fix: sync editor playhead with selection changes

main.py

@@ -4365,6 +4365,7 @@ class AudioEditorDialog(QDialog):
         self._healed_seams: dict[str, list[float]] = {}
 
         self._wave = AudioWaveform()
+        self._wave.selection_changed.connect(self._on_wave_selection_changed)
         self._wave.playhead_changed.connect(self._on_wave_playhead_changed)
         self._btn_heal_cut = QPushButton("Heal Cut")
         self._btn_delete = QPushButton("Delete")
@@ -4616,6 +4617,13 @@ class AudioEditorDialog(QDialog):
             return
         self._play_current(*self._join_preview)
 
+    def _on_wave_selection_changed(self, s: float, e: float) -> None:
+        was_playing = self._play_proc is not None
+        prior_playhead = self._playhead_secs()
+        self._wave.set_playhead(s)
+        if was_playing and (self._play_loop or s <= prior_playhead <= e):
+            self._play_current(s, e, loop=True)
+
     def _on_wave_playhead_changed(self, t: float) -> None:
         if self._play_proc is not None:
             self._play_from_playhead()