feat(core): initialize project skeleton with Electron + React + TypeScript

Set up the complete project foundation for ClawX, a graphical AI assistant:

- Electron main process with IPC handlers, menu, tray, and gateway management
- React renderer with routing, layout components, and page scaffolding
- Zustand state management for gateway, settings, channels, skills, chat, and cron
- shadcn/ui components with Tailwind CSS and CSS variable theming
- Build tooling with Vite, electron-builder, and TypeScript configuration
- Testing setup with Vitest and Playwright
- Development configurations (ESLint, Prettier, gitignore, env example)

src/stores/settings.ts

@@ -0,0 +1,82 @@
+/**
+ * Settings State Store
+ * Manages application settings
+ */
+import { create } from 'zustand';
+import { persist } from 'zustand/middleware';
+
+type Theme = 'light' | 'dark' | 'system';
+type UpdateChannel = 'stable' | 'beta' | 'dev';
+
+interface SettingsState {
+  // General
+  theme: Theme;
+  language: string;
+  startMinimized: boolean;
+  launchAtStartup: boolean;
+  
+  // Gateway
+  gatewayAutoStart: boolean;
+  gatewayPort: number;
+  
+  // Update
+  updateChannel: UpdateChannel;
+  autoCheckUpdate: boolean;
+  autoDownloadUpdate: boolean;
+  
+  // UI State
+  sidebarCollapsed: boolean;
+  devModeUnlocked: boolean;
+  
+  // Actions
+  setTheme: (theme: Theme) => void;
+  setLanguage: (language: string) => void;
+  setStartMinimized: (value: boolean) => void;
+  setLaunchAtStartup: (value: boolean) => void;
+  setGatewayAutoStart: (value: boolean) => void;
+  setGatewayPort: (port: number) => void;
+  setUpdateChannel: (channel: UpdateChannel) => void;
+  setAutoCheckUpdate: (value: boolean) => void;
+  setAutoDownloadUpdate: (value: boolean) => void;
+  setSidebarCollapsed: (value: boolean) => void;
+  setDevModeUnlocked: (value: boolean) => void;
+  resetSettings: () => void;
+}
+
+const defaultSettings = {
+  theme: 'system' as Theme,
+  language: 'en',
+  startMinimized: false,
+  launchAtStartup: false,
+  gatewayAutoStart: true,
+  gatewayPort: 18789,
+  updateChannel: 'stable' as UpdateChannel,
+  autoCheckUpdate: true,
+  autoDownloadUpdate: false,
+  sidebarCollapsed: false,
+  devModeUnlocked: false,
+};
+
+export const useSettingsStore = create<SettingsState>()(
+  persist(
+    (set) => ({
+      ...defaultSettings,
+      
+      setTheme: (theme) => set({ theme }),
+      setLanguage: (language) => set({ language }),
+      setStartMinimized: (startMinimized) => set({ startMinimized }),
+      setLaunchAtStartup: (launchAtStartup) => set({ launchAtStartup }),
+      setGatewayAutoStart: (gatewayAutoStart) => set({ gatewayAutoStart }),
+      setGatewayPort: (gatewayPort) => set({ gatewayPort }),
+      setUpdateChannel: (updateChannel) => set({ updateChannel }),
+      setAutoCheckUpdate: (autoCheckUpdate) => set({ autoCheckUpdate }),
+      setAutoDownloadUpdate: (autoDownloadUpdate) => set({ autoDownloadUpdate }),
+      setSidebarCollapsed: (sidebarCollapsed) => set({ sidebarCollapsed }),
+      setDevModeUnlocked: (devModeUnlocked) => set({ devModeUnlocked }),
+      resetSettings: () => set(defaultSettings),
+    }),
+    {
+      name: 'clawx-settings',
+    }
+  )
+);