add switchable theme styles

packages/desktop/electron/main.ts

@@ -86,6 +86,28 @@ app.whenReady().then(async () => {
     currentWorkspaceCwd = cwd;
   });
 
+  // Theme sync: update window background and title bar overlay
+  const themeColors = {
+    dark: { bg: '#1e1e1e', overlay: '#1a1a1a', symbol: '#858585' },
+    light: { bg: '#ffffff', overlay: '#f5f5f5', symbol: '#666666' },
+    paper: { bg: '#f5f0e8', overlay: '#ede8de', symbol: '#7a7872' },
+  };
+
+  ipcMain.on('theme:change', (_e, theme: string) => {
+    if (!mainWindow) return;
+    const c = themeColors[theme as keyof typeof themeColors];
+    if (!c) return;
+
+    mainWindow.setBackgroundColor(c.bg);
+
+    if (process.platform === 'win32') {
+      mainWindow.setTitleBarOverlay({
+        color: c.overlay,
+        symbolColor: c.symbol,
+      });
+    }
+  });
+
   registerFsHandlers();
   registerGitHandlers();
 

packages/desktop/electron/preload.ts

@@ -31,6 +31,9 @@ const api = {
   // Workspace cwd sync (renderer -> main)
   setWorkspaceCwd: (cwd: string): void => ipcRenderer.send('workspace:setCwd', cwd),
 
+  // Theme sync (renderer -> main)
+  setTheme: (theme: string): void => ipcRenderer.send('theme:change', theme),
+
   // Git (explicit cwd)
   gitStatus: (cwd: string): Promise<unknown> => ipcRenderer.invoke('git:status', cwd),
   gitBranches: (cwd: string): Promise<string[]> => ipcRenderer.invoke('git:branches', cwd),

packages/desktop/package.json

@@ -20,7 +20,7 @@
     "react-dom": "^19.1.0",
     "react-markdown": "^10.1.0",
     "react-resizable-panels": "^2.1.7",
-    "react-virtuoso": "^4.12.6",
+    "@tanstack/react-virtual": "^3.12.6",
     "rehype-raw": "^7.0.0",
     "remark-gfm": "^4.0.1",
     "simple-git": "^3.27.0",

packages/desktop/src/App.tsx

@@ -7,6 +7,7 @@ import ErrorBoundary from './shared/ErrorBoundary';
 
 export default function App() {
   const mode = useGlobalStore((s) => s.ui.mode);
+  const theme = useGlobalStore((s) => s.ui.theme);
   const setMode = useGlobalStore((s) => s.setMode);
   const rootPath = useGlobalStore((s) => s.workspace.rootPath);
 
@@ -17,6 +18,12 @@ export default function App() {
     }
   }, [rootPath]);
 
+  // Sync theme to document and main process
+  useEffect(() => {
+    document.documentElement.dataset.theme = theme;
+    window.electronAPI?.setTheme?.(theme);
+  }, [theme]);
+
   useEffect(() => {
     const off = window.electronAPI?.onFsChange?.(() => {});
     const handler = ((e: CustomEvent<'agent' | 'ide'>) => {
@@ -31,7 +38,7 @@ export default function App() {
 
   return (
     <ErrorBoundary>
-      <div className="h-screen flex flex-col bg-[#1e1e1e] text-[#cccccc] overflow-hidden">
+      <div className="h-screen flex flex-col bg-[var(--bg-base)] text-[var(--text-primary)] overflow-hidden">
         <TitleBar />
         {/* Both layouts stay mounted; visibility toggled via display to preserve Monaco + PTY state */}
         <div className={`${mode === 'agent' ? 'flex' : 'hidden'} flex-1 flex-col overflow-hidden`}>

packages/desktop/src/TitleBar.tsx

@@ -10,15 +10,15 @@ export default function TitleBar() {
 
   return (
     <div
-      className="shrink-0 flex items-center px-3 bg-[#1a1a1a] select-none"
+      className="shrink-0 flex items-center px-3 bg-[var(--bg-card)] select-none"
       style={
         {
           height: 'env(titlebar-area-height, 36px)',
           WebkitAppRegion: 'drag',
         } as React.CSSProperties
       }
     >
-      <span className="text-[#858585] text-xs font-medium">Coding Code</span>
+      <span className="text-[var(--text-tertiary)] text-xs font-medium">Coding Code</span>
       <div
         className="flex items-center gap-0.5 ml-4"
         style={{ WebkitAppRegion: 'no-drag' } as React.CSSProperties}
@@ -27,8 +27,8 @@ export default function TitleBar() {
           onClick={() => setMode('agent')}
           className={`px-3 h-6 text-xs rounded transition-colors ${
             mode === 'agent'
-              ? 'bg-[#0e639c] text-white'
-              : 'text-[#858585] hover:text-[#cccccc] hover:bg-[#2d2d2d]'
+              ? 'bg-[var(--accent-primary)] text-[var(--text-inverse)]'
+              : 'text-[var(--text-tertiary)] hover:text-[var(--text-primary)] hover:bg-[var(--bg-hover)]'
           }`}
         >
           Agent
@@ -37,8 +37,8 @@ export default function TitleBar() {
           onClick={() => setMode('ide')}
           className={`px-3 h-6 text-xs rounded transition-colors ${
             mode === 'ide'
-              ? 'bg-[#0e639c] text-white'
-              : 'text-[#858585] hover:text-[#cccccc] hover:bg-[#2d2d2d]'
+              ? 'bg-[var(--accent-primary)] text-[var(--text-inverse)]'
+              : 'text-[var(--text-tertiary)] hover:text-[var(--text-primary)] hover:bg-[var(--bg-hover)]'
           }`}
         >
           IDE

packages/desktop/src/agent/AgentSidebar.tsx

@@ -69,12 +69,12 @@ export default function AgentSidebar() {
 
   if (sidebarCollapsed) {
     return (
-      <div className="flex flex-col items-center w-10 shrink-0 bg-[#161616] border-r border-[#222] pt-2 gap-1">
+      <div className="flex flex-col items-center w-10 shrink-0 bg-[var(--bg-sidebar)] border-r border-[var(--border-default)] pt-2 gap-1">
         <button
           type="button"
           onClick={toggleSidebar}
           title="展开侧边栏"
-          className="w-7 h-7 flex items-center justify-center text-[#555] hover:text-[#ccc] hover:bg-[#252525] rounded transition-colors"
+          className="w-7 h-7 flex items-center justify-center text-[var(--text-placeholder)] hover:text-[var(--text-primary)] hover:bg-[var(--bg-hover)] rounded transition-colors"
         >
           <ChevronRight size={16} strokeWidth={1.5} />
         </button>
@@ -83,17 +83,17 @@ export default function AgentSidebar() {
   }
 
   return (
-    <div className="flex flex-col shrink-0 bg-[#161616] border-r border-[#222] w-64 select-none">
+    <div className="flex flex-col shrink-0 bg-[var(--bg-sidebar)] border-r border-[var(--border-default)] w-64 select-none">
       {/* 顶部栏：项目名 + 收起按钮 */}
       <div className="flex items-center justify-between px-2 pt-2">
-        <span className="text-[13px] font-semibold text-[#888] truncate ml-2">
+        <span className="text-[13px] font-semibold text-[var(--text-tertiary)] truncate ml-2">
           {projectName || '项目'}
         </span>
         <button
           type="button"
           onClick={toggleSidebar}
           title="收起侧边栏"
-          className="w-7 h-7 flex items-center justify-center text-[#555] hover:text-[#ccc] hover:bg-[#252525] rounded transition-colors"
+          className="w-7 h-7 flex items-center justify-center text-[var(--text-placeholder)] hover:text-[var(--text-primary)] hover:bg-[var(--bg-hover)] rounded transition-colors"
         >
           <ChevronLeft size={16} strokeWidth={1.5} />
         </button>
@@ -104,7 +104,7 @@ export default function AgentSidebar() {
         <button
           type="button"
           onClick={() => setCurrentThread(null)}
-          className="w-full flex items-center gap-2.5 px-4 py-2.5 rounded-lg text-[14px] text-[#bbb] hover:text-white hover:bg-[#252525] transition-colors border border-[#2a2a2a] hover:border-[#3a3a3a]"
+          className="w-full flex items-center gap-2.5 px-4 py-2.5 rounded-lg text-[14px] text-[var(--text-secondary)] hover:text-[var(--text-primary)] hover:bg-[var(--bg-hover)] transition-colors border border-[var(--border-card)] hover:border-[var(--border-hover)]"
         >
           <Plus size={16} strokeWidth={1.5} />
           <span>新对话</span>
@@ -117,12 +117,12 @@ export default function AgentSidebar() {
         <NavItem icon={<Zap size={16} strokeWidth={1.5} />} label="自动化" />
       </nav>
 
-      <div className="mx-3 border-t border-[#222]" />
+      <div className="mx-3 border-t border-[var(--border-default)]" />
 
       {/* 会话列表 */}
       <div className="flex-1 overflow-y-auto py-3 min-h-0">
         <div className="px-3 pb-1.5">
-          <span className="text-[11px] font-semibold text-[#444] uppercase tracking-wider">
+          <span className="text-[11px] font-semibold text-[var(--text-disabled)] uppercase tracking-wider">
             会话
           </span>
         </div>
@@ -135,8 +135,8 @@ export default function AgentSidebar() {
             onMouseLeave={() => setHoveredThreadId(null)}
             className={`w-full text-left px-4 py-2.5 rounded-lg flex items-center gap-2 transition-colors ${
               currentThreadId === t.id
-                ? 'bg-[#0d2d4a] text-[#cde]'
-                : 'text-[#888] hover:bg-[#1c1c1c] hover:text-[#bbb]'
+                ? 'bg-[var(--bg-selected)] text-[var(--text-primary)]'
+                : 'text-[var(--text-tertiary)] hover:bg-[var(--bg-card-hover)] hover:text-[var(--text-secondary)]'
             }`}
           >
             <span className="flex-1 text-[14px] truncate">{t.title || '未命名对话'}</span>
@@ -147,7 +147,7 @@ export default function AgentSidebar() {
                   e.stopPropagation();
                   handleDelete(t.id);
                 }}
-                className="shrink-0 p-0.5 text-[#555] hover:text-red-400 transition-colors"
+                className="shrink-0 p-0.5 text-[var(--text-placeholder)] hover:text-red-400 transition-colors"
                 title="删除对话"
               >
                 <svg
@@ -168,7 +168,7 @@ export default function AgentSidebar() {
                 </svg>
               </button>
             ) : (
-              <span className="text-[12px] text-[#3a3a3a] shrink-0">
+              <span className="text-[12px] text-[var(--text-disabled)] shrink-0">
                 {relativeTime(t.updatedAt)}
               </span>
             )}
@@ -177,24 +177,24 @@ export default function AgentSidebar() {
         {threadList.length > 15 && (
           <button
             type="button"
-            className="w-full text-left px-4 py-1.5 text-[12px] text-[#3a3a3a] hover:text-[#555] transition-colors"
+            className="w-full text-left px-4 py-1.5 text-[12px] text-[var(--text-disabled)] hover:text-[var(--text-placeholder)] transition-colors"
           >
             +{threadList.length - 15} 条更多
           </button>
         )}
         {threadList.length === 0 && (
-          <div className="px-3 py-4 text-[13px] text-[#3a3a3a]">暂无对话</div>
+          <div className="px-3 py-4 text-[13px] text-[var(--text-disabled)]">暂无对话</div>
         )}
       </div>
 
-      <div className="mx-3 border-t border-[#222]" />
+      <div className="mx-3 border-t border-[var(--border-default)]" />
 
       {/* 底部 */}
       <div className="px-2 py-2.5">
         <button
           type="button"
           onClick={() => useGlobalStore.getState().setView('settings')}
-          className="w-full flex items-center gap-2 px-3 py-2 text-[13px] text-[#555] hover:text-[#ccc] hover:bg-[#252525] rounded-lg transition-colors"
+          className="w-full flex items-center gap-2 px-3 py-2 text-[13px] text-[var(--text-placeholder)] hover:text-[var(--text-primary)] hover:bg-[var(--bg-hover)] rounded-lg transition-colors"
         >
           <Settings size={16} strokeWidth={1.5} />
           <span>设置</span>
@@ -208,11 +208,11 @@ function NavItem({ icon, label, shortcut }: { icon: React.ReactNode; label: stri
   return (
     <button
       type="button"
-      className="w-full flex items-center gap-2.5 px-4 py-2 rounded-lg text-[14px] text-[#666] hover:text-[#ccc] hover:bg-[#1e1e1e] transition-colors"
+      className="w-full flex items-center gap-2.5 px-4 py-2 rounded-lg text-[14px] text-[var(--text-muted)] hover:text-[var(--text-primary)] hover:bg-[var(--bg-base)] transition-colors"
     >
       <span className="w-4 flex items-center justify-center shrink-0">{icon}</span>
       <span className="flex-1 text-left">{label}</span>
-      {shortcut && <span className="text-[11px] text-[#333]">{shortcut}</span>}
+      {shortcut && <span className="text-[11px] text-[var(--text-disabled)]">{shortcut}</span>}
     </button>
   );
 }