feat: 实现 2x3 终端面板网格布局

- 抽取 TerminalPanel 组件实现多终端支持
- 使用 CSS Grid 实现 2x3 布局 (6个面板)
- 添加连接延迟错开同时连接 (0-1000ms)
- 后端添加 CORS 支持
- Vite 代理添加 WebSocket 支持

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/index.js

@@ -11,6 +11,17 @@ const __dirname = path.dirname(__filename);
 const app = express();
 const PORT = process.env.PORT || 3002;
 
+// CORS middleware
+app.use((req, res, next) => {
+  res.header('Access-Control-Allow-Origin', '*');
+  res.header('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
+  res.header('Access-Control-Allow-Headers', 'Content-Type, Accept');
+  if (req.method === 'OPTIONS') {
+    return res.status(204).send();
+  }
+  next();
+});
+
 // Middleware
 app.use(express.json({ limit: '50mb' }));
 app.use(express.text({ type: '*/*' }));

src/App.tsx

@@ -8,27 +8,26 @@ import {
   closeTerminal,
 } from './lib/terminalApi';
 import { getDefaultTheme, type TerminalTheme } from './lib/terminalTheme';
-import { useTerminalStore, type TerminalChunk } from './stores/useTerminalStore';
+import { type TerminalChunk } from './stores/useTerminalStore';
 
 const DEFAULT_CWD = '/workspace';
 const DEFAULT_FONT_SIZE = 14;
 const DEFAULT_FONT_FAMILY = 'IBM Plex Mono';
 
-function App() {
-  const [isConnected, setIsConnected] = useState(false);
-  const [isConnecting, setIsConnecting] = useState(false);
-  const [error, setError] = useState<string | null>(null);
-  const [chunks, setChunks] = useState<TerminalChunk[]>([]);
+function TerminalPanel({ initialCwd, connectDelay = 0 }: { initialCwd: string; connectDelay?: number }) {
   const [theme] = useState<TerminalTheme>(getDefaultTheme());
   const [fontSize] = useState(DEFAULT_FONT_SIZE);
   const [fontFamily] = useState(DEFAULT_FONT_FAMILY);
-  const [cwd, setCwd] = useState(DEFAULT_CWD);
-  const [inputCwd, setInputCwd] = useState(DEFAULT_CWD);
+  const [chunks, setChunks] = useState<TerminalChunk[]>([]);
+  const [isConnected, setIsConnected] = useState(false);
+  const [isConnecting, setIsConnecting] = useState(false);
+  const [error, setError] = useState<string | null>(null);
 
   const sessionIdRef = useRef<string | null>(null);
   const cleanupRef = useRef<(() => void) | null>(null);
   const nextChunkIdRef = useRef(1);
   const isMountedRef = useRef(true);
+  const hasConnectedRef = useRef(false);
 
   const handleInput = useCallback(async (data: string) => {
     const sessionId = sessionIdRef.current;
@@ -52,7 +51,13 @@ function App() {
     }
   }, []);
 
-  const connectToTerminal = useCallback(async (targetCwd: string) => {
+  useEffect(() => {
+    // Skip if already connected (e.g., React strict mode double-mount)
+    if (hasConnectedRef.current) return;
+
+    isMountedRef.current = true;
+
+    const connectToTerminal = async (targetCwd: string) => {
       // Cleanup previous session
       if (cleanupRef.current) {
         cleanupRef.current();
@@ -65,12 +70,12 @@ function App() {
         } catch {
           // Ignore cleanup errors
         }
-      sessionIdRef.current = null;
       }
 
       setIsConnecting(true);
       setError(null);
       setChunks([]);
+      sessionIdRef.current = null;
       nextChunkIdRef.current = 1;
 
       try {
@@ -93,13 +98,11 @@ function App() {
               setIsConnected(true);
               setIsConnecting(false);
             } else if (event.type === 'data' && event.data) {
-            setChunks((prev) => {
               const newChunk: TerminalChunk = {
                 id: nextChunkIdRef.current++,
-                data: event.data!,
+                data: event.data,
               };
-              return [...prev, newChunk];
-            });
+              setChunks((prev) => [...prev, newChunk]);
             } else if (event.type === 'exit') {
               setIsConnected(false);
               if (event.exitCode !== 0) {
@@ -123,51 +126,37 @@ function App() {
         setIsConnecting(false);
         setError(err instanceof Error ? err.message : 'Failed to create terminal');
       }
-  }, []);
+    };
 
-  const handleConnect = useCallback(() => {
-    if (inputCwd.trim()) {
-      setCwd(inputCwd.trim());
-      connectToTerminal(inputCwd.trim());
-    }
-  }, [inputCwd, connectToTerminal]);
-
-  const handleDisconnect = useCallback(async () => {
-    if (cleanupRef.current) {
-      cleanupRef.current();
-      cleanupRef.current = null;
-    }
-
-    if (sessionIdRef.current) {
-      try {
-        await closeTerminal(sessionIdRef.current);
-      } catch {
-        // Ignore cleanup errors
-      }
-      sessionIdRef.current = null;
-    }
-
-    setIsConnected(false);
-    setChunks([]);
-  }, []);
-
-  useEffect(() => {
-    isMountedRef.current = true;
-    connectToTerminal(DEFAULT_CWD);
+    // Apply connection delay to stagger connections
+    const delay = connectDelay > 0 ? connectDelay : 0;
+    const timeoutId = setTimeout(() => {
+      hasConnectedRef.current = true;
+      connectToTerminal(initialCwd);
+    }, delay);
 
     return () => {
+      clearTimeout(timeoutId);
       isMountedRef.current = false;
       if (cleanupRef.current) {
         cleanupRef.current();
       }
     };
-  }, [connectToTerminal]);
+  }, [initialCwd, connectDelay]);
 
   return (
-    <div className="h-screen w-screen flex flex-col bg-[#1e1e1e]">
+    <div className="h-full w-full flex flex-col bg-[#1e1e1e] border border-[#3c3c3c]">
+      {/* Panel header */}
+      <div className="px-2 py-1 bg-[#2d2d2d] text-white text-xs flex items-center justify-between border-b border-[#3c3c3c]">
+        <span className="truncate">{initialCwd}</span>
+        <span className={isConnected ? 'text-[#4caf50]' : 'text-[#808080]'}>
+          {isConnected ? 'Connected' : isConnecting ? 'Connecting...' : 'Not connected'}
+        </span>
+      </div>
+
       {/* Error message */}
       {error && (
-        <div className="px-4 py-2 bg-[#3c3c3c] text-[#f14c4c] text-sm">
+        <div className="px-2 py-1 bg-[#3c3c3c] text-[#f14c4c] text-xs">
           {error}
         </div>
       )}
@@ -176,7 +165,7 @@ function App() {
       <div className="flex-1 min-h-0">
         {isConnected ? (
           <TerminalViewport
-            sessionKey={`${cwd}-${sessionIdRef.current}`}
+            sessionKey={`${initialCwd}-${sessionIdRef.current}`}
             chunks={chunks}
             onInput={handleInput}
             onResize={handleResize}
@@ -186,17 +175,24 @@ function App() {
             autoFocus
           />
         ) : (
-          <div className="h-full flex items-center justify-center text-[#808080]">
-            {isConnecting ? 'Connecting to terminal...' : 'Click "Connect" to start a terminal session'}
+          <div className="h-full flex items-center justify-center text-[#808080] text-sm">
+            {isConnecting ? 'Connecting...' : 'Click to connect'}
           </div>
         )}
       </div>
-
-      {/* Footer */}
-      <div className="px-4 py-1 bg-[#007acc] text-white text-xs flex items-center justify-between">
-        <span>{cwd}</span>
-        <span>{isConnected ? 'Connected' : 'Not connected'}</span>
-      </div>
+    </div>
+  );
+}
+
+function App() {
+  return (
+    <div className="grid grid-cols-3 grid-rows-2 gap-1 h-screen w-screen bg-[#1e1e1e]">
+      <TerminalPanel initialCwd={DEFAULT_CWD} connectDelay={0} />
+      <TerminalPanel initialCwd={DEFAULT_CWD} connectDelay={200} />
+      <TerminalPanel initialCwd={DEFAULT_CWD} connectDelay={400} />
+      <TerminalPanel initialCwd={DEFAULT_CWD} connectDelay={600} />
+      <TerminalPanel initialCwd={DEFAULT_CWD} connectDelay={800} />
+      <TerminalPanel initialCwd={DEFAULT_CWD} connectDelay={1000} />
     </div>
   );
 }

vite.config.ts

@@ -21,6 +21,8 @@ export default defineConfig({
       '/api': {
         target: 'http://localhost:3002',
         changeOrigin: true,
+        ws: true,
+        rewrite: (path) => path,
       },
     },
   },