* perf(app): make diff line wrapping responsive on large changes
Wrapping eagerly shaped every expanded line before the viewport could paint. Estimate off-screen heights and measure rows as they enter the window, preserving the scroll anchor as geometry becomes exact. Add shared layout and browser benchmarks to track toggle latency and shaping cost.
* fix(app): preserve wrapped diff anchors across bounded relayouts
Resizing can move the viewed row outside the old materialization window. Keep its estimated wrap geometry available to anchor resolution, and measure the anchored row in the same layout pass so inaccurate estimates cannot discard the exact fragment or pixel offset.
* feat(app): give compact Changes an overview and a straight rail
Three fixes to the Explorer's Changes tab on phones, where there is no
tree rail and the diff is the only view of what changed.
No placeholder stat while the sidebar slides in. `useCheckoutDiffQuery`
reported `isLoading` only when the query was enabled and connected, so an
inactive retained panel settled on `files: []`. The comparison toolbar
summed that into "+0 -0" and the body rendered "No changes" for a diff
nobody had fetched yet, both replaced a moment later by real numbers. The
result now derives from the payload alone: no payload means loading,
whatever the query is doing. Callers already handle loading correctly, so
nothing downstream needed a special case.
Jump to file. A floating action button over the diff opens a sheet with
the same changed-files tree the desktop rail renders; tapping a file
closes the sheet and scrolls the diff there. `ChangedFilesTree` moved out
of `diff-pane.tsx` into its own module so both surfaces own one tree, and
its list is now the sheet-aware one so it scrolls with the sheet gesture
on native. `DiffDocument` takes a `contentInsetBottom` so the button
never traps the last line.
Rails on the compact header. The tab labels sat at 20dp and the close X
at 16dp while every toolbar row below them used 12dp leading and 8dp
trailing. The close button was also a hand-rolled Pressable rather than a
ToolbarButton. `paneContentToolbarTrailingPadding` now takes whether the
row's last control is a bare glyph or a framed one: a glyph's hitbox
overhangs its ink so the row pads by less than the rail, but the compact
git-actions trigger paints its own frame and was landing flush against
the screen edge. The commits header chevron moved to the depth-0 tree
rail. Desktop geometry is unchanged.
* fix(app): preserve Explorer touch targets and reset file overview
* fix(app): preserve diff selections across repaints
Header typography refreshes and height resizes changed the repaint callback
and inadvertently cleared active source selections. Keep selection updates
stable while retaining explicit source and selection-layout invalidation.
* test(app): express diff copy regression as user actions
* test(app): express file overview flows as user actions
The fixed header overlay repainted after compositor-driven scroll, so ordinary headers visibly lagged behind the diff body. Paint in-flow headers with the scrolling canvas and reserve a bounded sticky canvas pool for push-off behavior.
* fix(app): restore diff copy actions on web
The canvas-backed diff owns selection without creating a DOM range, so browser context menus cannot expose copy actions themselves. Route keyboard and context-menu actions through the renderer's canonical source selection instead.
* fix(app): harden web diff copy actions
* fix(app): default split header selection to new pane
* fix(app): isolate nested diff context menus
* fix(app): select available split diff pane
* perf(app): keep large diffs responsive
Render file headers on the canvas and bound expensive text shaping to the active viewport while preserving sticky, hover, and horizontal-scroll behavior. Let native scroll cancellation arbitrate header presses so finger scrolling cannot expand files.
* test(app): assert canvas diff header accessibility
* test(app): assert canvas diff header semantics
* fix(ci): eliminate recent cross-platform flakes
Synchronize tests on owned state instead of elapsed time or transient identities. Preserve file rename collision safety when platform file IDs are unavailable.
* fix(ci): close follow-up synchronization gaps
Keep fetches in flight through buffered-event classification, scope mock agents to navigation tests, and wait for live workspace hydration before opening agent routes.
* fix(ci): synchronize browser lifecycle boundaries
* feat(app): refine workspace pane actions
Prioritize Changes when available, keep Files useful before a selection, and reserve desktop diff clicks for selection so comments require the explicit affordance. Move the Changes shortcut to Shift+G to avoid consuming a likely copy variant.
* feat(app): improve access to workspace changes
Both advance-measurement paths measured a line by re-measuring a growing
prefix per grapheme, so one n-grapheme line shaped n^2/2 characters. The
web canvas measurer and the model fallback each carried a copy, and the
native Skia branch had the same shape via getRectsForRange(0, end) per
grapheme. Nothing caps line length client-side, so one long generated
line in a diff pinned the renderer main thread for minutes and the app
read as frozen while compositor animations kept running.
Advance measurement now has one owner in text-measurement.ts: 64-grapheme
chunks measured against an accumulated base, with chunk boundaries snapped
to shaping-safe seams so ligatures and contextual scripts keep their exact
prefix-measured widths (the xfi/Arabic contract in model.test.ts is
unchanged). A 1.2M-char line drops from a ~331-minute projection to under
a second; measurement-cost.test.ts pins the linear shaped-character
budget so the quadratic cannot come back.
Keep the last painted canvas width while a pane resize is active, then repaint during layout before the settled width reaches the screen. This avoids scaling the bitmap during the drag or on its final handoff frame.
Fast Refresh preserves refs while rerunning effects, so canceled paint requests must release their retained IDs or unseen diff regions stop rendering. Paint the final expanded body’s reserved boundary pixel because no following header owns that seam.
Reuse measured diff geometry when review controls open, keeping the interaction responsive on large changes. Preserve complete tab-track snapshots while exact content widths settle so new tabs and retained workspaces do not flash or truncate.
Keep diff headers and painted content on the same scroll clock while preserving native scrolling and independent per-file horizontal offsets.
Complete review, selection, typography, tree, and palette parity without returning line rendering to React.
Mohamed Boudra