fix: guard mask generation against WebP sequence export path
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@@ -1039,6 +1039,9 @@ class MainWindow(QMainWindow):
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if not self._last_export_path:
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if not self._last_export_path:
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self.statusBar().showMessage("No clip exported yet — export first.")
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self.statusBar().showMessage("No clip exported yet — export first.")
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return
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return
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if os.path.isdir(self._last_export_path):
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self.statusBar().showMessage("Mask generation requires an MP4 export — switch format to MP4 and export first.")
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return
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if self._mask_worker and self._mask_worker.isRunning():
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if self._mask_worker and self._mask_worker.isRunning():
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self.statusBar().showMessage("Mask generation already running…")
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self.statusBar().showMessage("Mask generation already running…")
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return
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return
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