fix: 修复 Ghostty 实例重复加载问题并优化终端输入逻辑

src/App.tsx

@@ -194,11 +194,13 @@ function TerminalPanel({ initialCwd, connectDelay = 0, autoFocus = false }: { in
 
 function App() {
   return (
-    <div className="grid grid-cols-2 grid-rows-2 gap-1 h-screen w-screen bg-[#1e1e1e]">
+    <div className="grid grid-cols-2 grid-rows-3 gap-1 h-screen w-screen bg-[#1e1e1e]">
       <TerminalPanel initialCwd={DEFAULT_CWD} connectDelay={0} autoFocus={true} />
-      <TerminalPanel initialCwd={DEFAULT_CWD} connectDelay={100} />
-      <TerminalPanel initialCwd={DEFAULT_CWD} connectDelay={200} />
-      <TerminalPanel initialCwd={DEFAULT_CWD} connectDelay={300} />
+      <TerminalPanel initialCwd={DEFAULT_CWD} connectDelay={500} />
+      <TerminalPanel initialCwd={DEFAULT_CWD} connectDelay={1000} />
+      <TerminalPanel initialCwd={DEFAULT_CWD} connectDelay={1500} />
+      <TerminalPanel initialCwd={DEFAULT_CWD} connectDelay={2000} />
+      <TerminalPanel initialCwd={DEFAULT_CWD} connectDelay={2500} />
     </div>
   );
 }

src/components/TerminalViewport.tsx

@@ -11,12 +11,16 @@ import { cn } from '../lib/utils';
 
 // 使用 Map 按 sessionKey 隔离 Ghostty 实例，避免多面板状态冲突
 const ghosttyInstances = new Map<string, Promise<Ghostty>>();
+let globalGhosttyLoadPromise: Promise<Ghostty> | null = null;
 
 function getGhostty(sessionKey: string): Promise<Ghostty> {
   let promise = ghosttyInstances.get(sessionKey);
   if (!promise) {
-    promise = Ghostty.load();
-    ghosttyInstances.set(sessionKey, promise);
+    if (!globalGhosttyLoadPromise) {
+      globalGhosttyLoadPromise = Ghostty.load();
+    }
+    ghosttyInstances.set(sessionKey, globalGhosttyLoadPromise);
+    promise = globalGhosttyLoadPromise;
   }
   return promise;
 }

src/lib/terminalApi.ts

@@ -654,7 +654,16 @@ export async function sendTerminalInput(
   sessionId: string,
   data: string
 ): Promise<void> {
-  // 直接使用 HTTP，避免 WebSocket 连接等待延迟
+  const globalState = getTerminalInputWsGlobalState();
+  const manager = globalState.manager;
+
+  if (manager && manager.isConnectedOrConnecting()) {
+    const sent = await manager.sendInput(sessionId, data);
+    if (sent) {
+      return;
+    }
+  }
+
   await sendTerminalInputHttp(sessionId, data);
 }