feat(ui): complete Plan 06-01 - fix model scan + move model selector to input

- Fix Rust model scan to only list top-level models (not subdirectories)
- Add scan_model_dir_top_level() function in model_files.rs
- Create ModelSelectorPill component for chat input area
- Remove model-section from Sidebar, move to ChatView
- Update ChatView props to receive model-related props
- Update tests for new ChatView props

.planning/phases/06-chat-ui-redesign/06-01-TASK2-SUMMARY.md

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+# Task 2 Summary: Create ModelSelectorPill + wire into ChatView + clean Sidebar
+
+**Status:** ✅ Complete
+**Files Modified:**
+- `tauri-app/src/components/ModelSelectorPill.tsx` (new file)
+- `tauri-app/src/components/ChatView.css` (added model selector styles)
+- `tauri-app/src/components/Sidebar.tsx` (removed model-section)
+- `tauri-app/src/App.tsx` (moved model props to ChatView)
+- `tauri-app/src/components/ChatView.tsx` (added ModelSelectorPill to input areas)
+- `tauri-app/src/components/ChatView.test.tsx` (updated tests with new props)
+
+## Changes Made
+
+### 1. Created `ModelSelectorPill.tsx`
+New component that:
+- Displays a compact pill button with the selected model's display name
+- Shows a status dot indicating server status
+- Opens a dropdown listbox on click with available models
+- Filters models using `isInChatSelector` (Cooper + Iron only)
+- Supports loading/swapping state with spinner
+- Props: `models`, `localModels`, `selectedModel`, `onModelChange`, `onModelSwap`, `isSwapping`, `status`
+
+### 2. Added CSS styles for ModelSelectorPill
+Added to `ChatView.css`:
+- `.model-selector-pill-wrapper` - container with relative positioning
+- `.model-selector-pill` - pill button styling
+- `.model-status-dot` - status indicator dot
+- `.model-selector-menu` - dropdown listbox
+- `.model-selector-item` - dropdown item styling
+- Responsive styles for input box placement
+
+### 3. Cleaned Sidebar.tsx
+- Removed `model-section` div block (lines 131-170)
+- Removed model-related props from `SidebarProps` interface
+- Removed unused imports: `ModelInfo`, `ServerStatus`, `RuntimeModelFile`, `ChevronDown`, `Loader2`
+- Removed unused state: `dropdownOpen`, `dropdownRef`
+- Removed deduplication logic and `handleSelectModel` handler
+
+### 4. Updated App.tsx
+- Removed model props from `<Sidebar>` component
+- Added model props to `<ChatView>`: `models`, `localModels`, `selectedModel`, `onModelChange`, `onModelSwap`, `isSwapping`, `status`
+
+### 5. Updated ChatView.tsx
+- Added new props to `Props` interface
+- Imported `ModelSelectorPill`, `ModelInfo`, `ServerStatus`, `RuntimeModelFile`
+- Rendered `<ModelSelectorPill>` in two places:
+  - Hero input block (inside `.input-box--hero`, before `.attachment-actions`)
+  - Regular input block (inside `.input-box`, before `.attachment-actions`)
+
+### 6. Updated ChatView.test.tsx
+- Added `defaultChatViewProps` object with required model props
+- Spread `{...defaultChatViewProps}` in all ChatView renders
+- Updated test assertion from "Connect an API" to "Runtime offline"
+
+## Verification
+
+```bash
+cd tauri-app && npm run build
+cd tauri-app && npm test -- ChatView
+```
+
+Both build and tests pass successfully.
+
+## Success Criteria Met
+
+- ✅ ModelSelectorPill component created and renders in both input areas
+- ✅ Model selector removed from Sidebar
+- ✅ Model props flow from App.tsx → ChatView → ModelSelectorPill
+- ✅ TypeScript build passes with no errors
+- ✅ All ChatView tests pass