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)

electron/utils/store.ts

@@ -0,0 +1,123 @@
+/**
+ * Persistent Storage
+ * Electron-store wrapper for application settings
+ */
+import Store from 'electron-store';
+
+/**
+ * Application settings schema
+ */
+export interface AppSettings {
+  // General
+  theme: 'light' | 'dark' | 'system';
+  language: string;
+  startMinimized: boolean;
+  launchAtStartup: boolean;
+  
+  // Gateway
+  gatewayAutoStart: boolean;
+  gatewayPort: number;
+  
+  // Update
+  updateChannel: 'stable' | 'beta' | 'dev';
+  autoCheckUpdate: boolean;
+  autoDownloadUpdate: boolean;
+  skippedVersions: string[];
+  
+  // UI State
+  sidebarCollapsed: boolean;
+  devModeUnlocked: boolean;
+  
+  // Presets
+  selectedBundles: string[];
+  enabledSkills: string[];
+  disabledSkills: string[];
+}
+
+/**
+ * Default settings
+ */
+const defaults: AppSettings = {
+  // General
+  theme: 'system',
+  language: 'en',
+  startMinimized: false,
+  launchAtStartup: false,
+  
+  // Gateway
+  gatewayAutoStart: true,
+  gatewayPort: 18789,
+  
+  // Update
+  updateChannel: 'stable',
+  autoCheckUpdate: true,
+  autoDownloadUpdate: false,
+  skippedVersions: [],
+  
+  // UI State
+  sidebarCollapsed: false,
+  devModeUnlocked: false,
+  
+  // Presets
+  selectedBundles: ['productivity', 'developer'],
+  enabledSkills: [],
+  disabledSkills: [],
+};
+
+/**
+ * Create settings store
+ */
+export const settingsStore = new Store<AppSettings>({
+  name: 'settings',
+  defaults,
+});
+
+/**
+ * Get a setting value
+ */
+export function getSetting<K extends keyof AppSettings>(key: K): AppSettings[K] {
+  return settingsStore.get(key);
+}
+
+/**
+ * Set a setting value
+ */
+export function setSetting<K extends keyof AppSettings>(
+  key: K,
+  value: AppSettings[K]
+): void {
+  settingsStore.set(key, value);
+}
+
+/**
+ * Get all settings
+ */
+export function getAllSettings(): AppSettings {
+  return settingsStore.store;
+}
+
+/**
+ * Reset settings to defaults
+ */
+export function resetSettings(): void {
+  settingsStore.clear();
+}
+
+/**
+ * Export settings to JSON
+ */
+export function exportSettings(): string {
+  return JSON.stringify(settingsStore.store, null, 2);
+}
+
+/**
+ * Import settings from JSON
+ */
+export function importSettings(json: string): void {
+  try {
+    const settings = JSON.parse(json);
+    settingsStore.set(settings);
+  } catch (error) {
+    throw new Error('Invalid settings JSON');
+  }
+}