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/system/LiveMonitorDialog.tsx

@@ -14,7 +14,7 @@ import { Loader2, Maximize2, Minimize2, Monitor, X } from 'lucide-react';
 import { cn } from '@/lib/utils';
 import { attachTerminalResize, mountXterm } from '@/lib/xterm-utils';
 import { useUserStore } from '@/store';
-import { useTranslation } from 'react-i18next';
+import { TerminalLoadingOverlay } from '@/components/common/TerminalLoadingOverlay';
 
 interface SessionInfo {
   session_id: number;
@@ -33,7 +33,6 @@ interface LiveMonitorProps {
 }
 
 export function LiveMonitorDialog({ open, onOpenChange, sessionId, sessionInfo }: LiveMonitorProps) {
-  const { t } = useTranslation();
   const containerRef = useRef<HTMLDivElement>(null);
   const termRef = useRef<XTerm | null>(null);
   const fitRef = useRef<FitAddon | null>(null);
@@ -126,11 +125,11 @@ export function LiveMonitorDialog({ open, onOpenChange, sessionId, sessionInfo }
       }
     };
 
-    ws.onerror = () => setConnectError(t('aiops.wsConnectFailed'));
+    ws.onerror = () => setConnectError('WebSocket 连接失败');
 
     ws.onclose = (e) => {
       if (!didOpen) {
-        setConnectError(`连接失败 (code=${e.code}): ${e.reason || t('aiops.authOrNetwork')}`);
+        setConnectError(`连接失败 (code=${e.code}): ${e.reason || '认证失败或网络问题'}`);
       }
       setConnected(false);
       term.writeln('\r\n\x1b[33m[审计监控] 连接已断开\x1b[0m');
@@ -138,7 +137,7 @@ export function LiveMonitorDialog({ open, onOpenChange, sessionId, sessionInfo }
 
     const timeout = setTimeout(() => {
       if (!didOpen) {
-        setConnectError(t('aiops.connectTimeoutActive'));
+        setConnectError('连接超时 — 请确认已登录且有活跃会话');
         ws.close();
       }
     }, 5000);
@@ -196,14 +195,14 @@ export function LiveMonitorDialog({ open, onOpenChange, sessionId, sessionInfo }
             : { maxWidth: '960px', width: '92vw' }
         }
       >
-        <DialogTitle className="sr-only">{t('system.terminalLiveMonitor')}</DialogTitle>
-        <DialogDescription className="sr-only">{t('system.auditWebssh')}</DialogDescription>
+        <DialogTitle className="sr-only">终端实时监控</DialogTitle>
+        <DialogDescription className="sr-only">审计在线 WebSSH 会话</DialogDescription>
 
         {/* 工具栏 — 与 TerminalDialog 一致 // Logan.Li */}
         <div className="flex items-center justify-between px-4 py-2 border-b border-[var(--dg-border)]">
           <div className="flex items-center gap-2 text-sm min-w-0 flex-wrap">
             <Monitor className="h-4 w-4 dg-text-green shrink-0" />
-            <span className="text-[var(--dg-text-primary)] font-medium">{t('system.terminalLiveMonitor')}</span>
+            <span className="text-[var(--dg-text-primary)] font-medium">终端实时监控</span>
             {meta && (
               <span className="text-[var(--dg-text-muted)] truncate">
                 {meta.username} · {meta.server_name} ({meta.server_ip}) · {formatTime(meta.start_time)}
@@ -217,12 +216,12 @@ export function LiveMonitorDialog({ open, onOpenChange, sessionId, sessionInfo }
             {!connected && !connectError && (
               <Badge variant="outline" className="border-yellow-500/30 dg-text-yellow bg-yellow-500/10 text-xs">
                 <Loader2 className="h-3 w-3 animate-spin mr-1" />
-                {t('common.connecting')}
+                连接中
               </Badge>
             )}
             {connectError && (
               <Badge variant="outline" className="border-red-500/30 dg-text-red bg-red-500/10 text-xs">
-                {t('system.ldapTestFailed')}
+                连接失败
               </Badge>
             )}
           </div>
@@ -231,7 +230,7 @@ export function LiveMonitorDialog({ open, onOpenChange, sessionId, sessionInfo }
               type="button"
               onClick={() => setFullscreen(!fullscreen)}
               className="p-1.5 rounded hover:bg-[var(--dg-bg-hover)] text-[var(--dg-text-secondary)]"
-              title={fullscreen ? t('common.exitFullscreen') : t('common.fullscreen')}
+              title={fullscreen ? '退出全屏' : '全屏'}
             >
               {fullscreen ? <Minimize2 className="h-4 w-4" /> : <Maximize2 className="h-4 w-4" />}
             </button>
@@ -249,12 +248,11 @@ export function LiveMonitorDialog({ open, onOpenChange, sessionId, sessionInfo }
           <p className="text-sm dg-text-red px-4 py-2 border-b border-[var(--dg-border)]">{connectError}</p>
         )}
 
-        <div
-          ref={containerRef}
-          className="xterm-terminal-host"
-          style={{ height: fullscreen ? 'calc(100vh - 49px)' : '520px' }}
-        />
+        <div className="relative bg-[#0a0e14]" style={{ height: fullscreen ? 'calc(100vh - 49px)' : '520px' }}>
+          <div ref={containerRef} className="xterm-terminal-host h-full" />
+          <TerminalLoadingOverlay show={!connected && !connectError} label="正在连接监控..." />
+        </div>
       </DialogContent>
     </Dialog>
   );
-}
+}