fix: debounce on_resize to prevent audio stutter

src/tuimble/app.py

@@ -447,6 +447,8 @@ class TuimbleApp(App):
         self._device_monitor = DeviceMonitor(self._on_device_change)
         self._pending_reload: Config | None = None
         self._tree_refresh_timer = None
+        self._resize_timer = None
+        self._pending_width: int = 80
         self._reconnect = ReconnectManager(
             connect_fn=self._reconnect_connect,
             on_attempt=self._reconnect_on_attempt,
@@ -1049,9 +1051,20 @@ class TuimbleApp(App):
     # -- resize --------------------------------------------------------------
 
     def on_resize(self, event: events.Resize) -> None:
-        """Adapt layout to new terminal dimensions."""
+        """Adapt layout to new terminal dimensions (debounced)."""
+        self._pending_width = event.size.width
+        if self._resize_timer is not None:
+            self._resize_timer.stop()
+        self._resize_timer = self.set_timer(
+            TREE_DEBOUNCE, self._apply_resize
+        )
+
+    def _apply_resize(self) -> None:
+        """Apply deferred resize — keeps event loop free during drag."""
+        self._resize_timer = None
+        w = self._pending_width
         sidebar = self.query_one("#sidebar", ChannelTree)
-        sidebar.styles.width = max(16, min(32, event.size.width // 4))
+        sidebar.styles.width = max(16, min(32, w // 4))
         self.query_one("#status", StatusBar).refresh()
 
     # -- lifecycle -----------------------------------------------------------