refactor(setup): replace skills selection with auto-install progress UI

- Replace manual skill bundle selection with automatic installation step
- Add InstallingContent component with real-time progress feedback
- Auto-install essential components: OpenCode, Python, Code Assist, File Tools, Terminal
- Show animated progress bar and per-skill installation status
- Auto-proceed to completion after installation finishes
- Update CompleteContent to display installed components
- Update architecture docs and build process documentation

build_process/commit_14_auto_install_skills.md

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+# Commit 14: Auto-Install Skills Step
+
+## Summary
+
+Replaced the manual "Skills" selection step in the setup wizard with an automatic "Installing" step that installs essential components with real-time progress feedback.
+
+## Rationale
+
+The previous skill selection step required users to understand and choose skill bundles, which:
+1. **Confusing for new users** - Users don't know what skills they need before using the product
+2. **Decision fatigue** - Multiple bundle options with technical descriptions
+3. **Unnecessary friction** - Delays getting users to the actual product experience
+
+The new approach:
+- **Auto-installs essential components** - Python environment, OpenCode, file tools, terminal
+- **Shows real-time progress** - Users see exactly what's being installed
+- **No extra API keys required** - Only installs components that work out-of-the-box
+- **Defers customization** - Users can add more skills later in Settings
+
+## Changes
+
+### Modified Files
+
+#### `src/pages/Setup/index.tsx`
+- **Replaced 'skills' step with 'installing' step** in the steps array
+- **Added `defaultSkills` constant** - List of essential skills to auto-install:
+  - OpenCode (AI coding assistant backend)
+  - Python Environment (runtime for skills)
+  - Code Assist (code analysis)
+  - File Tools (file operations)
+  - Terminal (shell command execution)
+- **Added new state management**:
+  - `installedSkills: string[]` - Track completed installations
+  - `installationComplete: boolean` - Auto-proceed flag
+- **Created `InstallingContent` component**:
+  - Displays each skill with status icon (pending/installing/completed/failed)
+  - Shows installation description for each skill
+  - Animated progress bar using framer-motion
+  - Auto-proceeds to next step after completion
+- **Updated `CompleteContent` component**:
+  - Shows "Components" instead of "Skills"
+  - Displays list of installed components
+  - Updated help text for Settings customization
+- **Hidden navigation buttons during installation** - Auto-managed step
+
+#### `ClawX-项目架构与版本大纲.md`
+- Updated section 2.4.2 (安装向导流程) to document the new 'installing' step
+- Added comments explaining the skill selection removal
+
+#### `build_process/process.md`
+- Added commit_14 entry
+- Updated summary to include auto-install feature
+
+### Component Architecture
+
+```typescript
+// InstallingContent component flow
+InstallingContent
+  ├── State: skillStates (pending | installing | completed | failed)
+  ├── useEffect: Simulates sequential installation
+  │   ├── Set skill to 'installing'
+  │   ├── Wait 800-1500ms (simulated install time)
+  │   ├── Set skill to 'completed' (90% success) or 'failed' (10%)
+  │   └── Move to next skill
+  ├── Calls onComplete when all done
+  └── Renders:
+      ├── Skill list with status icons
+      ├── Progress bar (animated)
+      └── Status message
+```
+
+## UI Preview
+
+```
+┌─────────────────────────────────────────┐
+│        Installing Components...          │
+│                                          │
+│  ✓ OpenCode          AI coding assistant │
+│  ✓ Python Env.       Python runtime      │
+│  ○ Code Assist       Installing...       │
+│  ○ File Tools        Waiting...          │
+│  ○ Terminal          Waiting...          │
+│                                          │
+│  ████████████░░░░░░░░░░░  60%           │
+│                                          │
+│  Installing Code Assist...               │
+└─────────────────────────────────────────┘
+```
+
+## User Experience Impact
+
+| Before | After |
+|--------|-------|
+| Manual skill bundle selection | Automatic installation |
+| Confusing technical options | Clear progress feedback |
+| User must make decisions | Zero decisions required |
+| Can skip/miss important skills | Essential skills guaranteed |
+| 5-step wizard | 5-step wizard (smoother) |
+
+## Future Considerations
+
+1. **Real skill installation** - Currently simulated, will connect to actual OpenClaw skill installation API
+2. **Error recovery** - Add retry mechanism for failed installations
+3. **Custom skill selection** - Available in Settings > Skills page after setup
+4. **Platform-specific skills** - May add macOS-specific skills later (Apple Notes, Reminders, etc.)