from the moment the
+user asks for the compact agent list or explorer, before the panel's motion
+settles. Pane focus itself stays put under those panels: the agent panel reads
+it as "the user is in this chat" for attention clearing, and opening the agent
+list must not clear the attention it shows. Focus restoration follows pane
+focus, not the active composer. The editor keeps its focus intent only across
+a blur that lands while its pane is not the user's (a retained tab hidden, a
+sheet over it) and refocuses when the pane comes back. A blur while the pane is
+theirs drops the intent in every layout mode, and the keyboard the compact
+panels dismiss when they settle is such a blur, so closing the agent list or
+explorer never reopens the keyboard. Keying restoration on the active composer
+made that dismiss look like a hidden-tab blur and refocused on close.
+The band beside the inline editor where the fullscreen glyph sits is the input's
+own right padding, so a tap anywhere in it focuses the editor whether or not the
+glyph shows. On web the slot is a fixed box over the visible viewport, which is
+also what lets a zoomed mobile page pan under it. Inside the slot, `ComposerFullscreenBody` reserves the keyboard
+height as a bottom margin at move start and end (boundary-time, like the
+capacity reservation) while `ComposerFullscreenFooter` rides the keyboard per
+frame with `KeyboardTranslateView`, so Send lands on the keyboard without a gap
+and without animating the editor's height. The screen that owns the chrome
+unmounts it: the workspace screen reads `useComposerTabFullscreen` for the
+active tab and New workspace reads the mounted composer's session. Hosts that
+render the dock pass the same `ComposerEditingSession` to the `Composer` so the
+dock, chrome, and editor agree on one fullscreen state. Escape (web overlay
+registration, focus untouched) and the Android back button leave fullscreen.
+
 Keep setup fields out of the composer's shrink chain. New workspace supplies its
 setup fields as the first dock child so they move up under the header as the draft
 grows. Putting the fields and composer in one bounded, shrinkable column made
@@ -302,9 +343,20 @@ Do not treat `onChange(-1)` as a close by itself. In a stacked
 another pushed sheet. Close React state from `onDismiss`; use `onChange` only to
 track phase.

-All sheets use the app-wide Gorhom modal provider through `IsolatedBottomSheetModal`. This
-includes native centered dialogs: separate React Native Modals cannot present a root-owned
-sibling dialog over an existing iOS presenter.
+All sheets use the app-wide Gorhom modal provider through `IsolatedBottomSheetModal`, with no
+exceptions: one stack means a sheet opened from any sheet lands on top of it and uncovers it on
+close. This includes native centered dialogs: separate React Native Modals cannot present a
+root-owned sibling dialog over an existing iOS presenter. A sheet that must draw inside a subtree
+(the [sheet tabs](explorer-sidebar.md#sheets) draw inside the compact workspace column so their
+panels read the workspace providers) presents from inside a `SheetHostScope`, which moves the
+portal host and container measurement while the sheet still joins the same stack. That export is
+what `patches/@gorhom+bottom-sheet+*.patch` adds.
+
+A sheet whose owner may veto the close (unsaved work) passes `enableDismissOnClose={false}`. Every
+close path then parks the sheet at index -1 with its content mounted; the owner hears
+`onChange(-1)`, runs its guard, and either snaps back to 0 or drops its state, which unmounts the
+sheet and takes it off the stack. Calling `dismiss()` on such a sheet bypasses the guard and
+unmounts it, so its backdrop and Back press call `close()`.

 The wrapper must give Gorhom an object ref. Gorhom accepts a callback ref at the React boundary
 but stores it in the modal queue and later reads `.current`; provider dismissal, replacement,
@@ -314,9 +366,10 @@ forwards commands to the current Gorhom handle.
 Request a backdrop with `backdropOpacity`; do not install a caller-owned backdrop. On web,
 Gorhom's default backdrop closes its own sheet, even when another modal is above it. Its animated
 pointer-event changes can expose a lower backdrop during a transition. The shared web backdrop
-keeps its press target until portal teardown and asks the provider to dismiss the top modal.
-Gorhom's presentation queue remains the authority; backdrop mount order is irrelevant. Native
-retains Gorhom's gesture backdrop and the same push/replace presentation semantics.
+keeps its press target until portal teardown and asks the provider to dismiss the top modal
+(a guarded sheet closes itself instead, see above). Gorhom's presentation queue remains the
+authority; backdrop mount order is irrelevant. Native retains Gorhom's gesture backdrop and the
+same push/replace presentation semantics.

 ## Gotcha 7 — A sheet cannot read context from its call site

@@ -21,6 +21,8 @@ Authoritative terminology. UI label wins. Don't invent synonyms; use what's here
 - **Repository / Remote** — Internal Git observations. They may produce mutable kind, branch, and project-grouping metadata but never the host-local project ID, root, display name, or workspace membership. No UI label.
 - **Sidebar items** — The configurable entries of the app sidebar, in two sections. Header: the rows at the head of the sidebar — New workspace, History, Search, Schedules, and plugin header items. Footer: the full-width rows between Add project and the footer icon row — Usage and plugin footer items. Add project and the icon row (Hosts, Help and support, Settings) are fixed and are not sidebar items. A plugin item may render several rows, such as one per bot; it is still one item that moves and hides as a block. Each section's order and visibility is one per-device preference (`AppSettings.sidebarNavItems`, `AppSettings.sidebarFooterItems`); every item may be off. UI: the Header and Footer cards on the Sidebar settings page. Code: `packages/app/src/sidebar-nav/model.ts` resolves a section, and the sidebar (`components/sidebar/sidebar-nav-rows.tsx`, the footer in `components/left-sidebar.tsx`) and the settings page (`screens/settings/sidebar/sidebar-nav-section.tsx`) read it through `useSidebarNavItems(section)`. Never hardcode one of these entries or add a second place that decides which ones show. Don't confuse with **Explorer sidebar**.
 - **Explorer sidebar** — The dedicated navigation dock containing the Files and Changes trees. UI: "Explorer sidebar". Code: `packages/app/src/workspace-tabs/explorer-sidebar.ts`; persisted pane identifiers retain the `explorer` spelling. See [explorer-sidebar.md](explorer-sidebar.md).
+- **Sheet** — Any bottom sheet; there is one kind and one app-wide stack, so a sheet opened from a sheet lands on top of it and closing it uncovers the one below. Code: `IsolatedBottomSheetModal` (`packages/app/src/components/ui/isolated-bottom-sheet-modal`). Forbidden: "Workspace sheet", "modal sheet" as a distinct kind. See [floating-panels.md](floating-panels.md).
+- **Sheet tab** — A compact-layout sheet holding one file or subagent tab over the workspace without adding it to the tab switcher. UI action: "Open as tab". Code: `SheetTab` and `sheetsByWorkspace` in `packages/app/src/stores/workspace-layout-store.ts`, `SheetTabs` (`packages/app/src/screens/workspace/sheet-tabs.tsx`). See [explorer-sidebar.md](explorer-sidebar.md#sheets).
 - **Side pane** — An ordinary right-side workspace pane used for content opened beside the user's work. It closes and participates in workspace splits like every other main-host pane. See [explorer-sidebar.md](explorer-sidebar.md#side-pane). Forbidden: "Side panel".
 - **Directory-backed surface** — A right-sidebar surface whose content is determined by the workspace's `cwd`, so two workspaces on the same directory see identical content: git diff/status, forge change-request info, file preview/explorer contents. Keyed by `(serverId, cwd)`, never `workspaceId`. See [architecture.md](architecture.md#right-sidebar-boundary-directory-backed-vs-workspace-owned).
 - **Workspace-owned state** — Per-workspace state that never leaks to a same-`cwd` sibling: tabs, agents, terminals, panes, title, plus review drafts, diff-mode overrides, composer attachments, and file-explorer open/expand state. Keyed by `workspaceId` (`cwd` only as a fallback for old payloads). See [architecture.md](architecture.md#right-sidebar-boundary-directory-backed-vs-workspace-owned).
@@ -52,6 +52,11 @@ is another, with its own icons and hover-revealed actions — but both hand the
 and take `closeOnSelect` to say whether choosing them ends the surface. A row that owns its press
 outright leaves the surface open behind whatever it opened, and skips the iOS wait.

+A row whose result opens a sheet passes `closeOnSelect={false}`: the sheet stacks over the menu
+sheet and uncovers it on close, so the menu is where the user lands next. A row that opens a tab
+closes, because the tab replaces the pane the menu belongs to. The subagents track asks the layout
+store which one a row is (`useSubagentOpensInSheet`), since the answer changes with the layout.
+
 ## Pages

 A submenu is a page, declared as data on the surface and reached by a `MenuSubTrigger` whose `id`
@@ -193,6 +198,9 @@ its own.
  backdrop, so there is exactly one `Modal` on native no matter how deep the menu goes.
 - **Sheet stacking and backdrop dismissal belong to `IsolatedBottomSheetModal`.** Menus only
  request a backdrop opacity. See [floating-panels.md](floating-panels.md#gotcha-6--bottom-sheet-refs-are-not-lifecycle-truth).
+- **A menu closes when its panel leaves the screen.** `MenuSurface` closes the menu when its
+  retained panel goes inactive. Hiding the surface alone leaves the open state behind, and the
+  menu would reappear with the panel on the next tab switch.
 - **Retained panels own visibility.** The shared menu surface unmounts when its panel becomes
  inactive. An async action can navigate before its menu closes; a hidden panel must not leave a
  portal backdrop blocking the destination. On web the chat suspends one commit after it goes
@@ -4,7 +4,7 @@ Paseo proxies HTTP traffic to services running inside your workspaces. Localhost

 ## How it works

-When a `paseo.json` script of `"type": "service"` starts, Paseo assigns it a local port and registers a route in the service proxy. Incoming requests whose `Host` header matches the script's generated hostname are forwarded to that port.
+When a `paseo.json` script of `"type": "service"` starts, Paseo assigns it a local port and registers a route in the service proxy. Incoming requests whose `Host` header matches the script's generated hostname are forwarded to that port. HTTP requests, WebSocket upgrades, and service health checks select the reachable IPv4 or IPv6 loopback address. Services can bind to `127.0.0.1` or `::1` without changing their proxy URL.

 The generated hostname is built from the script name, branch, and project:

@@ -86,6 +86,12 @@ buildNpmPackage {
    # Expo's web build pulls in some pre-bundled assets; ensure it doesn't try
    # to phone home during the build.
    CI = "1";
+    # Metro's worker runs out of heap transforming the generated
+    # ws-outbound.aot.js validator (about 12 MB). Node's default heap limit is
+    # 2 GB on machines with less than 15 GB of memory, such as GitHub's 7 GB
+    # macOS runners, and 4 GB above that. 4096 MB is that 4 GB ceiling, so this
+    # only raises the limit on smaller builders, like desktop-release.yml does.
+    NODE_OPTIONS = "--max-old-space-size=4096";
  };

  buildPhase = ''
@@ -223,6 +223,7 @@ test.describe("Add Project command-center flow", () => {

    await page.keyboard.press("Enter");
    await expectAddProjectPage(page, "directory-search");
+    await expect(addProjectFlowInput(page)).toBeFocused();
    await page.keyboard.type(projectPickerFixture.fuzzyQuery);
    await expect(addProjectFlow(page)).toContainText(projectPickerFixture.projectName, {
      timeout: 30_000,
@@ -16,6 +16,7 @@ import {
 } from "../support/helpers/assistant-images";
 import { expectAgentReadyToInterrupt } from "../support/helpers/agent-stream";
 import { seedWorkspace, type SeededWorkspace } from "../support/helpers/seed-client";
+import path from "node:path";

 const test = base.extend<{ imageWorkspace: SeededWorkspace }>({
  imageWorkspace: async ({ page: _page }, provide) => {
@@ -28,6 +29,42 @@ const test = base.extend<{ imageWorkspace: SeededWorkspace }>({
  },
 });

+test("assistant images at paths with spaces, Unicode and literal percent escapes render", async ({
+  imageWorkspace: workspace,
+  page,
+}) => {
+  test.setTimeout(120_000);
+  const image = await createSmallAssistantPng(workspace, {
+    alt: "Angle destination image",
+    fileName: "My image Мои.png",
+  });
+  const agent = await createSettledMockAgent(workspace, "Encoded image paths");
+  await emitSettledAssistantImage(workspace.client, agent, image, `<${image.relativePath}>`);
+  await openAssistantImageTimeline(page, agent);
+  await expectAssistantImageRendered(page, image);
+
+  const encodedImage = { ...image, alt: "Encoded destination image" };
+  await emitSettledAssistantImage(
+    workspace.client,
+    agent,
+    encodedImage,
+    encodeURI(path.join(workspace.repoPath, image.relativePath)),
+  );
+  await expectAssistantImageRendered(page, encodedImage);
+
+  const literalPercentImage = await createSmallAssistantPng(workspace, {
+    alt: "Literal percent filename image",
+    fileName: "literal%20name.png",
+  });
+  await emitSettledAssistantImage(
+    workspace.client,
+    agent,
+    literalPercentImage,
+    encodeURI(literalPercentImage.relativePath),
+  );
+  await expectAssistantImageRendered(page, literalPercentImage);
+});
+
 test("switching between settled agent tabs keeps a real assistant PNG rendered", async ({
  imageWorkspace: workspace,
  page,
@@ -0,0 +1,48 @@
+import { expect, test } from "../support/fixtures";
+import type { Page } from "@playwright/test";
+import { openSettingsSection } from "../support/helpers/settings";
+
+async function openAppearance(page: Page) {
+  await page.goto("/settings");
+  await openSettingsSection(page, "appearance");
+}
+
+async function setFontFamily(page: Page, name: string, family: string) {
+  const input = page.getByRole("textbox", { name });
+  await input.fill(family);
+  await input.press("Tab");
+}
+
+for (const name of ["Code font family", "Interface font family"]) {
+  test(`keeps settings usable after an unfinished quote in ${name}`, async ({ page }, testInfo) => {
+    await openAppearance(page);
+    await setFontFamily(page, name, "'Fira Code', monospace");
+    await expect(page.getByRole("textbox", { name })).toHaveValue("'Fira Code', monospace");
+
+    await setFontFamily(page, name, "'foo");
+    await expect(page.getByRole("textbox", { name })).toHaveValue("'Fira Code', monospace");
+    await expect(page.getByRole("button", { name: "Appearance", exact: true })).toBeInViewport();
+    await expect(page.getByText("Theme", { exact: true }).first()).toHaveCSS("font-size", "12px");
+
+    await page.screenshot({ path: testInfo.outputPath("rejected-font.png") });
+    await page.reload();
+    await expect(page.getByRole("textbox", { name })).toHaveValue("'Fira Code', monospace");
+    await expect(page.getByRole("button", { name: "Appearance", exact: true })).toBeInViewport();
+    await setFontFamily(page, name, "");
+    await expect(page.getByRole("textbox", { name })).toHaveValue("");
+  });
+}
+
+test("opens settings with defaults when a malformed font was already saved", async ({ page }) => {
+  await page.addInitScript(() => {
+    localStorage.setItem(
+      "@paseo:app-settings",
+      JSON.stringify({ monoFontFamily: "'foo", uiFontFamily: '"foo' }),
+    );
+  });
+  await openAppearance(page);
+  await expect(page.getByRole("textbox", { name: "Code font family" })).toHaveValue("");
+  await expect(page.getByRole("textbox", { name: "Interface font family" })).toHaveValue("");
+  await expect(page.getByRole("button", { name: "Appearance", exact: true })).toBeInViewport();
+  await expect(page.getByText("Theme", { exact: true }).first()).toHaveCSS("font-size", "12px");
+});
@@ -35,7 +35,7 @@ test("keeps the selected workspace visible in Light", async ({ page }, testInfo)
    await row.click();

    await expect(row).toHaveAttribute("aria-selected", "true");
-    await expect(row).toHaveCSS("background-color", "rgb(228, 228, 231)");
+    await expect(row).toHaveCSS("background-color", "rgb(212, 212, 216)");
    await page.screenshot({
      path: testInfo.outputPath("light-selected-workspace.png"),
      fullPage: true,
@@ -0,0 +1,122 @@
+import { appendFile } from "node:fs/promises";
+import path from "node:path";
+import type { Page } from "@playwright/test";
+import { test, expect } from "../support/fixtures";
+import { openChangesTreePanel } from "../support/helpers/workspace-tabs";
+
+function changesTree(page: Page) {
+  return page.getByTestId("changes-tree-panel").filter({ visible: true });
+}
+
+async function expectEmptyChanges(page: Page) {
+  await expect(changesTree(page).getByText("No changes to display", { exact: true })).toBeVisible();
+}
+
+async function editReadme(repoPath: string, text: string) {
+  await appendFile(path.join(repoPath, "README.md"), text);
+}
+
+async function expectReadmeChanges(page: Page, additions: number) {
+  await expect(changesTree(page).getByText("README.md", { exact: true })).toBeVisible({
+    timeout: 30_000,
+  });
+  await expect(changesTree(page)).toContainText(`+${additions}`);
+}
+
+async function openEmptyDiff(page: Page) {
+  await changesTree(page).getByTestId("changes-options-menu").click();
+  await page.getByTestId("changes-open-tab").click();
+  await expect(
+    page
+      .getByTestId("working-diff-panel")
+      .filter({ visible: true })
+      .getByText("No changes to display", { exact: true }),
+  ).toBeVisible();
+}
+
+async function expectReadmeDiff(page: Page, additions: number) {
+  await expect(
+    page.getByTestId("working-diff-panel").filter({ visible: true }).getByTestId("diff-file-0"),
+  ).toHaveAccessibleName(`README.md, +${additions}, -0`, { timeout: 30_000 });
+}
+
+async function openDiffFromNewTabMenu(page: Page) {
+  await page.getByTestId("workspace-new-tab-button").filter({ visible: true }).first().click();
+  await page.getByTestId("workspace-new-tab-menu-diff").filter({ visible: true }).first().click();
+  await expect(
+    page
+      .getByTestId("working-diff-panel")
+      .filter({ visible: true })
+      .getByText("No changes to display", { exact: true }),
+  ).toBeVisible();
+}
+
+async function refreshDiff(page: Page) {
+  await page
+    .getByTestId("working-diff-panel")
+    .filter({ visible: true })
+    .getByTestId("changes-refresh")
+    .click();
+}
+
+async function reloadWorkspace(page: Page) {
+  await page.reload();
+}
+
+test("Changes follows the first edit to a clean workspace without reloading", async ({
+  page,
+  withWorkspace,
+}) => {
+  const workspace = await withWorkspace();
+  await page.setViewportSize({ width: 1400, height: 900 });
+  await workspace.navigateTo();
+  await openChangesTreePanel(page);
+  await expectEmptyChanges(page);
+
+  await editReadme(workspace.repoPath, "first edit\n");
+  await expectReadmeChanges(page, 1);
+
+  await editReadme(workspace.repoPath, "second edit\n");
+  await expectReadmeChanges(page, 2);
+});
+
+test("the full diff follows the first edit to a clean workspace without reloading", async ({
+  page,
+  withWorkspace,
+}) => {
+  const workspace = await withWorkspace();
+  await page.setViewportSize({ width: 1400, height: 900 });
+  await workspace.navigateTo();
+  await openChangesTreePanel(page);
+  await expectEmptyChanges(page);
+  await openEmptyDiff(page);
+
+  await editReadme(workspace.repoPath, "first edit\n");
+  await expectReadmeDiff(page, 1);
+
+  await editReadme(workspace.repoPath, "second edit\n");
+  await expectReadmeDiff(page, 2);
+});
+
+test("a directly opened Diff tab follows the first edit without an active Changes tree", async ({
+  page,
+  withWorkspace,
+}) => {
+  const workspace = await withWorkspace();
+  await page.setViewportSize({ width: 1400, height: 900 });
+  await workspace.navigateTo();
+  await openDiffFromNewTabMenu(page);
+
+  await editReadme(workspace.repoPath, "first edit\n");
+  await expectReadmeDiff(page, 1);
+
+  await editReadme(workspace.repoPath, "second edit\n");
+  await expectReadmeDiff(page, 2);
+
+  await refreshDiff(page);
+  await expectReadmeDiff(page, 2);
+  await reloadWorkspace(page);
+  await expectReadmeDiff(page, 2);
+  await editReadme(workspace.repoPath, "third edit\n");
+  await expectReadmeDiff(page, 3);
+});
@@ -683,7 +683,7 @@ test("discarding a staged rename restores its source path", async ({ page }) =>

  const panel = page.getByTestId("working-diff-panel").filter({ visible: true });
  const renamedHeader = diffHeaderForPath(panel, "src/zz-renamed.ts");
-  await expect(renamedHeader).toHaveAccessibleName("src/zz-renamed.ts, +1, -0");
+  await expect(renamedHeader).toHaveAccessibleName("src/zz-renamed.ts, +0, -0");
  const renamedToggle = renamedHeader.getByTestId(/^diff-file-\d+-toggle$/);
  const toggleTestId = await renamedToggle.getAttribute("data-testid");
  expect(toggleTestId).not.toBeNull();
@@ -25,6 +25,12 @@ import {
  expectReadingStreamedMarkdown,
 } from "../support/helpers/chat-outline";
 import { createCreationScenario } from "../support/helpers/creation";
+import {
+  attachPromptTimelineEvidence,
+  expectPromptsDrawnByPlugin,
+  expectVirtualizedPluginPromptVisible,
+  withPromptTimelinePlugin,
+} from "../support/helpers/plugin-timeline";
 import {
  expectTimelineAtMaximumScrollWithPromptVisible,
  expectTimelinePromptNotMounted,
@@ -105,6 +111,60 @@ test.describe("desktop chat outline", () => {
    }
  });

+  test("jumps to prompts a timeline plugin draws", async ({ page }) => {
+    test.setTimeout(180_000);
+    const agent = await seedLongMockAgentTimeline({ turns: 80 });
+    try {
+      await withPromptTimelinePlugin(async () => {
+        await page.setViewportSize(WIDE_VIEWPORT);
+        await openAgentTimeline(page, agent);
+        await expectChatOutlinePrompts(page, 80);
+        await expectPromptsDrawnByPlugin(page);
+        await expectTimelinePromptNotMounted(page, agent.prompts[39]);
+
+        // Unloaded, then loaded, then near the newest edge.
+        await clickChatOutlineRowEdge(page, 40);
+        await expectTimelinePromptLandedBelowTop(page, agent.prompts[39]);
+        await attachPromptTimelineEvidence(page, test.info());
+        await clickChatOutlineRowEdge(page, 45);
+        await expectTimelinePromptLandedBelowTop(page, agent.prompts[44]);
+        await clickChatOutlineRowEdge(page, 78);
+        await expectTimelineAtMaximumScrollWithPromptVisible(page, agent.prompts[77]);
+        await expectPromptsDrawnByPlugin(page);
+      });
+    } finally {
+      await agent.cleanup();
+    }
+  });
+
+  test("jumps to a loaded virtualized prompt a timeline plugin draws without fetching", async ({
+    page,
+  }) => {
+    test.setTimeout(180_000);
+    const agent = await seedLongMockAgentTimeline({ turns: 80 });
+    const prompt = agent.prompts[29]!;
+    try {
+      await withPromptTimelinePlugin(async () => {
+        const history = await holdOlderHistoryPages(page, agent);
+        await page.setViewportSize(WIDE_VIEWPORT);
+        await openAgentTimeline(page, agent);
+        await expectChatOutlinePrompts(page, 80);
+        await scrollThroughOlderHistoryPages(page, 2, history);
+        await scrollTimelineToNewestLoadedEdge(page);
+        await expectTimelinePromptNotMounted(page, prompt);
+        const requestsBeforeJump = history.requestCount();
+
+        await clickChatOutlineRowEdge(page, 30);
+        await expectTimelinePromptLandedBelowTop(page, prompt);
+        await expectVirtualizedPluginPromptVisible(page, prompt);
+        await attachPromptTimelineEvidence(page, test.info());
+        expect(history.requestCount()).toBe(requestsBeforeJump);
+      }, [prompt]);
+    } finally {
+      await agent.cleanup();
+    }
+  });
+
  test.describe("with the whole conversation loaded", () => {
    let agent: LongTimelineAgent;

@@ -0,0 +1,96 @@
+import type { Page, TestInfo } from "@playwright/test";
+import { test, expect } from "../support/fixtures";
+import { seedWorkspace } from "../support/helpers/seed-client";
+import { openAgentRoute } from "../support/helpers/mock-agent";
+import { getServerId } from "../support/helpers/server-id";
+
+const labels = {
+  long: {
+    title: "workspace-with-a-very-long-release-and-investigation-name",
+    project: "project-with-a-very-long-customer-integration-name",
+  },
+  short: { title: "main", project: "Paseo" },
+};
+
+async function openNamedWorkspace(page: Page, names: typeof labels.long) {
+  const workspace = await seedWorkspace({ repoPrefix: "header-width-", title: names.title });
+  try {
+    await workspace.client.renameProject(workspace.projectId, names.project);
+    const agent = await workspace.client.createAgent({
+      provider: "mock",
+      cwd: workspace.repoPath,
+      workspaceId: workspace.workspaceId,
+      title: "Header layout check",
+      modeId: "load-test",
+      model: "e2e-fast-stream",
+    });
+    await openAgentRoute(page, { workspaceId: workspace.workspaceId, agentId: agent.id });
+    await expect(page.getByTestId("workspace-header-title")).toHaveText(names.title);
+    await expect(page.getByTestId("workspace-header-subtitle")).toHaveText(names.project);
+    await expect(
+      page.getByTestId(`host-badge-${getServerId()}`).filter({ visible: true }),
+    ).toHaveCount(1);
+    return workspace;
+  } catch (error) {
+    await workspace.cleanup();
+    throw error;
+  }
+}
+
+async function expectHeaderContentsFit(page: Page, info: TestInfo, long: boolean) {
+  const title = page.getByTestId("workspace-header-title");
+  const project = page.getByTestId("workspace-header-subtitle");
+  const badge = page.getByTestId(`host-badge-${getServerId()}`).filter({ visible: true });
+  const trigger = page.getByRole("button", { name: /Switch tabs/ });
+  const measure = async () => ({
+    title: await title.boundingBox(),
+    project: await project.boundingBox(),
+    badge: await badge.boundingBox(),
+    icon: await badge.locator("svg").boundingBox(),
+    trigger: await trigger.boundingBox(),
+    titleTruncated: await title.evaluate((el) => el.scrollWidth > el.clientWidth),
+    projectTruncated: await project.evaluate((el) => el.scrollWidth > el.clientWidth),
+  });
+  await page.screenshot({ path: info.outputPath("header.png") });
+  await expect(async () => {
+    const bounds = await measure();
+    expect(bounds.title).not.toBeNull();
+    expect(bounds.project).not.toBeNull();
+    expect(bounds.badge).not.toBeNull();
+    expect(bounds.icon).not.toBeNull();
+    expect(bounds.trigger).not.toBeNull();
+    // Approved geometry: 12px outside margin, 46px leading island, 8px title gap.
+    expect(bounds.title!.x).toBe(66);
+    expect(bounds.project!.x).toBe(bounds.title!.x);
+    expect(bounds.trigger!.width).toBe(32);
+    expect(bounds.trigger!.height).toBe(32);
+    // The action frame starts 7px inside its island; preserve the 8px gap before it.
+    const contentRight = bounds.trigger!.x - 15;
+    for (const box of [bounds.title!, bounds.project!, bounds.badge!, bounds.icon!]) {
+      expect(box.x + box.width).toBeLessThanOrEqual(contentRight + 1);
+    }
+    expect(bounds.project!.width).toBeGreaterThan(20);
+    expect(bounds.icon!.width).toBe(12);
+    expect(bounds.badge!.x).toBeGreaterThan(bounds.project!.x + bounds.project!.width);
+    expect(bounds.titleTruncated).toBe(long);
+    expect(bounds.projectTruncated).toBe(long);
+  }).toPass({ timeout: 5_000 });
+  await info.attach("header-bounds", {
+    body: JSON.stringify(await measure(), null, 2),
+    contentType: "application/json",
+  });
+}
+
+for (const width of [320, 390]) {
+  for (const kind of ["long", "short"] as const) {
+    test(`compact header contains ${kind} labels at ${width}px`, async ({ page }, info) => {
+      await page.setViewportSize({ width, height: 844 });
+      const workspace = await openNamedWorkspace(page, labels[kind]);
+      try {
+        await expectHeaderContentsFit(page, info, kind === "long");
+      } finally {
+        await workspace.cleanup();
+      }
+    });
+  }
+}
@@ -0,0 +1,154 @@
+import { readFile, writeFile } from "node:fs/promises";
+import path from "node:path";
+import { expect, test } from "../support/fixtures";
+import { expectComposerVisible } from "../support/helpers/composer";
+import { installDaemonWebSocketGate } from "../support/helpers/daemon-websocket-gate";
+import { openAgentRoute, seedMockAgentWorkspace } from "../support/helpers/mock-agent";
+import {
+  expectSubagentRowVisible,
+  openSubagentFromCompactTrack,
+  seedSubagent,
+} from "../support/helpers/subagents";
+import {
+  closeSheet,
+  expectOpenTabCount,
+  openSheetAsTab,
+  expectDeclinedDiscardPrompt,
+  expectSheetAtSnap,
+  replaceSheetFileText,
+  selectTabFromSwitcher,
+  sheet,
+  sheetHeader,
+  tapSheetBackdrop,
+} from "../support/helpers/sheet";
+
+const FILE_LINK = "linked.ts:3";
+
+function promptMentioning(target: string): string {
+  return [
+    "Generate a title and a git branch name for a coding agent from the user prompt and attachments.",
+    "Return JSON only with fields 'title' and 'branch'.",
+    "",
+    "<user-prompt>",
+    `Open \`${target}\` now`,
+    "</user-prompt>",
+  ].join("\n");
+}
+
+test("compact opens files and subagents in a sheet, leaving the tabs for agents", async ({
+  page,
+}) => {
+  await page.setViewportSize({ width: 390, height: 844 });
+  const workspace = await seedMockAgentWorkspace({
+    repoPrefix: "compact-workspace-sheet-",
+    title: "Sheet parent",
+    initialPrompt: promptMentioning(FILE_LINK),
+  });
+  try {
+    const gate = await installDaemonWebSocketGate(page);
+    const linkedPath = path.join(workspace.cwd, "linked.ts");
+    await writeFile(linkedPath, "one\ntwo\nthree\n", "utf8");
+    const child = await seedSubagent(
+      { client: workspace.client, repoPath: workspace.cwd, workspaceId: workspace.workspaceId },
+      { parentId: workspace.agentId, title: "Sheet child" },
+    );
+    await openAgentRoute(page, { workspaceId: workspace.workspaceId, agentId: workspace.agentId });
+    await expectOpenTabCount(page, 1);
+
+    await test.step("a chat file link opens the file in a sheet", async () => {
+      const fileLink = page.getByText(FILE_LINK, { exact: true });
+      await expect(fileLink).toBeVisible({ timeout: 15_000 });
+      await fileLink.click();
+
+      const fileSheet = sheet(page, "linked.ts");
+      await expect(fileSheet).toBeVisible();
+      await expect(fileSheet.getByText("three")).toBeVisible();
+      await expectSheetAtSnap(page, "linked.ts");
+      await expect(
+        sheetHeader(page, "linked.ts").getByRole("button", { name: "Open as tab" }),
+      ).toHaveCount(0);
+      await expectOpenTabCount(page, 1);
+      await closeSheet(page, "linked.ts");
+    });
+
+    await test.step("a subagent opens in a sheet over the subagents list", async () => {
+      await openSubagentFromCompactTrack(page, child.id);
+
+      const childSheet = sheet(page, child.title);
+      await expect(childSheet).toBeVisible();
+      await expectSheetAtSnap(page, child.title);
+      await expect(childSheet.getByRole("textbox", { name: "Message agent..." })).toHaveCount(0);
+      // The composer's model, thinking, and mode stand in for it, resolved the same way. An idle
+      // seeded agent has no context usage yet.
+      await expect(childSheet.getByTestId("agent-pane-subtitle")).toHaveText(
+        "Ten second stream · Low · Load test",
+      );
+      await expectOpenTabCount(page, 1);
+    });
+
+    await test.step("closing the subagent's sheet uncovers the list", async () => {
+      await closeSheet(page, child.title);
+      await expectSubagentRowVisible(page, child.id);
+    });
+
+    await test.step("Open as tab promotes the subagent to a full tab and ends the list", async () => {
+      await page.getByTestId(`subagents-track-row-${child.id}`).click();
+      await expectSheetAtSnap(page, child.title);
+      await openSheetAsTab(page, child.title);
+      await expect(page.getByTestId(`subagents-track-row-${child.id}`)).toHaveCount(0);
+      await expectOpenTabCount(page, 2);
+      await expectComposerVisible(page);
+    });
+
+    await test.step("the list the subagent was opened from closed with its tab", async () => {
+      await selectTabFromSwitcher(page, "Sheet parent");
+      await expect(page.getByTestId(`subagents-track-row-${child.id}`)).toHaveCount(0);
+    });
+
+    await test.step("once its tab closes, the subagent reopens in a sheet that keeps the list", async () => {
+      await page
+        .getByRole("button", { name: /Switch tabs/ })
+        .filter({ visible: true })
+        .click();
+      await expect(page.getByText("Workspace tabs", { exact: true })).toBeVisible();
+      const menuBase = `workspace-tab-menu-agent_${child.id}`;
+      await page.getByTestId(`${menuBase}-trigger`).click();
+      await page.getByTestId(`${menuBase}-close`).click();
+      await expectOpenTabCount(page, 1);
+      // Closing a tab keeps the switcher open, with the parent as the tab left. Its backdrop is
+      // tapped once the row menu's own sheet has gone.
+      await expect(page.getByRole("button", { name: "Bottom sheet backdrop" })).toHaveCount(1);
+      await tapSheetBackdrop(page);
+      await expect(page.getByRole("button", { name: "Bottom sheet backdrop" })).toHaveCount(0);
+
+      await openSubagentFromCompactTrack(page, child.id);
+      await expectSheetAtSnap(page, child.title);
+      await closeSheet(page, child.title);
+      await expectSubagentRowVisible(page, child.id);
+      await tapSheetBackdrop(page);
+      await expect(page.getByRole("button", { name: "Bottom sheet backdrop" })).toHaveCount(0);
+    });
+
+    await test.step("a sheet with unsaved edits closes only through the guarded close", async () => {
+      await page.getByText(FILE_LINK, { exact: true }).click();
+      const fileSheet = sheet(page, "linked.ts");
+      await expect(fileSheet).toBeVisible();
+      // Hold the autosave so the edit stays unsaved.
+      gate.holdNextClientRequest("fs.file.write.request");
+      await replaceSheetFileText(page, "linked.ts", "edited in the sheet");
+      await gate.waitForHeldClientRequest();
+
+      await expectDeclinedDiscardPrompt(page, () => tapSheetBackdrop(page));
+      await expect(fileSheet.locator(".cm-content")).toHaveText("edited in the sheet");
+      await expectDeclinedDiscardPrompt(page, () =>
+        sheetHeader(page, "linked.ts").getByRole("button", { name: "Close" }).click(),
+      );
+      await expect(fileSheet.locator(".cm-content")).toHaveText("edited in the sheet");
+
+      gate.releaseHeldClientRequest();
+      await expect.poll(() => readFile(linkedPath, "utf8")).toBe("edited in the sheet");
+    });
+  } finally {
+    await workspace.cleanup();
+  }
+});
@@ -9,7 +9,12 @@ import { expectWorkspaceTabVisible, openSessions } from "../support/helpers/arch
 import { daemonWsRoutePattern } from "../support/helpers/daemon-port";
 import { getServerId } from "../support/helpers/server-id";
 import { switchWorkspaceViaSidebar } from "../support/helpers/workspace-ui";
-import { expectMobileAgentSidebarVisible } from "../support/helpers/sidebar";
+import {
+  closeMobileAgentSidebar,
+  expectMobileAgentSidebarHidden,
+  expectMobileAgentSidebarVisible,
+  openMobileAgentSidebar,
+} from "../support/helpers/sidebar";
 import { expectNewWorkspaceProjectSelected } from "../support/helpers/new-workspace";

 const TEST_COMMANDS = [
@@ -96,16 +101,6 @@ interface PopoverFrameRecorderWindow extends Window {
  __stopComposerAutocompleteFrameRecorder?: () => void;
 }

-async function getTopTestIdAtPoint(page: Page, x: number, y: number) {
-  return page.evaluate(
-    ([pointX, pointY]) => {
-      const element = document.elementFromPoint(pointX, pointY);
-      return element?.closest("[data-testid]")?.getAttribute("data-testid") ?? null;
-    },
-    [x, y],
-  );
-}
-
 async function installListCommandsStub(page: Page): Promise<void> {
  await page.routeWebSocket(daemonWsRoutePattern(), (ws) => {
    const server = ws.connectToServer();
@@ -701,19 +696,15 @@ test.describe("Composer autocomplete", () => {
          timeout: 30_000,
        });

-        await page.getByRole("button", { name: "Open menu" }).click();
+        // The sidebar covers the composer, so the composer gives up its popover while the
+        // sidebar is open and brings it back once the sidebar closes.
+        await openMobileAgentSidebar(page);
        await expectMobileAgentSidebarVisible(page);
+        await expect(popover).toHaveCount(0);

-        const popoverBox = await popover.boundingBox();
-        expect(popoverBox).not.toBeNull();
-
-        const topTestId = await getTopTestIdAtPoint(
-          page,
-          popoverBox!.x + popoverBox!.width / 2,
-          popoverBox!.y + popoverBox!.height / 2,
-        );
-
-        expect(topTestId).not.toBe("composer-autocomplete-popover");
+        await closeMobileAgentSidebar(page);
+        await expectMobileAgentSidebarHidden(page);
+        await expect(popover.getByText("/help", { exact: true }).first()).toBeVisible();
      } finally {
        await agent.cleanup();
      }
@@ -0,0 +1,104 @@
+import { expect, test, type Page } from "../support/fixtures";
+import {
+  composerLocator,
+  expectComposerDraft,
+  expectComposerVisible,
+  fillComposerDraft,
+  enterComposerFullscreen,
+  exitComposerFullscreen,
+  resizeComposerViewport,
+  selectComposerDraftRange,
+} from "../support/helpers/composer";
+import { openAgentRoute, seedMockAgentWorkspace } from "../support/helpers/mock-agent";
+
+// The popover has no semantic role; its rows are React Native Pressables.
+function fileSuggestions(page: Page) {
+  return page.getByTestId("composer-autocomplete-popover");
+}
+
+async function selectReadmeMention(page: Page): Promise<void> {
+  await fillComposerDraft(page, "@README");
+  await expect(fileSuggestions(page).getByText("README.md", { exact: true })).toBeVisible();
+  await expect(fileSuggestions(page).getByText("example.com", { exact: true })).toHaveCount(0);
+  await composerLocator(page).press("Enter");
+  await expectComposerDraft(page, '"README.md"');
+}
+
+async function sendEmailIntact(page: Page, email: string): Promise<void> {
+  await fillComposerDraft(page, email);
+  await expect(fileSuggestions(page)).not.toBeVisible();
+  await composerLocator(page).press("Enter");
+  await expectComposerDraft(page, "");
+  await expect(page.getByText(email, { exact: true })).toBeVisible();
+}
+
+for (const email of [
+  "user <12345+user@noreply.example.com>",
+  "alice@example.com",
+  "noreply+@example.com",
+]) {
+  test(`Enter sends ${email} intact and still completes file mentions`, async ({ page }) => {
+    const agent = await seedMockAgentWorkspace({
+      repoPrefix: "composer-email-",
+      title: "Email mention regression",
+      repo: { files: [{ path: "example.com", content: "A file matching the email domain.\n" }] },
+    });
+    try {
+      await openAgentRoute(page, agent);
+      await expectComposerVisible(page);
+      await test.step("complete a workspace file mention with Enter", async () => {
+        await selectReadmeMention(page);
+      });
+      await test.step("send an email without offering or inserting workspace files", async () => {
+        await sendEmailIntact(page, email);
+      });
+    } finally {
+      await agent.cleanup();
+    }
+  });
+}
+
+test("fullscreen mention keys edit the draft while inline keys still complete files", async ({
+  page,
+}) => {
+  const agent = await seedMockAgentWorkspace({
+    repoPrefix: "composer-fullscreen-mention-",
+    title: "Fullscreen mention keys",
+  });
+  try {
+    await resizeComposerViewport(page, "portrait");
+    await openAgentRoute(page, agent);
+    await expectComposerVisible(page);
+    const draft = "First line\nSecond line\n@README";
+    await fillComposerDraft(page, draft);
+    await expect(fileSuggestions(page).getByText("README.md", { exact: true })).toBeVisible();
+    await enterComposerFullscreen(page);
+    await expect(fileSuggestions(page)).not.toBeVisible();
+    await selectComposerDraftRange(page, draft.length, draft.length);
+    await composerLocator(page).press("ArrowUp");
+    await expect
+      .poll(() =>
+        composerLocator(page).evaluate((element) => {
+          const input = element as HTMLTextAreaElement;
+          return input.selectionStart === input.selectionEnd && input.selectionStart < 23;
+        }),
+      )
+      .toBe(true);
+    await selectComposerDraftRange(page, draft.length, draft.length);
+    await composerLocator(page).press("Enter");
+    await expectComposerDraft(page, `${draft}\n`);
+    await exitComposerFullscreen(page);
+    await selectReadmeMention(page);
+    const commandDraft = "/cl\nSecond line\nThird line";
+    await fillComposerDraft(page, commandDraft);
+    await selectComposerDraftRange(page, 2, 2);
+    await composerLocator(page).press("ArrowRight");
+    await expect(fileSuggestions(page).getByText("/clear", { exact: true }).first()).toBeVisible();
+    await enterComposerFullscreen(page);
+    await expect(fileSuggestions(page)).not.toBeVisible();
+    await composerLocator(page).press("Enter");
+    await expectComposerDraft(page, "/cl\n\nSecond line\nThird line");
+  } finally {
+    await agent.cleanup();
+  }
+});
@@ -1,13 +1,30 @@
 import { expect, test, type Page } from "../support/fixtures";
 import {
+  composerLocator,
+  blurComposerInput,
+  enterComposerFullscreen,
+  exitComposerFullscreen,
  expectComposerDraft,
  expectComposerFocused,
+  expectComposerFullscreenControls,
  expectComposerNotFocused,
  expectComposerVisible,
+  expectWorkspaceHeaderVisible,
+  resizeComposerViewport,
  submitMessage,
  typeIntoFocusedComposer,
 } from "../support/helpers/composer";
 import { openAgentRoute, seedMockAgentWorkspace } from "../support/helpers/mock-agent";
+import {
+  closeMobileAgentSidebar,
+  closeMobileExplorer,
+  expectMobileAgentSidebarHidden,
+  expectMobileAgentSidebarVisible,
+  expectMobileExplorerHidden,
+  expectMobileExplorerVisible,
+  swipeOpenMobileAgentSidebar,
+  swipeOpenMobileExplorer,
+} from "../support/helpers/sidebar";

 test("submitting a message leaves the composer ready for the next message", async ({ page }) => {
  const agent = await seedMockAgentWorkspace({
@@ -76,3 +93,76 @@ test.describe("touch screen wide enough for the desktop layout", () => {
    }
  });
 });
+
+const COMPACT_PANELS = [
+  {
+    name: "agent list",
+    open: swipeOpenMobileAgentSidebar,
+    expectOpen: expectMobileAgentSidebarVisible,
+    close: closeMobileAgentSidebar,
+    expectClosed: expectMobileAgentSidebarHidden,
+  },
+  {
+    name: "Explorer",
+    open: swipeOpenMobileExplorer,
+    expectOpen: expectMobileExplorerVisible,
+    close: closeMobileExplorer,
+    expectClosed: expectMobileExplorerHidden,
+  },
+] as const;
+
+for (const panel of COMPACT_PANELS) {
+  test(`closing the compact ${panel.name} does not restore composer focus`, async ({ page }) => {
+    const agent = await seedMockAgentWorkspace({
+      repoPrefix: "composer-focus-panel-",
+      title: `Composer focus under ${panel.name}`,
+    });
+    const draft = "Line one\nLine two\nLine three";
+    try {
+      await resizeComposerViewport(page, "portrait");
+      await openAgentRoute(page, agent);
+      await expectComposerVisible(page);
+
+      await test.step("an untouched editor stays untouched", async () => {
+        await expectComposerNotFocused(page);
+        await panel.open(page);
+        await panel.expectOpen(page);
+        await panel.close(page);
+        await panel.expectClosed(page);
+        await expectComposerNotFocused(page);
+      });
+
+      await test.step("an inline editor blurred under the panel stays blurred", async () => {
+        await composerLocator(page).fill(draft);
+        await composerLocator(page).click();
+        await expectComposerFocused(page);
+        await panel.open(page);
+        await panel.expectOpen(page);
+        await blurComposerInput(page);
+        await panel.close(page);
+        await panel.expectClosed(page);
+        await expectComposerNotFocused(page);
+        await expectComposerDraft(page, draft);
+      });
+
+      await test.step("a fullscreen editor blurred under the panel stays blurred", async () => {
+        await composerLocator(page).click();
+        await enterComposerFullscreen(page);
+        await expectComposerFullscreenControls(page);
+        await expectComposerFocused(page);
+        await panel.open(page);
+        await panel.expectOpen(page);
+        await blurComposerInput(page);
+        await panel.close(page);
+        await panel.expectClosed(page);
+        await expectComposerNotFocused(page);
+        await expectComposerFullscreenControls(page);
+        await expectComposerDraft(page, draft);
+        await exitComposerFullscreen(page);
+        await expectWorkspaceHeaderVisible(page);
+      });
+    } finally {
+      await agent.cleanup();
+    }
+  });
+}
@@ -1,3 +1,5 @@
+import { createMockIdleAgent, openWorkspaceWithAgents } from "../support/helpers/archive-tab";
+import { seedWorkspace } from "../support/helpers/seed-client";
 import { expect, test, type Page } from "../support/fixtures";
 import {
  expectNearBottom,
@@ -5,8 +7,38 @@ import {
  waitForScrollableChat,
 } from "../support/helpers/agent-bottom-anchor";
 import { awaitAssistantMessage } from "../support/helpers/agent-stream";
-import { composerLocator, expectComposerVisible } from "../support/helpers/composer";
+import {
+  attachComposerTestImage,
+  pasteComposerTestImage,
+  enterComposerFullscreen,
+  exitComposerFullscreen,
+  resizeComposerViewport,
+  selectComposerDraftRange,
+  expectComposerDraftSelection,
+  expectComposerFullscreenControls,
+  sendComposerWithButton,
+  queueComposerWithButton,
+  configureComposerQueueSend,
+  activateRetainedComposerTab,
+  switchComposerTabWithKeyboard,
+  expectWorkspaceHeaderHidden,
+  expectWorkspaceHeaderVisible,
+  recordVisibleComposerGeometry,
+  expectNoCollapsedVisibleComposer,
+  expectAttachmentPill,
+  expectQueuedMessageButton,
+  startRunningMockAgent,
+  composerLocator,
+  expectComposerVisible,
+  expectComposerFullscreenFitsVisibleViewport,
+} from "../support/helpers/composer";
 import { openAgentRoute, seedMockAgentWorkspace } from "../support/helpers/mock-agent";
+import {
+  closeMobileAgentSidebar,
+  expectMobileAgentSidebarHidden,
+  expectMobileAgentSidebarVisible,
+  swipeOpenMobileAgentSidebar,
+} from "../support/helpers/sidebar";

 async function composerHeight(page: Page): Promise<number> {
  return composerLocator(page).evaluate((element) => element.getBoundingClientRect().height);
@@ -133,3 +165,469 @@ test("composer growth keeps a bottom-pinned chat at the bottom", async ({ page }
    await agent.cleanup();
  }
 });
+
+/** Freeze the page's timers and animation frames until `page.clock.resume()`. */
+async function pausePageClock(page: Page): Promise<void> {
+  const now = Date.now();
+  await page.clock.install({ time: now });
+  await page.clock.pauseAt(now);
+}
+
+/** The send error shares the footer with Send, so whatever keeps Send visible keeps it visible. */
+async function expectFullscreenErrorAboveSend(page: Page): Promise<void> {
+  const frame = page.getByTestId("composer-fullscreen");
+  const alertBox = (await frame.getByRole("alert").boundingBox())!;
+  const sendBox = (await page
+    .getByRole("button", { name: "Send message", exact: true })
+    .boundingBox())!;
+  const editorBox = (await composerLocator(page).boundingBox())!;
+  expect(alertBox.y).toBeGreaterThanOrEqual(editorBox.y + editorBox.height);
+  expect(alertBox.y + alertBox.height).toBeLessThanOrEqual(sendBox.y);
+}
+
+async function writeCompactDraft(page: Page, text: string): Promise<void> {
+  await composerLocator(page).fill(text);
+  await expect(composerLocator(page)).toHaveValue(text);
+}
+
+test("compact long drafts stop growing before the header", async ({ page }) => {
+  const agent = await seedMockAgentWorkspace({
+    repoPrefix: "composer-cap-",
+    title: "Composer cap",
+  });
+  try {
+    await resizeComposerViewport(page, "portrait");
+    await openAgentRoute(page, agent);
+    await expectComposerVisible(page);
+    await writeCompactDraft(page, "A long draft line\n".repeat(40));
+    await expect.poll(() => composerHeight(page)).toBeLessThanOrEqual(160);
+  } finally {
+    await agent.cleanup();
+  }
+});
+
+test("compact fullscreen editing preserves the live draft and selection and stays open after send", async ({
+  page,
+}) => {
+  const agent = await seedMockAgentWorkspace({
+    repoPrefix: "composer-fullscreen-",
+    title: "Fullscreen composer",
+  });
+  try {
+    await resizeComposerViewport(page, "portrait");
+    await openAgentRoute(page, agent);
+    await expectComposerVisible(page);
+    await test.step("the affordance appears after two rendered lines, including soft wraps", async () => {
+      await attachComposerTestImage(page);
+      await expectAttachmentPill(page, "composer-image-attachment-pill");
+      await writeCompactDraft(page, "First line\nSecond line");
+      await expect(page.getByRole("button", { name: "Fullscreen", exact: true })).toHaveCount(0);
+      await writeCompactDraft(page, "First line\nSecond line\nThird line");
+      await expect(page.getByRole("button", { name: "Fullscreen", exact: true })).toBeVisible();
+      await writeCompactDraft(
+        page,
+        "A sentence with enough words to wrap across several rendered lines in a narrow input. ".repeat(
+          4,
+        ),
+      );
+      await expect(page.getByRole("button", { name: "Fullscreen", exact: true })).toBeVisible();
+    });
+    await test.step("fullscreen covers the header and keeps the live draft and selection", async () => {
+      await selectComposerDraftRange(page, 4, 17);
+      await enterComposerFullscreen(page);
+      await expectComposerFullscreenControls(page);
+      await expectWorkspaceHeaderHidden(page);
+      await expectComposerDraftSelection(page, 4, 17);
+      await expect(page.getByTestId("composer-image-attachment-pill")).toHaveCount(0);
+      await writeCompactDraft(page, "Edited fullscreen draft\nSecond line\nThird line");
+      await selectComposerDraftRange(page, 3, 12);
+    });
+    await test.step("exit restores the inline composer with the fullscreen edits", async () => {
+      await exitComposerFullscreen(page);
+      await expectWorkspaceHeaderVisible(page);
+      await expect(composerLocator(page)).toHaveValue(
+        "Edited fullscreen draft\nSecond line\nThird line",
+      );
+      await expectComposerDraftSelection(page, 3, 12);
+      await expectAttachmentPill(page, "composer-image-attachment-pill");
+      await expect(composerLocator(page)).toBeFocused();
+    });
+    await test.step("sending inline after a fullscreen edit clears the visible editor", async () => {
+      await sendComposerWithButton(page);
+      await expect(composerLocator(page)).toHaveValue("");
+      await expect(page.getByTestId("composer-image-attachment-pill")).toHaveCount(0);
+      await writeCompactDraft(page, "Typed after the fullscreen cycle");
+      await sendComposerWithButton(page);
+      await expect(composerLocator(page)).toHaveValue("");
+    });
+    await test.step("sending inside fullscreen clears the editor and keeps fullscreen open", async () => {
+      await writeCompactDraft(page, "First line\nSecond line\nThird line");
+      await enterComposerFullscreen(page);
+      await writeCompactDraft(page, "Short draft");
+      await expectComposerFullscreenControls(page);
+      await selectComposerDraftRange(page, 0, 5);
+      await resizeComposerViewport(page, "landscape");
+      await expectComposerFullscreenControls(page);
+      await expectComposerDraftSelection(page, 0, 5);
+      await expect(composerLocator(page)).toHaveValue("Short draft");
+      await expect(composerLocator(page)).toBeFocused();
+      await resizeComposerViewport(page, "portrait");
+      await sendComposerWithButton(page);
+      await expect(composerLocator(page)).toHaveValue("");
+      await expectComposerFullscreenControls(page);
+      await expect(page.getByRole("button", { name: "Send message", exact: true })).toBeDisabled();
+    });
+    await test.step("typing and sending keep working after leaving fullscreen again", async () => {
+      await writeCompactDraft(page, "Typed inside fullscreen");
+      await expect(page.getByRole("button", { name: "Send message", exact: true })).toBeEnabled();
+      await exitComposerFullscreen(page);
+      await expectWorkspaceHeaderVisible(page);
+      await expect(composerLocator(page)).toHaveValue("Typed inside fullscreen");
+      await writeCompactDraft(page, "Typed inside fullscreen, finished inline");
+      await sendComposerWithButton(page);
+      await expect(composerLocator(page)).toHaveValue("");
+      await writeCompactDraft(page, "One more inline message");
+      await sendComposerWithButton(page);
+      await expect(composerLocator(page)).toHaveValue("");
+    });
+  } finally {
+    await agent.cleanup();
+  }
+});
+
+test("a caret inside an unpublished edit survives a breakpoint remount", async ({ page }) => {
+  const agent = await seedMockAgentWorkspace({
+    repoPrefix: "composer-remount-caret-",
+    title: "Remount caret",
+  });
+  try {
+    await resizeComposerViewport(page, "portrait");
+    await openAgentRoute(page, agent);
+    await expectComposerVisible(page);
+    await writeCompactDraft(page, "Short draft");
+    await selectComposerDraftRange(page, 5, 5);
+    // The draft owner publishes web edits after the next paint. A rotation inside that
+    // window remounts the editor before the edit has reached the draft store; the paused
+    // clock holds the page there instead of racing the frame.
+    await pausePageClock(page);
+    await composerLocator(page).press("X");
+    await resizeComposerViewport(page, "landscape");
+    await page.clock.resume();
+    await expect(composerLocator(page)).toHaveValue("ShortX draft");
+    await expectComposerDraftSelection(page, 6, 6);
+    await expect(composerLocator(page)).toBeFocused();
+    await composerLocator(page).press("Y");
+    await expect(composerLocator(page)).toHaveValue("ShortXY draft");
+  } finally {
+    await agent.cleanup();
+  }
+});
+
+test("fullscreen submit rejection retains the editable draft and supports retry", async ({
+  page,
+}) => {
+  const agent = await seedMockAgentWorkspace({
+    repoPrefix: "composer-fullscreen-retry-",
+    title: "Fullscreen retry",
+    featureValues: { mockPromptRejections: 1 },
+  });
+  const draft = "First line\nSecond line\nThird line";
+  try {
+    await resizeComposerViewport(page, "portrait");
+    await openAgentRoute(page, agent);
+    await expectComposerVisible(page);
+    await writeCompactDraft(page, draft);
+    await enterComposerFullscreen(page);
+    await sendComposerWithButton(page);
+    await expect(page.getByTestId("composer-fullscreen").getByRole("alert")).toHaveText(
+      "Requested mock prompt rejection",
+    );
+    await expectFullscreenErrorAboveSend(page);
+    await expect(composerLocator(page)).toHaveValue(draft);
+    await expect(composerLocator(page)).toBeEditable();
+    await expect(page.getByRole("button", { name: "Send message", exact: true })).toBeEnabled();
+    await sendComposerWithButton(page);
+    await expect(composerLocator(page)).toHaveValue("");
+    await expectComposerFullscreenControls(page);
+  } finally {
+    await agent.cleanup();
+  }
+});
+
+async function blurComposer(page: Page): Promise<void> {
+  await composerLocator(page).blur();
+  await expect(composerLocator(page)).not.toBeFocused();
+}
+
+/** Mid-band at the given height and near the editor's bottom edge. */
+async function reservedBandPoints(
+  page: Page,
+  bandX: number,
+  topY: number,
+): Promise<Array<{ x: number; y: number }>> {
+  const editor = (await composerLocator(page).boundingBox())!;
+  return [
+    { x: bandX, y: topY },
+    { x: bandX, y: editor.y + editor.height - 6 },
+  ];
+}
+
+test("the reserved band beside the inline editor focuses it", async ({ page }) => {
+  const agent = await seedMockAgentWorkspace({
+    repoPrefix: "composer-band-focus-",
+    title: "Composer band focus",
+  });
+  try {
+    await resizeComposerViewport(page, "portrait");
+    await openAgentRoute(page, agent);
+    await expectComposerVisible(page);
+    const exitButton = page.getByRole("button", { name: "Exit fullscreen", exact: true });
+    const fullscreenButton = page.getByRole("button", { name: "Fullscreen", exact: true });
+    const longDraft = "Band first line\nBand second line\nBand third line";
+    await writeCompactDraft(page, longDraft);
+    await expect(fullscreenButton).toBeVisible();
+    const button = (await fullscreenButton.boundingBox())!;
+    const bandX = button.x + button.width / 2;
+
+    await test.step("with the fullscreen button shown, the band under it focuses the editor", async () => {
+      for (const point of await reservedBandPoints(page, bandX, button.y + button.height + 10)) {
+        await blurComposer(page);
+        await page.mouse.click(point.x, point.y);
+        await expect(composerLocator(page)).toBeFocused();
+        await expect(composerLocator(page)).toHaveValue(longDraft);
+        await expect(exitButton).toHaveCount(0);
+      }
+    });
+
+    await test.step("the button itself still toggles fullscreen", async () => {
+      await fullscreenButton.click();
+      await expectComposerFullscreenControls(page);
+      await exitComposerFullscreen(page);
+      await expect(exitButton).toHaveCount(0);
+      await expect(composerLocator(page)).toHaveValue(longDraft);
+    });
+
+    await test.step("with no fullscreen button, the whole band still focuses the editor", async () => {
+      await writeCompactDraft(page, "Short");
+      await expect(fullscreenButton).toHaveCount(0);
+      const editor = (await composerLocator(page).boundingBox())!;
+      for (const point of await reservedBandPoints(page, bandX, editor.y + 6)) {
+        await blurComposer(page);
+        await page.mouse.click(point.x, point.y);
+        await expect(composerLocator(page)).toBeFocused();
+        await expect(composerLocator(page)).toHaveValue("Short");
+        await expect(exitButton).toHaveCount(0);
+      }
+    });
+  } finally {
+    await agent.cleanup();
+  }
+});
+
+test("fullscreen Send keeps the configured queue behavior while an agent runs", async ({
+  page,
+}) => {
+  await configureComposerQueueSend(page);
+  await resizeComposerViewport(page, "portrait");
+  const agent = await startRunningMockAgent(page, {
+    prefix: "composer-fullscreen-queue-",
+    model: "one-minute-stream",
+    prompt: "Stay running for fullscreen queue test.",
+  });
+  try {
+    await writeCompactDraft(page, "Queued first line\nSecond line\nThird line");
+    await enterComposerFullscreen(page);
+    await expectComposerFullscreenControls(page);
+    await queueComposerWithButton(page);
+    await expect(composerLocator(page)).toHaveValue("");
+    await expectComposerFullscreenControls(page);
+    await exitComposerFullscreen(page);
+    await expectQueuedMessageButton(page);
+  } finally {
+    await agent.cleanup();
+  }
+});
+
+test("image paste stays attached to the active editor across fullscreen entry and exit", async ({
+  page,
+}) => {
+  const agent = await seedMockAgentWorkspace({
+    repoPrefix: "composer-paste-remount-",
+    title: "Composer paste",
+  });
+  try {
+    await resizeComposerViewport(page, "portrait");
+    await openAgentRoute(page, agent);
+    await expectComposerVisible(page);
+    await writeCompactDraft(page, "First line\nSecond line\nThird line");
+    expect(await pasteComposerTestImage(page)).toBe(true);
+    await expect(page.getByTestId("composer-image-attachment-pill")).toHaveCount(1);
+    await enterComposerFullscreen(page);
+    expect(await pasteComposerTestImage(page)).toBe(true);
+    await exitComposerFullscreen(page);
+    await expect(page.getByTestId("composer-image-attachment-pill")).toHaveCount(2);
+    expect(await pasteComposerTestImage(page)).toBe(true);
+    await expect(page.getByTestId("composer-image-attachment-pill")).toHaveCount(3);
+  } finally {
+    await agent.cleanup();
+  }
+});
+
+test("retained agent tabs preserve fullscreen editing and paste when switched away and back", async ({
+  page,
+}) => {
+  const workspace = await seedWorkspace({ repoPrefix: "composer-retained-fullscreen-" });
+  try {
+    const first = await createMockIdleAgent(workspace.client, {
+      cwd: workspace.repoPath,
+      workspaceId: workspace.workspaceId,
+      title: "First retained chat",
+    });
+    const second = await createMockIdleAgent(workspace.client, {
+      cwd: workspace.repoPath,
+      workspaceId: workspace.workspaceId,
+      title: "Second retained chat",
+    });
+    await openWorkspaceWithAgents(page, [first, second]);
+    await resizeComposerViewport(page, "portrait");
+    const draft = "Live first line\nLive second line\nLive third line";
+    await writeCompactDraft(page, draft);
+    await enterComposerFullscreen(page);
+    await expectWorkspaceHeaderHidden(page);
+    await selectComposerDraftRange(page, 4, 17);
+    // Fullscreen covers the compact header, so a phone leaves the tab by exiting first;
+    // a desktop-width window still has the tab shortcut.
+    await resizeComposerViewport(page, "landscape");
+    await switchComposerTabWithKeyboard(page, "previous");
+    await expect(page.getByRole("button", { name: "Exit fullscreen", exact: true })).toHaveCount(0);
+    // The exit action belongs to the active pane: Escape here leaves the hidden tab alone.
+    await composerLocator(page).press("Escape");
+    await switchComposerTabWithKeyboard(page, "next");
+    await expectComposerFullscreenControls(page);
+    await switchComposerTabWithKeyboard(page, "previous");
+    await expect(page.getByRole("button", { name: "Exit fullscreen", exact: true })).toHaveCount(0);
+    await resizeComposerViewport(page, "portrait");
+    await expectWorkspaceHeaderVisible(page);
+    await writeCompactDraft(page, "Other tab draft");
+    await shrinkVisibleViewport(page);
+    await activateRetainedComposerTab(page, second.title);
+    await expectComposerFullscreenControls(page);
+    await expectWorkspaceHeaderHidden(page);
+    await expect(composerLocator(page)).toHaveValue(draft);
+    await expectComposerFullscreenFitsVisibleViewport(page);
+    await expectComposerDraftSelection(page, 4, 17);
+    await expect(composerLocator(page)).toBeFocused();
+    expect(await pasteComposerTestImage(page)).toBe(true);
+    await exitComposerFullscreen(page);
+    await expectAttachmentPill(page, "composer-image-attachment-pill");
+  } finally {
+    await workspace.cleanup();
+  }
+});
+
+test("the compact sidebar over a fullscreen editor leaves the exit action alone", async ({
+  page,
+}) => {
+  const agent = await seedMockAgentWorkspace({
+    repoPrefix: "composer-fullscreen-sidebar-",
+    title: "Fullscreen under sidebar",
+  });
+  try {
+    await resizeComposerViewport(page, "portrait");
+    await openAgentRoute(page, agent);
+    const draft = "Line one\nLine two\nLine three";
+    await writeCompactDraft(page, draft);
+    await enterComposerFullscreen(page);
+    await expectWorkspaceHeaderHidden(page);
+    // Fullscreen hides the header's menu button; the edge swipe still opens the list over it.
+    await swipeOpenMobileAgentSidebar(page);
+    await expectMobileAgentSidebarVisible(page);
+    // The list covers the pane, so the editor's exit action is not armed.
+    await page.keyboard.press("Escape");
+    await closeMobileAgentSidebar(page);
+    await expectMobileAgentSidebarHidden(page);
+    await expectComposerFullscreenControls(page);
+    await expect(composerLocator(page)).toHaveValue(draft);
+    await exitComposerFullscreen(page);
+    await expectWorkspaceHeaderVisible(page);
+  } finally {
+    await agent.cleanup();
+  }
+});
+
+test("retained inline composers keep usable capacity through hidden tab geometry", async ({
+  page,
+}) => {
+  const workspace = await seedWorkspace({ repoPrefix: "composer-retained-capacity-" });
+  try {
+    const first = await createMockIdleAgent(workspace.client, {
+      cwd: workspace.repoPath,
+      workspaceId: workspace.workspaceId,
+      title: "First capacity chat",
+    });
+    const second = await createMockIdleAgent(workspace.client, {
+      cwd: workspace.repoPath,
+      workspaceId: workspace.workspaceId,
+      title: "Second capacity chat",
+    });
+    await openWorkspaceWithAgents(page, [first, second]);
+    await resizeComposerViewport(page, "portrait");
+    const draft = "Retained long line\n".repeat(40);
+    await writeCompactDraft(page, draft);
+    await recordVisibleComposerGeometry(page);
+    await activateRetainedComposerTab(page, first.title);
+    await writeCompactDraft(page, "Other visible draft");
+    await activateRetainedComposerTab(page, second.title);
+    await expect(composerLocator(page)).toHaveValue(draft);
+    await expect.poll(() => composerHeight(page)).toBeLessThanOrEqual(160);
+    await expect(page.getByRole("button", { name: "Send message", exact: true })).toBeVisible();
+    await expectNoCollapsedVisibleComposer(page);
+  } finally {
+    await workspace.cleanup();
+  }
+});
+
+async function shrinkVisibleViewport(page: Page): Promise<void> {
+  const cdp = await page.context().newCDPSession(page);
+  await cdp.send("Emulation.setPageScaleFactor", { pageScaleFactor: 2 });
+  await expect.poll(() => page.evaluate(() => window.visualViewport!.height)).toBe(422);
+  await cdp.detach();
+}
+
+async function panVisibleViewport(page: Page): Promise<void> {
+  const cdp = await page.context().newCDPSession(page);
+  await cdp.send("Input.dispatchTouchEvent", {
+    type: "touchStart",
+    touchPoints: [{ x: 4, y: 300 }],
+  });
+  for (let y = 290; y >= 100; y -= 10) {
+    await cdp.send("Input.dispatchTouchEvent", {
+      type: "touchMove",
+      touchPoints: [{ x: 4, y }],
+    });
+  }
+  await cdp.send("Input.dispatchTouchEvent", { type: "touchEnd", touchPoints: [] });
+  await expect.poll(() => page.evaluate(() => window.visualViewport!.offsetTop)).toBeGreaterThan(0);
+  await cdp.detach();
+}
+
+test("fullscreen Send follows the visible viewport when it shrinks and pans", async ({ page }) => {
+  const agent = await seedMockAgentWorkspace({
+    repoPrefix: "composer-visible-viewport-",
+    title: "Visible viewport composer",
+  });
+  try {
+    await resizeComposerViewport(page, "portrait");
+    await openAgentRoute(page, agent);
+    await expectComposerVisible(page);
+    await writeCompactDraft(page, "First line\nSecond line\nThird line");
+    await enterComposerFullscreen(page);
+    await expectComposerFullscreenFitsVisibleViewport(page);
+    await shrinkVisibleViewport(page);
+    await expectComposerFullscreenFitsVisibleViewport(page);
+    await panVisibleViewport(page);
+    await expectComposerFullscreenFitsVisibleViewport(page);
+  } finally {
+    await agent.cleanup();
+  }
+});
@@ -116,6 +116,7 @@ for (const version of ["0.2.5", "0.7.2", "0.8.0"]) {
      );
      expect(workspaces).toHaveLength(1);
      gate.release();
+      await gate.waitForCreated();
      await expect.poll(async () => (await client.fetchAgents()).entries.length).toBe(1);
      const first = (await client.fetchAgents()).entries[0]!.agent;
      await client.waitForFinish(first.id, 20_000);
@@ -128,6 +129,7 @@ for (const version of ["0.2.5", "0.7.2", "0.8.0"]) {
      const secondPrompt = "Create another agent: emit 1 coalesced agent stream updates";
      await fillComposerDraft(page, secondPrompt);
      await pressSubmitBeforeTheNextRender(page, "Send message");
+      await gate.waitForCreated();
      await expect.poll(async () => (await client.fetchAgents()).entries.length).toBe(2);
      const second = (await client.fetchAgents()).entries.find(
        ({ agent }) => agent.id !== first.id,
@@ -206,21 +208,40 @@ for (const version of ["0.2.5", "0.7.2", "0.8.0"]) {
 async function holdLegacyAgentCreation(page: Page, port: number) {
  const readers = await loadSessionMessageReaders();
  const arrived = Promise.withResolvers<void>();
+  let created = Promise.withResolvers<void>();
+  let createRequestId: string | undefined;
  let release = () => {};
  let holding = true;
  await page.routeWebSocket(new RegExp(`:${port}/ws`), (browser) => {
    const server = browser.connectToServer();
    browser.onMessage((frame) => {
-      if (holding && readers.client(frame)?.type === "create_agent_request") {
+      const message = readers.client(frame);
+      if (message?.type === "create_agent_request") createRequestId = message.requestId;
+      if (holding && message?.type === "create_agent_request") {
        holding = false;
        release = () => server.send(frame);
        arrived.resolve();
      } else server.send(frame);
    });
-    server.onMessage((frame) => browser.send(frame));
+    server.onMessage((frame) => {
+      const message = readers.server(frame);
+      if (
+        message?.type === "status" &&
+        message.payload.status === "agent_created" &&
+        message.payload.requestId === createRequestId
+      ) {
+        created.resolve();
+      }
+      browser.send(frame);
+    });
  });
  return {
    waitForRequest: () => arrived.promise,
+    async waitForCreated() {
+      // Agent-list membership includes initialization, before the initial prompt starts.
+      await created.promise;
+      created = Promise.withResolvers<void>();
+    },
    release() {
      const send = release;
      release = () => {};
@@ -0,0 +1,29 @@
+import { test } from "../support/fixtures";
+import {
+  addCustomModel,
+  expectCustomModelRetained,
+  openCustomModels,
+  removeCustomModel,
+} from "../support/helpers/custom-models";
+
+const longModelId = "custom-model-with-a-long-name-".repeat(6);
+const shortModelId = "custom-short";
+
+for (const width of [1200, 390]) {
+  test(`removes a long custom model at ${width}px without removing another model`, async ({
+    page,
+  }) => {
+    await page.setViewportSize({ width: 1200, height: 1000 });
+    await openCustomModels(page);
+    await addCustomModel(page, shortModelId);
+    await addCustomModel(page, longModelId);
+
+    await test.step("remove the long model at the target width", async () => {
+      await page.setViewportSize({ width, height: 1000 });
+      await removeCustomModel(page, longModelId);
+      await expectCustomModelRetained(page, shortModelId);
+    });
+
+    await removeCustomModel(page, shortModelId);
+  });
+}
@@ -2,6 +2,7 @@ import { mkdir, readFile, writeFile } from "node:fs/promises";
 import path from "node:path";
 import { expect, test, type Page } from "../support/fixtures";
 import {
+  expandFolder,
  openFileExplorer,
  openFileFromExplorer,
  expectFileTabOpen,
@@ -70,6 +71,14 @@ async function selectFileView(page: Page, view: "Preview" | "Source"): Promise<v
  await expect(option).toHaveAttribute("aria-selected", "true");
 }

+async function expectMarkdownImageLoaded(page: Page, name: string): Promise<void> {
+  const image = page.getByRole("img", { name, exact: true });
+  await expect(image).toBeVisible();
+  await expect
+    .poll(() => image.locator("img").evaluate((element: HTMLImageElement) => element.naturalWidth))
+    .toBeGreaterThan(0);
+}
+
 function watchRequestsTo(page: Page, origin: string): string[] {
  const requests: string[] = [];
  page.on("request", (request) => {
@@ -96,6 +105,64 @@ async function seedAgentWithFileLink(input: LinkedFile) {
 }

 test.describe("CodeMirror workspace file editing", () => {
+  test("opens the non-ASCII file named by an assistant markdown link", async ({ page }) => {
+    const session = await seedMockAgentWorkspace({
+      repoPrefix: "encoded-markdown-link-",
+      title: "Non-ASCII file link",
+      initialPrompt: "Show the report link",
+      featureValues: { mockAssistantResponse: "[报告](docs/reports/开户赠金.md)" },
+    });
+    try {
+      await mkdir(path.join(session.cwd, "docs/reports"), { recursive: true });
+      await writeFile(path.join(session.cwd, "docs/reports/开户赠金.md"), "# Report opened\n");
+      await openAgentRoute(page, session);
+      await openAssistantMarkdownLink(page, "报告");
+      await expectFileTabOpen(page, "docs/reports/开户赠金.md");
+      await expect(
+        page
+          .getByTestId("workspace-file-pane")
+          .filter({ visible: true })
+          .getByText("Report opened", { exact: true }),
+      ).toBeVisible();
+      await page.screenshot({ path: test.info().outputPath("non-ascii-file-opened.png") });
+    } finally {
+      await session.cleanup();
+    }
+  });
+
+  for (const order of ["raw-first", "href-first"] as const) {
+    test(`opens literal and encoded percent filenames independently ${order}`, async ({ page }) => {
+      const session = await seedMockAgentWorkspace({
+        repoPrefix: "percent-link-cache-",
+        title: "Distinct file links",
+        initialPrompt: "Show both filenames",
+        featureValues: {
+          mockAssistantResponse: "Raw `literal%20.md`. [Decoded](literal%20.md).",
+        },
+      });
+      try {
+        await writeFile(path.join(session.cwd, "literal%20.md"), "# Literal filename\n");
+        await writeFile(path.join(session.cwd, "literal .md"), "# Decoded filename\n");
+        await openAgentRoute(page, session);
+        const links = order === "raw-first" ? ["raw", "href"] : ["href", "raw"];
+        for (const link of links) {
+          await returnToAssistant(page, session.agentId);
+          if (link === "raw") {
+            await openAssistantInlinePath(page, "literal%20.md");
+            await expectFileTabOpen(page, "literal%20.md");
+            await expectPreviewText(page, "Literal filename");
+          } else {
+            await openAssistantMarkdownLink(page, "Decoded");
+            await expectFileTabOpen(page, "literal .md");
+            await expectPreviewText(page, "Decoded filename");
+          }
+        }
+      } finally {
+        await session.cleanup();
+      }
+    });
+  }
+
  test("jumps to each relative reference to the same file", async ({ page }) => {
    const session = await seedMockAgentWorkspace({
      repoPrefix: "relative-reference-qa-",
@@ -626,6 +693,40 @@ test.describe("CodeMirror workspace file editing", () => {
    await expect.poll(() => image.getAttribute("src")).not.toBe(initialSource);
  });

+  test("renders local relative images inside Markdown preview", async ({ page, withWorkspace }) => {
+    test.setTimeout(90_000);
+    const workspace = await withWorkspace({ prefix: "file-md-relative-image-" });
+    await mkdir(path.join(workspace.repoPath, "docs"), { recursive: true });
+    await mkdir(path.join(workspace.repoPath, "data", "cache"), { recursive: true });
+    await writeFile(path.join(workspace.repoPath, "docs", "sibling.png"), RED_PIXEL);
+    await writeFile(path.join(workspace.repoPath, "data", "cache", "hero.png"), RED_PIXEL);
+    await writeFile(
+      path.join(workspace.repoPath, "docs", "guide.md"),
+      [
+        "# Guide",
+        "",
+        "![sibling](./sibling.png)",
+        "",
+        "![hero](../data/cache/hero.png?v=2#preview)",
+        "",
+      ].join("\n"),
+      "utf8",
+    );
+    await workspace.navigateTo();
+    await openFileExplorer(page);
+    await expandFolder(page, "docs");
+    await openFileFromExplorer(page, "guide.md");
+    await expectFileTabOpen(page, "docs/guide.md");
+
+    const visibleFilePane = page.getByTestId("workspace-file-pane").filter({ visible: true });
+    await expect(visibleFilePane.getByText("Guide", { exact: true })).toBeVisible();
+    await expectMarkdownImageLoaded(page, "sibling");
+    await expectMarkdownImageLoaded(page, "hero");
+    await visibleFilePane.screenshot({
+      path: test.info().outputPath("markdown-relative-images.png"),
+    });
+  });
+
  test("previews and refreshes an HTML plan while preserving source access", async ({
    page,
    withWorkspace,
@@ -757,3 +858,24 @@ test.describe("CodeMirror workspace file editing", () => {
    await expect(page.getByLabel("Vim mode NORMAL")).toBeVisible();
  });
 });
+
+async function openAssistantMarkdownLink(page: Page, name: string): Promise<void> {
+  await page.getByRole("link", { name, exact: true }).first().click();
+}
+
+async function returnToAssistant(page: Page, agentId: string): Promise<void> {
+  await page.getByTestId(`workspace-tab-agent_${agentId}`).filter({ visible: true }).click();
+}
+
+async function openAssistantInlinePath(page: Page, token: string): Promise<void> {
+  await page.getByText(token, { exact: true }).click();
+}
+
+async function expectPreviewText(page: Page, text: string): Promise<void> {
+  await expect(
+    page
+      .getByTestId("workspace-file-pane")
+      .filter({ visible: true })
+      .getByText(text, { exact: true }),
+  ).toBeVisible();
+}
@@ -2,10 +2,10 @@ import { mkdir, readFile, rm, writeFile } from "node:fs/promises";
 import path from "node:path";
 import { expect, type Page } from "@playwright/test";
 import { test } from "../support/fixtures";
-import { openFileExplorer } from "../support/helpers/file-explorer";
+import { downloadFileFromExplorer, openFileExplorer } from "../support/helpers/file-explorer";
 import { openChangesPanel } from "../support/helpers/workspace-tabs";
 import { gotoWorkspace } from "../support/helpers/launcher";
-import { daemonWsRoutePattern } from "../support/helpers/daemon-port";
+import { daemonWsRoutePattern, getE2EDaemonPort } from "../support/helpers/daemon-port";
 import { seedWorkspace, type SeededWorkspace } from "../support/helpers/seed-client";

 let workspace: SeededWorkspace;
@@ -444,3 +444,25 @@ test("hides unsupported file operations and revert actions", async ({ page }) =>
  await expect(page.getByTestId("diff-file-0-duplicate")).toHaveCount(0);
  await expect(page.getByTestId("diff-file-0-revert")).toHaveCount(0);
 });
+
+test("downloads a file over direct TCP with its original filename and bytes", async ({
+  page,
+}, testInfo) => {
+  const fileName = "rapport données.bin";
+  const source = Buffer.from([0, 1, 2, 127, 128, 255, 10]);
+  await writeFile(path.join(workspace.workspaceDirectory, fileName), source);
+  await gotoWorkspace(page, workspace.workspaceId);
+  await openFileExplorer(page);
+
+  const downloaded = await downloadFileFromExplorer(page, fileName);
+  const url = new URL(downloaded.url());
+  expect(url.protocol).toBe("http:");
+  expect(url.port).toBe(getE2EDaemonPort());
+  expect(url.pathname).toBe("/api/files/download");
+  expect(url.searchParams.get("token")).toBeTruthy();
+  expect(downloaded.suggestedFilename()).toBe(fileName);
+  const savedFile = testInfo.outputPath(fileName);
+  await downloaded.saveAs(savedFile);
+  expect(await downloaded.failure()).toBeNull();
+  expect(await readFile(savedFile)).toEqual(source);
+});
@@ -6,6 +6,15 @@ import {
  selectWorkspaceIsolation,
 } from "../support/helpers/new-workspace";
 import { seedWorkspace } from "../support/helpers/seed-client";
+import { openAgentRoute, seedMockAgentWorkspace } from "../support/helpers/mock-agent";
+import {
+  composerLocator,
+  expectComposerVisible,
+  fillComposerDraft,
+  enterComposerFullscreen,
+  resizeComposerViewport,
+  expectComposerFullscreenControls,
+} from "../support/helpers/composer";
 import { waitForSidebarHydration } from "../support/helpers/workspace-ui";

 type WebSocketMessage = string | Buffer;
@@ -196,3 +205,52 @@ test.describe("New Workspace dictation submit", () => {
    }
  });
 });
+
+async function startDictationWithShortcut(page: Page): Promise<void> {
+  await composerLocator(page).press("Control+d");
+}
+
+test("dictation shortcut leaves retained fullscreen and exposes recording controls", async ({
+  page,
+}) => {
+  const agent = await seedMockAgentWorkspace({
+    repoPrefix: "fullscreen-dictation-",
+    title: "Fullscreen dictation shortcut",
+  });
+  await installSyntheticMicrophone(page);
+  const harness = await installDictationFailureHarness(page);
+  const draft = "First line\nSecond line\nThird line";
+  try {
+    await resizeComposerViewport(page, "portrait");
+    await openAgentRoute(page, agent);
+    await expectComposerVisible(page);
+    await fillComposerDraft(page, draft);
+    await enterComposerFullscreen(page);
+    await resizeComposerViewport(page, "landscape");
+    await expectComposerFullscreenControls(page);
+    await startDictationWithShortcut(page);
+    await harness.waitForAudio();
+    await expect(page.getByRole("button", { name: "Exit fullscreen", exact: true })).toHaveCount(0);
+    await expect(page.getByRole("button", { name: "Cancel dictation", exact: true })).toBeVisible();
+    await expect(
+      page.getByRole("button", { name: "Insert transcription", exact: true }),
+    ).toBeVisible();
+    await expect(
+      page.getByRole("button", { name: "Insert transcription and send", exact: true }),
+    ).toBeVisible();
+    await page.getByRole("button", { name: "Cancel dictation", exact: true }).click();
+    await expect(composerLocator(page)).toBeEditable();
+    await expect(composerLocator(page)).toHaveValue(draft);
+    await resizeComposerViewport(page, "portrait");
+    await enterComposerFullscreen(page);
+    await resizeComposerViewport(page, "landscape");
+    await composerLocator(page).press("Control+Shift+d");
+    await expect(page.getByRole("button", { name: "Exit fullscreen", exact: true })).toHaveCount(0);
+    await expect(
+      page.getByText("Realtime voice is disabled in this test.", { exact: true }),
+    ).toBeVisible();
+    await expect(composerLocator(page)).toHaveValue(draft);
+  } finally {
+    await agent.cleanup();
+  }
+});
@@ -1,7 +1,18 @@
-import { expect, test } from "../support/fixtures";
+import { expect, test, type Page } from "../support/fixtures";
 import { gotoAppShell } from "../support/helpers/app";
 import { waitForSidebarHydration } from "../support/helpers/workspace-ui";
-import { openNewWorkspaceComposer } from "../support/helpers/new-workspace";
+import {
+  expectNewWorkspaceDraft,
+  fillNewWorkspaceDraft,
+  openNewWorkspaceComposer,
+} from "../support/helpers/new-workspace";
+import {
+  composerLocator,
+  enterComposerFullscreen,
+  exitComposerFullscreen,
+  expectComposerFullscreenControls,
+  resizeComposerViewport,
+} from "../support/helpers/composer";
 import { seedWorkspace, type SeededWorkspace } from "../support/helpers/seed-client";
 import {
  expectTerminalLaunchSelected,
@@ -9,13 +20,12 @@ import {
  expectTerminalPreviewCommand,
  expectWorkspaceOpensWithTerminalTab,
  fillTerminalPrompt,
-  seedTerminalProfiles,
+  launchTrigger,
  selectLaunchOption,
  submitTerminalLaunch,
  terminalLaunchSubmit,
  terminalPromptInput,
  type TerminalProfile,
-  type TerminalProfileSeed,
 } from "../support/helpers/new-workspace-launch";

 // Someone who wants a terminal agent instead of a chat: they pick a profile
@@ -42,17 +52,18 @@ const BARE_PROFILE: TerminalProfile = {
  args: ["-c", "echo bare-launch-static-line; exec cat"],
 };

+test.use({
+  e2eDaemonConfig: { version: 1, daemon: { terminalProfiles: [PROMPT_PROFILE, BARE_PROFILE] } },
+});
+
 test.describe("New workspace: launching a terminal", () => {
  let workspace: SeededWorkspace;
-  let profileSeed: TerminalProfileSeed;

  test.beforeEach(async () => {
    workspace = await seedWorkspace({ repoPrefix: "launch-terminal-" });
-    profileSeed = await seedTerminalProfiles([PROMPT_PROFILE, BARE_PROFILE]);
  });

  test.afterEach(async () => {
-    await profileSeed.restore();
    await workspace?.cleanup();
  });

@@ -97,4 +108,165 @@ test.describe("New workspace: launching a terminal", () => {
      await expectTerminalOutputContains(page, "bare-launch-static-line");
    });
  });
+
+  test("switching terminal profiles restores the prompt and its fullscreen affordance", async ({
+    page,
+  }) => {
+    await gotoAppShell(page);
+    await waitForSidebarHydration(page);
+    await openNewWorkspaceComposer(page, {
+      projectKey: workspace.projectKey,
+      projectDisplayName: workspace.projectDisplayName,
+    });
+    await page.setViewportSize({ width: 390, height: 844 });
+    const prompt = "First replacement line\nSecond replacement line\nThird replacement line";
+    const selectProfile = async (profile: TerminalProfile) => {
+      await launchTrigger(page).click();
+      const option = page.getByRole("menuitem").filter({ hasText: profile.name });
+      await option.click();
+      await expect(option).not.toBeVisible();
+    };
+    const fullscreen = page.getByRole("button", { name: "Fullscreen", exact: true });
+
+    await test.step("restore a multiline prompt after a read-only profile", async () => {
+      await selectProfile(PROMPT_PROFILE);
+      await fillTerminalPrompt(page, prompt);
+      await expect(fullscreen).toBeVisible();
+      await selectProfile(BARE_PROFILE);
+      await expect(terminalPromptInput(page)).toHaveCount(0);
+      await selectProfile(PROMPT_PROFILE);
+      await expect(terminalPromptInput(page)).toHaveValue(prompt);
+      await expect(fullscreen).toBeVisible();
+    });
+
+    await test.step("restore the locally edited prompt and measure subsequent typing", async () => {
+      await fillTerminalPrompt(page, "Short draft");
+      await expect(fullscreen).toHaveCount(0);
+      await selectProfile(BARE_PROFILE);
+      await selectProfile(PROMPT_PROFILE);
+      await expect(terminalPromptInput(page)).toHaveValue("Short draft");
+      await expect(fullscreen).toHaveCount(0);
+      await terminalPromptInput(page).press("End");
+      await terminalPromptInput(page).press("Shift+Enter");
+      await terminalPromptInput(page).pressSequentially("Second");
+      await terminalPromptInput(page).press("Shift+Enter");
+      await terminalPromptInput(page).pressSequentially("Third");
+      await expect(terminalPromptInput(page)).toHaveValue("Short draft\nSecond\nThird");
+      await expect(fullscreen).toBeVisible();
+    });
+  });
+});
+
+async function expectNewWorkspaceHeaderHidden(page: Page): Promise<void> {
+  await expect(page.getByTestId("menu-button").filter({ visible: true })).toHaveCount(0);
+}
+
+async function expectNewWorkspaceHeaderVisible(page: Page): Promise<void> {
+  await expect(page.getByTestId("menu-button").filter({ visible: true }).first()).toBeVisible();
+}
+
+/**
+ * Fullscreen fills the content area top to bottom and out to the right edge (a pinned
+ * sidebar keeps its column), covers the form, and shows only exit and the mode's submit.
+ */
+async function expectNewWorkspaceFullscreen(page: Page, submitLabel: string): Promise<void> {
+  const frame = page.getByTestId("composer-fullscreen");
+  await expect(page.getByRole("button", { name: "Exit fullscreen", exact: true })).toBeVisible();
+  await expect(frame.getByRole("button")).toHaveCount(2);
+  await expect(frame.getByRole("button", { name: submitLabel })).toBeVisible();
+  await expectNewWorkspaceHeaderHidden(page);
+  const picker = (await page.getByRole("button", { name: "Workspace project" }).boundingBox())!;
+  await expect
+    .poll(() =>
+      frame.evaluate(
+        (element, point) => {
+          const viewport = window.visualViewport!;
+          const box = element.getBoundingClientRect();
+          const covering = document.elementFromPoint(point.x, point.y);
+          return {
+            fillsHeight:
+              Math.abs(box.top - viewport.offsetTop) < 1 &&
+              Math.abs(box.height - viewport.height) < 1,
+            reachesRightEdge:
+              Math.abs(box.right - (viewport.offsetLeft + viewport.width)) < 1 &&
+              box.left >= viewport.offsetLeft,
+            coversForm: element.contains(covering),
+          };
+        },
+        { x: picker.x + picker.width / 2, y: picker.y + picker.height / 2 },
+      ),
+    )
+    .toEqual({ fillsHeight: true, reachesRightEdge: true, coversForm: true });
+}
+
+test.describe("New workspace: fullscreen composer across the compact breakpoint", () => {
+  let workspace: SeededWorkspace;
+
+  test.beforeEach(async () => {
+    workspace = await seedWorkspace({ repoPrefix: "launch-fullscreen-" });
+  });
+
+  test.afterEach(async () => {
+    await workspace?.cleanup();
+  });
+
+  test("chat fullscreen survives widening and terminal fullscreen fills the phone", async ({
+    page,
+  }) => {
+    test.setTimeout(90_000);
+    await gotoAppShell(page);
+    await waitForSidebarHydration(page);
+    await openNewWorkspaceComposer(page, {
+      projectKey: workspace.projectKey,
+      projectDisplayName: workspace.projectDisplayName,
+    });
+    const projectPicker = page.getByRole("button", { name: "Workspace project" });
+
+    await test.step("chat: fullscreen covers the centered form and exits back into it", async () => {
+      await resizeComposerViewport(page, "portrait");
+      const draft = "Chat first line\nChat second line\nChat third line";
+      await fillNewWorkspaceDraft(page, draft);
+      await enterComposerFullscreen(page);
+      await expectComposerFullscreenControls(page);
+      await expectNewWorkspaceHeaderHidden(page);
+      await resizeComposerViewport(page, "landscape");
+      await expectComposerFullscreenControls(page);
+      await expectNewWorkspaceFullscreen(page, "Create");
+      // The desktop form's own import button is dropped from the fullscreen slot.
+      await expect(
+        page.getByTestId("new-workspace-import-session").filter({ visible: true }),
+      ).toHaveCount(0);
+      await composerLocator(page).press("End");
+      await composerLocator(page).pressSequentially(" wide");
+      await exitComposerFullscreen(page);
+      await expectNewWorkspaceHeaderVisible(page);
+      await expect(projectPicker).toBeVisible();
+      await expect(
+        page.getByTestId("new-workspace-import-session").filter({ visible: true }),
+      ).toBeVisible();
+      await expectNewWorkspaceDraft(page, `${draft} wide`);
+    });
+
+    // Terminal mode and its prompt are screen state, and the shell remounts the screen
+    // at the breakpoint, so the terminal prompt's fullscreen is exercised on the phone
+    // layout only.
+    await test.step("terminal: the prompt's fullscreen shows only exit and Launch", async () => {
+      await resizeComposerViewport(page, "portrait");
+      // The compact launch control opens a sheet, not the desktop menu.
+      await launchTrigger(page).click();
+      const option = page.getByRole("menuitem").filter({ hasText: PROMPT_PROFILE.name });
+      await option.click();
+      await expect(option).not.toBeVisible();
+      await expectTerminalLaunchSelected(page, PROMPT_PROFILE.name);
+      const prompt = "Prompt first line\nPrompt second line\nPrompt third line";
+      await fillTerminalPrompt(page, prompt);
+      await enterComposerFullscreen(page);
+      await expect(terminalPromptInput(page)).toBeVisible();
+      await expectNewWorkspaceFullscreen(page, "Launch");
+      await exitComposerFullscreen(page);
+      await expectNewWorkspaceHeaderVisible(page);
+      await expect(projectPicker).toBeVisible();
+      await expect(terminalPromptInput(page)).toHaveValue(prompt);
+    });
+  });
 });
@@ -1,6 +1,8 @@
 import { test } from "../support/fixtures";
 import { startIsolatedHostDaemon } from "../support/helpers/isolated-host-daemon";
 import {
+  expectPairingOffer,
+  expectCompletePairingQr,
  expectRelayConsent,
  openPairDeviceModal,
  preparePairingHost,
@@ -18,3 +20,20 @@ test("opens relay consent in browser web", async ({ page }) => {
    await daemon.close();
  }
 });
+
+test("keeps the pairing QR code inside its compact tile", async ({ page }, testInfo) => {
+  const daemon = await startIsolatedHostDaemon("pair-device-browser-compact", {
+    mutableRelay: { enabled: true },
+  });
+  try {
+    await preparePairingHost(page, daemon);
+    await page.setViewportSize({ width: 320, height: 568 });
+    await openPairDeviceModal(page);
+    await expectPairingOffer(page);
+
+    await expectCompletePairingQr(page);
+    await page.screenshot({ path: testInfo.outputPath("pairing-compact.png") });
+  } finally {
+    await daemon.close();
+  }
+});
@@ -0,0 +1,64 @@
+import { execFileSync } from "node:child_process";
+import { mkdtemp, rm, writeFile } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import path from "node:path";
+import { expect, test as base } from "../support/fixtures";
+import { gotoWorkspace } from "../support/helpers/launcher";
+import { openChangesTreePanel } from "../support/helpers/workspace-tabs";
+
+const test = base.extend<{ projectWithTrailingSpace: string }>({
+  projectWithTrailingSpace: async ({ e2eWorkerClient: client }, provide) => {
+    const root = await mkdtemp(path.join(tmpdir(), "paseo-project-path-spaces-"));
+    try {
+      const repoPath = path.join(root, "repo ");
+      execFileSync("git", ["init", "-b", "main", repoPath], { stdio: "pipe" });
+      execFileSync(
+        "git",
+        [
+          "-c",
+          "user.name=Paseo Test",
+          "-c",
+          "user.email=test@getpaseo.local",
+          "-c",
+          "commit.gpgsign=false",
+          "commit",
+          "--allow-empty",
+          "-m",
+          "initial",
+        ],
+        { cwd: repoPath, stdio: "pipe" },
+      );
+      await writeFile(path.join(repoPath, "visible-change.txt"), "a change\n");
+      const added = await client.addProject(repoPath);
+      expect(added.error).toBeNull();
+      const projectId = added.project!.projectId;
+      try {
+        const created = await client.createWorkspace({
+          source: { kind: "directory", path: repoPath, projectId },
+        });
+        expect(created.error).toBeNull();
+        await provide(created.workspace!.id);
+      } finally {
+        await client.removeProject(projectId);
+      }
+    } finally {
+      await rm(root, { recursive: true, force: true });
+    }
+  },
+});
+
+test.skip(
+  process.platform === "win32",
+  "Windows does not preserve trailing spaces in folder names",
+);
+
+test("Changes shows files in a project whose folder ends in a space", async ({
+  page,
+  projectWithTrailingSpace,
+}, testInfo) => {
+  await gotoWorkspace(page, projectWithTrailingSpace);
+  await openChangesTreePanel(page);
+  await expect(page.getByText("visible-change.txt", { exact: true }).first()).toBeVisible();
+  await expect(page.getByText("Not a git repository", { exact: true })).toHaveCount(0);
+  await page.screenshot({ path: testInfo.outputPath("changes.png") });
+});
@@ -10,16 +10,29 @@ import {
  openSettingsHost,
  openSettingsHostSection,
 } from "../support/helpers/settings";
+import { copyPluginExample } from "../support/helpers/plugin-fixture";

 const CUSTOM_PROVIDER = {
  id: "junie",
  name: "Junie",
 } as const;

+const PLUGIN_PROVIDER = {
+  id: "direct-example",
+  name: "Direct provider example",
+  pluginId: "provider-direct-example",
+} as const;
+
 interface ProviderRemovalDaemonClient {
  connect(): Promise<void>;
  close(): Promise<void>;
-  patchDaemonConfig(config: { removeProviders?: string[] }): Promise<unknown>;
+  getDaemonConfig(): Promise<{ config: { pluginsEnabled?: boolean } }>;
+  patchDaemonConfig(config: {
+    removeProviders?: string[];
+    pluginsEnabled?: boolean;
+  }): Promise<unknown>;
+  installDirectoryPlugin(path: string): Promise<unknown>;
+  removePlugin(pluginId: string): Promise<void>;
  getProvidersSnapshot(): Promise<{
    entries: Array<{ provider: string; source?: "builtin" | "custom" }>;
  }>;
@@ -93,4 +106,45 @@ test.describe("provider removal", () => {
      await client.close().catch(() => undefined);
    }
  });
+
+  test("does not offer Remove for a plugin-registered provider", async ({ page }) => {
+    test.setTimeout(120_000);
+    const client = await connectDaemonClient<ProviderRemovalDaemonClient>({
+      clientIdPrefix: "provider-removal-e2e",
+    });
+
+    const plugin = await copyPluginExample("provider-direct");
+    try {
+      const previous = await client.getDaemonConfig();
+      try {
+        await client.patchDaemonConfig({ pluginsEnabled: true });
+        await client.installDirectoryPlugin(plugin.directory);
+
+        await gotoAppShell(page);
+        await openSettings(page);
+        await openSettingsHost(page, getServerId());
+        await openSettingsHostSection(page, getServerId(), "providers");
+
+        const pluginProviderRow = page.getByRole("button", {
+          name: `${PLUGIN_PROVIDER.name} provider details`,
+          exact: true,
+        });
+        await expect(pluginProviderRow).toBeVisible();
+        await expect(page.getByTestId(`provider-actions-${PLUGIN_PROVIDER.id}`)).toHaveCount(0);
+
+        // The provider survives a removeProviders patch pointed at it: the
+        // plugin, not config.json, owns the definition.
+        await client.patchDaemonConfig({ removeProviders: [PLUGIN_PROVIDER.id] });
+        await expect(pluginProviderRow).toBeVisible();
+      } finally {
+        await client.removePlugin(PLUGIN_PROVIDER.pluginId).catch(() => undefined);
+        await client
+          .patchDaemonConfig({ pluginsEnabled: previous.config.pluginsEnabled })
+          .catch(() => undefined);
+      }
+    } finally {
+      await client.close().catch(() => undefined);
+      await plugin.cleanup();
+    }
+  });
 });
@@ -7,6 +7,7 @@ import {
  expectQuestionDismissEnabled,
  expectQuestionHidden,
  expectQuestionNavigationEnabled,
+  expectQuestionOptionPreview,
  expectQuestionOptionSelected,
  expectQuestionPrimaryActionDisabled,
  expectQuestionPrimaryActionEnabled,
@@ -61,6 +62,10 @@ test.describe("Question prompt pagination", () => {
      await expectQuestionOptionSelected(page, "App");

      await openQuestion(page, { index: 2, total: TOTAL_QUESTIONS });
+      await expectQuestionOptionPreview(page, {
+        option: "Behind feature flag",
+        preview: 'flags.enabled("new-surface")',
+      });
      await chooseQuestionOption(page, "Behind feature flag");
      await expectCurrentQuestion(page, {
        index: 3,
@@ -0,0 +1,74 @@
+import type { Page } from "@playwright/test";
+import { test, expect } from "../support/fixtures";
+import { gotoAppShell } from "../support/helpers/app";
+import { seedWorkspace } from "../support/helpers/seed-client";
+import { getServerId } from "../support/helpers/server-id";
+import {
+  expectSidebarWorkspaceSelected,
+  switchWorkspaceViaSidebar,
+} from "../support/helpers/workspace-ui";
+
+async function readVisibleWorkspaceOrder(page: Page): Promise<string[]> {
+  const rows = page.getByRole("button", { name: /^Workspace \d{2}$/ });
+  await expect(rows).toHaveCount(12);
+  return rows.evaluateAll(
+    (elements, prefix) =>
+      elements.map((element) => element.getAttribute("data-testid")!.slice(prefix.length)),
+    `sidebar-workspace-row-${getServerId()}:`,
+  );
+}
+
+async function navigateWorkspace(
+  page: Page,
+  direction: "next" | "previous",
+  workspaceId: string,
+): Promise<void> {
+  await page.keyboard.press(direction === "next" ? "Alt+]" : "Alt+[");
+  await expectSidebarWorkspaceSelected({ page, serverId: getServerId(), workspaceId });
+  await expect(page).toHaveURL(new RegExp(`/workspace/${workspaceId}$`));
+}
+
+test("previous and next traverse every visible workspace while digit shortcuts stop at nine", async ({
+  page,
+}) => {
+  test.setTimeout(120_000);
+  const project = await seedWorkspace({
+    repoPrefix: "relative-navigation-",
+    title: "Workspace 01",
+  });
+  try {
+    for (let index = 2; index <= 12; index += 1) {
+      const created = await project.client.createWorkspace({
+        source: { kind: "directory", path: project.repoPath },
+        title: `Workspace ${String(index).padStart(2, "0")}`,
+      });
+      expect(created.error).toBeNull();
+    }
+    await page.setViewportSize({ width: 1440, height: 1100 });
+    await gotoAppShell(page);
+    const order = await readVisibleWorkspaceOrder(page);
+
+    await test.step("next crosses the ninth workspace and previous returns to it", async () => {
+      await switchWorkspaceViaSidebar({ page, serverId: getServerId(), workspaceId: order[8] });
+      await navigateWorkspace(page, "next", order[9]);
+      await navigateWorkspace(page, "previous", order[8]);
+    });
+
+    await test.step("wrapping uses the true first and last visible workspace", async () => {
+      await switchWorkspaceViaSidebar({ page, serverId: getServerId(), workspaceId: order[0] });
+      await navigateWorkspace(page, "previous", order[11]);
+      await navigateWorkspace(page, "next", order[0]);
+    });
+
+    await test.step("the ninth digit shortcut still selects the ninth workspace", async () => {
+      await page.keyboard.press("Alt+9");
+      await expectSidebarWorkspaceSelected({
+        page,
+        serverId: getServerId(),
+        workspaceId: order[8],
+      });
+    });
+  } finally {
+    await project.cleanup();
+  }
+});
@@ -1,3 +1,4 @@
+import type { Page, TestInfo } from "@playwright/test";
 import { randomUUID } from "node:crypto";
 import { test, expect } from "../support/fixtures";
 import { openAgentRoute, seedMockAgentWorkspace } from "../support/helpers/mock-agent";
@@ -6,6 +7,31 @@ import type { SeedDaemonClient } from "../support/helpers/seed-client";

 const MOBILE_VIEWPORT = { width: 390, height: 844 };

+test.use({ viewport: MOBILE_VIEWPORT, deviceScaleFactor: 2 });
+
+async function openTabSwitcher(page: Page) {
+  await page.getByRole("button", { name: /Switch tabs/ }).click();
+  const footer = page.getByRole("button", { name: "New terminal", exact: true });
+  await expect(footer).toBeVisible();
+  // Visibility alone passes while the sheet is still travelling up from below the viewport.
+  await expect
+    .poll(async () => {
+      const bounds = await footer.boundingBox();
+      return bounds ? bounds.y + bounds.height : Number.POSITIVE_INFINITY;
+    })
+    .toBeLessThanOrEqual(MOBILE_VIEWPORT.height);
+}
+
+async function captureScreen(page: Page, testInfo: TestInfo, name: string) {
+  await page.screenshot({ path: testInfo.outputPath(name + ".png") });
+}
+
+async function createTabFromSwitcher(page: Page, kind: "New agent" | "New terminal") {
+  await openTabSwitcher(page);
+  await page.getByRole("button", { name: kind, exact: true }).click();
+  await expect(page.getByRole("button", { name: "Bottom sheet backdrop" })).toHaveCount(0);
+}
+
 async function fetchAgentTitle(client: SeedDaemonClient, agentId: string): Promise<string | null> {
  const result = await client.fetchAgents({ scope: "active" });
  return result.entries.find((entry) => entry.agent.id === agentId)?.agent.title ?? null;
@@ -20,7 +46,7 @@ async function fetchAgentTitle(client: SeedDaemonClient, agentId: string): Promi
 test.describe("Workspace session rename (compact tab switcher)", () => {
  test("renames an agent session from the switcher's per-session actions sheet", async ({
    page,
-  }) => {
+  }, testInfo) => {
    test.setTimeout(120_000);

    await page.setViewportSize(MOBILE_VIEWPORT);
@@ -36,8 +62,10 @@ test.describe("Workspace session rename (compact tab switcher)", () => {
        timeout: 30_000,
      });

+      await captureScreen(page, testInfo, "compact-chat-header");
+
      // Open the sessions dropdown (a bottom sheet on compact).
-      await page.getByRole("button", { name: /Switch tabs/ }).click();
+      await openTabSwitcher(page);
      await expect(page.getByRole("button", { name: "Bottom sheet backdrop" }).first()).toBeVisible(
        {
          timeout: 10_000,
@@ -65,12 +93,58 @@ test.describe("Workspace session rename (compact tab switcher)", () => {
      await renameModalSubmit(page, modalPrefix).click();

      await expect(input).toHaveCount(0, { timeout: 15_000 });
-      await expect(page.getByTestId("workspace-tab-switcher-trigger")).toContainText(renamed, {
+      await expect(page.getByText(renamed, { exact: true })).toBeVisible({
        timeout: 15_000,
      });
+      await expect(page.getByRole("button", { name: /Switch tabs/ })).toHaveText("1");
      await expect.poll(() => fetchAgentTitle(session.client, session.agentId)).toBe(renamed);
+      await expect(page.getByRole("button", { name: "Bottom sheet backdrop" })).toHaveCount(1);
+      await expect(page.getByText("Rename agent", { exact: true })).toBeHidden();
+      await captureScreen(page, testInfo, "renamed-tab-in-switcher");
    } finally {
      await session.cleanup();
    }
  });
 });
+
+test("switcher footer creates tabs and returns to the existing chat", async ({
+  page,
+}, testInfo) => {
+  const session = await seedMockAgentWorkspace({
+    repoPrefix: "compact-header-actions-",
+    title: "Existing chat",
+  });
+  try {
+    await openAgentRoute(page, session);
+    await expect(page.getByRole("button", { name: /Switch tabs/ })).toHaveText("1");
+
+    await createTabFromSwitcher(page, "New terminal");
+    await expect(page.getByRole("button", { name: /Switch tabs/ })).toHaveText("2");
+    await expect(page.getByTestId("terminal-surface").filter({ visible: true })).toHaveCount(1);
+    await captureScreen(page, testInfo, "compact-terminal-header");
+
+    await createTabFromSwitcher(page, "New agent");
+    await expect(page.getByRole("button", { name: /Switch tabs/ })).toHaveText("3");
+    await expect(
+      page.getByRole("textbox", { name: "Message agent..." }).filter({ visible: true }),
+    ).toHaveCount(1);
+    await captureScreen(page, testInfo, "compact-draft-header");
+
+    await openTabSwitcher(page);
+    await expect(page.getByText("Existing chat", { exact: true })).toBeVisible();
+    await captureScreen(page, testInfo, "switcher-three-tabs");
+    await page.getByText("Existing chat", { exact: true }).click();
+    await expect(page.getByRole("button", { name: "Bottom sheet backdrop" })).toHaveCount(0);
+    await expect(page.getByRole("button", { name: /Switch tabs/ })).toHaveText("3");
+
+    await openTabSwitcher(page);
+    await expect(page.getByText("Existing chat", { exact: true })).toBeVisible();
+    await page
+      .getByRole("button", { name: "Bottom sheet backdrop" })
+      .click({ position: { x: 10, y: 10 } });
+    await expect(page.getByRole("button", { name: "Bottom sheet backdrop" })).toHaveCount(0);
+    await captureScreen(page, testInfo, "returned-chat-header");
+  } finally {
+    await session.cleanup();
+  }
+});
@@ -0,0 +1,7 @@
+# Native question option preview
+
+`native-question-option-preview.android.ad` checks that every line of a long option preview is reachable on Android. Before replay, open a mock agent prompted with `emit synthetic questions` so its question card shows the first question, on a phone-sized emulator (validated on a 1080×1920 API 35 AVD). The flow opens the `rollout` question, drags slowly up from inside the "Behind feature flag" preview, and asserts the preview's last line is visible.
+
+```sh
+agent-device replay packages/app/e2e/mobile/agent-device/native-question-option-preview.android.ad --platform android --serial emulator-5554
+```
@@ -0,0 +1,10 @@
+context platform=android timeout=60000 retries=0
+env APP_ID=sh.paseo.debug
+
+open "${APP_ID}"
+wait "label=\"rollout\"" 20000
+press "label=\"rollout\""
+wait "id=\"question-form-option-preview\"" 10000
+gesture pan 570 1120 0 -440 600
+is visible "text=\"// LAST PREVIEW LINE\""
+close
@@ -2,9 +2,9 @@ context platform=ios timeout=60000 retries=1
 env APP_ID=sh.paseo.debug

 open "${APP_ID}"
-wait "id=\"workspace-header-menu-trigger\"" 20000
-press "id=\"workspace-header-menu-trigger\""
-press "id=\"workspace-header-new-terminal\""
+wait "id=\"workspace-tab-switcher-trigger\"" 20000
+press "id=\"workspace-tab-switcher-trigger\""
+press "id=\"workspace-tab-switcher-new-terminal\""
 wait "id=\"terminal-keyboard-toggle\"" 10000
 press "id=\"terminal-keyboard-toggle\""
 type "printf '__AD_%s__\\n' OUTPUT_OK" --delay-ms 0
@@ -2,9 +2,9 @@ context platform=ios timeout=60000 retries=1
 env APP_ID=sh.paseo.debug

 open "${APP_ID}"
-wait "id=\"workspace-header-menu-trigger\"" 20000
-press "id=\"workspace-header-menu-trigger\""
-press "id=\"workspace-header-new-terminal\""
+wait "id=\"workspace-tab-switcher-trigger\"" 20000
+press "id=\"workspace-tab-switcher-trigger\""
+press "id=\"workspace-tab-switcher-new-terminal\""
 wait "id=\"terminal-surface\"" 10000
 press "id=\"terminal-surface\""
 type "clear; yes SAME | head -41; echo AD_SCROLL_MARKER; yes SAME | head -38" --delay-ms 0
@@ -2,9 +2,9 @@ context platform=ios timeout=60000 retries=1
 env APP_ID=sh.paseo.debug

 open "${APP_ID}"
-wait "id=\"workspace-header-menu-trigger\"" 20000
-press "id=\"workspace-header-menu-trigger\""
-press "id=\"workspace-header-new-terminal\""
+wait "id=\"workspace-tab-switcher-trigger\"" 20000
+press "id=\"workspace-tab-switcher-trigger\""
+press "id=\"workspace-tab-switcher-new-terminal\""
 wait "id=\"terminal-keyboard-toggle\"" 10000
 press "id=\"terminal-keyboard-toggle\""
 type "clear; printf '                    PASEO_TARGET\\n'" --delay-ms 0
@@ -660,9 +660,9 @@ adb shell am start -a android.intent.action.VIEW -d "paseo://h/${SERVER_ID}/agen
 ad wait "text=\"${AGENT_TITLE}\"" 10000
 run_host_scenario chat
 ad keyboard dismiss || true
-ad press 'id="workspace-header-menu-trigger"' --settle
-ad wait 'id="workspace-header-new-agent"' 10000
-ad press 'id="workspace-header-new-agent"' --settle
+ad press 'id="workspace-tab-switcher-trigger"' --settle
+ad wait 'id="workspace-tab-switcher-new-agent"' 10000
+ad press 'id="workspace-tab-switcher-new-agent"' --settle
 ad wait 'text="New Agent"' 10000
 run_host_scenario workspace-draft
 ad keyboard dismiss || true
@@ -0,0 +1,43 @@
+// Start on Settings > Host > Pair device with relay enabled in the Android app.
+// node packages/app/e2e/mobile/pair-device/android.mjs <agent-device-session>
+import assert from "node:assert/strict";
+import { execFileSync } from "node:child_process";
+
+const [, , session] = process.argv;
+assert(session, "Pass the agent-device session for the connected Android app");
+
+function ad(...args) {
+  return execFileSync("agent-device", [...args, "--session", session], {
+    encoding: "utf8",
+    timeout: 60_000,
+  });
+}
+
+ad(
+  "press",
+  'label="Pair a device, Scan a QR code or copy a link to connect your phone to this host"',
+  "--settle",
+);
+ad("wait", "text", "Pairing QR code", "10000");
+const { data } = JSON.parse(ad("snapshot", "-i", "--json"));
+const sheet = data.nodes.find((node) => node.label === "Bottom Sheet");
+const qr = data.nodes.find((node) => node.label === "Pairing QR code");
+assert(sheet?.rect, "Pairing sheet must be visible");
+assert(qr?.rect, "Pairing QR code must be visible");
+assert(qr.rect.x > sheet.rect.x, "QR must have an unclipped left margin inside the sheet");
+assert(
+  qr.rect.x + qr.rect.width < sheet.rect.x + sheet.rect.width,
+  "QR must have an unclipped right margin inside the sheet",
+);
+assert(Math.abs(qr.rect.width - qr.rect.height) <= 1, "Complete QR must remain square");
+assert(qr.rect.y >= sheet.rect.y, "QR top must be visible inside the sheet");
+assert(
+  qr.rect.y + qr.rect.height <= sheet.rect.y + sheet.rect.height,
+  "QR bottom must be visible inside the sheet",
+);
+assert(
+  data.nodes.some((node) => node.label === "Copy" && node.enabled),
+  "Copy must remain available",
+);
+console.log("PASS: complete square QR fits inside the pairing sheet", qr.rect);
+ad("press", 'label="Close"', "--settle");
@@ -0,0 +1,62 @@
+// Open Settings > Appearance in a native Android app loaded from this checkout.
+// AGENT_DEVICE_STATE_DIR=<state-dir> node packages/app/e2e/mobile/system-bars/android.mjs <session> <adb-serial> <app-id>
+// Requires English UI and a dedicated emulator. Leaves System theme and light OS appearance.
+import assert from "node:assert/strict";
+import { execFileSync } from "node:child_process";
+import { setTimeout as delay } from "node:timers/promises";
+
+const [, , session, serial, appId] = process.argv;
+assert(session && serial && appId, "Pass the agent-device session, adb serial, and app ID");
+
+function ad(...args) {
+  return execFileSync("agent-device", [...args, "--session", session], {
+    encoding: "utf8",
+    timeout: 60_000,
+  });
+}
+
+function windowState() {
+  const state = execFileSync("adb", ["-s", serial, "shell", "dumpsys", "window"], {
+    encoding: "utf8",
+    timeout: 10_000,
+  });
+  assert(state.match(/mCurrentFocus=.*\n/)?.[0].includes(`${appId}/`), "App must be focused");
+  const regions = state.match(/mLastStatusBarAppearanceRegions=\s*\n([^\n]+)/)?.[1];
+  assert(regions, "Android must report the status-bar appearance region");
+  return regions.includes("LIGHT_STATUS_BARS");
+}
+
+async function expectDarkIcons(expected, context) {
+  const deadline = Date.now() + 5_000;
+  do {
+    if (windowState() === expected) {
+      console.log(`PASS: ${context}`);
+      return;
+    }
+    await delay(100);
+  } while (Date.now() < deadline);
+  assert.equal(windowState(), expected, context);
+}
+
+function selectTheme(theme) {
+  const current = ad("snapshot", "-i").match(/"Theme: ([^"]+)"/)?.[1];
+  assert(current, "Start on Settings > Appearance");
+  ad("press", `label="Theme: ${current}"`, "--settle");
+  ad("press", `label="${theme}"`, "--settle");
+  ad("wait", "text", `Theme: ${theme}`, "5000");
+}
+
+ad("settings", "appearance", "light");
+selectTheme("Light");
+await expectDarkIcons(true, "Light app theme uses dark status icons");
+selectTheme("Dark");
+await expectDarkIcons(false, "Dark app theme uses light status icons");
+selectTheme("System");
+await expectDarkIcons(true, "System theme starts with dark icons on light OS appearance");
+ad("settings", "appearance", "dark");
+await expectDarkIcons(
+  false,
+  "System theme follows an OS change to dark without reopening settings",
+);
+ad("settings", "appearance", "light");
+await expectDarkIcons(true, "System theme follows an OS change back to light");
@@ -87,10 +87,11 @@ export async function emitSettledAssistantImage(
  client: SeedDaemonClient,
  agent: ArchiveTabAgent,
  image: AssistantImageFixture,
+  destination: string = image.relativePath,
 ): Promise<void> {
  await client.sendAgentMessage(
    agent.id,
-    `Emit settled assistant image Markdown: ![${image.alt}](${image.relativePath})`,
+    `Emit settled assistant image Markdown: ![${image.alt}](${destination})`,
  );
  const result = await client.waitForFinish(agent.id, 30_000);
  if (result.status !== "idle" || result.final?.lastError) {
@@ -56,6 +56,12 @@ export async function expectComposerNotFocused(page: Page): Promise<void> {
  await expect(composerInput(page)).not.toBeFocused();
 }

+/** Blur the editor without anything else taking focus. */
+export async function blurComposerInput(page: Page): Promise<void> {
+  await composerInput(page).blur();
+  await expectComposerNotFocused(page);
+}
+
 export async function submitMessage(page: Page, text: string): Promise<void> {
  const input = composerInput(page);
  await expect(input).toBeEditable({ timeout: 30_000 });
@@ -316,3 +322,182 @@ export async function openGithubWorkspace(
    },
  };
 }
+
+const COMPOSER_TEST_IMAGE_BASE64 =
+  "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg==";
+
+export async function attachComposerTestImage(page: Page): Promise<void> {
+  await attachImageFromMenu(page, {
+    name: "fullscreen.png",
+    mimeType: "image/png",
+    buffer: Buffer.from(COMPOSER_TEST_IMAGE_BASE64, "base64"),
+  });
+}
+
+export async function pasteComposerTestImage(page: Page): Promise<boolean> {
+  return composerInput(page).evaluate((input, base64) => {
+    const bytes = Uint8Array.from(atob(base64), (character) => character.charCodeAt(0));
+    const clipboardData = new DataTransfer();
+    clipboardData.items.add(new File([bytes], "pasted.png", { type: "image/png" }));
+    const event = new ClipboardEvent("paste", { clipboardData, bubbles: true, cancelable: true });
+    input.dispatchEvent(event);
+    return event.defaultPrevented;
+  }, COMPOSER_TEST_IMAGE_BASE64);
+}
+
+export async function enterComposerFullscreen(page: Page): Promise<void> {
+  await page.getByRole("button", { name: "Fullscreen", exact: true }).click();
+}
+export async function exitComposerFullscreen(page: Page): Promise<void> {
+  await page.getByRole("button", { name: "Exit fullscreen", exact: true }).click();
+}
+export async function resizeComposerViewport(
+  page: Page,
+  orientation: "portrait" | "landscape" | "short",
+): Promise<void> {
+  const sizes = {
+    portrait: { width: 390, height: 844 },
+    landscape: { width: 844, height: 390 },
+    short: { width: 390, height: 390 },
+  };
+  await page.setViewportSize(sizes[orientation]);
+  // Before the app has loaded there is no layout to wait for.
+  if (page.url() === "about:blank") return;
+  // Crossing the compact breakpoint remounts the shell and the editor. Anything that
+  // follows (a shortcut, a locator) belongs to the layout the new size implies, so
+  // wait for that layout before returning.
+  await expect(page.getByTestId("compact-shell")).toHaveCount(orientation === "landscape" ? 0 : 1);
+}
+export async function selectComposerDraftRange(
+  page: Page,
+  start: number,
+  end: number,
+): Promise<void> {
+  await composerInput(page).focus();
+  await composerInput(page).evaluate(
+    (element, selection) => {
+      const input = element as HTMLTextAreaElement;
+      input.setSelectionRange(selection.start, selection.end);
+      input.dispatchEvent(new Event("select", { bubbles: true }));
+    },
+    { start, end },
+  );
+}
+export async function expectComposerDraftSelection(
+  page: Page,
+  start: number,
+  end: number,
+): Promise<void> {
+  await expect
+    .poll(() =>
+      composerInput(page).evaluate((element) => {
+        const input = element as HTMLTextAreaElement;
+        return [input.selectionStart, input.selectionEnd];
+      }),
+    )
+    .toEqual([start, end]);
+}
+export async function expectComposerFullscreenControls(page: Page): Promise<void> {
+  await expect(page.getByRole("button", { name: "Exit fullscreen", exact: true })).toBeVisible();
+  await expect(page.getByTestId("composer-fullscreen").getByRole("button")).toHaveCount(2);
+  await expect(composerInput(page)).toHaveCount(1);
+}
+/** The fullscreen frame and its submit button sit inside the browser's visible viewport. */
+export async function expectComposerFullscreenFitsVisibleViewport(
+  page: Page,
+  submitLabel = "Send message",
+): Promise<void> {
+  await expect
+    .poll(() =>
+      page.getByTestId("composer-fullscreen").evaluate((element, label) => {
+        const viewport = window.visualViewport!;
+        const frame = element.getBoundingClientRect();
+        const send = element.querySelector(`[aria-label="${label}"]`)!.getBoundingClientRect();
+        return {
+          frameFits:
+            Math.abs(frame.top - viewport.offsetTop) < 1 &&
+            Math.abs(frame.left - viewport.offsetLeft) < 1 &&
+            Math.abs(frame.height - viewport.height) < 1 &&
+            Math.abs(frame.width - viewport.width) < 1,
+          sendFits:
+            send.top >= viewport.offsetTop &&
+            send.bottom <= viewport.offsetTop + viewport.height &&
+            send.left >= viewport.offsetLeft &&
+            send.right <= viewport.offsetLeft + viewport.width,
+        };
+      }, submitLabel),
+    )
+    .toEqual({ frameFits: true, sendFits: true });
+}
+export async function sendComposerWithButton(page: Page): Promise<void> {
+  await page.getByRole("button", { name: "Send message", exact: true }).click();
+}
+export async function queueComposerWithButton(page: Page): Promise<void> {
+  await page.getByRole("button", { name: "Queue message", exact: true }).click();
+}
+export async function configureComposerQueueSend(page: Page): Promise<void> {
+  await page.addInitScript(() =>
+    localStorage.setItem("@paseo:app-settings", JSON.stringify({ sendBehavior: "queue" })),
+  );
+}
+
+/** Drive the real tab chooser's commands even when fullscreen covers its pointer surface.
+ * This exercises retained activity changes, not a claim that covered chrome is clickable.
+ */
+/** Needs a desktop-width viewport: compact layouts have no keyboard shortcuts. */
+export async function switchComposerTabWithKeyboard(
+  page: Page,
+  direction: "previous" | "next",
+): Promise<void> {
+  await page.keyboard.press(
+    direction === "previous" ? "Alt+Shift+BracketLeft" : "Alt+Shift+BracketRight",
+  );
+}
+export async function expectWorkspaceHeaderHidden(page: Page): Promise<void> {
+  await expect(page.getByTestId("workspace-tab-switcher-trigger")).toHaveCount(0);
+}
+export async function expectWorkspaceHeaderVisible(page: Page): Promise<void> {
+  await expect(page.getByTestId("workspace-tab-switcher-trigger")).toBeVisible();
+}
+
+export async function activateRetainedComposerTab(page: Page, title: string): Promise<void> {
+  await page
+    .getByTestId("workspace-tab-switcher-trigger")
+    .evaluate((element) => (element as HTMLElement).click());
+  const option = page.getByText(title, { exact: true }).filter({ visible: true }).last();
+  await expect(option).toBeVisible();
+  await option.evaluate((element) => (element as HTMLElement).click());
+}
+
+export async function recordVisibleComposerGeometry(page: Page): Promise<void> {
+  await page.evaluate(() => {
+    const frames: { input: number; root: number }[] = [];
+    Reflect.set(window, "__composerGeometryFrames", frames);
+    let running = true;
+    const tick = () => {
+      if (!running) return;
+      for (const root of document.querySelectorAll('[data-testid="message-input-root"]')) {
+        if (root.getClientRects().length === 0) continue;
+        const input = root.querySelector("textarea");
+        if (input)
+          frames.push({
+            input: input.getBoundingClientRect().height,
+            root: root.getBoundingClientRect().height,
+          });
+      }
+      requestAnimationFrame(tick);
+    };
+    requestAnimationFrame(tick);
+    Reflect.set(window, "__stopComposerGeometry", () => {
+      running = false;
+    });
+  });
+}
+export async function expectNoCollapsedVisibleComposer(page: Page): Promise<void> {
+  const frames = await page.evaluate(() => {
+    Reflect.get(window, "__stopComposerGeometry")?.();
+    return Reflect.get(window, "__composerGeometryFrames") as { input: number; root: number }[];
+  });
+  expect(frames.length).toBeGreaterThan(0);
+  expect(frames.filter((frame) => frame.root < 42 || frame.input < 42)).toEqual([]);
+}
@@ -0,0 +1,37 @@
+import { expect, type Page } from "@playwright/test";
+import { gotoAppShell, openSettings } from "./app";
+import { openSettingsHostSection } from "./settings";
+import { getServerId } from "./server-id";
+
+export async function openCustomModels(page: Page): Promise<void> {
+  await gotoAppShell(page);
+  await openSettings(page);
+  await openSettingsHostSection(page, getServerId(), "providers");
+  await page.getByRole("button", { name: "Claude provider details", exact: true }).click();
+  await expect(page.getByRole("textbox", { name: "Search models" })).toBeVisible();
+}
+
+export async function addCustomModel(page: Page, id: string): Promise<void> {
+  await page.getByRole("button", { name: "Add model", exact: true }).click();
+  await page.getByPlaceholder("e.g. openai/gpt-5").fill(id);
+  await page
+    .getByTestId("add-custom-model-sheet")
+    .getByRole("button", { name: "Add", exact: true })
+    .click();
+  await expect(page.getByRole("button", { name: `Remove ${id}`, exact: true })).toHaveCount(1);
+}
+
+export async function removeCustomModel(page: Page, id: string): Promise<void> {
+  await page.getByRole("textbox", { name: "Search models" }).fill(id);
+  const remove = page.getByRole("button", { name: `Remove ${id}`, exact: true });
+  await expect(remove).toBeInViewport({ ratio: 1 });
+  await remove.click();
+  await expect(remove).toHaveCount(0);
+}
+
+export async function expectCustomModelRetained(page: Page, id: string): Promise<void> {
+  await page.getByRole("textbox", { name: "Search models" }).fill(id);
+  await expect(page.getByRole("button", { name: `Remove ${id}`, exact: true })).toBeInViewport({
+    ratio: 1,
+  });
+}
@@ -1,4 +1,4 @@
-import { expect, type Page } from "@playwright/test";
+import { expect, type Download, type Page } from "@playwright/test";
 import { openFilesPanel } from "./workspace-tabs";

 function fileExplorerTree(page: Page) {
@@ -39,3 +39,10 @@ export async function expectFileTabOpen(page: Page, filePath: string): Promise<v
    timeout: 30_000,
  });
 }
+
+export async function downloadFileFromExplorer(page: Page, fileName: string): Promise<Download> {
+  await fileExplorerEntry(page, fileName).click({ button: "right" });
+  const downloaded = page.waitForEvent("download");
+  await page.getByRole("menuitem", { name: "Download", exact: true }).click();
+  return downloaded;
+}
@@ -220,3 +220,24 @@ export function expectDaemonPidUnchanged(
  expect(before).toBeDefined();
  expect(after).toBe(before);
 }
+
+export async function expectCompletePairingQr(page: Page): Promise<void> {
+  const qr = page.getByRole("img", { name: "Pairing QR code" });
+  await qr.scrollIntoViewIfNeeded();
+  // IntersectionObserver rounds fractional sheet/scroll coordinates.
+  await expect(qr).toBeInViewport({ ratio: 0.999 });
+  const bounds = await qr.evaluate((element) => {
+    const tile = element.parentElement;
+    if (!tile) throw new Error("Pairing QR tile is missing");
+    const qrRect = element.getBoundingClientRect();
+    const tileRect = tile.getBoundingClientRect();
+    return {
+      qr: { x: qrRect.x, y: qrRect.y, right: qrRect.right, bottom: qrRect.bottom },
+      tile: { x: tileRect.x, y: tileRect.y, right: tileRect.right, bottom: tileRect.bottom },
+    };
+  });
+  expect(bounds.qr.x).toBeGreaterThanOrEqual(bounds.tile.x);
+  expect(bounds.qr.y).toBeGreaterThanOrEqual(bounds.tile.y);
+  expect(bounds.qr.right).toBeLessThanOrEqual(bounds.tile.right);
+  expect(bounds.qr.bottom).toBeLessThanOrEqual(bounds.tile.bottom);
+}
@@ -30,7 +30,6 @@ async function capture(
  name: string,
  subject: Locator = headerButtons(page),
 ) {
-  await expect(headerButtons(page)).toHaveCount(1);
  await expect(subject).toBeInViewport();
  await waitForSettledPosition(subject);
  const file = info.outputPath(`${name}.png`);
@@ -80,6 +79,7 @@ export async function withButtonAuthorExample(
      refreshFromHeaderAndComposer: () =>
        test.step("icon-only header action and labeled composer action update in place", async () => {
          await exampleCommand(page, "action");
+          await expect(headerButtons(page)).toHaveCount(1);
          await headerButtons(page).click();
          await expect(headerButtons(page)).toHaveAccessibleName("Refresh workspace (1)");
          await page.getByRole("button", { name: "Refresh context", exact: true }).click();
@@ -88,7 +88,13 @@ export async function withButtonAuthorExample(
          ).toContainText("Refreshed · 2");
          await capture(page, info, "01-actions");
          await page.setViewportSize(COMPACT);
-          await capture(page, info, "02-compact-actions");
+          await expect(headerButtons(page)).toHaveCount(0);
+          await capture(
+            page,
+            info,
+            "02-compact-actions",
+            page.getByRole("button", { name: "Refresh context", exact: true }),
+          );
        }),
      useMenusAndToggleButtons: () =>
        test.step("named menus include separators, nested actions, disabled items, and custom content", async () => {
@@ -128,7 +134,8 @@ export async function withButtonAuthorExample(
          await capture(page, info, "05-disabled");
          await exampleCommand(page, "enable");
          await page.setViewportSize(COMPACT);
-          await headerButtons(page).click();
+          await expect(headerButtons(page)).toHaveCount(0);
+          await page.getByRole("button", { name: "Composer tools", exact: true }).click();
          await expect(
            page.getByRole("menuitem", { name: "Refresh workspace", exact: true }),
          ).toBeInViewport();
@@ -143,6 +150,7 @@ export async function withButtonAuthorExample(
      inspectLiveWorkspaceDetails: () =>
        test.step("custom icons and content react to workspace changes and adapt to sheets", async () => {
          await exampleCommand(page, "popover");
+          await expect(headerButtons(page)).toHaveCount(1);
          await headerButtons(page).click();
          await expect(
            page.getByRole("button", { name: "Close workspace details", exact: true }),
@@ -202,31 +202,6 @@ async function expectHeaderTextTruncated(page: Page) {
  await expect.poll(async () => (await hostIcon.boundingBox())?.width).toBe(12);
 }

-async function holdButton(page: Page, button: Locator) {
-  await button.hover();
-  await page.mouse.down();
-}
-
-async function openCompactOverflowWithHeaderChrome(page: Page) {
-  const hamburger = page.getByRole("button", { name: "Open menu", exact: true });
-  const action = page.getByRole("button", { name: "Deploy application", exact: true });
-  const overflow = page
-    .getByRole("toolbar", { name: "Workspace actions", exact: true })
-    .getByRole("button", { name: "More actions", exact: true });
-  await expect(action).toHaveCSS("border-top-width", "0px");
-  await expect(overflow).toHaveCSS("border-top-width", "0px");
-  await hamburger.hover();
-  const highlight = await hamburger.evaluate(
-    (element) => getComputedStyle(element).backgroundColor,
-  );
-  await action.hover();
-  await expect(action).toHaveCSS("background-color", highlight);
-  await holdButton(page, overflow);
-  await expect(overflow).toHaveCSS("background-color", highlight);
-  await expectSurfaceVisible(page);
-  await page.mouse.up();
-}
-
 export async function withButtonShowcase(
  page: Page,
  run: (buttons: {
@@ -408,7 +383,7 @@ export async function withButtonShowcase(
          );
        }),
      openCompactSheets: () =>
-        test.step("compact triggers and overflow open sheets with working plugin context", async () => {
+        test.step("compact header omits plugin actions while composer triggers open sheets", async () => {
          await page.setViewportSize(COMPACT);
          await expect(page.getByTestId("plugin-button-chevron")).toHaveCount(0);
          await expect(
@@ -426,39 +401,12 @@ export async function withButtonShowcase(
            "Button showcase with a long workspace title",
          );
          await expectHeaderTextTruncated(page);
-          await expectSurfaceVisible(page);
-          await openCompactOverflowWithHeaderChrome(page);
          await expect(
-            page.getByRole("menuitem", { name: "Production locked", exact: true }),
-          ).toBeDisabled();
-          await expectSurfaceVisible(
-            page,
-            page.getByRole("menuitem", { name: "Production locked", exact: true }),
-          );
-          await choose(page, "Header checks");
-          await expectSurfaceVisible(
-            page,
-            page.getByRole("menuitem", { name: "Run checks", exact: true }),
-          );
-          await choose(page, "Deployment details");
-          await expectDetails(page);
-          await expectSurfaceVisible(
-            page,
-            page.getByRole("button", { name: "Close deployment details", exact: true }),
-          );
-          await press(page, "Close deployment details");
-          await showcase.setTitle("Compact checks");
-          await press(page, "Header checks");
-          await expect(
-            page
-              .getByRole("button", { name: "Header checks", exact: true })
-              .getByTestId("plugin-button-chevron"),
+            page.getByRole("toolbar", { name: "Workspace actions", exact: true }),
          ).toHaveCount(0);
-          await expectSurfaceVisible(
-            page,
-            page.getByRole("menuitem", { name: "Run checks", exact: true }),
-          );
-          await choose(page, "Run checks");
+          await expect(
+            page.getByRole("button", { name: "Open menu", exact: true }),
+          ).toBeInViewport();
          await showcase.setTitle("Button showcase");
          await press(page, "Composer status");
          await expectDetails(page);
@@ -47,6 +47,65 @@ export default function contribute(client) {
  return () => {};
 }`;

+const PROMPT_PLUGIN_ID = "timeline-prompt-e2e";
+
+function promptClientSource(prompts?: readonly string[]): string {
+  return `import React from "react";
+import { Text, View } from "react-native";
+import { z } from "zod";
+
+const selectedPrompts = ${JSON.stringify(prompts ?? null)};
+
+function PromptCard({ item }) {
+  return <View testID="plugin-prompt"><Text>{item.data.text}</Text></View>;
+}
+
+export default function contribute(client) {
+  client.addTimelineTransformer({
+    id: "prompt",
+    query: { itemType: "user_message" },
+    transform({ item }) {
+      if (selectedPrompts && !selectedPrompts.includes(item.text)) return undefined;
+      return { items: [{ type: "plugin", kind: "prompt", version: 1, data: { text: item.text } }] };
+    },
+  });
+  client.addTimelineRenderer({
+    kind: "prompt", version: 1,
+    schema: z.object({ text: z.string() }),
+    Component: PromptCard,
+  });
+  return () => {};
+}`;
+}
+
+async function withDirectoryPlugin(options: {
+  pluginId: string;
+  source: string;
+  run: () => Promise<void>;
+}): Promise<void> {
+  const { pluginId, source, run } = options;
+  const directory = await mkdtemp(path.join(tmpdir(), "paseo-timeline-plugin-"));
+  const pluginClient = await connectNewWorkspaceDaemonClient({ ownProjects: false });
+  const previous = await pluginClient.getDaemonConfig();
+  try {
+    await writeFile(
+      path.join(directory, "paseo-plugin.json"),
+      JSON.stringify({ id: pluginId, requirements: pluginRequirements }),
+    );
+    await writeFile(path.join(directory, "index.client.tsx"), source);
+    await pluginClient.patchDaemonConfig({ pluginsEnabled: true });
+    await pluginClient.installDirectoryPlugin(directory);
+    await run();
+  } finally {
+    await pluginClient.removePlugin(pluginId);
+    await pluginClient.patchDaemonConfig({
+      pluginsEnabled: previous.config.pluginsEnabled ?? false,
+    });
+    await pluginClient.close();
+    await rm(directory, { recursive: true, force: true });
+  }
+}
+
 export async function withTimelinePlugin(
  page: Page,
  info: TestInfo,
@@ -60,7 +119,6 @@ export async function withTimelinePlugin(
      JSON.stringify({ toolCallDetailLevel: "overview" }),
    );
  });
-  const directory = await mkdtemp(path.join(tmpdir(), "paseo-timeline-plugin-"));
  const agent = await seedMockAgentWorkspace({
    repoPrefix: "timeline-plugin-",
    title: "Timeline plugin regression",
@@ -73,40 +131,53 @@ export async function withTimelinePlugin(
          }
        : {},
  });
-  const pluginClient = await connectNewWorkspaceDaemonClient({ ownProjects: false });
-  const previous = await pluginClient.getDaemonConfig();
  try {
-    await writeFile(
-      path.join(directory, "paseo-plugin.json"),
-      JSON.stringify({ id: PLUGIN_ID, requirements: pluginRequirements }),
-    );
-    await writeFile(path.join(directory, "index.client.tsx"), CLIENT_SOURCE);
-    await pluginClient.patchDaemonConfig({ pluginsEnabled: true });
-    await pluginClient.installDirectoryPlugin(directory);
-    await openAgentRoute(page, agent);
-    await expect(page.getByRole("textbox", { name: "Message agent..." }).first()).toBeVisible();
-    await run(agent);
-    await info.attach("timeline-plugin", {
-      body: await page.screenshot({ path: info.outputPath("timeline-plugin.png") }),
-      contentType: "image/png",
+    await withDirectoryPlugin({
+      pluginId: PLUGIN_ID,
+      source: CLIENT_SOURCE,
+      run: async () => {
+        try {
+          await openAgentRoute(page, agent);
+          await expect(
+            page.getByRole("textbox", { name: "Message agent..." }).first(),
+          ).toBeVisible();
+          await run(agent);
+          await info.attach("timeline-plugin", {
+            body: await page.screenshot({ path: info.outputPath("timeline-plugin.png") }),
+            contentType: "image/png",
+          });
+        } catch (error) {
+          await info.attach("timeline-before-cleanup", {
+            body: await page.screenshot({ path: info.outputPath("timeline-before-cleanup.png") }),
+            contentType: "image/png",
+          });
+          throw error;
+        }
+      },
    });
-  } catch (error) {
-    await info.attach("timeline-before-cleanup", {
-      body: await page.screenshot({ path: info.outputPath("timeline-before-cleanup.png") }),
-      contentType: "image/png",
-    });
-    throw error;
  } finally {
-    await pluginClient.removePlugin(PLUGIN_ID);
-    await pluginClient.patchDaemonConfig({
-      pluginsEnabled: previous.config.pluginsEnabled ?? false,
-    });
-    await pluginClient.close();
    await agent.cleanup();
-    await rm(directory, { recursive: true, force: true });
  }
 }

+/** Draws all prompts, or only the selected prompts, as plugin cards. */
+export async function withPromptTimelinePlugin(
+  run: () => Promise<void>,
+  prompts?: readonly string[],
+): Promise<void> {
+  await withDirectoryPlugin({
+    pluginId: PROMPT_PLUGIN_ID,
+    source: promptClientSource(prompts),
+    run,
+  });
+}
+
+export async function expectPromptsDrawnByPlugin(page: Page): Promise<void> {
+  const timeline = page.locator('[data-testid="agent-chat-scroll"]:visible').first();
+  await expect(timeline.getByTestId("plugin-prompt").first()).toBeVisible({ timeout: 30_000 });
+  await expect(timeline.getByTestId("user-message")).toHaveCount(0);
+}
+
 export async function requestPluginTimeline(agent: MockAgentWorkspace): Promise<void> {
  await agent.client.sendAgentMessage(agent.agentId, "Exercise timeline transforms.");
 }
@@ -142,3 +213,21 @@ export async function expectBothConsecutiveTools(page: Page): Promise<void> {
  await grep.scrollIntoViewIfNeeded();
  await expect(grep).toBeVisible();
 }
+
+/** The row belongs to the virtualized history, not the always-mounted recent window. */
+export async function expectVirtualizedPluginPromptVisible(
+  page: Page,
+  prompt: string,
+): Promise<void> {
+  const timeline = page.locator('[data-testid="agent-chat-scroll"]:visible').first();
+  await expect(
+    timeline.locator("[data-index]").getByTestId("plugin-prompt").filter({ hasText: prompt }),
+  ).toBeVisible();
+}
+
+export async function attachPromptTimelineEvidence(page: Page, info: TestInfo): Promise<void> {
+  await info.attach("plugin-outline-jump", {
+    body: await page.screenshot({ path: info.outputPath("plugin-outline-jump.png") }),
+    contentType: "image/png",
+  });
+}
@@ -43,6 +43,15 @@ export async function expectQuestionOptionSelected(page: Page, option: string):
  await expect(questionOption(page, option)).toHaveAttribute("aria-checked", "true");
 }

+export async function expectQuestionOptionPreview(
+  page: Page,
+  input: { option: string; preview: string },
+): Promise<void> {
+  await expect(
+    questionOption(page, input.option).getByTestId("question-form-option-preview"),
+  ).toContainText(input.preview);
+}
+
 export async function openQuestion(
  page: Page,
  input: { index: number; total: number },
@@ -0,0 +1,99 @@
+import { expect, type Locator, type Page } from "@playwright/test";
+
+/** A sheet tab's body, named after the tab it shows. */
+export function sheet(page: Page, label: string): Locator {
+  return page.getByRole("dialog", { name: label });
+}
+
+/** A sheet tab's header, which carries its title, Close, and the Open as tab glyph. */
+export function sheetHeader(page: Page, label: string): Locator {
+  return page.getByTestId("sheet-tab-header").filter({ hasText: label });
+}
+
+/** Sheet height as a fraction of the viewport; mirrors the sheet tab's 92% snap point. */
+const SHEET_SNAP_FRACTION = 0.92;
+/** The header starts below the sheet's drag indicator, inside the handle. */
+const SHEET_INDICATOR_MAX_HEIGHT = 32;
+
+/**
+ * The sheet rests at its snap point, docked to the bottom edge. A sheet pushed up past it
+ * covers the workspace header; a sheet sunk below it hides content.
+ */
+export async function expectSheetAtSnap(page: Page, label: string): Promise<void> {
+  const viewportHeight = page.viewportSize()?.height ?? 0;
+  const snapTop = Math.round(viewportHeight * (1 - SHEET_SNAP_FRACTION));
+  const header = sheetHeader(page, label);
+  const body = sheet(page, label);
+  await expect
+    .poll(async () => {
+      const [headerBox, bodyBox] = await Promise.all([header.boundingBox(), body.boundingBox()]);
+      if (!headerBox || !bodyBox) return null;
+      const top = Math.round(headerBox.y);
+      return {
+        dockedToBottom: Math.round(bodyBox.y + bodyBox.height) === viewportHeight,
+        topAtSnap: top >= snapTop && top <= snapTop + SHEET_INDICATOR_MAX_HEIGHT,
+      };
+    })
+    .toEqual({ dockedToBottom: true, topAtSnap: true });
+}
+
+export async function expectOpenTabCount(page: Page, count: number): Promise<void> {
+  await expect(
+    page.getByRole("button", { name: `Switch tabs (${count} open)` }).filter({ visible: true }),
+  ).toBeVisible();
+}
+
+export async function closeSheet(page: Page, label: string): Promise<void> {
+  await sheetHeader(page, label).getByRole("button", { name: "Close" }).click();
+  await expect(sheet(page, label)).toHaveCount(0);
+}
+
+export async function openSheetAsTab(page: Page, label: string): Promise<void> {
+  await sheetHeader(page, label).getByRole("button", { name: "Open as tab" }).click();
+  await expect(sheet(page, label)).toHaveCount(0);
+}
+
+export async function replaceSheetFileText(
+  page: Page,
+  label: string,
+  content: string,
+): Promise<void> {
+  const editor = sheet(page, label).getByTestId("file-source-editor").locator(".cm-content");
+  await editor.click();
+  await editor.press("ControlOrMeta+A");
+  await editor.pressSequentially(content);
+}
+
+export async function selectTabFromSwitcher(page: Page, label: string): Promise<void> {
+  await page
+    .getByRole("button", { name: /Switch tabs/ })
+    .filter({ visible: true })
+    .click();
+  await expect(page.getByText("Workspace tabs", { exact: true })).toBeVisible();
+  const option = page.getByText(label, { exact: true }).filter({ visible: true }).last();
+  await expect(option).toBeVisible();
+  await option.click();
+  await expect(page.getByRole("button", { name: "Bottom sheet backdrop" })).toHaveCount(0);
+}
+
+/** Taps the top sheet's backdrop; each stacked sheet renders its own, top last. */
+export async function tapSheetBackdrop(page: Page): Promise<void> {
+  await page
+    .getByRole("button", { name: "Bottom sheet backdrop" })
+    .last()
+    .click({ position: { x: 10, y: 10 } });
+}
+
+/** Runs a close that hits the unsaved-changes guard, and declines the discard. */
+export async function expectDeclinedDiscardPrompt(
+  page: Page,
+  close: () => Promise<void>,
+): Promise<void> {
+  const prompt = page.waitForEvent("dialog").then(async (dialog) => {
+    const message = dialog.message();
+    await dialog.dismiss();
+    return message;
+  });
+  await close();
+  expect(await prompt).toContain("discard the draft");
+}
@@ -250,3 +250,41 @@ export async function expectMobileAgentSidebarVisible(page: Page): Promise<void>
 export async function expectMobileAgentSidebarHidden(page: Page): Promise<void> {
  await expect(page.getByTestId("sidebar-sessions")).not.toBeInViewport({ timeout: 5_000 });
 }
+
+/** Drag from the left edge: the only way to open the list while fullscreen hides the header. */
+export async function swipeOpenMobileAgentSidebar(page: Page): Promise<void> {
+  const viewport = page.viewportSize();
+  if (!viewport) throw new Error("viewport size is required");
+  const y = Math.round(viewport.height / 2);
+  await page.mouse.move(8, y);
+  await page.mouse.down();
+  await page.mouse.move(40, y, { steps: 4 });
+  await page.mouse.move(Math.round(viewport.width * 0.7), y, { steps: 12 });
+  await page.mouse.up();
+}
+
+/** Drag from the right edge to open the compact Explorer over the agent. */
+export async function swipeOpenMobileExplorer(page: Page): Promise<void> {
+  const viewport = page.viewportSize();
+  if (!viewport) throw new Error("viewport size is required");
+  const y = Math.round(viewport.height / 2);
+  await page.mouse.move(viewport.width - 8, y);
+  await page.mouse.down();
+  await page.mouse.move(viewport.width - 40, y, { steps: 4 });
+  await page.mouse.move(Math.round(viewport.width * 0.3), y, { steps: 12 });
+  await page.mouse.up();
+}
+
+export async function closeMobileExplorer(page: Page): Promise<void> {
+  const closeButton = page.getByTestId("explorer-close");
+  await expect(closeButton).toBeInViewport({ ratio: 1, timeout: 5_000 });
+  await closeButton.click();
+}
+
+export async function expectMobileExplorerVisible(page: Page): Promise<void> {
+  await expect(page.getByTestId("explorer-header")).toBeInViewport({ ratio: 1, timeout: 5_000 });
+}
+
+export async function expectMobileExplorerHidden(page: Page): Promise<void> {
+  await expect(page.getByTestId("explorer-header")).not.toBeInViewport({ timeout: 5_000 });
+}
@@ -49,31 +49,37 @@ export async function seedParentWithSubagent(
    modeId: "load-test",
    model: "ten-second-stream",
  });
-  const child = await workspace.client.createAgent({
-    provider: "mock",
-    cwd: workspace.repoPath,
-    workspaceId: workspace.workspaceId,
-    title: input.childTitle,
-    modeId: "load-test",
-    model: "ten-second-stream",
-    labels: {
-      [PARENT_AGENT_ID_LABEL]: parent.id,
-    },
-  });
+  const child = await seedSubagent(workspace, { parentId: parent.id, title: input.childTitle });

  return {
    parent: {
      id: parent.id,
      title: input.parentTitle,
    },
-    child: {
-      id: child.id,
-      title: input.childTitle,
-    },
+    child,
    workspaceId: workspace.workspaceId,
  };
 }

+/** Seeds an idle Paseo subagent of an existing agent in the same workspace. */
+export async function seedSubagent(
+  workspace: Pick<SeededWorkspace, "client" | "repoPath" | "workspaceId">,
+  input: { parentId: string; title: string },
+): Promise<{ id: string; title: string }> {
+  const child = await workspace.client.createAgent({
+    provider: "mock",
+    cwd: workspace.repoPath,
+    workspaceId: workspace.workspaceId,
+    title: input.title,
+    modeId: "load-test",
+    model: "ten-second-stream",
+    labels: {
+      [PARENT_AGENT_ID_LABEL]: input.parentId,
+    },
+  });
+  return { id: child.id, title: input.title };
+}
+
 export async function seedParentWithCrossWorkspaceSubagent(
  workspace: Pick<SeededWorkspace, "client" | "repoPath" | "workspaceId" | "projectId">,
  input: { parentTitle: string; childTitle: string },
@@ -141,6 +147,12 @@ export async function openSubagentsTrack(page: Page): Promise<void> {
  await expect(panel).toBeVisible({ timeout: 30_000 });
 }

+/** On compact the track opens as a sheet, which closes once a row is chosen. */
+export async function openSubagentFromCompactTrack(page: Page, childId: string): Promise<void> {
+  await page.getByTestId("subagents-track-header").click();
+  await page.getByTestId(`subagents-track-row-${childId}`).click();
+}
+
 export async function expectSubagentRowVisible(page: Page, childId: string): Promise<void> {
  await expect(page.getByTestId(`subagents-track-row-${childId}`)).toBeVisible({
    timeout: 30_000,
@@ -1,10 +1,6 @@
-// Polyfill crypto.randomUUID for React Native before any other imports
-import { polyfillCrypto } from "./src/polyfills/crypto";
-polyfillCrypto();
-
-// Polyfill screen.orientation for WebKitGTK desktop runtimes that lack the API.
-import { polyfillScreenOrientation } from "./src/polyfills/screen-orientation";
-polyfillScreenOrientation();
+// Install runtime polyfills before any other module evaluates. Keep this the first import.
+// oxlint-disable-next-line import/no-unassigned-import -- Polyfills install on import.
+import "./src/polyfills/install-early";

 // Configure Unistyles before Expo Router pulls in any components using StyleSheet.
 import "./src/styles/unistyles";
@@ -29,4 +29,15 @@ describe("formatThinkingOptionLabel", () => {
    expect(formatThinkingOptionLabel({ id: "think-hard", label: "think-hard" })).toBe("Think hard");
    expect(formatThinkingOptionLabel({ id: "xhigh", label: "XHigh" })).toBe("Extra high");
  });
+
+  it("preserves provider-supplied xhigh labels with extra detail", () => {
+    expect(formatThinkingOptionLabel({ id: "xhigh", label: "XHigh (56 | 8m)" })).toBe(
+      "X high (56 | 8m)",
+    );
+    expect(formatThinkingOptionLabel({ id: "xhigh", label: "XHigh (45 | 6m)" })).toBe(
+      "X high (45 | 6m)",
+    );
+    expect(formatThinkingOptionLabel({ id: "xhigh" })).toBe("Extra high");
+    expect(formatThinkingOptionLabel({ id: "xhigh", label: "Extra high" })).toBe("Extra high");
+  });
 });
@@ -34,10 +34,9 @@ export function formatAgentModeLabel(mode: ControlLabelInput): string {

 export function formatThinkingOptionLabel(option: ControlLabelInput): string {
  const rawLabel = (option.label ?? option.id).trim();
-  const compactId = option.id.replace(/[\s_-]+/g, "").toLowerCase();
  const compactLabel = rawLabel.replace(/[\s_-]+/g, "").toLowerCase();

-  if (compactId === "xhigh" || compactLabel === "xhigh") {
+  if (compactLabel === "xhigh" || compactLabel === "extrahigh") {
    return i18n.t("agentControls.thinking.extraHigh");
  }

@@ -11,7 +11,7 @@ import {
  type UserMessageItem,
 } from "@/types/stream";
 import { transformTimelineItem, type TimelineItemTransform } from "@/plugins/timeline/model";
-import { createStreamPresentation } from "./presentation";
+import { createStreamPresentation, getStreamItemMessageId } from "./presentation";
 import { buildAgentStreamRenderModel } from "./model";

 const runtime = {
@@ -29,7 +29,7 @@ const runtime = {
 } as unknown as PluginClientRuntime;

 function installProbe(
-  itemType: "assistant_message" | "tool_call" | "reasoning",
+  itemType: "user_message" | "assistant_message" | "tool_call" | "reasoning",
  condition = "true",
 ): InstalledPlugin {
  const clientBundle = `(function() {
@@ -160,6 +160,23 @@ describe("stream presentation through installed plugins", () => {
    },
  );

+  it("addresses a prompt a plugin replaced by the prompt's own id", () => {
+    const harness = streamHarness(installedTransform(installProbe("user_message")));
+    const rendered = rows(
+      harness.send({
+        type: "timeline",
+        provider: "claude",
+        item: { type: "user_message", messageId: "prompt-1", text: "Earlier prompt" },
+      }),
+    );
+    const source = rows(harness.source());
+
+    expect(source).toMatchObject([{ kind: "user_message", id: "prompt-1" }]);
+    expect(rendered).toMatchObject([{ kind: "plugin", id: "probe-plugin/prompt-1/0" }]);
+    // The chat outline jumps to the source id; the row it lands on is the plugin's.
+    expect(rendered.map(getStreamItemMessageId)).toEqual(["prompt-1"]);
+  });
+
  it("finishes one message before streaming a different message ID", () => {
    const harness = streamHarness(installedTransform(installProbe("assistant_message")));
    harness.send(assistant("First\n\nBody", "first"));
@@ -26,10 +26,14 @@ function retainItems(previous: StreamItem[], next: StreamItem[]): StreamItem[] {
 /**
 * The source message a display row belongs to. Every assistant message is split into
 * Markdown blocks, so an assistant row id never equals its message id; anything that
- * addresses a message — find, scroll-to-message, history reveal — asks for this.
+ * addresses a message — find, scroll-to-message, history reveal — asks for this. A
+ * plugin row a timeline transformer projected answers for the item it replaced, whose
+ * id is what the chat outline and find hold.
 */
 export function getStreamItemMessageId(item: StreamItem): string {
-  return item.kind === "assistant_message" ? (item.blockGroupId ?? item.id) : item.id;
+  if (item.kind === "assistant_message") return item.blockGroupId ?? item.id;
+  if (item.kind === "plugin") return item.sourceId ?? item.id;
+  return item.id;
 }

 /**
@@ -42,6 +42,7 @@ import {
  type HistoryStartPaginationInput,
  type HistoryStartPaginationTransition,
 } from "./history-start-pagination";
+import { useStreamTopOverlayInset } from "./top-overlay";
 import {
  createHistoryStartSettleScheduler,
  type HistoryStartSettleScheduler,
@@ -274,12 +275,20 @@ function NativeStreamViewport(props: StreamRenderInput & { strategy: StreamStrat
    Platform.OS === "android" && bottomAnchorController.mode === "sticky-bottom"
      ? undefined
      : DEFAULT_MAINTAIN_VISIBLE_CONTENT_POSITION;
+  const topOverlayInset = useStreamTopOverlayInset();
+  // The list is inverted, so its content's bottom padding is the visual top.
  const listContentContainerStyle = useMemo(
    () => [
      baseListContentContainerStyle,
-      { paddingBottom: streamKeyboardInset.contentContainerPaddingBottom },
+      {
+        paddingBottom: streamKeyboardInset.contentContainerPaddingBottom + topOverlayInset,
+      },
+    ],
+    [
+      baseListContentContainerStyle,
+      streamKeyboardInset.contentContainerPaddingBottom,
+      topOverlayInset,
    ],
-    [baseListContentContainerStyle, streamKeyboardInset.contentContainerPaddingBottom],
  );
  const listInsetProps = useMemo(
    () =>
@@ -0,0 +1,14 @@
+import { createContext, useContext } from "react";
+import { isNative } from "@/constants/platform";
+
+/** The native inverted viewport reserves visual-top clearance; web stays in flow. */
+export const supportsStreamTopOverlay = isNative;
+
+const StreamTopOverlayContext = createContext(0);
+
+/** Visual-top clearance supplied by the containing layout, in points. */
+export const StreamTopOverlayProvider = StreamTopOverlayContext.Provider;
+
+export function useStreamTopOverlayInset(): number {
+  return useContext(StreamTopOverlayContext);
+}
@@ -1,3 +1,4 @@
+import { ComposerEditingSessionsProvider } from "@/composer/editing-session";
 import "@/styles/unistyles";
 import { BottomSheetModalProvider } from "@gorhom/bottom-sheet";
 import { PortalProvider } from "@gorhom/portal";
@@ -35,7 +36,7 @@ import { ChangelogHost } from "@/changelog";
 import { AppDiagnosticHost } from "@/components/app-diagnostic-host";
 import { AppearanceStyleBoundary } from "@/components/appearance-style-boundary";
 import { LeftSidebar } from "@/components/left-sidebar";
-import { WindowSidebarMenuToggle } from "@/components/headers/menu-header";
+import { WindowSidebarMenuToggle } from "@/components/headers/sidebar-menu-toggle";
 import { DesktopWindowControls } from "@/components/desktop/window-controls";
 import { SidebarModelProvider } from "@/components/sidebar/sidebar-model";
 import { WorkspacePinShortcutHandler } from "@/components/workspace-pin-shortcut-handler";
@@ -102,7 +103,6 @@ import {
  useKeyboardActionDispatcher,
 } from "@/keyboard/keyboard-action-dispatcher-context";
 import { polyfillCrypto } from "@/polyfills/crypto";
-import { polyfillNavigator } from "@/polyfills/navigator";
 import {
  getHostRuntimeStore,
  hasConfiguredLocalDaemonOverride,
@@ -116,6 +116,7 @@ import { usePanelStore } from "@/stores/panel-store";
 import { flushDraftPersistStorage } from "@/stores/draft-store";
 import { getNextThemePreference, ICON_STROKE_WIDTH } from "@/styles/theme";
 import { useSessionStore } from "@/stores/session-store";
+import { WorkspaceLayoutModePublisher } from "@/workspace-tabs/layout-mode-publisher";
 import { installWebScrollbarStyles } from "@/styles/install-web-scrollbar-styles";
 import type { HostProfile } from "@/types/host-connection";
 import {
@@ -138,7 +139,6 @@ import {
  type WebNotificationClickDetail,
 } from "@/utils/os-notifications";

-polyfillNavigator();
 polyfillCrypto();

 export interface HostRuntimeBootstrapState {
@@ -550,6 +550,7 @@ function AppContainer({ children, chromeEnabled: chromeEnabledOverride }: AppCon
  }
  const workspaceChrome = (
    <View style={rowStyle}>
+      <WorkspaceLayoutModePublisher />
      {!isCompactLayout ? (
        <WindowChromeRegion corners={appChromeLayout.sidebarCorners}>
          {themedSidebarChrome}
@@ -625,7 +626,11 @@ function AppContainer({ children, chromeEnabled: chromeEnabledOverride }: AppCon
    surface
  );

-  return <CommandCenterProvider>{content}</CommandCenterProvider>;
+  return (
+    <ComposerEditingSessionsProvider>
+      <CommandCenterProvider>{content}</CommandCenterProvider>
+    </ComposerEditingSessionsProvider>
+  );
 }

 function SidebarChrome({
@@ -660,7 +665,7 @@ function MobileGestureWrapper({

  return (
    <GestureDetector gesture={openGesture} touchAction={MOBILE_WEB_GESTURE_TOUCH_ACTION}>
-      <View collapsable={false} style={layoutStyles.surfaceFill}>
+      <View collapsable={false} style={layoutStyles.surfaceFill} testID="compact-shell">
        {children}
      </View>
    </GestureDetector>
@@ -1,6 +1,15 @@
 import { useLocalSearchParams } from "expo-router";
+import { useMemo } from "react";
 import { HostRouteBootstrapBoundary } from "@/components/host-route-bootstrap-boundary";
+import {
+  ComposerEditingScope,
+  WorkspaceComposerEditingSessionsProvider,
+} from "@/composer/editing-session";
 import { NewWorkspaceScreen } from "@/screens/new-workspace-screen";
+import { buildNewWorkspaceDraftKey } from "@/stores/draft-keys";
+
+/** New workspace drafts share one editing-session home, keyed like a tab by draft. */
+const NEW_WORKSPACE_SESSIONS_KEY = "new-workspace";

 export default function NewWorkspaceRoute() {
  const params = useLocalSearchParams<{
@@ -23,16 +32,28 @@ export default function NewWorkspaceRoute() {
    draftId ?? null,
  ]);

+  // The shell remounts this route when the viewport crosses the compact breakpoint;
+  // the draft's editing session (fullscreen, retained caret) lives above the shell.
+  const draftKey = buildNewWorkspaceDraftKey(draftId);
+  const sessionTabIds = useMemo(() => [draftKey], [draftKey]);
+
  return (
    <HostRouteBootstrapBoundary>
-      <NewWorkspaceScreen
-        key={screenKey}
-        serverId={serverId}
-        sourceDirectory={sourceDirectory}
-        displayName={displayName}
-        projectId={projectId}
-        draftId={draftId}
-      />
+      <WorkspaceComposerEditingSessionsProvider
+        workspaceKey={NEW_WORKSPACE_SESSIONS_KEY}
+        tabIds={sessionTabIds}
+      >
+        <ComposerEditingScope tabId={draftKey} targetKey={draftKey}>
+          <NewWorkspaceScreen
+            key={screenKey}
+            serverId={serverId}
+            sourceDirectory={sourceDirectory}
+            displayName={displayName}
+            projectId={projectId}
+            draftId={draftId}
+          />
+        </ComposerEditingScope>
+      </WorkspaceComposerEditingSessionsProvider>
    </HostRouteBootstrapBoundary>
  );
 }
@@ -21,6 +21,7 @@ import {
 } from "@/plugins/themes";
 import { PLUGIN_THEME_NAMES, PLUGIN_THEME_PREFERENCE, THEME_TO_UNISTYLES } from "@/styles/theme";
 import { applyAppearance } from "./apply";
+import { AppearanceSystemBars } from "./system-bars";

 interface ContributedThemes {
  options: PluginThemeOption[];
@@ -107,7 +108,10 @@ export function AppearanceProvider({ children }: { children: ReactNode }) {
  if (!hasAppliedAppearance) return null;

  return (
-    <ContributedThemesContext.Provider value={value}>{children}</ContributedThemesContext.Provider>
+    <ContributedThemesContext.Provider value={value}>
+      <AppearanceSystemBars />
+      {children}
+    </ContributedThemesContext.Provider>
  );
 }

@@ -0,0 +1,11 @@
+import { SystemBars } from "react-native-edge-to-edge";
+import { withUnistyles } from "react-native-unistyles";
+import type { Theme } from "@/styles/theme";
+
+function ThemeSystemBars({ colorScheme }: Pick<Theme, "colorScheme">) {
+  return <SystemBars style={colorScheme === "light" ? "dark" : "light"} />;
+}
+
+export const AppearanceSystemBars = withUnistyles(ThemeSystemBars, (theme) => ({
+  colorScheme: theme.colorScheme,
+}));
@@ -0,0 +1,3 @@
+export function AppearanceSystemBars() {
+  return null;
+}
@@ -417,6 +417,128 @@ describe("parseAssistantFileLink", () => {
    }
    expect(() => parseFileProtocolUrl("file:///tmp/100% packet loss")).not.toThrow();
  });
+
+  it("decodes percent-encoded relative markdown hrefs", () => {
+    // markdown-it percent-encodes non-ASCII characters in hrefs, so a link
+    // written as [x](docs/reports/开户赠金.md) arrives here percent-encoded.
+    expect(
+      parseAssistantFileLink("docs/reports/%E5%BC%80%E6%88%B7%E8%B5%A0%E9%87%91.md", {
+        workspaceRoot: "/Users/test/project",
+        decodeHref: true,
+      }),
+    ).toEqual({
+      raw: "docs/reports/%E5%BC%80%E6%88%B7%E8%B5%A0%E9%87%91.md",
+      path: "/Users/test/project/docs/reports/开户赠金.md",
+      lineStart: undefined,
+      lineEnd: undefined,
+    });
+  });
+
+  it("decodes percent-encoded spaces in relative markdown hrefs", () => {
+    expect(
+      parseAssistantFileLink("docs/my%20file.md#L5", {
+        workspaceRoot: "/Users/test/project",
+        decodeHref: true,
+      }),
+    ).toEqual({
+      raw: "docs/my%20file.md#L5",
+      path: "/Users/test/project/docs/my file.md",
+      lineStart: 5,
+      lineEnd: undefined,
+    });
+  });
+
+  it("decodes percent-encoded absolute hrefs with line suffixes", () => {
+    expect(
+      parseAssistantFileLink("/tmp/%E5%BC%80%E6%88%B7.md:3", {
+        workspaceRoot: "/Users/test/project",
+        decodeHref: true,
+      }),
+    ).toEqual({
+      raw: "/tmp/%E5%BC%80%E6%88%B7.md:3",
+      path: "/tmp/开户.md",
+      lineStart: 3,
+      lineEnd: undefined,
+    });
+  });
+
+  it("decodes percent-encoded home-relative hrefs", () => {
+    expect(
+      parseAssistantFileLink("~/notes/%E5%BC%80%E6%88%B7.md", {
+        workspaceRoot: "/Users/test/project",
+        decodeHref: true,
+      }),
+    ).toEqual({
+      raw: "~/notes/%E5%BC%80%E6%88%B7.md",
+      path: "~/notes/开户.md",
+      lineStart: undefined,
+      lineEnd: undefined,
+    });
+  });
+
+  it("decodes percent-encoded Windows hrefs", () => {
+    expect(
+      parseAssistantFileLink("C:/repo/my%20dir/app.tsx#L8", {
+        workspaceRoot: "C:/repo",
+        decodeHref: true,
+      }),
+    ).toEqual({
+      raw: "C:/repo/my%20dir/app.tsx#L8",
+      path: "C:/repo/my dir/app.tsx",
+      lineStart: 8,
+      lineEnd: undefined,
+    });
+  });
+
+  it("keeps literal percent signs in raw paths that are not hrefs", () => {
+    // Inline-code and linkified tokens are raw file paths: a real file named
+    // "my%20file.md" must not be decoded into "my file.md".
+    expect(
+      parseAssistantFileLink("docs/my%20file.md", {
+        workspaceRoot: "/Users/test/project",
+      }),
+    ).toEqual({
+      raw: "docs/my%20file.md",
+      path: "/Users/test/project/docs/my%20file.md",
+      lineStart: undefined,
+      lineEnd: undefined,
+    });
+    expect(
+      parseAssistantFileLink("/tmp/my%20file.md:3", {
+        workspaceRoot: "/Users/test/project",
+      }),
+    ).toEqual({
+      raw: "/tmp/my%20file.md:3",
+      path: "/tmp/my%20file.md",
+      lineStart: 3,
+      lineEnd: undefined,
+    });
+  });
+
+  it("keeps non-ASCII characters in raw absolute paths", () => {
+    // `new URL` percent-encodes non-ASCII, so raw paths must not be routed
+    // through URL parsing — `/tmp/开户.md` must round-trip unchanged.
+    expect(
+      parseAssistantFileLink("/tmp/开户.md", {
+        workspaceRoot: "/Users/test/project",
+      }),
+    ).toEqual({
+      raw: "/tmp/开户.md",
+      path: "/tmp/开户.md",
+      lineStart: undefined,
+      lineEnd: undefined,
+    });
+    expect(
+      parseAssistantFileLink("/tmp/开户.md#L4", {
+        workspaceRoot: "/Users/test/project",
+      }),
+    ).toEqual({
+      raw: "/tmp/开户.md#L4",
+      path: "/tmp/开户.md",
+      lineStart: 4,
+      lineEnd: undefined,
+    });
+  });
 });

 describe("normalizeInlinePathTarget", () => {
@@ -469,3 +591,23 @@ describe("normalizeInlinePathTarget", () => {
    });
  });
 });
+
+describe("encoded filename line markers", () => {
+  it.each(["docs/report.md%3A12", "docs/report.md%2812%2C4%29"])(
+    "keeps encoded line syntax in the filename %s",
+    (href) => {
+      expect(
+        parseAssistantFileLink(href, {
+          workspaceRoot: "/workspace",
+          decodeHref: true,
+        }),
+      ).toMatchObject({ path: `/workspace/${decodeURIComponent(href)}` });
+      expect(
+        parseAssistantFileLink(href, {
+          workspaceRoot: "/workspace",
+          decodeHref: true,
+        })?.lineStart,
+      ).toBeUndefined();
+    },
+  );
+});
@@ -80,6 +80,13 @@ const ASSISTANT_FILE_EXTENSIONS = new Set([

 export interface AssistantHrefParseOptions {
  workspaceRoot?: string;
+  /**
+   * True only when `value` is a markdown href — the renderer percent-encodes
+   * non-ASCII and space characters, so the path must be decoded. Raw path
+   * text (inline code, linkified tokens) is not encoded; decoding it would
+   * send a real file named `my%20file.md` to `my file.md`.
+   */
+  decodeHref?: boolean;
 }

 export type AssistantFileLinkClassification =
@@ -234,13 +241,20 @@ export function parseFileProtocolUrl(value: string): InlinePathTarget | null {
  };
 }

-function parseAssistantInlinePathLink(value: string): InlinePathTarget | null {
+function parseAssistantInlinePathLink(
+  value: string,
+  options: Pick<AssistantHrefParseOptions, "decodeHref"> = {},
+): InlinePathTarget | null {
  const inlinePathTarget = parseInlinePathToken(value);
  if (!inlinePathTarget) {
    return null;
  }

-  const normalizedPath = normalizePathToken(inlinePathTarget.path);
+  let pathPart = inlinePathTarget.path;
+  if (options.decodeHref) {
+    pathPart = safeDecodeURIComponent(pathPart);
+  }
+  const normalizedPath = normalizePathToken(pathPart);
  if (!normalizedPath || !isAbsolutePath(normalizedPath)) {
    return null;
  }
@@ -277,7 +291,7 @@ export function classifyAssistantFileLink(
    return null;
  }

-  if (isAmbiguousWorkspaceCandidate(trimmed, target, options.workspaceRoot)) {
+  if (isAmbiguousWorkspaceCandidate(trimmed, target, options)) {
    return {
      kind: "ambiguousFileCandidate",
      target,
@@ -308,32 +322,19 @@ export function parseAssistantFileLink(
    return null;
  }

-  const inlinePathTarget = parseAssistantInlinePathLink(trimmed);
+  const inlinePathTarget = parseAssistantInlinePathLink(trimmed, options);
  if (inlinePathTarget) {
    return inlinePathTarget;
  }

-  const windowsPathMatch = trimmed.match(/^([A-Za-z]:[\\/][^?#]*)(#[^?]+)?$/);
-  if (windowsPathMatch) {
-    const normalizedPath = normalizePathToken(windowsPathMatch[1] ?? "");
-    if (!normalizedPath) {
-      return null;
-    }
-
-    const lines = parseLineFragment(windowsPathMatch[2] ?? "");
-    if (!lines) {
-      return null;
-    }
-
-    return {
-      raw: value,
-      path: normalizedPath,
-      ...lines,
-    };
+  const windowsTarget = parseWindowsFileLink(trimmed, value, options);
+  if (windowsTarget) {
+    return windowsTarget;
  }

  const relativeTarget = parseWorkspaceRelativeFileLink(trimmed, {
    workspaceRoot: options.workspaceRoot,
+    decodeHref: options.decodeHref,
  });
  if (relativeTarget) {
    return relativeTarget;
@@ -343,19 +344,33 @@ export function parseAssistantFileLink(
    return null;
  }

-  let parsedUrl: URL;
-  try {
-    parsedUrl = new URL(trimmed, "http://paseo.invalid");
-  } catch {
-    return null;
+  // Hrefs go through URL parsing so `%`-escapes and `.`/`..` segments
+  // normalize before decode. Raw paths must not: `new URL` percent-encodes
+  // non-ASCII characters, which would corrupt `/tmp/开户.md` into the
+  // still-encoded name.
+  let pathPart: string;
+  let hashPart: string;
+  if (options.decodeHref) {
+    let parsedUrl: URL;
+    try {
+      parsedUrl = new URL(trimmed, "http://paseo.invalid");
+    } catch {
+      return null;
+    }
+    pathPart = safeDecodeURIComponent(parsedUrl.pathname);
+    hashPart = parsedUrl.hash;
+  } else {
+    const hashIndex = trimmed.indexOf("#");
+    pathPart = hashIndex >= 0 ? trimmed.slice(0, hashIndex) : trimmed;
+    hashPart = hashIndex >= 0 ? trimmed.slice(hashIndex) : "";
  }

-  const normalizedPath = normalizePathToken(safeDecodeURIComponent(parsedUrl.pathname));
+  const normalizedPath = normalizePathToken(pathPart);
  if (!normalizedPath || !isAbsolutePath(normalizedPath)) {
    return null;
  }

-  const lines = parseLineFragment(parsedUrl.hash);
+  const lines = parseLineFragment(hashPart);
  if (!lines) {
    return null;
  }
@@ -386,11 +401,42 @@ export function isFileLookingAssistantToken(value: string): boolean {
  return isPlausibleAssistantLocalPath(path);
 }

+function parseWindowsFileLink(
+  trimmed: string,
+  raw: string,
+  options: Pick<AssistantHrefParseOptions, "decodeHref"> = {},
+): InlinePathTarget | null {
+  const windowsPathMatch = trimmed.match(/^([A-Za-z]:[\\/][^?#]*)(#[^?]+)?$/);
+  if (!windowsPathMatch) {
+    return null;
+  }
+
+  let pathPart = windowsPathMatch[1] ?? "";
+  if (options.decodeHref) {
+    pathPart = safeDecodeURIComponent(pathPart);
+  }
+  const normalizedPath = normalizePathToken(pathPart);
+  if (!normalizedPath) {
+    return null;
+  }
+
+  const lines = parseLineFragment(windowsPathMatch[2] ?? "");
+  if (!lines) {
+    return null;
+  }
+
+  return {
+    raw,
+    path: normalizedPath,
+    ...lines,
+  };
+}
+
 function parseWorkspaceRelativeFileLink(
  value: string,
  options: AssistantHrefParseOptions,
 ): InlinePathTarget | null {
-  const parsed = parseLocalPathParts(value);
+  const parsed = parseLocalPathParts(value, options);
  if (!parsed || isAbsolutePath(parsed.path)) {
    return null;
  }
@@ -422,7 +468,11 @@ function parseWorkspaceRelativeFileLink(

 function parseLocalPathParts(
  value: string,
-): { path: string; lines: Pick<InlinePathTarget, "lineStart" | "lineEnd"> } | null {
+  options: Pick<AssistantHrefParseOptions, "decodeHref"> = {},
+): {
+  path: string;
+  lines: Pick<InlinePathTarget, "lineStart" | "lineEnd">;
+} | null {
  const normalized = normalizePathToken(value);
  if (!normalized || normalized.includes("?")) {
    return null;
@@ -436,14 +486,19 @@ function parseLocalPathParts(
    return null;
  }

+  // Split literal line markers before decoding; encoded punctuation belongs
+  // to the filename. Raw inline-code/path text stays untouched.
  const inlinePathTarget = parseInlinePathToken(beforeHash);
  if (inlinePathTarget) {
-    if (!isPlausibleAssistantLocalPath(inlinePathTarget.path)) {
+    let pathPart = inlinePathTarget.path;
+    if (options.decodeHref) {
+      pathPart = safeDecodeURIComponent(pathPart);
+    }
+    if (!isPlausibleAssistantLocalPath(pathPart)) {
      return null;
    }
-
    return {
-      path: inlinePathTarget.path,
+      path: pathPart,
      lines: {
        lineStart: inlinePathTarget.lineStart,
        lineEnd: inlinePathTarget.lineEnd,
@@ -455,12 +510,17 @@ function parseLocalPathParts(
    return null;
  }

-  if (!isPlausibleAssistantLocalPath(beforeHash)) {
+  let decodedBeforeHash = beforeHash;
+  if (options.decodeHref) {
+    decodedBeforeHash = safeDecodeURIComponent(beforeHash);
+  }
+  const plausiblePath = parseInlinePathToken(decodedBeforeHash)?.path ?? decodedBeforeHash;
+  if (!isPlausibleAssistantLocalPath(plausiblePath)) {
    return null;
  }

  return {
-    path: beforeHash,
+    path: decodedBeforeHash,
    lines: fragmentLines,
  };
 }
@@ -545,14 +605,14 @@ function isExternalHref(value: string): boolean {
 function isAmbiguousWorkspaceCandidate(
  value: string,
  target: InlinePathTarget,
-  workspaceRoot?: string,
+  options: AssistantHrefParseOptions = {},
 ): boolean {
-  const normalizedWorkspaceRoot = normalizePathInput(workspaceRoot);
+  const normalizedWorkspaceRoot = normalizePathInput(options.workspaceRoot);
  if (!normalizedWorkspaceRoot || !isAllowedAbsolutePath(target.path, normalizedWorkspaceRoot)) {
    return false;
  }

-  const parsed = parseLocalPathParts(value);
+  const parsed = parseLocalPathParts(value, options);
  if (!parsed || isAbsolutePath(parsed.path)) {
    return false;
  }
@@ -1,4 +1,8 @@
 import { describe, expect, it } from "vitest";
+import MarkdownIt from "markdown-it";
+import { mkdir, mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import path from "node:path";
 import {
  classifyForResolution,
  fetchDaemonResolution,
@@ -14,6 +18,25 @@ const CONTEXT: AssistantFileLinkContext = {
  workspaceRoot: "/Users/test/project",
 };

+it("opens the existing non-ASCII file named by a rendered markdown link", async () => {
+  const workspaceRoot = await mkdtemp(path.join(tmpdir(), "assistant-file-link-"));
+  try {
+    await mkdir(path.join(workspaceRoot, "docs/reports"), { recursive: true });
+    await writeFile(path.join(workspaceRoot, "docs/reports/开户赠金.md"), "report content");
+    const tokens = new MarkdownIt().parseInline("[报告](docs/reports/开户赠金.md)", {});
+    const href = tokens[0].children?.find((token) => token.type === "link_open")?.attrGet("href");
+    expect(href).toBe("docs/reports/%E5%BC%80%E6%88%B7%E8%B5%A0%E9%87%91.md");
+    const resolution = classifyForResolution({ href: href! }, { workspaceRoot });
+    expect(resolution.kind).toBe("resolved");
+    if (resolution.kind !== "resolved" || resolution.value.kind !== "file") {
+      throw new Error("Expected a directly resolved file link");
+    }
+    expect(await readFile(resolution.value.target.path, "utf8")).toBe("report content");
+  } finally {
+    await rm(workspaceRoot, { recursive: true, force: true });
+  }
+});
+
 function resolvedSuggestions(
  entries: DirectorySuggestionResult["entries"],
 ): DirectorySuggestionResult {
@@ -52,6 +75,27 @@ const unavailableSuggestions: GetDirectorySuggestions = async () => {
 };

 describe("classifyForResolution", () => {
+  it.each([
+    ["C:/repo/my%20file.md", undefined],
+    ["C:\\repo\\my%20file.md", undefined],
+    ["C:/repo/my%20file.md:12", 12],
+    ["C:\\repo\\my%20file.md:12", 12],
+  ])("keeps the literal filename in Windows inline code %s", (href, lineStart) => {
+    for (const text of [href, undefined]) {
+      const result = classifyForResolution(
+        { href, text, sourceType: "inline-code" },
+        { workspaceRoot: "C:/repo" },
+      );
+      expect(result).toMatchObject({
+        kind: "resolved",
+        value: { kind: "file", target: { path: "C:/repo/my%20file.md", lineStart } },
+      });
+    }
+    expect(classifyForResolution({ href }, { workspaceRoot: "C:/repo" })).toMatchObject({
+      kind: "resolved",
+      value: { kind: "file", target: { path: "C:/repo/my file.md", lineStart } },
+    });
+  });
  it("returns the directFile target synchronously", () => {
    const result = classifyForResolution({ href: "src/components/message.tsx#L33" }, CONTEXT);

@@ -165,6 +209,46 @@ describe("classifyForResolution", () => {

    expect(result).toEqual({ kind: "resolved", value: { kind: "ignored" } });
  });
+
+  it("decodes percent-encoded markdown hrefs", () => {
+    const result = classifyForResolution({ href: "docs/my%20file.md" }, CONTEXT);
+
+    expect(result).toEqual({
+      kind: "resolved",
+      value: {
+        kind: "file",
+        target: {
+          raw: "docs/my%20file.md",
+          path: "/Users/test/project/docs/my file.md",
+          lineStart: undefined,
+          lineEnd: undefined,
+        },
+      },
+    });
+  });
+
+  it("keeps literal percent signs in inline-code paths", () => {
+    const result = classifyForResolution(
+      {
+        href: "docs/my%20file.md",
+        text: "docs/my%20file.md",
+        sourceType: "inline-code",
+      },
+      CONTEXT,
+    );
+
+    expect(result).toEqual({
+      kind: "needsLookup",
+      ambiguousQuery: "docs/my%20file.md",
+      token: "docs/my%20file.md",
+      target: {
+        raw: "docs/my%20file.md",
+        path: "/Users/test/project/docs/my%20file.md",
+        lineStart: undefined,
+        lineEnd: undefined,
+      },
+    });
+  });
 });

 describe("fetchDaemonResolution", () => {
@@ -108,13 +108,15 @@ export function classifyForResolution(
  source: AssistantFileLinkSource,
  context: AssistantFileLinkContext,
 ): AssistantFileLinkResolution {
-  const token = getAssistantFileLinkToken(source).trim();
+  const tokenInfo = getAssistantFileLinkTokenInfo(source);
+  const token = tokenInfo.token.trim();
  if (!token) {
    return { kind: "resolved", value: { kind: "ignored" } };
  }

  const classification = classifyAssistantFileLink(token, {
    workspaceRoot: context.workspaceRoot,
+    decodeHref: tokenInfo.fromHref,
  });
  if (!classification) {
    return { kind: "resolved", value: { kind: "ignored" } };
@@ -148,14 +150,26 @@ export function classifyForResolution(
 }

 export function getAssistantFileLinkToken(source: AssistantFileLinkSource): string {
-  if (isLinkifiedSource(source) || source.sourceType === "inline-code") {
+  return getAssistantFileLinkTokenInfo(source).token;
+}
+
+// Markdown link hrefs are percent-encoded by the renderer; inline-code and
+// linkified text are raw file paths that must not be decoded.
+function getAssistantFileLinkTokenInfo(source: AssistantFileLinkSource): {
+  token: string;
+  fromHref: boolean;
+} {
+  if (source.sourceType === "inline-code") {
+    return { token: source.text?.trim() || source.href, fromHref: false };
+  }
+  if (isLinkifiedSource(source)) {
    const text = source.text?.trim();
    if (text && isFileLookingAssistantToken(text)) {
-      return text;
+      return { token: text, fromHref: false };
    }
  }

-  return source.href;
+  return { token: source.href, fromHref: true };
 }

 export function getAmbiguousSuggestionQuery(
@@ -29,14 +29,21 @@ export interface AssistantFileLinkActions {
  canResolveFile(source: AssistantFileLinkSource): boolean;
 }

+interface AssistantFileLinkLookupKey {
+  query: string;
+  path: string;
+  lineStart: number | null;
+  lineEnd: number | null;
+}
+
 type AssistantFileLinkQueryKey = readonly [
  "assistantFileLink",
  string | null,
  string | null,
-  string,
+  AssistantFileLinkLookupKey | null,
 ];

-const DISABLED_QUERY_KEY = ["assistantFileLink", null, null, ""] as const;
+const DISABLED_QUERY_KEY = ["assistantFileLink", null, null, null] as const;

 export function useFileLink(source: AssistantFileLinkSource): UseFileLinkResult {
  const { t } = useTranslation();
@@ -59,7 +66,7 @@ export function useFileLink(source: AssistantFileLinkSource): UseFileLinkResult
        ? assistantFileLinkQueryKey({
            serverId,
            workspaceRoot,
-            token: resolution.token,
+            resolution,
          })
        : DISABLED_QUERY_KEY,
    [resolution, serverId, workspaceRoot],
@@ -179,7 +186,7 @@ function openAssistantFileLink(input: {
  const capturedQueryKey = assistantFileLinkQueryKey({
    serverId: capturedConfig.serverId,
    workspaceRoot: capturedConfig.workspaceRoot,
-    token: capturedResolution.token,
+    resolution: capturedResolution,
  });

  const run = async () => {
@@ -245,9 +252,19 @@ function useStableSource(source: AssistantFileLinkSource): AssistantFileLinkSour
 function assistantFileLinkQueryKey(input: {
  serverId?: string;
  workspaceRoot?: string;
-  token: string;
+  resolution: Extract<AssistantFileLinkResolution, { kind: "needsLookup" }>;
 }): AssistantFileLinkQueryKey {
-  return ["assistantFileLink", input.serverId ?? null, input.workspaceRoot ?? null, input.token];
+  return [
+    "assistantFileLink",
+    input.serverId ?? null,
+    input.workspaceRoot ?? null,
+    {
+      query: input.resolution.ambiguousQuery,
+      path: input.resolution.target.path,
+      lineStart: input.resolution.target.lineStart ?? null,
+      lineEnd: input.resolution.target.lineEnd ?? null,
+    },
+  ];
 }

 async function dispatchResolvedLink(input: {
@@ -42,6 +42,18 @@ describe("fileUriToPath", () => {
 });

 describe("localFileSourceToPath", () => {
+  it.each([
+    "https://example.com/image%20name.png",
+    "data:image/png;base64,abc%20",
+    "blob:https://example.com/image%20name",
+  ])("preserves a direct Markdown image URI: %s", (source) => {
+    expect(localFileSourceToPath(source, { decodeHref: true })).toBe(source);
+  });
+
+  it("preserves malformed percent escapes rather than throwing", () => {
+    expect(localFileSourceToPath("/tmp/100%.png", { decodeHref: true })).toBe("/tmp/100%.png");
+  });
+
  it("decodes markdown-encoded Windows drive-letter paths", () => {
    expect(localFileSourceToPath("C:%5CUsers%5Cfile.txt")).toBe("C:/Users/file.txt");
  });
@@ -173,11 +173,18 @@ export function fileUriToPath(uri: string): string {
  return normalizeWindowsDrivePath(decodedPath.replace(/^\/([A-Za-z]:[\\/])/, "$1"));
 }

-export function localFileSourceToPath(source: string): string {
+export function localFileSourceToPath(
+  source: string,
+  // Markdown destinations are URI-encoded; plain filesystem paths are not.
+  { decodeHref = false }: { decodeHref?: boolean } = {},
+): string {
+  if (/^(https?:|data:|blob:)/i.test(source)) {
+    return source;
+  }
  let path = source;
  if (source.startsWith("file://")) {
    path = fileUriToPath(source);
-  } else if (isMarkdownEncodedWindowsDrivePath(source)) {
+  } else if (decodeHref || isMarkdownEncodedWindowsDrivePath(source)) {
    path = decodeFilePathSource(source);
  }
  return normalizeWindowsDrivePath(path);
@@ -1,8 +1,5 @@
 import { describe, expect, it } from "vitest";
-import {
-  getBottomSheetVisibleContentHeight,
-  getCompactSheetSafeAreaPadding,
-} from "@/components/adaptive-modal-sheet-layout";
+import { getCompactSheetSafeAreaPadding } from "@/components/adaptive-modal-sheet-layout";

 describe("getCompactSheetSafeAreaPadding", () => {
  it("assigns safe clearance to the footer independently of decorative padding", () => {
@@ -49,17 +46,3 @@ describe("getCompactSheetSafeAreaPadding", () => {
    ).toEqual({});
  });
 });
-
-describe("getBottomSheetVisibleContentHeight", () => {
-  it("stops subtracting the retained keyboard height after the keyboard hides", () => {
-    const layout = {
-      containerHeight: 874,
-      contentPosition: 88,
-      handleHeight: 24,
-      keyboardHeight: 344,
-    };
-
-    expect(getBottomSheetVisibleContentHeight({ ...layout, isKeyboardVisible: true })).toBe(418);
-    expect(getBottomSheetVisibleContentHeight({ ...layout, isKeyboardVisible: false })).toBe(762);
-  });
-});
@@ -10,28 +10,6 @@ export interface CompactSheetSafeAreaPadding {
  footerPaddingBottom?: number;
 }

-interface BottomSheetVisibleContentHeightInput {
-  containerHeight: number;
-  contentPosition: number;
-  handleHeight: number;
-  keyboardHeight: number;
-  isKeyboardVisible: boolean;
-}
-
-export function getBottomSheetVisibleContentHeight({
-  containerHeight,
-  contentPosition,
-  handleHeight,
-  keyboardHeight,
-  isKeyboardVisible,
-}: BottomSheetVisibleContentHeightInput): number {
-  "worklet";
-  return Math.max(
-    0,
-    containerHeight - contentPosition - handleHeight - (isKeyboardVisible ? keyboardHeight : 0),
-  );
-}
-
 export function getCompactSheetSafeAreaPadding({
  isCompact,
  isKeyboardVisible,
@@ -1,10 +1,10 @@
 import { useCallback, useEffect, useMemo, useState } from "react";
-import type { ReactNode } from "react";
+import type { ComponentProps, ReactNode } from "react";
 import { createPortal } from "react-dom";
 import { useTranslation } from "react-i18next";
 import { Keyboard, Pressable, Text, View } from "react-native";
 import type { DimensionValue, StyleProp, ViewStyle } from "react-native";
-import { StyleSheet, useUnistyles } from "react-native-unistyles";
+import { StyleSheet, useUnistyles, withUnistyles } from "react-native-unistyles";
 import { useIsCompactFormFactor } from "@/constants/layout";
 import {
  getOverlayRoot,
@@ -12,22 +12,16 @@ import {
  useGlobalWebOverlayLayer,
  useWebOverlayRegistration,
 } from "../lib/overlay-root";
-import {
-  KEYBOARD_STATUS,
-  useBottomSheetInternal,
-  type BottomSheetBackgroundProps,
-} from "@gorhom/bottom-sheet";
-import Animated, { useAnimatedStyle } from "react-native-reanimated";
-import { ArrowLeft, Search, X } from "lucide-react-native";
+import { BottomSheetHandle, type BottomSheetBackgroundProps } from "@gorhom/bottom-sheet";
+import Animated from "react-native-reanimated";
+import { ArrowLeft, Search, X, type LucideIcon } from "lucide-react-native";
 import {
  IsolatedBottomSheetModal,
+  SheetVisibleFrame,
  type ContextBridge,
  useIsolatedBottomSheetVisibility,
 } from "@/components/ui/isolated-bottom-sheet-modal";
-import {
-  getBottomSheetVisibleContentHeight,
-  getCompactSheetSafeAreaPadding,
-} from "@/components/adaptive-modal-sheet-layout";
+import { getCompactSheetSafeAreaPadding } from "@/components/adaptive-modal-sheet-layout";
 import { ScrollView } from "@/components/ui/scroll-view";
 import { isWeb } from "@/constants/platform";
 import { useKeyboardVisibility } from "@/hooks/use-keyboard-visibility";
@@ -207,10 +201,6 @@ const styles = StyleSheet.create((theme) => ({
    flex: 1,
    minHeight: 0,
  },
-  bottomSheetVisibleContent: {
-    minHeight: 0,
-    overflow: "hidden",
-  },
  bottomSheetVisibleScroll: {
    flex: 1,
    minHeight: 0,
@@ -233,7 +223,8 @@ const styles = StyleSheet.create((theme) => ({

 const WEB_EXIT_DURATION_MS = 160;

-function SheetBackground({ style }: BottomSheetBackgroundProps) {
+/** The compact sheet's surface: Gorhom's `backgroundComponent` for every bottom sheet. */
+export function SheetBackground({ style }: BottomSheetBackgroundProps) {
  const { theme } = useUnistyles();
  const combinedStyle = useMemo(
    () => [
@@ -249,6 +240,39 @@ function SheetBackground({ style }: BottomSheetBackgroundProps) {
  return <Animated.View pointerEvents="none" style={combinedStyle} />;
 }

+const ThemedBottomSheetHandle = withUnistyles(BottomSheetHandle, (theme) => ({
+  indicatorStyle: { backgroundColor: theme.colors.palette.zinc[600] },
+}));
+
+const HANDLE_WITH_CONTENT_STYLE = { paddingHorizontal: 0, paddingBottom: 0 };
+
+/**
+ * The compact sheet's drag handle: Gorhom's `handleComponent` for every bottom sheet. Children
+ * join the handle, so a header passed here drags the sheet like the indicator does. That is how a
+ * sheet whose content scrolls on its own keeps its header draggable without content panning.
+ */
+export function SheetHandle({
+  children,
+  // Gorhom passes `indicatorStyle={undefined}`, which would override the themed indicator.
+  indicatorStyle: _indicatorStyle,
+  ...props
+}: ComponentProps<typeof BottomSheetHandle>) {
+  if (!children) return <ThemedBottomSheetHandle {...props} />;
+  // The children carry their own semantics; the handle's slider role would swallow them on web.
+  return (
+    <ThemedBottomSheetHandle
+      {...props}
+      style={HANDLE_WITH_CONTENT_STYLE}
+      accessible={false}
+      accessibilityRole={null}
+      accessibilityLabel={null}
+      accessibilityHint={null}
+    >
+      {children}
+    </ThemedBottomSheetHandle>
+  );
+}
+
 /**
 * The sheet body, indented to the sheet's content inset.
 *
@@ -263,37 +287,34 @@ function SheetContent({ style, children }: { style: StyleProp<ViewStyle>; childr
  return <View style={[styles.sheetContent, style]}>{children}</View>;
 }

-function BottomSheetVisibleContent({ children }: { children: ReactNode }) {
-  const { animatedDetentsState, animatedKeyboardState, animatedLayoutState, animatedPosition } =
-    useBottomSheetInternal();
-  const visibleContentStyle = useAnimatedStyle(() => {
-    const { containerHeight, handleHeight } = animatedLayoutState.get();
-    if (containerHeight < 0 || handleHeight < 0) {
-      return { height: 0 };
-    }
-
-    const initialDetentPosition = animatedDetentsState.get().detents?.[0];
-    const contentPosition =
-      initialDetentPosition == null
-        ? animatedPosition.get()
-        : Math.min(animatedPosition.get(), initialDetentPosition);
-
-    const keyboardState = animatedKeyboardState.get();
-    return {
-      height: getBottomSheetVisibleContentHeight({
-        containerHeight,
-        contentPosition,
-        handleHeight,
-        keyboardHeight: keyboardState.heightWithinContainer,
-        isKeyboardVisible: keyboardState.status === KEYBOARD_STATUS.SHOWN,
-      }),
-    };
-  }, [animatedDetentsState, animatedKeyboardState, animatedLayoutState, animatedPosition]);
-
+/**
+ * An icon action in a sheet header's trailing rail, drawn like the Close button so a header's
+ * actions line up with it at one size. Pass it through `SheetHeader.actions`.
+ */
+export function SheetHeaderIconButton({
+  icon: Icon,
+  accessibilityLabel,
+  onPress,
+  testID,
+}: {
+  icon: LucideIcon;
+  accessibilityLabel: string;
+  onPress: () => void;
+  testID?: string;
+}) {
+  const { theme } = useUnistyles();
  return (
-    <Animated.View style={[styles.bottomSheetVisibleContent, visibleContentStyle]}>
-      {children}
-    </Animated.View>
+    <Pressable
+      accessibilityRole="button"
+      accessibilityLabel={accessibilityLabel}
+      style={styles.closeButton}
+      onPress={onPress}
+      testID={testID}
+    >
+      {({ pressed }) => (
+        <Icon size={16} color={pressed ? theme.colors.foreground : theme.colors.foregroundMuted} />
+      )}
+    </Pressable>
  );
 }

@@ -353,19 +374,11 @@ export function SheetHeaderView({
        </View>
        {header.actions ? <View style={styles.headerActions}>{header.actions}</View> : null}
        {showCloseButton ? (
-          <Pressable
-            accessibilityRole="button"
+          <SheetHeaderIconButton
+            icon={X}
            accessibilityLabel={t("common.actions.close")}
-            style={styles.closeButton}
            onPress={onClose}
-          >
-            {({ pressed }) => (
-              <X
-                size={16}
-                color={pressed ? theme.colors.foreground : theme.colors.foregroundMuted}
-              />
-            )}
-          </Pressable>
+          />
        ) : null}
      </View>
      {search ? (
@@ -471,8 +484,6 @@ export interface AdaptiveModalSheetProps {
  bodyStyle?: StyleProp<ViewStyle>;
  /** Layout intent for the sheet body, composed over the sheet's own content inset. */
  contentStyle?: StyleProp<ViewStyle>;
-  /** Size compact sheet content to the live snap height instead of its largest snap point. */
-  sizeContentToCurrentSnapPoint?: boolean;
  /** Re-establishes caller-owned contexts inside the native or compact sheet portal. */
  contextBridge?: ContextBridge | null;
 }
@@ -493,10 +504,8 @@ export function AdaptiveModalSheet({
  presentation,
  contentStyle,
  bodyStyle,
-  sizeContentToCurrentSnapPoint = true,
  contextBridge = null,
 }: AdaptiveModalSheetProps) {
-  const { theme } = useUnistyles();
  const { t } = useTranslation();
  const isMobile = useIsCompactFormFactor();
  const insets = useSafeAreaInsets();
@@ -519,14 +528,14 @@ export function AdaptiveModalSheet({
    () => ({ paddingBottom: compactSafeAreaPadding.footerPaddingBottom ?? 0 }),
    [compactSafeAreaPadding.footerPaddingBottom],
  );
-  const footerView = footer ? (
-    <View style={footerClearanceStyle}>
-      <View style={[styles.footer, footerContainerStyle]}>{footer}</View>
-    </View>
-  ) : null;
-  const handleIndicatorStyle = useMemo(
-    () => ({ backgroundColor: theme.colors.palette.zinc[600] }),
-    [theme.colors.palette.zinc],
+  const footerView = useMemo(
+    () =>
+      footer ? (
+        <View style={footerClearanceStyle}>
+          <View style={[styles.footer, footerContainerStyle]}>{footer}</View>
+        </View>
+      ) : null,
+    [footer, footerClearanceStyle, footerContainerStyle],
  );
  useEffect(() => {
    if (!isWeb && visible) {
@@ -628,7 +637,6 @@ export function AdaptiveModalSheet({
            </View>
          )}
        </View>
-        {footerView}
      </>
    );

@@ -644,17 +652,13 @@ export function AdaptiveModalSheet({
        backdropOpacity={0.45}
        enablePanDownToClose
        backgroundComponent={SheetBackground}
-        handleIndicatorStyle={handleIndicatorStyle}
+        handleComponent={SheetHandle}
        keyboardBehavior="extend"
        keyboardBlurBehavior="restore"
        accessible={false}
        presentation={presentation}
      >
-        {sizeContentToCurrentSnapPoint ? (
-          <BottomSheetVisibleContent>{sheetContent}</BottomSheetVisibleContent>
-        ) : (
-          sheetContent
-        )}
+        <SheetVisibleFrame footer={footerView}>{sheetContent}</SheetVisibleFrame>
      </IsolatedBottomSheetModal>
    );
  }
@@ -0,0 +1,99 @@
+import { useCallback, useId, useState, type ReactNode } from "react";
+import { View, type LayoutChangeEvent } from "react-native";
+import Svg, { Defs, LinearGradient as SvgLinearGradient, Rect, Stop } from "react-native-svg";
+import { StyleSheet, withUnistyles } from "react-native-unistyles";
+import type { Theme } from "@/styles/theme";
+
+/** How far the fade runs past the header's bottom edge, so content dissolves instead of clipping. */
+const FADE_OVERHANG = 24;
+
+interface FloatingHeaderLayoutProps {
+  header: ReactNode;
+  /** Float only when the content supports visual-top clearance. */
+  floating: boolean;
+  children: (topOverlayInset: number) => ReactNode;
+}
+
+/**
+ * Stacks a header above content, or floats it over the content behind a fade. Children keep the
+ * same tree position in both modes, so toggling `floating` never remounts them.
+ */
+export function FloatingHeaderLayout({ header, floating, children }: FloatingHeaderLayoutProps) {
+  const [headerHeight, setHeaderHeight] = useState(0);
+  const handleHeaderLayout = useCallback((event: LayoutChangeEvent) => {
+    setHeaderHeight(Math.round(event.nativeEvent.layout.height));
+  }, []);
+
+  return (
+    <View style={styles.root}>
+      {floating ? null : header}
+      <View style={styles.content}>{children(floating ? headerHeight : 0)}</View>
+      {floating ? (
+        <View style={styles.overlay} pointerEvents="box-none" onLayout={handleHeaderLayout}>
+          <FloatingHeaderFade />
+          {header}
+        </View>
+      ) : null}
+    </View>
+  );
+}
+
+function FloatingHeaderFadeSvg({ gradientId, color }: { gradientId: string; color: string }) {
+  return (
+    <Svg width="100%" height="100%" preserveAspectRatio="none">
+      <Defs>
+        <SvgLinearGradient id={gradientId} x1="0%" y1="0%" x2="0%" y2="100%">
+          {/* Vary opacity rather than interpolating toward `transparent`, which crosses black in
+              some engines and leaves a grey fringe. */}
+          <Stop offset="0%" stopColor={color} stopOpacity={1} />
+          <Stop offset="50%" stopColor={color} stopOpacity={0.97} />
+          <Stop offset="75%" stopColor={color} stopOpacity={0.8} />
+          <Stop offset="100%" stopColor={color} stopOpacity={0} />
+        </SvgLinearGradient>
+      </Defs>
+      <Rect x="0" y="0" width="100%" height="100%" fill={`url(#${gradientId})`} />
+    </Svg>
+  );
+}
+
+const ThemedFloatingHeaderFadeSvg = withUnistyles(FloatingHeaderFadeSvg);
+const workspaceSurfaceColorMapping = (theme: Theme) => ({
+  color: theme.colors.surfaceWorkspace,
+});
+
+function FloatingHeaderFade() {
+  // React-generated ids contain characters that are invalid inside SVG fragment references.
+  const gradientId = `floating-header-fade-${useId().replace(/[^a-zA-Z0-9_-]/g, "")}`;
+  return (
+    <View style={styles.fade} pointerEvents="none">
+      <ThemedFloatingHeaderFadeSvg
+        gradientId={gradientId}
+        uniProps={workspaceSurfaceColorMapping}
+      />
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  root: {
+    flex: 1,
+    minHeight: 0,
+  },
+  content: {
+    flex: 1,
+    minHeight: 0,
+  },
+  overlay: {
+    position: "absolute",
+    top: 0,
+    left: 0,
+    right: 0,
+  },
+  fade: {
+    position: "absolute",
+    top: 0,
+    left: 0,
+    right: 0,
+    bottom: -FADE_OVERHANG,
+  },
+});
@@ -6,10 +6,11 @@ import { StyleSheet, useUnistyles } from "react-native-unistyles";
 import { ArrowLeft } from "lucide-react-native";
 import { ScreenHeader } from "./screen-header";
 import { ScreenTitle } from "./screen-title";
+import { CompactHeader } from "./compact-header";
+import { useIsCompactFormFactor } from "@/constants/layout";

 interface BackHeaderProps {
  title?: string;
-  titleAccessory?: ReactNode;
  rightContent?: ReactNode;
  onBack?: () => void;
 }
@@ -18,7 +19,15 @@ function goBack(): void {
  router.back();
 }

-export function BackHeader({ title, titleAccessory, rightContent, onBack }: BackHeaderProps) {
+export function BackHeader({ title, rightContent, onBack }: BackHeaderProps) {
+  const isCompact = useIsCompactFormFactor();
+  if (isCompact) {
+    return <CompactHeader navigation="back" title={title} onBack={onBack} actions={rightContent} />;
+  }
+  return <DesktopBackHeader title={title} rightContent={rightContent} onBack={onBack} />;
+}
+
+function DesktopBackHeader({ title, rightContent, onBack }: BackHeaderProps) {
  const { theme } = useUnistyles();
  const { t } = useTranslation();
  const handleBack = useCallback(() => {
@@ -42,7 +51,6 @@ export function BackHeader({ title, titleAccessory, rightContent, onBack }: Back
            <ArrowLeft size={theme.iconSize.lg} color={theme.colors.foregroundMuted} />
          </Pressable>
          {title && <ScreenTitle>{title}</ScreenTitle>}
-          {titleAccessory}
        </>
      }
      right={rightContent}
@@ -56,10 +64,7 @@ const styles = StyleSheet.create((theme) => ({
    gap: theme.spacing[2],
  },
  backButton: {
-    padding: {
-      xs: theme.spacing[3],
-      md: theme.spacing[2],
-    },
+    padding: theme.spacing[2],
    borderRadius: theme.borderRadius.lg,
  },
 }));
@@ -0,0 +1,168 @@
+import { useCallback, useMemo, type ReactNode } from "react";
+import { useTranslation } from "react-i18next";
+import { Text, View } from "react-native";
+import { router } from "expo-router";
+import { ArrowLeft } from "lucide-react-native";
+import { useSafeAreaInsets } from "react-native-safe-area-context";
+import { StyleSheet, withUnistyles } from "react-native-unistyles";
+import { HeaderToggleButton } from "@/components/headers/header-toggle-button";
+import { SidebarMenuToggle } from "@/components/headers/sidebar-menu-toggle";
+import {
+  IconButtonChromeProvider,
+  iconButtonChromeGlyphSize,
+  mutedIconColorMapping,
+} from "@/components/ui/icon-button-chrome";
+import { HEADER_INNER_HEIGHT_MOBILE, HEADER_TOP_PADDING_MOBILE } from "@/constants/layout";
+import type { ShortcutKey } from "@/utils/format-shortcut";
+
+const ThemedArrowLeft = withUnistyles(ArrowLeft);
+
+const ISLAND_PADDING = 7;
+const NO_SHORTCUT: ShortcutKey[] = [];
+
+interface CompactHeaderProps {
+  /** The leading island: the sidebar menu, or a back button. */
+  navigation: "menu" | "back";
+  /** Back button action. Defaults to navigating back. */
+  onBack?: () => void;
+  title?: string;
+  titleTestID?: string;
+  /** A line under the title. */
+  subtitle?: ReactNode;
+  /** Show a placeholder instead of the title while it loads. */
+  loading?: boolean;
+  /** Icon actions inherit the island chrome through the shared button primitives. */
+  actions?: ReactNode;
+}
+
+/**
+ * The phone header: the navigation button and the screen's actions sit in islands, with the title
+ * left-aligned between them. It has no background of its own, so it reads the same in flow and floating
+ * over content (see `FloatingHeaderLayout`). Its height matches the old flat header, so anything
+ * offset by the header height still lines up.
+ */
+export function CompactHeader({
+  navigation,
+  onBack,
+  title,
+  titleTestID,
+  subtitle,
+  loading = false,
+  actions,
+}: CompactHeaderProps) {
+  const insets = useSafeAreaInsets();
+  const rootStyle = useMemo(
+    () => [styles.root, { paddingTop: insets.top + HEADER_TOP_PADDING_MOBILE }],
+    [insets.top],
+  );
+
+  return (
+    <IconButtonChromeProvider value="header-island">
+      <View style={rootStyle}>
+        <View style={styles.row}>
+          <View style={styles.island}>
+            {navigation === "menu" ? <SidebarMenuToggle /> : <BackButton onBack={onBack} />}
+          </View>
+          <View style={styles.titleGroup}>
+            <CompactHeaderTitle
+              loading={loading}
+              title={title}
+              titleTestID={titleTestID}
+              subtitle={subtitle}
+            />
+          </View>
+          {actions ? <View style={styles.island}>{actions}</View> : null}
+        </View>
+      </View>
+    </IconButtonChromeProvider>
+  );
+}
+
+function CompactHeaderTitle({
+  loading,
+  title,
+  titleTestID,
+  subtitle,
+}: Pick<CompactHeaderProps, "title" | "titleTestID" | "subtitle"> & { loading: boolean }) {
+  if (loading) {
+    return <View style={styles.titleSkeleton} />;
+  }
+  return (
+    <>
+      {title ? (
+        <Text style={styles.title} numberOfLines={1} testID={titleTestID}>
+          {title}
+        </Text>
+      ) : null}
+      {subtitle}
+    </>
+  );
+}
+
+function BackButton({ onBack }: { onBack?: () => void }) {
+  const { t } = useTranslation();
+  const handlePress = useCallback(() => {
+    if (onBack) {
+      onBack();
+      return;
+    }
+    router.back();
+  }, [onBack]);
+  return (
+    <HeaderToggleButton
+      onPress={handlePress}
+      tooltipLabel={t("common.actions.back")}
+      tooltipKeys={NO_SHORTCUT}
+      tooltipSide="right"
+      testID="header-back-button"
+      accessibilityRole="button"
+      accessibilityLabel={t("common.actions.back")}
+    >
+      <ThemedArrowLeft
+        size={iconButtonChromeGlyphSize("large")}
+        strokeWidth={1.5}
+        uniProps={mutedIconColorMapping}
+      />
+    </HeaderToggleButton>
+  );
+}
+
+const styles = StyleSheet.create((theme) => ({
+  root: {
+    paddingHorizontal: theme.spacing[3],
+  },
+  row: {
+    height: HEADER_INNER_HEIGHT_MOBILE,
+    flexDirection: "row",
+    alignItems: "center",
+    gap: theme.spacing[2],
+  },
+  titleGroup: {
+    flex: 1,
+    minWidth: 0,
+    // Both title lines receive the remaining width; text alignment does not size the slot.
+    alignItems: "stretch",
+  },
+  island: {
+    flexDirection: "row",
+    alignItems: "center",
+    padding: ISLAND_PADDING,
+    borderRadius: theme.borderRadius.full,
+    backgroundColor: theme.colors.surface2,
+    ...theme.shadow.sm,
+  },
+  title: {
+    fontSize: theme.fontSize.base,
+    fontWeight: theme.fontWeight.medium,
+    color: theme.colors.foreground,
+    textAlign: "left",
+  },
+  titleSkeleton: {
+    width: 140,
+    maxWidth: "100%",
+    height: 22,
+    borderRadius: theme.borderRadius.full,
+    backgroundColor: theme.colors.surface3,
+    opacity: 0.25,
+  },
+}));
@@ -1,4 +1,4 @@
-import { useMemo, type ReactElement, type ReactNode } from "react";
+import { type ReactElement, type ReactNode } from "react";
 import { Text, View, type PressableProps, type StyleProp, type ViewStyle } from "react-native";
 import { StyleSheet } from "react-native-unistyles";
 import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip";
@@ -7,7 +7,7 @@ import type { ShortcutKey } from "@/utils/format-shortcut";
 import { isWeb } from "@/constants/platform";
 import {
  iconButtonChromeFrameStyle,
-  iconButtonChromeStyle,
+  useIconButtonChromeStyle,
 } from "@/components/ui/icon-button-chrome";

 interface HeaderToggleButtonState {
@@ -46,17 +46,11 @@ export function HeaderToggleButton({
      ? ({ "aria-expanded": expandedState } as Record<string, boolean>)
      : null;

-  const combinedStyle = useMemo(
-    () =>
-      ({ hovered, pressed }: { hovered?: boolean; pressed: boolean }) =>
-        iconButtonChromeStyle({
-          size: "large",
-          state: { hovered: Boolean(hovered), pressed },
-          disabled: Boolean(disabled),
-          style,
-        }),
-    [disabled, style],
-  );
+  const combinedStyle = useIconButtonChromeStyle({
+    size: "large",
+    disabled: Boolean(disabled),
+    style,
+  });

  return (
    <Tooltip delayDuration={tooltipDelayDuration} enabledOnDesktop enabledOnMobile={false}>
@@ -1,16 +1,10 @@
-import { useCallback, useMemo, type ReactNode } from "react";
-import { useTranslation } from "react-i18next";
-import { View, type StyleProp, type ViewStyle } from "react-native";
-import { StyleSheet, useUnistyles } from "react-native-unistyles";
-import { PanelLeft } from "lucide-react-native";
+import type { ReactNode } from "react";
+import { StyleSheet } from "react-native-unistyles";
 import { ScreenHeader } from "./screen-header";
 import { ScreenTitle } from "./screen-title";
-import { HeaderToggleButton, headerIconSlotStyle } from "./header-toggle-button";
-import { selectIsAgentListOpen, usePanelStore } from "@/stores/panel-store";
+import { CompactHeader } from "./compact-header";
+import { SidebarMenuToggle } from "./sidebar-menu-toggle";
 import { useIsCompactFormFactor } from "@/constants/layout";
-import { getShortcutOs } from "@/utils/shortcut-platform";
-import { useHasWindowChromeObstruction, useOwnsWindowChromeCorner } from "@/utils/desktop-window";
-import { iconButtonChromeGlyphSize } from "@/components/ui/icon-button-chrome";

 interface MenuHeaderProps {
  title?: string;
@@ -18,130 +12,11 @@ interface MenuHeaderProps {
  borderless?: boolean;
 }

-interface SidebarMenuToggleProps {
-  style?: StyleProp<ViewStyle>;
-  tooltipSide?: "left" | "right" | "top" | "bottom";
-  testID?: string;
-  nativeID?: string;
-}
-
-const MOBILE_MENU_LINE_WIDTH = 16;
-const MOBILE_MENU_LINE_SHORT_WIDTH = 8;
-const MOBILE_MENU_LINE_HEIGHT = 1.5;
-
-function MobileMenuIcon({ color }: { color: string }) {
-  const lineStyle = useMemo(() => [styles.mobileMenuLine, { backgroundColor: color }], [color]);
-  const shortLineStyle = useMemo(
-    () => [styles.mobileMenuLine, styles.mobileMenuLineShort, { backgroundColor: color }],
-    [color],
-  );
-  return (
-    <View style={styles.mobileMenuIcon} pointerEvents="none">
-      <View style={lineStyle} />
-      <View style={lineStyle} />
-      <View style={shortLineStyle} />
-    </View>
-  );
-}
-
-function SidebarMenuToggleButton({
-  isMobile,
-  extraMutedIdleIcon = false,
-  resolvedStyle,
-  tooltipSide = "right",
-  testID = "menu-button",
-  nativeID = "menu-button",
-}: Omit<SidebarMenuToggleProps, "style"> & {
-  isMobile: boolean;
-  extraMutedIdleIcon?: boolean;
-  resolvedStyle: StyleProp<ViewStyle>;
-}) {
-  const { theme } = useUnistyles();
-  const { t } = useTranslation();
-  const isOpen = usePanelStore((state) => selectIsAgentListOpen(state, { isCompact: isMobile }));
-  const toggleAgentListForLayout = usePanelStore((state) => state.toggleAgentListForLayout);
-  const toggleShortcutKeys = useMemo(
-    () => (getShortcutOs() === "mac" ? ["mod", "B"] : ["mod", "."]),
-    [],
-  );
-
-  const handlePress = useCallback(() => {
-    toggleAgentListForLayout({ isCompact: isMobile });
-  }, [toggleAgentListForLayout, isMobile]);
-
-  const accessibilityState = useMemo(() => ({ expanded: isOpen }), [isOpen]);
-
-  return (
-    <HeaderToggleButton
-      onPress={handlePress}
-      tooltipLabel={t("shell.menu.toggleSidebar")}
-      tooltipKeys={toggleShortcutKeys}
-      tooltipSide={tooltipSide}
-      testID={testID}
-      nativeID={nativeID}
-      style={resolvedStyle}
-      accessible
-      accessibilityRole="button"
-      accessibilityLabel={isOpen ? t("shell.menu.close") : t("shell.menu.open")}
-      accessibilityState={accessibilityState}
-    >
-      {isMobile ? (
-        <MobileMenuIcon
-          color={
-            extraMutedIdleIcon ? theme.colors.foregroundExtraMuted : theme.colors.foregroundMuted
-          }
-        />
-      ) : (
-        <PanelLeft
-          size={iconButtonChromeGlyphSize("large")}
-          strokeWidth={1.5}
-          color={
-            extraMutedIdleIcon ? theme.colors.foregroundExtraMuted : theme.colors.foregroundMuted
-          }
-        />
-      )}
-    </HeaderToggleButton>
-  );
-}
-
-export function SidebarMenuToggle({ style, ...props }: SidebarMenuToggleProps = {}) {
-  const isMobile = useIsCompactFormFactor();
-  const ownsTopLeft = useOwnsWindowChromeCorner("top-left");
-  const hasTopLeftWindowControls = useHasWindowChromeObstruction("top-left");
-  const resolvedStyle = useMemo(() => [styles.leadingToggle, style], [style]);
-  const placeholderStyle = useMemo(
-    () => [headerIconSlotStyle.slot, resolvedStyle],
-    [resolvedStyle],
-  );
-
-  if (!isMobile && !ownsTopLeft) {
-    return null;
-  }
-
-  if (!isMobile && hasTopLeftWindowControls) {
-    return (
-      <View pointerEvents="none" style={placeholderStyle}>
-        <View style={styles.desktopMenuIconSpace} />
-      </View>
-    );
-  }
-
-  return <SidebarMenuToggleButton {...props} isMobile={isMobile} resolvedStyle={resolvedStyle} />;
-}
-
-export function WindowSidebarMenuToggle({ style, ...props }: SidebarMenuToggleProps = {}) {
-  const resolvedStyle = useMemo(() => [styles.leadingToggle, style], [style]);
-  return (
-    <SidebarMenuToggleButton
-      {...props}
-      isMobile={false}
-      extraMutedIdleIcon
-      resolvedStyle={resolvedStyle}
-    />
-  );
-}
-
 export function MenuHeader({ title, rightContent, borderless }: MenuHeaderProps) {
+  const isCompact = useIsCompactFormFactor();
+  if (isCompact) {
+    return <CompactHeader navigation="menu" title={title} actions={rightContent} />;
+  }
  return (
    <ScreenHeader
      left={
@@ -158,31 +33,7 @@ export function MenuHeader({ title, rightContent, borderless }: MenuHeaderProps)
 }

 const styles = StyleSheet.create((theme) => ({
-  leadingToggle: {
-    marginLeft: {
-      xs: 0,
-      md: -theme.spacing[2],
-    },
-  },
  left: {
    gap: theme.spacing[2],
  },
-  mobileMenuIcon: {
-    width: MOBILE_MENU_LINE_WIDTH,
-    height: 12,
-    justifyContent: "space-between",
-    alignItems: "flex-start",
-  },
-  desktopMenuIconSpace: {
-    width: theme.iconSize.md,
-    height: theme.iconSize.md,
-  },
-  mobileMenuLine: {
-    width: MOBILE_MENU_LINE_WIDTH,
-    height: MOBILE_MENU_LINE_HEIGHT,
-    borderRadius: theme.borderRadius.full,
-  },
-  mobileMenuLineShort: {
-    width: MOBILE_MENU_LINE_SHORT_WIDTH,
-  },
 }));
@@ -0,0 +1,167 @@
+import { useCallback, useMemo } from "react";
+import { useTranslation } from "react-i18next";
+import { View, type StyleProp, type ViewStyle } from "react-native";
+import { StyleSheet, withUnistyles } from "react-native-unistyles";
+import { PanelLeft } from "lucide-react-native";
+import { HeaderToggleButton, headerIconSlotStyle } from "./header-toggle-button";
+import { selectIsAgentListOpen, usePanelStore } from "@/stores/panel-store";
+import { useIsCompactFormFactor } from "@/constants/layout";
+import { getShortcutOs } from "@/utils/shortcut-platform";
+import { useHasWindowChromeObstruction, useOwnsWindowChromeCorner } from "@/utils/desktop-window";
+import {
+  extraMutedIconColorMapping,
+  iconButtonChromeGlyphSize,
+  mutedIconColorMapping,
+} from "@/components/ui/icon-button-chrome";
+
+const ThemedPanelLeft = withUnistyles(PanelLeft);
+
+interface SidebarMenuToggleProps {
+  style?: StyleProp<ViewStyle>;
+  tooltipSide?: "left" | "right" | "top" | "bottom";
+  testID?: string;
+  nativeID?: string;
+}
+
+const MOBILE_MENU_LINE_WIDTH = 16;
+const MOBILE_MENU_LINE_SHORT_WIDTH = 8;
+const MOBILE_MENU_LINE_HEIGHT = 1.5;
+
+function MobileMenuIcon({ extraMuted }: { extraMuted: boolean }) {
+  const color = extraMuted ? styles.mobileMenuLineExtraMuted : styles.mobileMenuLineMuted;
+  const lineStyle = useMemo(() => [styles.mobileMenuLine, color], [color]);
+  const shortLineStyle = useMemo(
+    () => [styles.mobileMenuLine, styles.mobileMenuLineShort, color],
+    [color],
+  );
+  return (
+    <View style={styles.mobileMenuIcon} pointerEvents="none">
+      <View style={lineStyle} />
+      <View style={lineStyle} />
+      <View style={shortLineStyle} />
+    </View>
+  );
+}
+
+function SidebarMenuToggleButton({
+  isMobile,
+  extraMutedIdleIcon = false,
+  resolvedStyle,
+  tooltipSide = "right",
+  testID = "menu-button",
+  nativeID = "menu-button",
+}: Omit<SidebarMenuToggleProps, "style"> & {
+  isMobile: boolean;
+  extraMutedIdleIcon?: boolean;
+  resolvedStyle: StyleProp<ViewStyle>;
+}) {
+  const { t } = useTranslation();
+  const isOpen = usePanelStore((state) => selectIsAgentListOpen(state, { isCompact: isMobile }));
+  const toggleAgentListForLayout = usePanelStore((state) => state.toggleAgentListForLayout);
+  const toggleShortcutKeys = useMemo(
+    () => (getShortcutOs() === "mac" ? ["mod", "B"] : ["mod", "."]),
+    [],
+  );
+
+  const handlePress = useCallback(() => {
+    toggleAgentListForLayout({ isCompact: isMobile });
+  }, [toggleAgentListForLayout, isMobile]);
+
+  const accessibilityState = useMemo(() => ({ expanded: isOpen }), [isOpen]);
+
+  return (
+    <HeaderToggleButton
+      onPress={handlePress}
+      tooltipLabel={t("shell.menu.toggleSidebar")}
+      tooltipKeys={toggleShortcutKeys}
+      tooltipSide={tooltipSide}
+      testID={testID}
+      nativeID={nativeID}
+      style={resolvedStyle}
+      accessible
+      accessibilityRole="button"
+      accessibilityLabel={isOpen ? t("shell.menu.close") : t("shell.menu.open")}
+      accessibilityState={accessibilityState}
+    >
+      {isMobile ? (
+        <MobileMenuIcon extraMuted={extraMutedIdleIcon} />
+      ) : (
+        <ThemedPanelLeft
+          size={iconButtonChromeGlyphSize("large")}
+          strokeWidth={1.5}
+          uniProps={extraMutedIdleIcon ? extraMutedIconColorMapping : mutedIconColorMapping}
+        />
+      )}
+    </HeaderToggleButton>
+  );
+}
+
+export function SidebarMenuToggle({ style, ...props }: SidebarMenuToggleProps = {}) {
+  const isMobile = useIsCompactFormFactor();
+  const ownsTopLeft = useOwnsWindowChromeCorner("top-left");
+  const hasTopLeftWindowControls = useHasWindowChromeObstruction("top-left");
+  const resolvedStyle = useMemo(() => [styles.leadingToggle, style], [style]);
+  const placeholderStyle = useMemo(
+    () => [headerIconSlotStyle.slot, resolvedStyle],
+    [resolvedStyle],
+  );
+
+  if (!isMobile && !ownsTopLeft) {
+    return null;
+  }
+
+  if (!isMobile && hasTopLeftWindowControls) {
+    return (
+      <View pointerEvents="none" style={placeholderStyle}>
+        <View style={styles.desktopMenuIconSpace} />
+      </View>
+    );
+  }
+
+  return <SidebarMenuToggleButton {...props} isMobile={isMobile} resolvedStyle={resolvedStyle} />;
+}
+
+export function WindowSidebarMenuToggle({ style, ...props }: SidebarMenuToggleProps = {}) {
+  const resolvedStyle = useMemo(() => [styles.leadingToggle, style], [style]);
+  return (
+    <SidebarMenuToggleButton
+      {...props}
+      isMobile={false}
+      extraMutedIdleIcon
+      resolvedStyle={resolvedStyle}
+    />
+  );
+}
+
+const styles = StyleSheet.create((theme) => ({
+  leadingToggle: {
+    marginLeft: {
+      xs: 0,
+      md: -theme.spacing[2],
+    },
+  },
+  mobileMenuIcon: {
+    width: MOBILE_MENU_LINE_WIDTH,
+    height: 12,
+    justifyContent: "space-between",
+    alignItems: "flex-start",
+  },
+  desktopMenuIconSpace: {
+    width: theme.iconSize.md,
+    height: theme.iconSize.md,
+  },
+  mobileMenuLine: {
+    width: MOBILE_MENU_LINE_WIDTH,
+    height: MOBILE_MENU_LINE_HEIGHT,
+    borderRadius: theme.borderRadius.full,
+  },
+  mobileMenuLineMuted: {
+    backgroundColor: theme.colors.foregroundMuted,
+  },
+  mobileMenuLineExtraMuted: {
+    backgroundColor: theme.colors.foregroundExtraMuted,
+  },
+  mobileMenuLineShort: {
+    width: MOBILE_MENU_LINE_SHORT_WIDTH,
+  },
+}));
@@ -1,5 +1,13 @@
 import { router } from "expo-router";
-import { CircleGauge, FolderPlus, GitBranch, Server, Settings, X } from "lucide-react-native";
+import {
+  CircleGauge,
+  FolderPlus,
+  GitBranch,
+  Server,
+  Settings,
+  X,
+  type LucideIcon,
+} from "lucide-react-native";
 import { useTranslation } from "react-i18next";
 import { memo, useCallback, useEffect, useMemo, useRef, useState, type RefObject } from "react";
 import {
@@ -26,7 +34,8 @@ import { SidebarSeparator } from "@/components/sidebar/sidebar-separator";
 import { SidebarNavRows } from "@/components/sidebar/sidebar-nav-rows";
 import { SidebarHelpMenu } from "@/components/sidebar/sidebar-help-menu";
 import { SidebarResizeHandle } from "@/components/sidebar-resize-handle";
-import { buttonControlHeight } from "@/components/ui/control-geometry";
+import { DensityIcon } from "@/components/ui/density-icon";
+import { SidebarSectionHeader } from "@/components/sidebar/sidebar-section-header";
 import { Shortcut } from "@/components/ui/shortcut";
 import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip";
 import { HEADER_INNER_HEIGHT, useIsCompactFormFactor } from "@/constants/layout";
@@ -37,6 +46,7 @@ import {
  type SidebarProjectEntry,
  type SidebarWorkspaceEntry,
 } from "@/hooks/use-sidebar-workspaces-list";
+import { density } from "@/styles/density";
 import { useSidebarModel } from "@/components/sidebar/sidebar-model";
 import type { PinnedSidebarGroups } from "@/hooks/use-sidebar-pins";
 import { RetainedPanelActivity } from "@/components/retained-panel";
@@ -280,30 +290,25 @@ function FooterIconButton({
  onPress,
  testID,
  label,
-  icon: Icon,
+  icon,
  iconSizeAdjustment = 0,
  shortcutKeys,
-  theme,
 }: {
  onPress: () => void;
  testID: string;
  label: string;
-  icon: typeof FolderPlus;
+  icon: LucideIcon;
  /** Only for a glyph that reads larger than the others at the same size. */
  iconSizeAdjustment?: number;
  shortcutKeys?: ReturnType<typeof useShortcutKeys>;
-  theme: SidebarTheme;
  buttonRef?: RefObject<View | null>;
 }) {
-  const isCompact = useIsCompactFormFactor();
-  const iconSize = isCompact ? theme.iconSize.lg : theme.iconSize.md;
-
  return (
    <Tooltip delayDuration={300}>
      <TooltipTrigger asChild>
        <Pressable
          ref={buttonRef}
-          style={styles.footerIconButton(isCompact)}
+          style={styles.footerIconButton}
          testID={testID}
          nativeID={testID}
          collapsable={false}
@@ -313,9 +318,11 @@ function FooterIconButton({
          onPress={onPress}
        >
          {({ hovered }) => (
-            <Icon
-              size={iconSize + iconSizeAdjustment}
-              color={hovered ? theme.colors.foreground : theme.colors.foregroundMuted}
+            <DensityIcon
+              icon={icon}
+              size="md"
+              sizeAdjustment={iconSizeAdjustment}
+              color={hovered ? "foreground" : "foregroundMuted"}
            />
          )}
        </Pressable>
@@ -328,12 +335,10 @@ function FooterIconButton({
 }

 function SidebarHostPicker({
-  theme,
  label,
  onAddHost,
  onOpenHostSettings,
 }: {
-  theme: SidebarTheme;
  label: string;
  onAddHost: () => void;
  onOpenHostSettings: (serverId: string) => void;
@@ -377,7 +382,6 @@ function SidebarHostPicker({
        icon={Server}
        // Server's two boxes fill more of the square than the other glyphs.
        iconSizeAdjustment={-1}
-        theme={theme}
      />
    </HostPicker>
  );
@@ -399,7 +403,6 @@ function IconTooltipContent({
 }

 function SidebarFooter({
-  theme,
  handleOpenProject,
  handleSettings,
  labels,
@@ -407,7 +410,6 @@ function SidebarFooter({
  handleOpenHostSettings,
  onBeforeNavigate,
 }: {
-  theme: SidebarTheme;
  handleOpenProject: () => void;
  handleSettings: () => void;
  labels: {
@@ -436,11 +438,9 @@ function SidebarFooter({
            label={labels.addProject}
            icon={FolderPlus}
            shortcutKeys={newAgentKeys}
-            theme={theme}
          />
-          <SidebarUsageIcon label={labels.usage} theme={theme} />
+          <SidebarUsageIcon label={labels.usage} />
          <SidebarHostPicker
-            theme={theme}
            label={labels.hosts}
            onAddHost={handleAddHost}
            onOpenHostSettings={handleOpenHostSettings}
@@ -453,7 +453,6 @@ function SidebarFooter({
            label={labels.settings}
            icon={Settings}
            shortcutKeys={settingsKeys}
-            theme={theme}
          />
        </View>
      </View>
@@ -461,7 +460,7 @@ function SidebarFooter({
  );
 }

-function SidebarUsageIcon({ label, theme }: { label: string; theme: SidebarTheme }) {
+function SidebarUsageIcon({ label }: { label: string }) {
  const openUsage = useOpenSidebarUsage();
  return (
    <FooterIconButton
@@ -469,7 +468,6 @@ function SidebarUsageIcon({ label, theme }: { label: string; theme: SidebarTheme
      testID="sidebar-usage-icon"
      label={label}
      icon={CircleGauge}
-      theme={theme}
    />
  );
 }
@@ -612,7 +610,6 @@ function MobileSidebar({
        )}

        <SidebarFooter
-          theme={theme}
          handleOpenProject={handleOpenProject}
          handleSettings={handleSettings}
          labels={labels}
@@ -789,7 +786,6 @@ function DesktopSidebar({
        <SidebarCalloutSlot />

        <SidebarFooter
-          theme={theme}
          handleOpenProject={handleOpenProject}
          handleSettings={handleSettings}
          labels={labels}
@@ -810,21 +806,18 @@ function DesktopSidebar({

 function WorkspacesSectionHeader() {
  return (
-    <View style={styles.workspacesSectionHeader}>
-      <Text style={styles.workspacesSectionTitle}>Workspaces</Text>
-      <View style={styles.workspacesSectionActions}>
-        <Tooltip delayDuration={300}>
-          <TooltipTrigger asChild>
-            <View>
-              <SidebarDisplayPreferencesMenu />
-            </View>
-          </TooltipTrigger>
-          <TooltipContent side="bottom" align="center" offset={8}>
-            <IconTooltipContent label="Display preferences" />
-          </TooltipContent>
-        </Tooltip>
-      </View>
-    </View>
+    <SidebarSectionHeader title="Workspaces">
+      <Tooltip delayDuration={300}>
+        <TooltipTrigger asChild>
+          <View>
+            <SidebarDisplayPreferencesMenu />
+          </View>
+        </TooltipTrigger>
+        <TooltipContent side="bottom" align="center" offset={8}>
+          <IconTooltipContent label="Display preferences" />
+        </TooltipContent>
+      </Tooltip>
+    </SidebarSectionHeader>
  );
 }

@@ -855,29 +848,6 @@ const styles = StyleSheet.create((theme) => ({
  sidebarHeaderGroupBelowChrome: {
    paddingTop: 0,
  },
-  workspacesSectionHeader: {
-    flexDirection: "row",
-    alignItems: "center",
-    justifyContent: "space-between",
-    gap: theme.spacing[2],
-    // Rendered inside the scroll's listContent (paddingHorizontal spacing[2]). The title
-    // lands at spacing[2] left to align with project icons. Settings2's painted path stops
-    // inside its 14px SVG, so 4px aligns the ink rather than the SVG box to the row rail.
-    paddingLeft: theme.spacing[2],
-    paddingRight: 4,
-    paddingTop: theme.spacing[1],
-    paddingBottom: theme.spacing[1],
-  },
-  workspacesSectionTitle: {
-    color: theme.colors.foregroundMuted,
-    fontSize: theme.fontSize.sm,
-    fontWeight: theme.fontWeight.normal,
-  },
-  workspacesSectionActions: {
-    flexDirection: "row",
-    alignItems: "center",
-    gap: theme.spacing[1],
-  },
  sidebarContent: {
    flex: 1,
    minHeight: 0,
@@ -957,14 +927,14 @@ const styles = StyleSheet.create((theme) => ({
    paddingVertical: theme.spacing[1.5],
    gap: 2,
  },
-  footerIconButton: (isCompact: boolean) => ({
-    width: isCompact ? buttonControlHeight.md : buttonControlHeight.xs,
-    height: isCompact ? buttonControlHeight.md : buttonControlHeight.xs,
+  footerIconButton: {
+    width: density.iconButton,
+    height: density.iconButton,
    alignItems: "center",
    justifyContent: "center",
    paddingVertical: theme.spacing[1],
    paddingHorizontal: theme.spacing[1],
-  }),
+  },
  tooltipRow: {
    flexDirection: "row",
    alignItems: "center",
@@ -3,6 +3,71 @@ import { describe, expect, it } from "vitest";
 import { normalizeHtmlishMarkdown, splitHtmlishMarkdown } from "./html-ish";

 describe("splitHtmlishMarkdown", () => {
+  it("renders heading text beside a linked picture without literal heading tags", () => {
+    const source =
+      '<h2><a href="https://example.com/r"><picture><source srcset="https://example.com/d.svg"><img alt="Retrigger" src="https://example.com/l.svg"></picture></a>Confidence Score: 5/5</h2>';
+
+    expect(splitHtmlishMarkdown(source)).toEqual([
+      {
+        kind: "inlineImage",
+        alt: "Retrigger",
+        src: "https://example.com/l.svg",
+        href: "https://example.com/r",
+        flowsWithText: true,
+      },
+      { kind: "markdown", text: "Confidence Score: 5/5" },
+    ]);
+  });
+
+  it.each(["h1", "h2", "h3", "h4", "h5", "h6"])(
+    "keeps a mixed %s heading together after preceding markdown",
+    (heading) => {
+      const source = `Intro\n\n<${heading}><img alt="Icon" src="https://example.com/icon.svg">Caption</${heading}>\n\nOutro`;
+
+      expect(splitHtmlishMarkdown(source)).toEqual([
+        { kind: "markdown", text: "Intro\n\n" },
+        {
+          kind: "inlineImage",
+          alt: "Icon",
+          src: "https://example.com/icon.svg",
+          flowsWithText: true,
+        },
+        { kind: "markdown", text: "Caption\n\nOutro" },
+      ]);
+    },
+  );
+
+  it("preserves formatted text before and after images in a details heading", () => {
+    const source =
+      '<details><summary>More</summary><h2><strong>Before</strong><img alt="Icon" src="https://example.com/icon.svg"><em>After</em></h2></details>';
+
+    expect(splitHtmlishMarkdown(source)).toEqual([
+      {
+        kind: "details",
+        summary: "More",
+        body: "**Before***After*",
+        bodyParts: [
+          { kind: "markdown", text: "**Before**" },
+          { kind: "inlineImage", alt: "Icon", src: "https://example.com/icon.svg" },
+          { kind: "markdown", text: "*After*" },
+        ],
+      },
+    ]);
+  });
+
+  it("keeps mixed HTML headings literal in code examples", () => {
+    const heading = '<h2><img src="https://example.com/icon.svg">Caption</h2>';
+    const source = `Use \`${heading}\`\n\n\`\`\`html\n${heading}\n\`\`\``;
+
+    expect(splitHtmlishMarkdown(source)).toEqual([{ kind: "markdown", text: source }]);
+  });
+
+  it("preserves unknown wrappers around text-only headings", () => {
+    expect(splitHtmlishMarkdown("<section><h2>Heading</h2></section>")).toEqual([
+      { kind: "markdown", text: "<section>Heading</section>" },
+    ]);
+  });
+
  const inlineImageBody = [
    '<a href="#"><img alt="Priority" src="https://example.com/assets/priority.svg?v=9" align="top"></a> Spoofed browser User-Agent allows access control bypass',
    "",
@@ -391,6 +456,43 @@ describe("splitHtmlishMarkdown", () => {
    );
  });

+  it("keeps table rows after a comparison that only looks like a tag", () => {
+    const source = [
+      "| ID | Note | Status |",
+      "|---|---|---|",
+      "| a-1 | accepts 1<size<2 only | open |",
+      "| a-2 | second row | open |",
+      "",
+      "Later x -> y.",
+    ].join("\n");
+
+    expect(splitHtmlishMarkdown(source)).toEqual([{ kind: "markdown", text: source }]);
+  });
+
+  it.each(["See <https://example.com/docs> for more.", "Stop when a<b", "Keep </ b> and a <b"])(
+    "keeps %j literal because it is not HTML",
+    (source) => {
+      expect(normalizeHtmlishMarkdown(source)).toBe(source);
+    },
+  );
+
+  it.each([
+    "Call As<Integer>() before limits<DWORD>::max()",
+    "<Kbd Data-Key='K'>Ctrl</Kbd> then <Foo/>",
+  ])("echoes unknown tags in %j as written", (source) => {
+    expect(normalizeHtmlishMarkdown(source)).toBe(source);
+  });
+
+  it("rebuilds an unknown tag that a code span splits", () => {
+    expect(normalizeHtmlishMarkdown('<Tip title="`x`">hi</Tip>')).toBe("`x`<tip title>hi</Tip>");
+  });
+
+  it("still reads tags and comments next to literal angle brackets", () => {
+    expect(normalizeHtmlishMarkdown("1<n<2 <b>bold</b><!-- hidden --> 3<4")).toBe(
+      "1<n<2 **bold** 3<4",
+    );
+  });
+
  it("falls back to inert markdown when details are unclosed", () => {
    const source = "<details><summary>Open</summary>Still open";

@@ -29,6 +29,12 @@ const FENCE_LINE_RE = /^ {0,3}([`~]{3,})[^\n\r]*(?:\r?\n|$)/gm;
 const BACKTICK_RUN_RE = /`+/g;
 const SAFE_IMAGE_SRC_RE = /^(https?:\/\/|data:image\/(?:png|gif|jpe?g);base64,)/i;
 const SAFE_LINK_HREF_RE = /^(https?:\/\/|#(?:$|[\w-]))/i;
+// CommonMark open and closing tags (spec "Raw HTML"); comments are matched separately.
+const HTML_ATTRIBUTE = String.raw`\s+[A-Za-z_:][\w.:-]*(?:\s*=\s*(?:[^\s"'=<>\x60]+|'[^']*'|"[^"]*"))?`;
+const HTML_TAG_RE = new RegExp(
+  String.raw`<(?:[A-Za-z][A-Za-z0-9-]*(?:${HTML_ATTRIBUTE})*\s*\/?|\/[A-Za-z][A-Za-z0-9-]*\s*)>`,
+  "y",
+);
 const VOID_HTML_TAGS = new Set(["br", "img", "source"]);
 const MARKDOWN_TAG_WRAPPERS: Readonly<Record<string, readonly [string, string]>> = {
  b: ["**", "**"],
@@ -119,9 +125,20 @@ function splitHtmlishTokens(tokens: HtmlToken[]): MarkdownDisplayPart[] {
      continue;
    }

-    const nextDetailsIndex = findNextOpenTag(tokens, cursor + 1, "details");
-    const nextInlineImageIndex = findNextInlineImageIndex(tokens, cursor + 1);
-    const end = Math.min(nextDetailsIndex ?? tokens.length, nextInlineImageIndex ?? tokens.length);
+    if (isHeadingTag(token)) {
+      const closeIndex = findMixedHeadingClose(tokens, cursor);
+      if (closeIndex !== null) {
+        // Headings render as their contents. Split those contents together so an
+        // embedded image cannot strand the opening heading tag in a text slice.
+        for (const part of splitHtmlishTokens(tokens.slice(cursor + 1, closeIndex))) {
+          appendDisplayPart(parts, part);
+        }
+        cursor = closeIndex + 1;
+        continue;
+      }
+    }
+
+    const end = findNextDisplayPartIndex(tokens, cursor + 1) ?? tokens.length;
    appendMarkdownPart(parts, renderInlineTokens(tokens.slice(cursor, end)));
    cursor = end;
  }
@@ -253,15 +270,44 @@ function flowsWithFollowingText(tokens: HtmlToken[], start: number, end: number)
  return false;
 }

-function findNextInlineImageIndex(tokens: HtmlToken[], start: number): number | null {
+function findNextDisplayPartIndex(tokens: HtmlToken[], start: number): number | null {
  for (let index = start; index < tokens.length; index += 1) {
-    if (parseInlineImageAt(tokens, index)) {
+    if (
+      isOpenTag(tokens[index], "details") ||
+      findMixedHeadingClose(tokens, index) !== null ||
+      parseInlineImageAt(tokens, index)
+    ) {
      return index;
    }
  }
  return null;
 }

+function findMixedHeadingClose(tokens: HtmlToken[], start: number): number | null {
+  const token = tokens[start];
+  if (!isHeadingTag(token)) {
+    return null;
+  }
+  const closeIndex = findMatchingClose(tokens, start, token.name);
+  if (closeIndex === null) {
+    return null;
+  }
+  for (let index = start + 1; index < closeIndex; index += 1) {
+    if (parseInlineImageAt(tokens, index)) {
+      return closeIndex;
+    }
+  }
+  return null;
+}
+
+function appendDisplayPart(parts: MarkdownDisplayPart[], part: MarkdownDisplayPart): void {
+  if (part.kind === "markdown") {
+    appendMarkdownPart(parts, part.text);
+  } else {
+    parts.push(part);
+  }
+}
+
 function appendMarkdownPart(parts: MarkdownDisplayPart[], text: string): void {
  if (!text) {
    return;
@@ -373,14 +419,16 @@ function renderInlineTokens(tokens: HtmlToken[]): string {
    }

    const children = tokens.slice(index + 1, closeIndex);
-    output += renderHtmlTag(token, children);
+    const close = tokens[closeIndex];
+    const closeRaw = isClosingTag(close, token.name) ? close.raw : `</${token.name}>`;
+    output += renderHtmlTag(token, children, closeRaw);
    index = closeIndex;
  }

  return output;
 }

-function renderHtmlTag(token: HtmlTagToken, children: HtmlToken[]): string {
+function renderHtmlTag(token: HtmlTagToken, children: HtmlToken[], closeRaw: string): string {
  if (token.name === "a") {
    return renderLinkToken(token, children);
  }
@@ -400,7 +448,7 @@ function renderHtmlTag(token: HtmlTagToken, children: HtmlToken[]): string {
  if (token.name === "p" || token.name === "div") {
    return `\n\n${renderInlineTokens(children).trim()}\n\n`;
  }
-  return `${token.raw}${renderInlineTokens(children)}</${token.name}>`;
+  return `${token.raw}${renderInlineTokens(children)}${closeRaw}`;
 }

 function renderTableTokens(tokens: HtmlToken[]): string {
@@ -606,7 +654,15 @@ function tokenizeHtmlishMarkdown(source: string): HtmlToken[] {
 function createHtmlishTokenParser(source: string, tokens: HtmlToken[]): HtmlishTokenParser {
  let stripNextLeadingLineBreak = false;
  let skippedLength = 0;
+  let writtenLength = 0;
+  let chunkStart = 0;
  let parser!: Parser;
+  // Unknown tags render as text, so keep them as written: the parser lowercases names
+  // and rewrites attributes. A tag split by a protected range has no single slice.
+  const readRawTag = (): string | null =>
+    parser.startIndex < chunkStart
+      ? null
+      : source.slice(parser.startIndex + skippedLength, parser.endIndex + 1 + skippedLength);
  parser = new Parser(
    {
      onopentag(name, attributes, isImplied) {
@@ -620,7 +676,7 @@ function createHtmlishTokenParser(source: string, tokens: HtmlToken[]): HtmlishT
          closing: false,
          selfClosing,
          attributes,
-          raw: renderStartTag(name, attributes),
+          raw: readRawTag() ?? renderStartTag(name, attributes),
        });
      },
      onclosetag(name, isImplied) {
@@ -633,7 +689,7 @@ function createHtmlishTokenParser(source: string, tokens: HtmlToken[]): HtmlishT
          closing: true,
          selfClosing: false,
          attributes: {},
-          raw: `</${name}>`,
+          raw: readRawTag() ?? `</${name}>`,
        });
      },
      ontext(value) {
@@ -660,6 +716,8 @@ function createHtmlishTokenParser(source: string, tokens: HtmlToken[]): HtmlishT
  );
  return {
    write(chunk) {
+      chunkStart = writtenLength;
+      writtenLength += chunk.length;
      parser.write(chunk);
    },
    skip(length) {
@@ -698,7 +756,58 @@ function escapeAttribute(value: string): string {

 function getProtectedMarkdownRanges(source: string): ProtectedMarkdownRange[] {
  const fencedRanges = getFencedCodeRanges(source);
-  return mergeProtectedRanges([...fencedRanges, ...getInlineCodeRanges(source, fencedRanges)]);
+  const codeRanges = mergeProtectedRanges([
+    ...fencedRanges,
+    ...getInlineCodeRanges(source, fencedRanges),
+  ]);
+  return mergeProtectedRanges([...codeRanges, ...getLiteralAngleBracketRanges(source, codeRanges)]);
+}
+
+/**
+ * htmlparser2 reads any `<` followed by a letter as a tag and keeps collecting attributes up
+ * to the next `>`, so `1<n<2` in a table cell swallows the rows after it and an autolink loses
+ * its slashes. Hand it only what CommonMark would read as raw HTML; every other `<` is text.
+ */
+function getLiteralAngleBracketRanges(
+  source: string,
+  codeRanges: ProtectedMarkdownRange[],
+): ProtectedMarkdownRange[] {
+  const ranges: ProtectedMarkdownRange[] = [];
+  let codeIndex = 0;
+  // Reused across comment openers so unclosed comments stay linear.
+  let commentClose = -1;
+  let index = source.indexOf("<");
+
+  while (index !== -1) {
+    while ((codeRanges[codeIndex]?.end ?? Infinity) <= index) {
+      codeIndex += 1;
+    }
+    const code = codeRanges[codeIndex];
+    if (code && code.start <= index) {
+      index = source.indexOf("<", code.end);
+      continue;
+    }
+
+    let htmlEnd: number | null;
+    if (source.startsWith("<!--", index)) {
+      if (commentClose !== source.length && commentClose < index + 2) {
+        const close = source.indexOf("-->", index + 2);
+        commentClose = close === -1 ? source.length : close;
+      }
+      htmlEnd = commentClose === source.length ? null : commentClose + 3;
+    } else {
+      HTML_TAG_RE.lastIndex = index;
+      htmlEnd = HTML_TAG_RE.test(source) ? HTML_TAG_RE.lastIndex : null;
+    }
+
+    if (htmlEnd === null) {
+      ranges.push({ start: index, end: index + 1 });
+      htmlEnd = index + 1;
+    }
+    index = source.indexOf("<", htmlEnd);
+  }
+
+  return ranges;
 }

 function getFencedCodeRanges(source: string): ProtectedMarkdownRange[] {
@@ -95,6 +95,7 @@ import {
 } from "@/assistant-file-links";
 import { getCompactionMarkerLabel } from "./message-compaction-label";
 import { useAssistantImage } from "@/assistant-image/use-assistant-image";
+import { localFileSourceToPath } from "@/attachments/utils";
 import {
  AttachmentFrame,
  AttachmentLabel,
@@ -1945,7 +1946,7 @@ export const AssistantMessage = memo(function AssistantMessage({
        return (
          <AssistantMarkdownImage
            key={node.key}
-            source={String(node.attributes?.src ?? "")}
+            source={localFileSourceToPath(String(node.attributes?.src ?? ""), { decodeHref: true })}
            occurrenceKey={`${occurrenceKey}:${node.key}`}
            alt={typeof node.attributes?.alt === "string" ? node.attributes.alt : undefined}
            hasLeadingContent={hasLeadingContent}
@@ -126,9 +126,6 @@ export function ProjectEditSheet({
      onClose={handleClose}
      footer={footer}
      desktopMaxWidth={440}
-      // Bound the compact scroller to the live snap height so the footer stays
-      // on screen instead of being pushed past the bottom of the sheet.
-      sizeContentToCurrentSnapPoint
      testID="project-edit-sheet"
    >
      <Field
@@ -95,11 +95,11 @@ function CustomModelRow({

  return (
    <View style={sheetStyles.modelRow}>
-      <Text style={sheetStyles.modelTitle} numberOfLines={1}>
+      <Text style={[sheetStyles.modelTitle, sheetStyles.customModelText]} numberOfLines={1}>
        {model.label}
      </Text>
      <Text
-        style={sheetStyles.monoHint}
+        style={[sheetStyles.monoHint, sheetStyles.customModelText]}
        numberOfLines={1}
        selectable
        dataSet={CODE_SURFACE_DATASET}
@@ -762,6 +762,7 @@ const sheetStyles = StyleSheet.create((theme) => ({
  iconButton: {
    width: 28,
    height: 28,
+    flexShrink: 0,
    borderRadius: theme.borderRadius.full,
    alignItems: "center",
    justifyContent: "center",
@@ -807,6 +808,10 @@ const sheetStyles = StyleSheet.create((theme) => ({
    fontSize: theme.fontSize.base,
    flexShrink: 0,
  },
+  customModelText: {
+    flexShrink: 1,
+    minWidth: 0,
+  },
  modelRowFiller: {
    flex: 1,
  },
@@ -147,4 +147,29 @@ describe("question form card core", () => {
      Response: "custom",
    });
  });
+
+  test("keeps option previews so options can be compared", () => {
+    const questions = parseQuestionFormQuestions({
+      questions: [
+        {
+          question: "Which layout?",
+          header: "Layout",
+          options: [
+            {
+              label: "Tabs",
+              description: "One tab per section",
+              preview: "<Tabs>\n  <Tab />\n</Tabs>",
+            },
+            { label: "Single page" },
+          ],
+          multiSelect: false,
+        },
+      ],
+    });
+
+    expect(questions?.[0]?.options).toEqual([
+      { label: "Tabs", description: "One tab per section", preview: "<Tabs>\n  <Tab />\n</Tabs>" },
+      { label: "Single page", description: undefined, preview: undefined },
+    ]);
+  });
 });
@@ -1,6 +1,7 @@
 export interface QuestionOption {
  label: string;
  description?: string;
+  preview?: string;
 }

 export interface QuestionFormQuestion {
@@ -46,6 +47,7 @@ export function parseQuestionFormQuestions(input: unknown): QuestionFormQuestion
      options.push({
        label: o.label,
        description: typeof o.description === "string" ? o.description : undefined,
+        preview: readOptionalString(o, "preview"),
      });
    }
    questions.push({
@@ -10,6 +10,7 @@ import type { AgentPermissionResponse } from "@getpaseo/protocol/agent-types";
 import { isWeb } from "@/constants/platform";
 import { EditingTextInput as TextInput } from "@/components/ui/text-input";
 import type { EditingTextInputHandle } from "@/components/ui/text-input/types";
+import { ScrollableCodeSurface } from "@/components/ui/scrollable-code-surface";
 import {
  areQuestionsAnswered,
  buildQuestionFormAnswers,
@@ -29,6 +30,9 @@ interface QuestionFormCardProps {
 }

 const IS_WEB = isWeb;
+// Native previews are uncapped: inside the option's Pressable, Android never hands a
+// drag to the preview's nested scroll, so lines past a cap would be unreachable.
+const OPTION_PREVIEW_MAX_HEIGHT = IS_WEB ? 240 : undefined;

 function getQuestionInputPlaceholder({
  question,
@@ -133,6 +137,20 @@ function QuestionOptionRow({
          {option.description ? (
            <Text style={optionDescriptionStyle}>{option.description}</Text>
          ) : null}
+          {option.preview ? (
+            // Shown for every option at once so they can be compared before picking.
+            // Long lines wrap, as in Claude Code, since most previews are prose.
+            <ScrollableCodeSurface
+              tone="surface0"
+              maxHeight={OPTION_PREVIEW_MAX_HEIGHT}
+              horizontal={false}
+              selectable={false}
+              textStyle={styles.optionPreviewText}
+              testID="question-form-option-preview"
+            >
+              {option.preview}
+            </ScrollableCodeSurface>
+          ) : null}
        </View>
      </View>
    </Pressable>
@@ -704,6 +722,10 @@ const styles = StyleSheet.create((theme) => ({
    fontSize: theme.fontSize.base,
    lineHeight: 20,
  },
+  optionPreviewText: {
+    lineHeight: 20,
+    ...(isWeb ? { whiteSpace: "pre-wrap", overflowWrap: "break-word" } : null),
+  },
  selectionControl: {
    width: 18,
    height: 18,
@@ -30,6 +30,7 @@ import {
  type ActiveWorkspaceSelection,
 } from "@/stores/navigation-active-workspace-store";
 import { StyleSheet, withUnistyles } from "react-native-unistyles";
+import { density, densityIconBox } from "@/styles/density";
 import type { Theme } from "@/styles/theme";
 import type { SidebarSurfaceBackdrop } from "@/styles/surface-backdrop";
 import { getSidebarRowBackdrop } from "@/components/sidebar/sidebar-row-backdrop";
@@ -92,7 +93,7 @@ import {
  SidebarWorkspaceMenu,
 } from "@/components/sidebar/sidebar-workspace-menu";
 import { useLongPressDragInteraction } from "@/components/sidebar/use-long-press-drag-interaction";
-import { PinnedSectionHeader } from "@/components/sidebar/pinned-section-header";
+import { SidebarSectionHeader } from "@/components/sidebar/sidebar-section-header";
 import { SidebarGroupToggleRow } from "@/components/sidebar/sidebar-group-toggle-row";
 import { useLimitedSidebarGroup } from "@/components/sidebar/use-limited-sidebar-group";
 import {
@@ -114,6 +115,7 @@ import {
  SidebarWorkspaceTrailingContent,
  useSidebarWorkspaceTrailing,
 } from "@/components/sidebar/workspace-trailing";
+import { DensityIcon } from "@/components/ui/density-icon";
 import { PressHighlight } from "@/components/ui/press-highlight";
 import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip";
 import { Shortcut } from "@/components/ui/shortcut";
@@ -822,9 +824,10 @@ function NewWorkspaceGhostRow({
      {({ hovered, pressed }) => (
        <>
          <View style={styles.newWorkspaceGhostIconSlot}>
-            <ThemedPlus
-              size={14}
-              uniProps={hovered || pressed ? foregroundColorMapping : foregroundMutedColorMapping}
+            <DensityIcon
+              icon={Plus}
+              size="sm"
+              color={hovered || pressed ? "foreground" : "foregroundMuted"}
            />
          </View>
          <Text
@@ -2111,6 +2114,7 @@ function ProjectModeList({
  onToggleWorkspacePin: ToggleSidebarWorkspacePin;
  onPinnedWorkspaceReorder: (workspaces: SidebarWorkspacePlacement[]) => void;
 }) {
+  const { t } = useTranslation();
  const hasActiveHostFilter = useSidebarViewStore((state) => state.hostFilters.length > 0);
  const [creatingWorkspaceIds, setCreatingWorkspaceIds] = useState<Set<string>>(() => new Set());
  const creatingWorkspaceTimeoutsRef = useRef<Map<string, ReturnType<typeof setTimeout>>>(
@@ -2410,7 +2414,12 @@ function ProjectModeList({
    <>
      {pinnedChats.length > 0 ? (
        <View style={styles.pinnedSection} testID="sidebar-pinned-section">
-          <PinnedSectionHeader collapsed={pinnedCollapsed} onToggle={togglePinnedCollapsed} />
+          <SidebarSectionHeader
+            title={t("sidebar.pinned.title")}
+            collapsed={pinnedCollapsed}
+            onToggle={togglePinnedCollapsed}
+            testID="sidebar-pinned-section-header"
+          />
          {pinnedCollapsed ? null : (
            <>
              <DraggableList
@@ -2519,7 +2528,7 @@ const styles = StyleSheet.create((theme) => ({
  // the step in reads as belonging to that project. Padding rather than margin, so the hover and
  // pressed fills stay the same box as every other row in the sidebar.
  newWorkspaceGhostRow: {
-    minHeight: 36,
+    minHeight: density.rowHeight,
    marginBottom: theme.spacing[0.5],
    paddingVertical: theme.spacing[2],
    paddingLeft: theme.spacing[4],
@@ -2539,8 +2548,8 @@ const styles = StyleSheet.create((theme) => ({
  // The width of a workspace row's status slot, so the label lands on the same rail as the
  // titles above it.
  newWorkspaceGhostIconSlot: {
-    width: theme.iconSize.md,
-    height: theme.iconSize.md,
+    width: densityIconBox("md"),
+    height: densityIconBox("md"),
    alignItems: "center",
    justifyContent: "center",
    flexShrink: 0,
@@ -2559,7 +2568,7 @@ const styles = StyleSheet.create((theme) => ({
  },
  projectRow: {
    position: "relative",
-    minHeight: 36,
+    minHeight: density.rowHeight,
    paddingVertical: theme.spacing[2],
    paddingHorizontal: theme.spacing[2],
    borderRadius: theme.borderRadius.lg,
@@ -2681,7 +2690,7 @@ const styles = StyleSheet.create((theme) => ({
    right: theme.spacing[2],
  },
  workspaceRow: {
-    minHeight: 36,
+    minHeight: density.rowHeight,
    marginBottom: theme.spacing[0.5],
    paddingVertical: theme.spacing[2],
    paddingLeft: theme.spacing[2],
@@ -1,64 +0,0 @@
-import { useMemo } from "react";
-import { useTranslation } from "react-i18next";
-import { ChevronDown, ChevronRight } from "lucide-react-native";
-import { Pressable, Text } from "react-native";
-import { StyleSheet, withUnistyles } from "react-native-unistyles";
-import { useIsCompactFormFactor } from "@/constants/layout";
-import { isNative } from "@/constants/platform";
-import type { Theme } from "@/styles/theme";
-
-const ThemedChevronDown = withUnistyles(ChevronDown);
-const ThemedChevronRight = withUnistyles(ChevronRight);
-const foregroundMutedColorMapping = (theme: Theme) => ({
-  color: theme.colors.foregroundMuted,
-});
-
-export function PinnedSectionHeader({
-  collapsed,
-  onToggle,
-}: {
-  collapsed: boolean;
-  onToggle: () => void;
-}) {
-  const { t } = useTranslation();
-  const isCompact = useIsCompactFormFactor();
-  const accessibilityState = useMemo(() => ({ expanded: !collapsed }), [collapsed]);
-  const Chevron = collapsed ? ThemedChevronRight : ThemedChevronDown;
-
-  return (
-    <Pressable
-      accessibilityRole="button"
-      accessibilityState={accessibilityState}
-      onPress={onToggle}
-      style={styles.header}
-      testID="sidebar-pinned-section-header"
-    >
-      {({ hovered }) => (
-        <>
-          <Text style={styles.title}>{t("sidebar.pinned.title")}</Text>
-          {hovered || isNative || isCompact ? (
-            <Chevron size={12} uniProps={foregroundMutedColorMapping} />
-          ) : null}
-        </>
-      )}
-    </Pressable>
-  );
-}
-
-const styles = StyleSheet.create((theme) => ({
-  header: {
-    minHeight: 36,
-    flexDirection: "row",
-    alignItems: "center",
-    alignSelf: "flex-start",
-    gap: theme.spacing[1],
-    paddingHorizontal: theme.spacing[2],
-    paddingVertical: theme.spacing[1],
-    userSelect: "none",
-  },
-  title: {
-    color: theme.colors.foregroundMuted,
-    fontSize: theme.fontSize.sm,
-    fontWeight: theme.fontWeight.normal,
-  },
-}));
@@ -4,7 +4,8 @@ import { useTranslation } from "react-i18next";
 import { ChevronDown, ChevronRight, CircleAlert } from "lucide-react-native";
 import { ProjectIconView } from "@/components/project-icon-view";
 import { getStatusBucketLabel } from "@/hooks/sidebar-status-view-model";
-import { ICON_SIZE, type Theme } from "@/styles/theme";
+import { densityIconBox, densityIconProps } from "@/styles/density";
+import type { Theme } from "@/styles/theme";
 import type { SidebarStateBucket } from "@/utils/sidebar-agent-state";
 import {
  getProjectStatusBadgeContent,
@@ -23,6 +24,9 @@ import type { SidebarSurfaceBackdrop } from "@/styles/surface-backdrop";

 // Every surfaced status shares one badge shell, so the badge never changes size or position
 // between states. Only the thing inside it changes.
+// Matches the workspace title's lineHeight (sidebar-workspace-row-content's
+// workspaceBranchText) so the icon centers on the title rather than floating above it.
+const LEADING_SLOT_HEIGHT = 20;
 const STATUS_BADGE_SIZE = 12;
 // How far the badge overhangs the icon's bottom-right corner. Well short of half the badge:
 // centered on the corner it reads as hanging off the icon rather than sitting on it, and the
@@ -35,9 +39,8 @@ const STATUS_BADGE_OFFSET = -4;
 //
 // The filled alert occupies the full badge shell so needs-input remains more prominent than
 // the passive status dots.
-// Matches the workspace title's lineHeight (sidebar-workspace-row-content's
-// workspaceBranchText) so the icon centers on the title rather than floating above it.
-const LEADING_SLOT_HEIGHT = 20;
+const DensityProjectIconView = withUnistyles(ProjectIconView);
+const projectIconProps = densityIconProps("md", () => ({}));

 const ThemedActivityIndicator = withUnistyles(ActivityIndicator);
 const ThemedCircleAlert = withUnistyles(CircleAlert);
@@ -230,12 +233,12 @@ function ProjectIcon({
  projectViewKey: string;
 }) {
  return (
-    <ProjectIconView
+    <DensityProjectIconView
      iconDataUri={iconDataUri}
      initial={placeholderInitial}
      projectViewKey={projectViewKey}
-      size={ICON_SIZE.md}
      textStyle={styles.projectIconFallbackText}
+      uniProps={projectIconProps}
    />
  );
 }
@@ -271,11 +274,11 @@ const styles = StyleSheet.create((theme) => {

  return {
    // The slot is as tall as the title's line box, not as tall as the icon, and centers the
-    // icon inside it. Rows lay their leading visual out with alignItems:flex-start, so a
-    // 16pt slot next to a 20pt line box puts the icon 2pt above the title and the kebab —
-    // which is why the workspace status indicator is also 20 tall. Keep the two in step.
+    // icon inside it. Rows lay their leading visual out with alignItems:flex-start, so a slot
+    // only as tall as the icon puts it above the title and the kebab — which is why the
+    // workspace status indicator is as tall as `LEADING_SLOT_HEIGHT`.
    projectLeadingVisualSlot: {
-      width: theme.iconSize.md,
+      width: densityIconBox("md"),
      height: LEADING_SLOT_HEIGHT,
      flexShrink: 0,
      alignItems: "center",
@@ -284,8 +287,8 @@ const styles = StyleSheet.create((theme) => {
    // Anchors the corner badge to the icon rather than to the taller slot.
    projectIconBox: {
      position: "relative",
-      width: theme.iconSize.md,
-      height: theme.iconSize.md,
+      width: densityIconBox("md"),
+      height: densityIconBox("md"),
    },
    projectIconFallbackText: {
      fontSize: 9,
--- a/Show More
+++ b/Show More