feat(update): implement auto-update functionality with electron-updater

- Add AppUpdater module with update lifecycle management
- Create UpdateSettings UI component with progress display
- Add Progress UI component based on Radix UI
- Create update Zustand store for state management
- Register update IPC handlers in main process
- Auto-check for updates on production startup
- Add commit documentation for commits 2-6

build_process/commit_2_gateway_refinements.md

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+# Commit 2: Gateway Refinements
+
+## Summary
+Enhance Gateway process management with auto-reconnection, health checks, and improved state management for more robust WebSocket communication.
+
+## Changes
+
+### Electron Main Process
+
+#### `electron/gateway/manager.ts`
+- Added `'reconnecting'` state to `GatewayStatus`
+- Implemented `ReconnectConfig` with exponential backoff strategy
+- Added `maxAttempts`, `baseDelay`, `maxDelay` configuration
+- New methods:
+  - `isConnected()` - Check WebSocket connection status
+  - `restart()` - Stop and start Gateway
+  - `clearAllTimers()` - Clean up timers on shutdown
+  - `startHealthCheck()` - Periodic health monitoring
+  - `checkHealth()` - Manual health check
+- Enhanced `handleMessage()` to dispatch JSON-RPC responses and notifications
+- Expanded `GatewayManagerEvents` for notification forwarding
+
+#### `electron/gateway/client.ts`
+- Extended with new interfaces: `SkillBundle`, `CronTask`, `ProviderConfig`
+- Added cron task management methods:
+  - `listCronTasks()`, `createCronTask()`, `updateCronTask()`, `deleteCronTask()`, `runCronTask()`
+- Added provider management methods:
+  - `listProviders()`, `setProvider()`, `removeProvider()`, `testProvider()`
+- Enhanced system calls:
+  - `getHealth()` now includes `version`
+  - Added `getVersion()`, `getSkillBundles()`, `installBundle()`
+
+#### `electron/main/ipc-handlers.ts`
+- Added `gateway:isConnected`, `gateway:health` IPC handlers
+- Added `mainWindow.isDestroyed()` checks before sending events
+- Forward new gateway events: `gateway:notification`, `gateway:channel-status`, `gateway:chat-message`
+
+#### `electron/preload/index.ts`
+- Added new IPC channels for gateway operations
+- Added notification event channels
+
+### React Renderer
+
+#### `src/stores/gateway.ts`
+- Added `health: GatewayHealth | null`, `lastError: string | null` to state
+- Added `checkHealth()`, `rpc()`, `clearError()` actions
+- Enhanced `init()` to listen for error and notification events
+
+#### `src/types/gateway.ts`
+- Added `'reconnecting'` to `GatewayStatus` state enum
+- Added `version`, `reconnectAttempts` fields
+- New interfaces: `GatewayHealth`, `GatewayNotification`, `ProviderConfig`
+
+#### `src/components/common/StatusBadge.tsx`
+- Added `'reconnecting'` status with warning variant
+
+## Technical Details
+
+### Reconnection Strategy
+- Exponential backoff: `delay = min(baseDelay * 2^attempt, maxDelay)`
+- Default: 1s base delay, 30s max delay, 10 max attempts
+- Automatic reconnection on unexpected disconnection
+- Manual control via `shouldReconnect` flag
+
+### Health Check
+- Periodic ping/pong via JSON-RPC `system.health`
+- Returns status, uptime, version information
+- Triggers reconnection on consecutive failures
+
+### Event Flow
+```
+Gateway Process -> WebSocket -> GatewayManager -> IPC -> Renderer
+                                    |
+                                    v
+                              Event Emitter
+                                    |
+                    +---------------+---------------+
+                    |               |               |
+                 status        notification     channel:status
+```
+
+## Version
+v0.1.0-alpha (incremental)