feat: TUI 每秒定时器强制重绘 + 帧数统计写入日志

transfer.py

@@ -437,6 +437,7 @@ class TaskRunner:
         self.proc: subprocess.Popen | None = None
         self.stats = ProgressStats()
         self._stop = threading.Event()
+        self.stats_frames = 0
 
     # -- 命令构建
     def build_command(self) -> list[str]:
@@ -540,6 +541,7 @@ class TaskRunner:
         self.lm.write_error(line)
 
     def _emit_stats(self) -> None:
+        self.stats_frames += 1
         if self.on_stats:
             self.on_stats(self.stats)
 
@@ -578,7 +580,7 @@ class TaskRunner:
         if self._stop.is_set():
             self.proc.kill()
         rc = self.proc.wait()
-        self.lm.write(f"exit code: {rc}")
+        self.lm.write(f"exit code: {rc} (进度帧 {self.stats_frames} 次)")
         removed = self.lm.prune()
         if removed:
             self.lm.write(f"pruned old logs: {len(removed)}")
@@ -766,9 +768,16 @@ class TransferApp(App):
     def on_mount(self) -> None:
         self.query_one("#file-log", RichLog).write("[green]文件日志[/]")
         self.query_one("#error-log", RichLog).write("[red]错误日志[/]")
+        # 每秒定时器: 强制重绘 UI (不依赖帧回调)
+        self.set_interval(1.0, self._tick)
         if self.preset:
             self._start_task(self.preset)
 
+    def _tick(self) -> None:
+        """每秒重绘: 基于 runner 缓存的 stats 刷新进度/文字"""
+        if self.runner and self._task_running:
+            self._on_stats(self.runner.stats)
+
     # -- 输入处理
     def on_input_submitted(self, event: Input.Submitted) -> None:
         text = event.value.strip()