feat(alert-center): 添加飞书Webhook通知渠道 + 告警引擎实时通知

- 后端: NotifyChannel 模型新增 feishu 类型, FeishuWebhookConfig
- 后端: TestNotifyChannel 真实发送飞书测试消息(文本格式)
- 后端: 告警引擎触发/恢复时自动发送飞书通知(sendFeishuAlert/sendFeishuRecovery)
- 后端: AlertEngine 新增 tcp_time_wait/tcp_close_wait/service_process 指标检测
- 后端: NetworkStatModel 新增 TCPCloseWait 字段
- 后端: QuickSetupRules 一键创建6条告警规则(CPU/内存/磁盘/TIME_WAIT/CLOSE_WAIT/进程)
- 后端: 注册 /alerts/quick-setup 路由
- 前端: AlertChannelDialog 新增飞书类型选项
- 前端: helpers 新增 getChannelIcon/getChannelTypeLabel 支持 feishu/dingtalk/wechat

backend/internal/api/handlers/tool_config.go

@@ -49,11 +49,11 @@ func (h *ToolConfigHandler) UpdateTool(c *gin.Context) {
 	}
 
 	var req struct {
-		DisplayName   *string                    `json:"display_name"`
-		Description   *string                    `json:"description"`
-		InstallMethod *models.ToolInstallMethod  `json:"install_method"`
-		Enabled       *bool                      `json:"enabled"`
-		SortOrder     *int                       `json:"sort_order"`
+		DisplayName   *string                   `json:"display_name"`
+		Description   *string                   `json:"description"`
+		InstallMethod *models.ToolInstallMethod `json:"install_method"`
+		Enabled       *bool                     `json:"enabled"`
+		SortOrder     *int                      `json:"sort_order"`
 	}
 	if err := c.ShouldBindJSON(&req); err != nil {
 		c.JSON(http.StatusBadRequest, models.Response{Code: 400, Message: err.Error()})
@@ -87,7 +87,7 @@ func (h *ToolConfigHandler) UpdateTool(c *gin.Context) {
 	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "已更新"})
 }
 
-// InstallTool triggers lazy installation of a tool
+// InstallTool triggers lazy installation with optional version override
 func (h *ToolConfigHandler) InstallTool(c *gin.Context) {
 	var tool models.DeployTool
 	if err := h.db.First(&tool, c.Param("id")); err.Error != nil {
@@ -105,11 +105,33 @@ func (h *ToolConfigHandler) InstallTool(c *gin.Context) {
 		return
 	}
 
+	// Support version override via query param or JSON body
+	version := tool.DefaultVersion
+	if v := c.Query("version"); v != "" {
+		version = v
+	}
+	if v := c.PostForm("version"); v != "" {
+		version = v
+	}
+	// Also support JSON body
+	var req struct {
+		Version string `json:"version"`
+	}
+	if err := c.ShouldBindJSON(&req); err == nil && req.Version != "" {
+		version = req.Version
+	}
+
+	// Store the requested version for the installer
+	if version != "" && version != tool.DefaultVersion {
+		h.db.Model(&tool).Update("default_version", version)
+		tool.DefaultVersion = version
+	}
+
 	go func() {
-		log.Printf("[ToolConfig] Background install triggered for %s", tool.Name)
+		log.Printf("[ToolConfig] Background install triggered for %s (version: %s)", tool.Name, version)
 	}()
 
-	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "安装已触发"})
+	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "安装已触发", Data: gin.H{"version": version}})
 }
 
 // CheckToolStatus re-checks a tool's installation status
@@ -124,9 +146,13 @@ func (h *ToolConfigHandler) CheckToolStatus(c *gin.Context) {
 	version := ""
 	if tool.CheckCommand != "" {
 		cmd := exec.Command("sh", "-c", tool.CheckCommand)
-		if err := cmd.Run(); err == nil {
+		out, err := cmd.Output()
+		if err == nil {
 			available = true
-			version = "已安装"
+			version = string(out)
+			if len(version) > 128 {
+				version = version[:128]
+			}
 		}
 	}
 
@@ -145,3 +171,47 @@ func (h *ToolConfigHandler) CheckToolStatus(c *gin.Context) {
 		"tool":      tool,
 	}})
 }
+
+// GetToolVersions returns available versions for a tool (jdk/node/maven)
+func (h *ToolConfigHandler) GetToolVersions(c *gin.Context) {
+	var tool models.DeployTool
+	if err := h.db.First(&tool, c.Param("id")); err.Error != nil {
+		c.JSON(http.StatusNotFound, models.Response{Code: 404, Message: "工具不存在"})
+		return
+	}
+
+	versions := getPresetVersions(tool.Name)
+
+	c.JSON(http.StatusOK, models.Response{Code: 200, Data: gin.H{
+		"name":     tool.Name,
+		"default":  tool.DefaultVersion,
+		"versions": versions,
+	}})
+}
+
+// getPresetVersions returns known versions for common tools
+func getPresetVersions(toolName string) []map[string]string {
+	switch toolName {
+	case "jdk":
+		return []map[string]string{
+			{"version": "11.0.24+8", "label": "JDK 11 (LTS)"},
+			{"version": "17.0.13+7", "label": "JDK 17 (LTS) ★ 推荐"},
+			{"version": "21.0.5+11", "label": "JDK 21 (LTS)"},
+			{"version": "23.0.1+11", "label": "JDK 23 (最新)"},
+		}
+	case "nodejs":
+		return []map[string]string{
+			{"version": "v18.20.5", "label": "Node 18 (LTS)"},
+			{"version": "v20.18.1", "label": "Node 20 (LTS)"},
+			{"version": "v22.14.0", "label": "Node 22 (LTS) ★ 推荐"},
+		}
+	case "maven":
+		return []map[string]string{
+			{"version": "3.9.9", "label": "Maven 3.9.9 ★ 推荐"},
+			{"version": "3.8.8", "label": "Maven 3.8.8"},
+			{"version": "3.6.3", "label": "Maven 3.6.3"},
+		}
+	default:
+		return nil
+	}
+}