feat: TUI 速度曲线栏增加实时速度文字 (当前/峰值/平均)

transfer.py

@@ -55,6 +55,16 @@ def human_speed(bps: float) -> str:
     return f"{human_size(bps)}/s"
 
 
+def speed_stats(history) -> tuple[float, float, float]:
+    """速度统计: (当前, 峰值, 平均) 字节/秒"""
+    if not history:
+        return 0.0, 0.0, 0.0
+    cur = float(history[-1])
+    peak = max(history)
+    avg = sum(history) / len(history)
+    return cur, peak, avg
+
+
 # ---------------------------------------------------------------- 数据结构
 
 @dataclass
@@ -689,7 +699,8 @@ TUI_CSS = """
 Screen { layout: vertical; }
 #top { height: 7; border: round $primary; padding: 0 1; }
 #stats-line { height: 1; content-align: left middle; }
-#chart-box { height: 5; border: round $secondary; padding: 0 1; }
+#chart-box { height: 6; border: round $secondary; padding: 0 1; }
+#speed-stats { height: 1; color: $text-muted; }
 #logs { height: 1fr; }
 #file-log { width: 1fr; border: round $success; }
 #error-log { width: 1fr; border: round $error; }
@@ -734,8 +745,9 @@ class TransferApp(App):
             yield ProgressBar(total=100, show_eta=True, id="total-bar")
             yield ProgressBar(total=100, id="file-bar")
         with Vertical(id="chart-box"):
-            yield Static("速度曲线 (最近 80 秒)")
+            yield Static("速度曲线 (最近 80 秒)", id="speed-title")
             yield Sparkline([0], summary_function=max, id="speed-spark")
+            yield Static("", id="speed-stats")
         with Horizontal(id="logs"):
             yield RichLog(id="file-log", highlight=True, markup=True)
             yield RichLog(id="error-log", highlight=True, markup=True)
@@ -920,6 +932,10 @@ class TransferApp(App):
         if st.speed_bps:
             self.speed_history.append(st.speed_bps)
             self.query_one("#speed-spark", Sparkline).data = list(self.speed_history)
+            cur, peak, avg = speed_stats(self.speed_history)
+            self.query_one("#speed-stats", Static).update(
+                f"当前 {human_speed(cur)} | 峰值 {human_speed(peak)} | "
+                f"平均 {human_speed(avg)} ({len(self.speed_history)} 样本)")
         parts = [f"总进度 {st.pct:5.1f}%"]
         if st.bytes_total:
             parts.append(f"{human_size(st.bytes_done)}/{human_size(st.bytes_total)}")