perf: stability and performance improvements with some minor UI issues resolved (#172)

* Stability and performance improvements. (#1)

## Changelog

### Performance Improvements

- **perf: make terminal creation cwd check async (#9)**  
  Replaced synchronous `fs.existsSync` with `fs.promises.access` in the terminal creation handler to prevent blocking the event loop.  
  Improves throughput under high load.

- **perf: optimize fuzzyMatchScore by avoiding redundant lowercasing (#8)**  
  Renamed `fuzzyMatchScore` to `fuzzyMatchScoreNormalized` and updated it to accept a pre-lowercased query, avoiding repeated string allocations.  
  Updated the call site in `searchFilesystemFiles`.  
  ~25% search performance improvement on large datasets.

- **perf: use async file read in update-install handler (#7)**  
  Replaced `fs.readFileSync` with `await fs.promises.readFile` to avoid blocking the event loop.  

  **Benchmark (10k ops):**
  - Sync: ~95ms (blocking)  
  - Async: ~1124ms (non-blocking)  

  Higher per-call overhead, but better server responsiveness.

- **perf(server): optimize mkdir endpoint with async fs (#6)**  
  Replaced `fs.mkdirSync` with `await fsPromises.mkdir` in `/api/fs/mkdir`.  
  Prevents event-loop blocking and improves concurrent performance.  

  **Result:** ~2× throughput improvement (100 concurrent requests).

- **perf: parallelize fs checks in validateProjectEntries (#4)**  
  Replaced serial `for...of` with `Promise.all + map`.  
  Reduced validation time for 500 projects from ~110ms to ~20ms (~5× speedup).

- **perf: cache getLoginShellPath result to avoid blocking event loop (#5)**  
  Cached `getLoginShellPath` result to avoid repeated `spawnSync` calls (~400ms each).  
  Subsequent calls reduced to <1ms.

---

### Server Fixes

- **fix(server): use async check for terminal restart endpoint (#3)**  
  Replaced `fs.existsSync` with `fs.promises.stat` in `/api/terminal/:sessionId/restart`.  
  Added directory validation for better robustness.

---

### UI & Accessibility

- **feat(ui): add aria-labels to git identities sidebar buttons (#1)**  
  - Added `aria-label="Create new profile"` to the create button  
  - Added `aria-label="Profile actions"` to the dropdown trigger  
  - Added `.Jules/palette.md` for UX/a11y learnings

---

### UI Performance (Bolt)

- **⚡ Bolt: Optimize MessageList re-renders by preserving referential equality (#2)**
- **⚡ Bolt: Optimize MessageList re-renders by preserving referential equality (#11)**
- **⚡ Bolt: Optimize MessageList re-renders by preserving referential equality (#12)**

* stability and improvements (#17)

* feat: add corner radius setting and update snackbar actions

- Add `cornerRadius` to UI store and settings.
- Add Corner Radius slider to Visual Settings section.
- Apply corner radius to ChatInput component.
- Remove default close button from Snackbar (Sonner).
- Add "OK" action button to session deletion toasts.
- Ensure `cornerRadius` setting is visible in OpenChamberPage.

* fix(ui): add missing aria-label to radius slider and verify functionality

- Added `aria-label="Corner radius in pixels"` to the desktop version of the corner radius slider for accessibility.
- Verified functionality and accessibility compliance via script.

* fix(ui): restore input bar offset setting on desktop

- Restored the Input Bar Offset setting to be visible on desktop, not just mobile.
- Verified both Corner Radius and Input Bar Offset sliders are accessible.

* Fix mobile layout for chat input controls (#16)

* Fix mobile layout for chat input controls

- Reduced horizontal gaps in mobile model controls.
- Added max-width constraints to model, variant, and agent labels on mobile to prevent overflow and cramping.
- Optimized spacing for mobile view.

* feat(git): auto-select gitmoji for generated commit messages

When the "Generate commit message" feature is used and gitmoji is enabled, automatically prepend the appropriate gitmoji based on the commit subject keywords.

- Added `KEYWORD_MAP` to map commit types to gitmojis.
- Added `matchGitmojiFromSubject` helper.
- Updated `handleGenerateCommitMessage` to apply the gitmoji.

* feat(git): auto-select gitmoji for generated commit messages

- Added `KEYWORD_MAP` to map commit types to gitmojis.
- Added `matchGitmojiFromSubject` helper.
- Updated `handleGenerateCommitMessage` to apply the gitmoji.
- Fixed mobile layout for model controls.

packages/ui/src/stores/useUIStore.ts

@@ -44,6 +44,7 @@ interface UIStore {
   toolCallExpansion: 'collapsed' | 'activity' | 'detailed';
   fontSize: number;
   padding: number;
+  cornerRadius: number;
   inputBarOffset: number;
 
   favoriteModels: Array<{ providerID: string; modelID: string }>;
@@ -85,6 +86,7 @@ interface UIStore {
   setToolCallExpansion: (value: 'collapsed' | 'activity' | 'detailed') => void;
   setFontSize: (size: number) => void;
   setPadding: (size: number) => void;
+  setCornerRadius: (radius: number) => void;
   setInputBarOffset: (offset: number) => void;
   setKeyboardOpen: (open: boolean) => void;
   applyTypography: () => void;
@@ -137,6 +139,7 @@ export const useUIStore = create<UIStore>()(
         toolCallExpansion: 'collapsed',
         fontSize: 100,
         padding: 100,
+        cornerRadius: 12,
         inputBarOffset: 0,
         favoriteModels: [],
         recentModels: [],
@@ -294,6 +297,10 @@ export const useUIStore = create<UIStore>()(
           get().applyPadding();
         },
 
+        setCornerRadius: (radius) => {
+          set({ cornerRadius: radius });
+        },
+
         applyTypography: () => {
           const { fontSize } = get();
           const root = document.documentElement;
@@ -506,6 +513,7 @@ export const useUIStore = create<UIStore>()(
           toolCallExpansion: state.toolCallExpansion,
           fontSize: state.fontSize,
           padding: state.padding,
+          cornerRadius: state.cornerRadius,
           favoriteModels: state.favoriteModels,
           recentModels: state.recentModels,
           diffLayoutPreference: state.diffLayoutPreference,