fix: 进度条(Bar)宽度弹性占满剩余空间, 随屏幕自适应

transfer.py

@@ -699,6 +699,7 @@ TUI_CSS = """
 Screen { layout: vertical; }
 #top { height: 7; border: round $primary; padding: 0 1; }
 #total-bar, #file-bar { width: 100%; }
+#total-bar Bar, #file-bar Bar { width: 1fr; }
 #stats-line { height: 1; content-align: left middle; }
 #chart-box { height: 6; border: round $secondary; padding: 0 1; }
 #speed-stats { height: 1; color: $text-muted; }