feat(ai): mark cover reset history in generate table

app/gui/models.py

@@ -217,9 +217,14 @@ class GenerateTaskTableModel(QAbstractTableModel):
         task = self.tasks[index.row()]
         if role in (Qt.DisplayRole, Qt.EditRole):
             return self._display_value(task, index.column())
+        if role == Qt.ForegroundRole and index.column() == 1:
+            if self._cover_reset_count(task) > 0:
+                return _qcolor(COLOR_WARNING)
         if role == Qt.ForegroundRole and index.column() in {4, 5}:
             return self._component_status_color(self._display_value(task, index.column()))
         if role == Qt.ToolTipRole:
+            if index.column() == 1 and self._cover_reset_count(task) > 0:
+                return self._cover_reset_tooltip(task)
             if index.column() == 3 and self._can_edit_title(task):
                 return "双击可微调新标题，只修改本地待更新内容"
             if task.last_error:
@@ -300,6 +305,16 @@ class GenerateTaskTableModel(QAbstractTableModel):
         except (TypeError, ValueError):
             return 0
 
+    def _cover_reset_count(self, task):
+        try:
+            return int(getattr(task, "cover_reset_count", 0) or 0)
+        except (TypeError, ValueError):
+            return 0
+
+    def _cover_reset_tooltip(self, task):
+        count = self._cover_reset_count(task)
+        return f"该商品封面已重置 {count} 次，可能有多张候选图，双击可查看封面画廊"
+
     def _has_new_title(self, task):
         return bool(str(getattr(task, "new_title", "") or "").strip())