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>

backend/controller/agent_cli_api.go

@@ -10,10 +10,11 @@ import (
 
 	"ezops/middleware"
 	"ezops/model"
+	"ezops/pkg/agentcli"
 )
 
 // ListSessions 会话列表（按当前用户隔离） // Logan.Li
-// GET /api/v1/aiops/agent-cli/sessions?server_id=&page=&page_size=
+// GET /api/v1/aiops/agent-cli/sessions?mode=&server_id=&cluster_id=&namespace=&page=&page_size=
 func (h *AgentCLIHandler) ListSessions(c *gin.Context) {
 	uid := middleware.GetUserID(c)
 	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
@@ -26,9 +27,23 @@ func (h *AgentCLIHandler) ListSessions(c *gin.Context) {
 	}
 
 	q := h.db.Model(&model.AgentCLISession{}).Where("user_id = ?", uid)
+	if mode := c.Query("mode"); mode != "" {
+		mode = agentcli.NormalizeRunMode(mode)
+		if mode == agentcli.RunModeKubernetes {
+			q = q.Where("mode IN ?", []string{agentcli.RunModeKubernetes, "k8s"})
+		} else {
+			q = q.Where("mode = ?", mode)
+		}
+	}
 	if sid := c.Query("server_id"); sid != "" {
 		q = q.Where("server_id = ?", sid)
 	}
+	if cid := c.Query("cluster_id"); cid != "" {
+		q = q.Where("cluster_id = ?", cid)
+	}
+	if ns := c.Query("namespace"); ns != "" {
+		q = q.Where("namespace = ?", ns)
+	}
 
 	var total int64
 	q.Count(&total)