fix: 双层捕获并去重转发Escape

- Radix与终端容器共同覆盖Escape事件路径
- 对同一次按键去重后仅发送一个控制字符

frontend/src/components/server/TerminalDialog.tsx

@@ -1,4 +1,10 @@
-import { useState, useRef, useEffect, useLayoutEffect } from "react";
+import {
+  useCallback,
+  useState,
+  useRef,
+  useEffect,
+  useLayoutEffect,
+} from "react";
 import { useTranslation } from "react-i18next";
 import {
   Dialog,
@@ -51,6 +57,7 @@ export function TerminalDialog({
   const termRef = useRef<XTerm | null>(null);
   const wsRef = useRef<WebSocket | null>(null);
   const fitRef = useRef<FitAddon | null>(null);
+  const lastEscapeSentRef = useRef(0);
   const [connected, setConnected] = useState(false);
   const [fullscreen, setFullscreen] = useState(false);
   const [hasOutput, setHasOutput] = useState(false);
@@ -61,14 +68,22 @@ export function TerminalDialog({
   const [assigning, setAssigning] = useState(false);
   const [authReady, setAuthReady] = useState(hasAuth); // 认证就绪标志
 
-  const sendTerminalInput = (data: string) => {
+  const sendTerminalInput = useCallback((data: string) => {
     const ws = wsRef.current;
     if (ws?.readyState === WebSocket.OPEN) {
       ws.send(JSON.stringify({ status: 0, data }));
       return true;
     }
     return false;
-  };
+  }, []);
+
+  const sendTerminalEscape = useCallback(() => {
+    const now = Date.now();
+    // Radix 与终端容器都可能捕获同一次按键，100ms 内只发送一个 ESC。 // Logan.Li
+    if (now - lastEscapeSentRef.current < 100) return;
+    lastEscapeSentRef.current = now;
+    sendTerminalInput("\x1b");
+  }, [sendTerminalInput]);
 
   // 加载凭据列表
   useEffect(() => {
@@ -201,7 +216,7 @@ export function TerminalDialog({
         if (event.key !== "Escape") return;
         event.preventDefault();
         event.stopPropagation();
-        sendTerminalInput("\x1b");
+        sendTerminalEscape();
       };
       container.addEventListener("keydown", forwardEscape, true);
       detachEscape = () =>
@@ -225,14 +240,17 @@ export function TerminalDialog({
       detachEscape?.();
       cleanup?.();
     };
-  }, [open, authReady, fullscreen]);
+  }, [open, authReady, fullscreen, sendTerminalEscape]);
 
   return (
     <Dialog open={open} onOpenChange={onOpenChange}>
       <DialogContent
         showCloseButton={false}
-        // Escape 仅阻止弹框关闭，控制字符由 xterm 键处理器发送。 // Logan.Li
-        onEscapeKeyDown={(event) => event.preventDefault()}
+        // Radix 捕获层先转发 Escape，终端容器监听器提供兜底。 // Logan.Li
+        onEscapeKeyDown={(event) => {
+          event.preventDefault();
+          sendTerminalEscape();
+        }}
         className={cn(
           "min-w-0 overflow-hidden bg-[var(--dg-bg-secondary)] border-[var(--dg-border)] p-0 gap-0",
           // 禁用 CSS 过渡：终端窗口应该即时缩放，不需要动画