diff --git a/src/CncCollector/Core/CollectorEngine.cs b/src/CncCollector/Core/CollectorEngine.cs
index 3cfb5cb..282be33 100644
--- a/src/CncCollector/Core/CollectorEngine.cs
+++ b/src/CncCollector/Core/CollectorEngine.cs
@@ -65,6 +65,9 @@ namespace CncCollector.Core
             _startTime = DateTime.Now;
             _isRunning = true;
 
+            // 0. 立即写入running心跳（避免启动后仪表盘读不到running状态）
+            WriteHeartbeat("running");
+
             // 1. 加载并启动采集地址
             LoadAndStartWorkers();
 
diff --git a/src/CncWebApi/Controllers/DashboardController.cs b/src/CncWebApi/Controllers/DashboardController.cs
index ad784f1..6e867f5 100644
--- a/src/CncWebApi/Controllers/DashboardController.cs
+++ b/src/CncWebApi/Controllers/DashboardController.cs
@@ -173,7 +173,8 @@ namespace CncWebApi.Controllers
             }
             catch (Exception ex)
             {
-                return Ok(ApiResponse<object>.Success(new { forwarded = false, error = ex.Message }));
+                // 采集服务不可达时返回失败，避免前端误认为操作成功
+                return Ok(ApiResponse<object>.Fail(50001, $"采集服务连接失败: {ex.Message}"));
             }
         }
     }