feat: MetonaAI Desktop 初始项目

- Electron + React + TypeScript 架构
- 三栏布局: Sidebar | ChatPanel | DetailPanel
- 9 个内置工具 (文件系统/网络/记忆/命令)
- SQLite 持久化 (better-sqlite3)
- MUI 暗色/亮色主题系统
- Agent Loop ReAct 状态机引擎
- DeepSeek / Agnes AI / Ollama Provider 适配器
- MCP 协议集成
- 系统托盘 + 全局快捷键
- Tailwind CSS v4 + Tailwind Merge
- 修复: Sidebar 缺失 TextField 导入导致黑屏

src/stores/ui-store.ts

@@ -0,0 +1,39 @@
+/**
+ * Zustand Store — UI 状态管理
+ *
+ * 主题、设置弹窗、引导向导等全局 UI 状态。
+ */
+
+import { create } from 'zustand';
+
+export type ThemeMode = 'dark' | 'light' | 'auto';
+
+interface UIState {
+  // 主题
+  theme: ThemeMode;
+  resolvedTheme: 'dark' | 'light';
+
+  // 弹窗
+  settingsOpen: boolean;
+  onboardingCompleted: boolean;
+
+  // Actions
+  setTheme: (theme: ThemeMode) => void;
+  setResolvedTheme: (theme: 'dark' | 'light') => void;
+  openSettings: () => void;
+  closeSettings: () => void;
+  setOnboardingCompleted: (completed: boolean) => void;
+}
+
+export const useUIStore = create<UIState>((set) => ({
+  theme: 'auto',
+  resolvedTheme: 'dark',
+  settingsOpen: false,
+  onboardingCompleted: false,
+
+  setTheme: (theme) => set({ theme }),
+  setResolvedTheme: (resolvedTheme) => set({ resolvedTheme }),
+  openSettings: () => set({ settingsOpen: true }),
+  closeSettings: () => set({ settingsOpen: false }),
+  setOnboardingCompleted: (completed) => set({ onboardingCompleted: completed }),
+}));