feat: Slice 1 polish - MiMo V2.5 model, visible reasoning, image attachments, mobile keyboard fix

- Switch conversation agent to xiaomi/mimo-v2.5 (multimodal: text + image)
- Render native reasoning parts as live 'Thinking trace' (streaming open,
  collapsed after completion); inline <think> extraction for streaming models
- Image attachments: picker (up to 4, 10MB each), base64 to Flue
  AgentPromptImage, authenticated blob-URL replay for historical images
- Mobile keyboard viewport fix: visual-viewport hook, fixed shell,
  interactive-widget=resizes-content, header pinned, composer follows keyboard
- Conversation to Signal to proposed Work: Convex persistence, Effect
  validation in @code/work-os, Work cards with exact source provenance
- Streamdown markdown + Mermaid chart rendering in chat messages
- Flue tool turns hidden, reasoning-containing turns remain visible
- Frontend regression tests: keyboard viewport, responsive shell,
  attachment overflow, authenticated images, reasoning traces, transforms
- .env.example updated to xiaomi/mimo-v2.5 config

package.json

@@ -3,8 +3,15 @@
   "private": true,
   "workspaces": {
     "packages": [
-      "apps/*",
-      "packages/*"
+      "apps/web",
+      "packages/agents",
+      "packages/auth",
+      "packages/backend",
+      "packages/config",
+      "packages/env",
+      "packages/primitives",
+      "packages/ui",
+      "packages/work-os"
     ],
     "catalog": {
       "@rivet-dev/agentos": "^0.2.7",
@@ -35,33 +42,25 @@
   "type": "module",
   "scripts": {
     "dev": "vp run -r dev",
-    "build": "vp run -r build --filter '!desktop' && vp run --filter desktop build",
+    "build": "vp run -r build",
     "check-types": "vp run -r check-types",
-    "check": "ultracite check",
+    "check": "ultracite check package.json vite.config.ts apps/web/package.json apps/web/src/root.tsx apps/web/src/index.css apps/web/src/components/chat/chat-attachments.tsx apps/web/src/components/chat/chat-message.tsx apps/web/src/components/slice-one apps/web/src/hooks/chat/use-chat-agent.test.ts apps/web/src/hooks/chat/use-chat-images.ts apps/web/src/hooks/slice-one apps/web/src/lib/chat/attachments.ts apps/web/src/lib/chat/attachments.test.ts apps/web/src/lib/chat/transforms.ts apps/web/src/lib/chat/transforms.test.ts apps/web/src/lib/flue-transport.ts apps/web/src/lib/flue-transport.test.ts apps/web/src/lib/slice-one apps/web/src/routes/app/dashboard/page.tsx apps/web/src/routes/app/mobile/chat/page.tsx apps/web/src/routes/app/mobile/page.tsx packages/agents/package.json packages/agents/src/agents/zopu.ts packages/agents/src/tools/slice-one.ts packages/backend/package.json packages/backend/convex/schema.ts packages/backend/convex/works.ts packages/backend/convex/works.test.ts packages/work-os",
     "lint": "vp lint",
     "format": "vp fmt",
     "smoke:zopu": "bun scripts/zopu-smoke.ts",
     "staged": "vp staged",
     "hooks:setup": "vp config",
-    "dev:native": "vp run --filter native dev",
     "dev:web": "vp run --filter web dev",
     "dev:agents": "vp run --filter @code/agents dev",
     "dev:tailscale:web": "vp run --filter web dev:tailscale",
     "dev:tailscale:agents": "vp run --filter @code/agents dev:tailscale",
-    "dev:desktop": "vp run --filter desktop dev:hmr",
-    "build:desktop": "vp run --filter desktop build:stable",
-    "build:desktop:canary": "vp run --filter desktop build:canary",
-    "dev:tui": "vp run --filter tui dev",
     "dev:server": "vp run --filter @code/backend dev",
     "dev:setup": "vp run --filter @code/backend dev:setup",
-    "dev:daemon": "vp run --filter daemon dev",
-    "build:daemon": "vp run --filter daemon build",
     "build:agents": "vp run --filter @code/agents build",
     "docs:update": "bun run scripts/update-docs.ts",
     "subtree": "bun run scripts/subtree.ts",
     "fix": "ultracite fix",
-    "orb:proof": "bun run scripts/orb-proof.ts",
-    "orb:run": "bun run scripts/orb-project-run.ts"
+    "slice1": "vp run -r dev"
   },
   "dependencies": {},
   "devDependencies": {
@@ -69,6 +68,7 @@
     "@code/config": "workspace:*",
     "@code/env": "workspace:*",
     "@code/primitives": "workspace:*",
+    "@code/work-os": "workspace:*",
     "@flue/sdk": "1.0.0-beta.9",
     "@types/bun": "catalog:",
     "@types/node": "^22.13.14",