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/cloud/CloudBilling.tsx

@@ -20,6 +20,9 @@ import {
   RefreshCw,
   Wallet,
   Bell,
+  CloudDownload,
+  Loader2,
+  Info,
 } from 'lucide-react';
 import { toast } from 'sonner';
 import { useConfirm } from '@/components/ui/confirm-dialog';
@@ -62,6 +65,7 @@ export function CloudBilling() {
   const [editingRecord, setEditingRecord] = useState<JsonData>(null);
   const [ruleDialogOpen, setRuleDialogOpen] = useState(false);
   const [editingRule, setEditingRule] = useState<JsonData>(null);
+  const [syncing, setSyncing] = useState(false);
 
   const loadStats = useCallback(async () => {
     setStatsLoading(true);
@@ -121,6 +125,37 @@ export function CloudBilling() {
     if (activeTab === 'alerts') loadRules();
   };
 
+  // 从云账号 AK 同步昨日账单（当前支持阿里云） // Logan.Li
+  const handleSyncYesterday = async () => {
+    setSyncing(true);
+    try {
+      const res = await billingApi.sync();
+      const errs = res?.errors || [];
+      if (errs.length > 0) {
+        toast.warning(t('cloud.syncBillingPartial'), {
+          description: `${t('cloud.syncBillingResult', {
+            date: res.billing_date,
+            created: res.created,
+            updated: res.updated,
+          })}\n${errs.join('\n')}`,
+        });
+      } else {
+        toast.success(t('cloud.syncBillingSuccess'), {
+          description: t('cloud.syncBillingResult', {
+            date: res.billing_date,
+            created: res.created,
+            updated: res.updated,
+          }),
+        });
+      }
+      refreshAll();
+    } catch (e) {
+      toast.error(t('cloud.syncBillingFailed'), { description: (e as JsonData).message });
+    } finally {
+      setSyncing(false);
+    }
+  };
+
   const openAddRecord = () => {
     setEditingRecord(null);
     setRecordDialogOpen(true);
@@ -234,6 +269,17 @@ export function CloudBilling() {
       }
       actions={(
         <>
+          <Button
+            variant="outline"
+            size="sm"
+            className="dg-btn-secondary"
+            onClick={handleSyncYesterday}
+            disabled={syncing}
+            title={t('cloud.syncBillingHint')}
+          >
+            {syncing ? <Loader2 className="h-4 w-4 mr-1 animate-spin" /> : <CloudDownload className="h-4 w-4 mr-1" />}
+            {t('cloud.syncYesterday')}
+          </Button>
           <Button variant="outline" size="sm" className="dg-btn-secondary" onClick={refreshAll}>
             <RefreshCw className="h-4 w-4 mr-1" />{t('common.refresh')}
           </Button>
@@ -256,6 +302,16 @@ export function CloudBilling() {
           <PageLoading />
         ) : stats ? (
           <div className="space-y-4">
+            <div className="rounded-lg border border-[var(--dg-border)] bg-[var(--dg-bg-tertiary)]/40 p-3">
+              <div className="flex items-start gap-2 text-sm text-[var(--dg-text-secondary)]">
+                <Info className="h-4 w-4 dg-text-blue shrink-0 mt-0.5" />
+                <div className="space-y-1">
+                  <p>{t('cloud.syncBillingInfo')}</p>
+                  <p className="text-xs dg-text-muted">{t('cloud.syncBillingTiming')}</p>
+                </div>
+              </div>
+            </div>
+
             {stats.alerts?.length > 0 && (
               <div className="dg-alert-banner">
                 <div className="flex items-center gap-2 mb-3">