snapshot: 数据源管理+大屏增强前快照

backend/internal/api/handlers/agent.go

@@ -87,13 +87,15 @@ func (h *AgentHandler) ReceiveReport(c *gin.Context) {
 	result := h.db.Model(&models.Server{}).
 		Where("hostname = ? OR ip = ?", req.Hostname, req.Hostname).
 		Updates(map[string]interface{}{
-			"cpu_usage":    req.CPU.UsagePercent,
-			"memory_usage": req.Memory.UsagePercent,
-			"disk_usage":   diskAvg,
-			"cpu":          req.CPU.CoreCount,
-			"memory":       memMB,
-			"disk":         int64(totalDiskGB),
-			"status":       "running",
+			"cpu_usage":     req.CPU.UsagePercent,
+			"memory_usage":  req.Memory.UsagePercent,
+			"disk_usage":    diskAvg,
+			"cpu":           req.CPU.CoreCount,
+			"memory":        memMB,
+			"disk":          int64(totalDiskGB),
+			"status":        "running",
+			"agent_status":  "online",
+			"agent_version": req.AgentVersion,
 		})
 
 	// WebSocket 广播：向所有前端客户端推送该主机的最新指标 // Logan.Li
@@ -155,20 +157,41 @@ func (h *AgentHandler) writeHotMetric(c *gin.Context, key string, value float64,
 // GetLatestReports 获取各主机最新上报
 // GET /api/v1/agent/latest
 func (h *AgentHandler) GetLatestReports(c *gin.Context) {
-	// 子查询：每个 hostname 最新的一条记录
-	var reports []models.AgentReport
+	var results []models.AgentLatestResponse
 	h.db.Raw(`
-		SELECT * FROM agent_reports 
-		WHERE id IN (
+		SELECT
+			a.hostname,
+			COALESCE(s.ip, '') as ip,
+			a.cpu_usage,
+			a.cpu_cores,
+			a.mem_usage,
+			a.mem_total,
+			a.mem_used,
+			COALESCE(s.disk_usage, 0) as disk_usage,
+			a.disk_info,
+			a.net_info,
+			a.report_time,
+			COALESCE(s.agent_version, '') as agent_version,
+			COALESCE(s.agent_status, 'offline') as agent_status,
+			COALESCE(s.os, '') as os,
+			COALESCE(r.name, '') as region
+		FROM agent_reports a
+		LEFT JOIN servers s ON s.hostname = a.hostname
+		LEFT JOIN regions r ON r.id = s.region_id
+		WHERE a.id IN (
 			SELECT MAX(id) FROM agent_reports GROUP BY hostname
 		)
-		ORDER BY report_time DESC
-	`).Scan(&reports)
+		ORDER BY a.report_time DESC
+	`).Scan(&results)
+
+	if results == nil {
+		results = []models.AgentLatestResponse{}
+	}
 
 	c.JSON(http.StatusOK, models.Response{
 		Code:    200,
 		Message: "success",
-		Data:    reports,
+		Data:    results,
 	})
 }