API功能性修复

internal/handler/plugin_api.go

@@ -207,6 +207,16 @@ func AdminSystemStatus(c *gin.Context) {
 	})
 }
 
-
-
-
+// AdminSystemQueueStats returns empty queue stats (Go app has no Horizon/queue workers).
+// The React frontend polls this endpoint; returning empty data prevents 404 polling errors.
+func AdminSystemQueueStats(c *gin.Context) {
+	Success(c, gin.H{
+		"workload":     []any{},
+		"masters":      []any{},
+		"failed_jobs":  0,
+		"total_jobs":   0,
+		"pending_jobs": 0,
+		"processed":    0,
+		"failed":       0,
+	})
+}