fix: 调整进度条的步幅

server/src/Services/ProgressTracker.cs

@@ -50,7 +50,7 @@ public readonly struct TaskProgress
                 TaskState.Cancelled => ProgressStatus.Canceled,
                 _ => ProgressStatus.Failed
             },
-            ProgressPercent = Total > 0 ? (Current * 100) / Total : 0,
+            ProgressPercent = Total > 0 ? ((double)Current * 100) / (double)Total : 0,
             ErrorMessage = Error ?? string.Empty
         };
     }