fix(generate): limit gallery preview to left double-click

app/gui/tabs/generate.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from PySide6.QtCore import QEvent, QRectF, QSize
+from PySide6.QtCore import QEvent, QModelIndex, QRectF, QSize, Signal
 from PySide6.QtGui import QColor, QPainter
 
 from ... import product_status
@@ -16,6 +16,20 @@ def GenerateWorker(*args, **kwargs):
     return _call_package_attr("GenerateWorker", _RealGenerateWorker, *args, **kwargs)
 
 
+class _GenerateTaskTableView(QTableView):
+    """Task table that exposes only left-button double-clicks for previews."""
+
+    leftDoubleClicked = Signal(QModelIndex)
+
+    def mouseDoubleClickEvent(self, event):
+        super().mouseDoubleClickEvent(event)
+        if event.button() != Qt.LeftButton:
+            return
+        index = self.indexAt(event.position().toPoint())
+        if index.isValid():
+            self.leftDoubleClicked.emit(index)
+
+
 class _CoverThumbnailLabel(QLabel):
     def __init__(self, image_path, open_callback, parent=None):
         super().__init__(parent)
@@ -1158,7 +1172,7 @@ class GenerateTab(QWidget):
         ) = _build_empty_state_card("generateEmptyStateCard")
         if self.open_accounts_callback is not None:
             self.empty_state_button.clicked.connect(self.open_accounts_callback)
-        self.task_table = QTableView()
+        self.task_table = _GenerateTaskTableView()
         self.model = GenerateTaskTableModel(self.task_table, db_path=self.db_path, status_callback=self._set_status)
         self.model.set_generate_mode(self._current_generate_mode())
         self.task_table.setModel(self.model)
@@ -1249,7 +1263,7 @@ class GenerateTab(QWidget):
         self.generate_button.clicked.connect(self.start_generate)
         self.stop_generate_button.clicked.connect(self.stop_generate)
         self.reset_generate_button.clicked.connect(self.reset_generated_result)
-        self.task_table.doubleClicked.connect(self.show_task_images)
+        self.task_table.leftDoubleClicked.connect(self.show_task_images)
 
         self.refresh_title_templates()
         self.refresh_cover_templates()