feat(rdp): 新增 RDP 远程桌面/SMB/账单同步能力 + 清理编译产物

主要变更：
- RDP 远程桌面：新增 backend/pkg/rdp（RDP 引擎 + credssp/display/rle/trace）、
  backend/controller/rdp*（连接/凭证/文件/会话/实时）、frontend RDP 组件与 API
- Windows SMB 文件传输：backend/pkg/winsmb
- 云账单同步：backend/pkg/billingsync + billing_sync/aliyun_billing，前端账单详情
- Agent CLI Kubernetes 工具：kubernetes_action/get、pod_execute/logs
- 服务器导入助手：server_import_helpers、ImportCredentialSettings
- 国际化与组件重构（cloud/deploy/monitor/server/system 等多模块）
- 清理编译产物二进制：移除 backend/server、backend/agent/bin/aiops-agent-*
- .gitignore：新增 backend/agent/ 与 .cache/（避免 334MB go-build 缓存误入库）

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

frontend/src/components/server/WebShell.tsx

@@ -29,10 +29,11 @@ import {
 import { Terminal as XTerm } from 'xterm';
 import { FitAddon } from 'xterm-addon-fit';
 import 'xterm/css/xterm.css';
+import { attachTerminalResize, fitTerminal, mountXterm } from '@/lib/xterm-utils';
+import { TerminalLoadingOverlay } from '@/components/common/TerminalLoadingOverlay';
 import { serverApi } from '@/api';
 import { useUserStore } from '@/store';
 import type { JsonData } from '@/types/common';
-import i18n from '@/i18n';
 
 interface TerminalSession {
   id: string;
@@ -40,6 +41,7 @@ interface TerminalSession {
   serverName: string;
   serverIp: string;
   connected: boolean;
+  ready: boolean;
 }
 
 interface TermEntry {
@@ -47,6 +49,7 @@ interface TermEntry {
   ws: WebSocket;
   fit: FitAddon;
   opened: boolean;
+  resizeCleanup?: () => void;
 }
 
 export function WebShell() {
@@ -67,7 +70,7 @@ export function WebShell() {
       const res: JsonData = await serverApi.getServers();
       setServers(res?.list || []);
     } catch (e) {
-      console.error(i18n.t('server.webshelltsx.s8603ff5b'), e);
+      console.error('加载服务器列表失败:', e);
       setServers([]);
     }
   };
@@ -79,8 +82,9 @@ export function WebShell() {
   // 卸载时关闭所有连接
   useEffect(() => {
     return () => {
-      termsRef.current.forEach(({ ws, term }) => {
+      termsRef.current.forEach(({ ws, term, resizeCleanup }) => {
         try {
+          resizeCleanup?.();
           ws.close();
           term.dispose();
         } catch {
@@ -135,10 +139,12 @@ export function WebShell() {
       try {
         const msg = JSON.parse(event.data);
         if (msg.status === 0 && typeof msg.data === 'string') {
+          setSessions((prev) => prev.map((s) => (s.id === sessionId ? { ...s, ready: true } : s)));
           term.write(msg.data);
         }
       } catch {
         // 非 JSON，直接写入原始数据
+        setSessions((prev) => prev.map((s) => (s.id === sessionId ? { ...s, ready: true } : s)));
         term.write(typeof event.data === 'string' ? event.data : '');
       }
     };
@@ -148,14 +154,15 @@ export function WebShell() {
     };
 
     ws.onclose = () => {
-      term.write(i18n.t('server.terminaldialogt.safab2019'));
+      term.write('\r\n\x1b[31m[连接已关闭]\x1b[0m\r\n');
       setSessions((prev) =>
-        prev.map((s) => (s.id === sessionId ? { ...s, connected: false } : s))
+        prev.map((s) => (s.id === sessionId ? { ...s, connected: false, ready: true } : s))
       );
     };
 
     ws.onerror = () => {
-      term.write(i18n.t('kubernetes.podexecterminal.sc8107726'));
+      setSessions((prev) => prev.map((s) => (s.id === sessionId ? { ...s, ready: true } : s)));
+      term.write('\r\n\x1b[31m[连接发生错误]\x1b[0m\r\n');
     };
 
     termsRef.current.set(sessionId, { term, ws, fit, opened: false });
@@ -166,6 +173,7 @@ export function WebShell() {
       serverName: server.hostname,
       serverIp: server.ip,
       connected: true,
+      ready: false,
     };
     setSessions((prev) => [...prev, newSession]);
     setActiveSession(sessionId);
@@ -177,6 +185,7 @@ export function WebShell() {
     const entry = termsRef.current.get(sessionId);
     if (entry) {
       try {
+        entry.resizeCleanup?.();
         if (entry.ws.readyState === WebSocket.OPEN || entry.ws.readyState === WebSocket.CONNECTING) {
           entry.ws.close();
         }
@@ -201,12 +210,7 @@ export function WebShell() {
       const entry = termsRef.current.get(activeSession);
       if (!entry || !entry.opened) return;
       try {
-        entry.fit.fit();
-        const { cols, rows } = entry.term;
-        entry.term.resize(cols, rows);
-        if (entry.ws.readyState === WebSocket.OPEN) {
-          entry.ws.send(JSON.stringify({ status: 1, cols, rows }));
-        }
+        fitTerminal(entry.fit, entry.term, entry.ws);
       } catch {
         /* noop */
       }
@@ -222,7 +226,7 @@ export function WebShell() {
     if (entry && entry.opened) {
       requestAnimationFrame(() => {
         try {
-          entry.fit.fit();
+          fitTerminal(entry.fit, entry.term, entry.ws);
           entry.term.focus();
         } catch {
           /* noop */
@@ -248,27 +252,16 @@ export function WebShell() {
       const entry = termsRef.current.get(sessionId);
       if (entry && !entry.opened) {
         try {
-          entry.term.open(el);
+          mountXterm(entry.term, entry.fit, () => el, entry.ws);
           entry.opened = true;
-          // 延迟适配：等 DOM 布局完全确定
-          setTimeout(() => {
-            try { entry.fit.fit(); entry.term.focus(); } catch { /* noop */ }
-          }, 100);
-          // ResizeObserver 持续监听容器大小变化
-          const observer = new ResizeObserver(() => {
-            try { entry.fit.fit(); } catch { /* noop */ }
-          });
-          observer.observe(el);
-          (entry as JsonData)._observer = observer;
+          entry.resizeCleanup = attachTerminalResize(el, entry.fit, entry.term, entry.ws);
         } catch (e) {
-          console.error(i18n.t('server.webshelltsx.s7d4b03bb'), e);
+          console.error('打开终端失败:', e);
         }
       }
     } else {
       const entry = termsRef.current.get(sessionId);
-      if (entry && (entry as JsonData)._observer) {
-        (entry as JsonData)._observer.disconnect();
-      }
+      entry?.resizeCleanup?.();
       containerRef.current.delete(sessionId);
     }
   };
@@ -283,7 +276,7 @@ export function WebShell() {
         <div className="flex items-center justify-between">
           <div>
             <h1 className="text-2xl font-bold text-[var(--dg-text-primary)]">WebShell</h1>
-            <p className="text-sm text-[var(--dg-text-secondary)] mt-1"> {i18n.t('server.webshelltsx.s1df74087')} </p>
+            <p className="text-sm text-[var(--dg-text-secondary)] mt-1">远程服务器终端管理</p>
           </div>
           <div className="flex items-center gap-2">
             <Dialog open={dialogOpen} onOpenChange={setDialogOpen}>
@@ -295,21 +288,21 @@ export function WebShell() {
               </DialogTrigger>
               <DialogContent className="bg-[var(--dg-bg-secondary)] border-[var(--dg-border)]">
                 <DialogHeader>
-                  <DialogTitle className="text-[var(--dg-text-primary)]"> {i18n.t('server.webshelltsx.s7026b318')} </DialogTitle>
+                  <DialogTitle className="text-[var(--dg-text-primary)]">新建终端连接</DialogTitle>
                   <DialogDescription className="text-[var(--dg-text-secondary)]">
                     选择要连接的服务器
                   </DialogDescription>
                 </DialogHeader>
                 <div className="space-y-4 py-4">
                   <div className="space-y-2">
-                    <label className="text-sm font-medium text-[var(--dg-text-secondary)]"> {i18n.t('server.webshelltsx.s030235d1')} </label>
+                    <label className="text-sm font-medium text-[var(--dg-text-secondary)]">选择服务器</label>
                     <Select value={selectedServer} onValueChange={setSelectedServer}>
                       <SelectTrigger className="bg-[var(--dg-bg-tertiary)] border-[var(--dg-border)] text-[var(--dg-text-primary)]">
-                        <SelectValue placeholder={i18n.t('server.webshelltsx.s030235d1')} />
+                        <SelectValue placeholder="选择服务器" />
                       </SelectTrigger>
                       <SelectContent className="bg-[var(--dg-bg-tertiary)] border-[var(--dg-border)]">
                         {runningServers.length === 0 ? (
-                          <SelectItem value="__none" disabled> {i18n.t('server.webshelltsx.se5460be8')} </SelectItem>
+                          <SelectItem value="__none" disabled>暂无运行中的服务器</SelectItem>
                         ) : (
                           runningServers.map((server) => (
                             <SelectItem key={server.id} value={server.id}>
@@ -379,7 +372,7 @@ export function WebShell() {
                   ))}
                 </div>
               ) : (
-                <span className="text-sm text-[var(--dg-text-secondary)]"> {i18n.t('server.webshelltsx.sd5d6cbbb')} </span>
+                <span className="text-sm text-[var(--dg-text-secondary)]">暂无连接</span>
               )}
             </div>
             <div className="flex items-center gap-1">
@@ -407,12 +400,19 @@ export function WebShell() {
                   key={session.id}
                   ref={(el) => registerContainer(session.id, el)}
                   className={cn(
-                    'absolute inset-0',
+                    'absolute inset-0 xterm-terminal-host',
                     activeSession === session.id ? 'block' : 'hidden'
                   )}
                   style={{ padding: 0 }}
                 />
               ))}
+              {sessions.map((session) => (
+                <TerminalLoadingOverlay
+                  key={`${session.id}-loading`}
+                  show={activeSession === session.id && !session.ready}
+                  label="正在登录..."
+                />
+              ))}
             </div>
           ) : (
             <div
@@ -420,8 +420,8 @@ export function WebShell() {
               style={{ height: terminalHeight }}
             >
               <Terminal className="h-16 w-16 mb-4 opacity-50" />
-              <p className="text-lg font-medium"> {i18n.t('server.webshelltsx.sefd92a06')} </p>
-              <p className="text-sm mt-1"> {i18n.t('server.webshelltsx.se2e43347')} </p>
+              <p className="text-lg font-medium">暂无活动连接</p>
+              <p className="text-sm mt-1">点击“新建连接”开始远程会话</p>
             </div>
           )}
         </CardContent>
@@ -431,7 +431,7 @@ export function WebShell() {
       {activeSessionData && (
         <Card className="bg-[var(--dg-bg-secondary)] border-[var(--dg-border)]">
           <CardHeader className="pb-2">
-            <CardTitle className="text-sm text-[var(--dg-text-secondary)]"> {i18n.t('server.webshelltsx.sde027789')} </CardTitle>
+            <CardTitle className="text-sm text-[var(--dg-text-secondary)]">快捷命令</CardTitle>
           </CardHeader>
           <CardContent>
             <div className="flex flex-wrap gap-2">