fix: keep editor playback active on playhead changes

main.py

@@ -4508,6 +4508,9 @@ class AudioEditorDialog(QDialog):
         if not checked:
             self._stop_play()
             return
+        self._play_from_playhead()
+
+    def _play_from_playhead(self) -> None:
         play_t = self._playhead_secs()
         se = self._selection_secs()
         if se is not None and se[0] <= play_t <= se[1]:
@@ -4539,7 +4542,7 @@ class AudioEditorDialog(QDialog):
                       end: float | None = None,
                       loop: bool = False) -> None:
         from PyQt6.QtCore import QProcess
-        self._stop_play()
+        self._stop_play(reset_button=False)
         self._play_proc = QProcess(self)
         self._play_proc.finished.connect(self._on_play_finished)
         self._play_proc.errorOccurred.connect(self._on_play_error)
@@ -4570,7 +4573,7 @@ class AudioEditorDialog(QDialog):
 
     def _on_wave_playhead_changed(self, t: float) -> None:
         if self._play_proc is not None:
-            self._stop_play()
+            self._play_from_playhead()
 
     def _playhead_secs(self) -> float:
         t = self._wave.playhead()
@@ -4623,7 +4626,7 @@ class AudioEditorDialog(QDialog):
             self._btn_play.setChecked(False)
             self._btn_play.blockSignals(False)
 
-    def _stop_play(self) -> None:
+    def _stop_play(self, reset_button: bool = True) -> None:
         proc = self._play_proc
         self._play_proc = None
         self._playhead_timer.stop()
@@ -4636,8 +4639,9 @@ class AudioEditorDialog(QDialog):
             proc.kill()
             proc.waitForFinished(100)
             proc.deleteLater()
-        self._btn_play.setText("▶ Play")
-        if self._btn_play.isChecked():
+        if reset_button:
+            self._btn_play.setText("▶ Play")
+        if reset_button and self._btn_play.isChecked():
             self._btn_play.blockSignals(True)
             self._btn_play.setChecked(False)
             self._btn_play.blockSignals(False)