feat: Agent采集uptime, 后端持久化kernel/uptime/diskIO, 前端磁盘BPS+IOPS展示

- Agent: system.go 添加 readUptime(), SystemStat 携带 Uptime
- Backend: Server 模型新增 Kernel 字段, ReceiveReport 持久化 kernel+uptime
- Backend: /agent/latest 返回 kernel/uptime/port_info/disk_io_info/disk_total
- Frontend: 磁盘监控改为 BPS+IOPS (4张卡片), 系统信息修复内核/运行时长/监听端口/磁盘容量
- 图表单位从 MB/s 改为 KB/s, 添加 formatBPS 工具函数

backend/internal/api/routes/routes.go

@@ -135,7 +135,7 @@ func Register(r *gin.Engine, db *gorm.DB, log *zap.Logger, cfg *config.Config, c
 	}
 
 	// 服务器路由
-	serverHandler := handlers.NewServerHandler(db)
+	serverHandler := handlers.NewServerHandler(db, cfg.JWT.Secret)
 	servers := authorized.Group("/servers")
 	{
 		servers.GET("", serverHandler.ListServers)
@@ -434,7 +434,7 @@ func Register(r *gin.Engine, db *gorm.DB, log *zap.Logger, cfg *config.Config, c
 	{
 		agentQuery.GET("/latest", agentHandler.GetLatestReports)
 		agentQuery.GET("/history/:hostname", agentHandler.GetHostHistory)
-		agentQuery.GET("/kline", agentHandler.GetKline)
+		agentQuery.GET("/aggregate", agentHandler.GetAggregate)
 
 		// 远程任务
 		agentQuery.POST("/tasks", taskHandler.CreateTask)
@@ -451,6 +451,10 @@ func Register(r *gin.Engine, db *gorm.DB, log *zap.Logger, cfg *config.Config, c
 		// 告警事件
 		agentQuery.GET("/alerts", taskHandler.ListAlerts)
 		agentQuery.POST("/alerts/:id/resolve", taskHandler.ResolveAlert)
+
+		// Agent 安装/卸载
+		agentQuery.POST("/uninstall", agentInstallHandler.UninstallAgent)
+		agentQuery.POST("/batch-uninstall", agentInstallHandler.BatchUninstallAgent)
 	}
 
 	// AI 智能助手 - LLM 配置 + 对话代理（OpenAI 兼容） // Logan.Li
@@ -535,6 +539,18 @@ func Register(r *gin.Engine, db *gorm.DB, log *zap.Logger, cfg *config.Config, c
 		zabbixDSGroup.POST("/test", zabbixDSHandler.TestConnection)
 	}
 
+	// 凭据管理 — SSH密钥/API Token/密码统一加密管理 // Logan.Li
+	credentialHandler := handlers.NewCredentialHandler(db, cfg.JWT.Secret)
+	credGroup := authorized.Group("/credentials")
+	{
+		credGroup.GET("", credentialHandler.ListCredentials)
+		credGroup.POST("", credentialHandler.CreateCredential)
+		credGroup.PUT("/:id", credentialHandler.UpdateCredential)
+		credGroup.DELETE("/:id", credentialHandler.DeleteCredential)
+	}
+	// 服务器凭据关联 // Logan.Li
+	authorized.POST("/servers/:id/assign-credential", credentialHandler.AssignCredential)
+
 	// 站点拨测 — HTTP/TCP/DNS/PING 主动监控 // Logan.Li
 	siteHandler := handlers.NewSiteHandler(db)
 	siteGroup := authorized.Group("/site")