feat: 监控告警体系统一重构 + 自动化任务调度引擎 + 监控大屏拆分

告警中心
- 新增统一告警(alert_unified)、监控告警规则(monitor_alert_rule)、指标目录(alert_metric_catalog)
- 通知策略与消息分发(alert_notify_policy/dispatch/message)、静默规则
- 告警引擎按阈值/SNMP 拆分(alert_engine_monitor/snmp)

监控采集
- SNMP 常量/模板与历史指标(snmp templates/constants、snmp_metrics_history、snmp_collect)
- 中间件监控 Redis 采集与种子(middleware_monitor_redis/seed)
- 站点探测 pkg(siteprobe) + 站点视图(site_view)

自动化任务
- cron 调度器(cronscheduler)、脚本运行器(scriptrunner)、系统任务(systask)及运行记录(cron_job_run、system_task)

审计与凭证
- 审计设置(audit_setting) + 历史清理(auditcleaner)

前端
- 监控页面(host/middleware/site/snmp)拆分为子模块并大屏化
- 告警中心多 Tab(规则/指标目录/通知策略/静默)、任务管理组件重构、Agent CLI Markdown 渲染
- 移除旧脚本卡片/详情/日志组件，统一为 ScriptTable/ScriptCodeEditor/TerminalOutput

Co-Authored-By: Claude <noreply@anthropic.com>

backend/controller/alert_channels.go

@@ -16,6 +16,7 @@ import (
 	"ezops/model"
 
 	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
 )
 
 // 通知渠道 CRUD（AlertHandler 方法接收者，与 alert.go 同包共享） // Logan.Li
@@ -198,7 +199,7 @@ func (h *AlertHandler) TestNotifyChannel(c *gin.Context) {
 
 	switch channel.Type {
 	case "feishu":
-		err := sendFeishuTest(channel.Config)
+		err := sendFeishuTest(h.db, channel.Config)
 		if err != nil {
 			status = "error"
 			message = "飞书通知发送失败: " + err.Error()
@@ -226,8 +227,8 @@ func (h *AlertHandler) TestNotifyChannel(c *gin.Context) {
 
 // ==================== 飞书 Webhook 发送逻辑 ====================
 
-// sendFeishuTest 发送飞书测试通知
-func sendFeishuTest(configJSON string) error {
+// sendFeishuTest 发送飞书测试通知 // Logan.Li
+func sendFeishuTest(db *gorm.DB, configJSON string) error {
 	var cfg model.FeishuWebhookConfig
 	if err := json.Unmarshal([]byte(configJSON), &cfg); err != nil {
 		return fmt.Errorf("解析配置失败: %w", err)
@@ -239,11 +240,11 @@ func sendFeishuTest(configJSON string) error {
 	title := "✅ AIOps 告警测试通知"
 	content := fmt.Sprintf("**测试时间**：%s\\n**来源**：AIOps 智能运维平台\\n**状态**：连通性测试成功 🎉", time.Now().Format("2006-01-02 15:04:05"))
 
-	return sendFeishuCard(cfg.URL, cfg.Secret, title, content, "green")
+	return sendFeishuCard(cfg.URL, cfg.Secret, title, content, "green", buildNotifyFooter(db))
 }
 
-// sendFeishuAlert 发送飞书告警通知
-func sendFeishuAlert(configJSON, title, content, severity string) error {
+// sendFeishuAlert 发送飞书告警通知 // Logan.Li
+func sendFeishuAlert(db *gorm.DB, configJSON, title, content, severity string) error {
 	var cfg model.FeishuWebhookConfig
 	if err := json.Unmarshal([]byte(configJSON), &cfg); err != nil {
 		return fmt.Errorf("解析配置失败: %w", err)
@@ -267,11 +268,15 @@ func sendFeishuAlert(configJSON, title, content, severity string) error {
 	}
 
 	title = emoji + " " + title
-	return sendFeishuCard(cfg.URL, cfg.Secret, title, content, color)
+	footer := defaultNotifyFooterTemplate
+	if db != nil {
+		footer = buildNotifyFooter(db)
+	}
+	return sendFeishuCard(cfg.URL, cfg.Secret, title, content, color, footer)
 }
 
-// sendFeishuRecovery 发送飞书恢复通知
-func sendFeishuRecovery(configJSON, title, content string) error {
+// sendFeishuRecovery 发送飞书恢复通知 // Logan.Li
+func sendFeishuRecovery(db *gorm.DB, configJSON, title, content string) error {
 	var cfg model.FeishuWebhookConfig
 	if err := json.Unmarshal([]byte(configJSON), &cfg); err != nil {
 		return fmt.Errorf("解析配置失败: %w", err)
@@ -281,11 +286,15 @@ func sendFeishuRecovery(configJSON, title, content string) error {
 	}
 
 	title = "✅ " + title
-	return sendFeishuCard(cfg.URL, cfg.Secret, title, content, "green")
+	footer := buildNotifyFooter(db)
+	return sendFeishuCard(cfg.URL, cfg.Secret, title, content, "green", footer)
 }
 
-// sendFeishuCard 发送飞书交互卡片消息
-func sendFeishuCard(webhookURL, secret, title, content, color string) error {
+// sendFeishuCard 发送飞书交互卡片消息 // Logan.Li
+func sendFeishuCard(webhookURL, secret, title, content, color, footer string) error {
+	if footer == "" {
+		footer = fmt.Sprintf("%s ｜ %s", time.Now().Format("2006-01-02 15:04:05"), defaultNotifyPlatformName)
+	}
 	// 解析 content 中的字段（格式: 多行 key: value）
 	lines := splitLines(content)
 	var fields []map[string]interface{}
@@ -339,7 +348,7 @@ func sendFeishuCard(webhookURL, secret, title, content, color string) error {
 					"elements": []map[string]interface{}{
 						{
 							"tag":     "plain_text",
-							"content": fmt.Sprintf("⏰ %s ｜ AIOps 智能运维平台", time.Now().Format("2006-01-02 15:04:05")),
+							"content": footer,
 						},
 					},
 				},
@@ -438,9 +447,9 @@ func (h *AlertHandler) NotifyAlert(ruleName, hostname, metric, severity, message
 	for _, ch := range channels {
 		switch ch.Type {
 		case "feishu":
-			title := buildAlertTitle(ruleName, hostname, metric, severity)
+			title := buildNotifyTitle(h.db, ruleName, hostname, metric, severity)
 			content := buildAlertContent(ruleName, hostname, metric, severity, message, value, threshold)
-			if err := sendFeishuAlert(ch.Config, title, content, severity); err != nil {
+			if err := sendFeishuAlert(h.db, ch.Config, title, content, severity); err != nil {
 				fmt.Printf("[AlertNotify] 飞书通知失败 (渠道:%s): %v\n", ch.Name, err)
 			}
 		}
@@ -458,26 +467,11 @@ func (h *AlertHandler) NotifyRecovery(ruleName, hostname, metric, message string
 			title := fmt.Sprintf("%s — 已恢复正常", ruleName)
 			content := fmt.Sprintf("**告警已恢复**\\n\\n主机：%s\\n指标：%s\\n详情：%s\\n恢复时间：%s",
 				hostname, metric, message, time.Now().Format("2006-01-02 15:04:05"))
-			if err := sendFeishuRecovery(ch.Config, title, content); err != nil {
+			if err := sendFeishuRecovery(h.db, ch.Config, title, content); err != nil {
 				fmt.Printf("[AlertNotify] 飞书恢复通知失败 (渠道:%s): %v\n", ch.Name, err)
 			}
 		}
 	}
 }
 
-func buildAlertTitle(ruleName, hostname, metric, severity string) string {
-	sevLabel := "严重告警"
-	if severity == "warning" {
-		sevLabel = "警告"
-	} else if severity == "info" {
-		sevLabel = "信息"
-	}
-	return fmt.Sprintf("[%s] %s — %s (%s)", sevLabel, ruleName, hostname, metric)
-}
 
-func buildAlertContent(ruleName, hostname, metric, severity, message string, value, threshold float64) string {
-	return fmt.Sprintf(
-		"**规则名称：** %s\\n**目标主机：** %s\\n**指标类型：** %s\\n**告警级别：** %s\\n**当前值：** %.2f\\n**阈值：** %.2f\\n**详细信息：** %s\\n**触发时间：** %s",
-		ruleName, hostname, metric, severity, value, threshold, message, time.Now().Format("2006-01-02 15:04:05"),
-	)
-}