处理mac打包后粘贴图片缩略图不可见的问题，处理历史history不可见问题

@@ -511,6 +511,22 @@ class HistoryManager:
 
         return timestamp
 
+    def _fix_history_path(self, stored_path: Path, timestamp: str) -> Path:
+        """修正历史记录中的路径，使其指向当前 base_path
+
+        存储迁移后，index 里的绝对路径可能指向旧位置（如 .app 内部），
+        而实际文件已在新的 base_path 下。用 timestamp + 文件名重建路径。
+        """
+        if stored_path.exists():
+            return stored_path
+
+        # 尝试在当前 base_path 下找到对应文件
+        corrected = self.base_path / timestamp / stored_path.name
+        if corrected.exists():
+            return corrected
+
+        return stored_path
+
     def load_history_index(self) -> List[HistoryItem]:
         """加载历史记录索引
 
@@ -525,6 +541,28 @@ class HistoryManager:
                 data = json.load(f)
 
             history_items = [HistoryItem.from_dict(item) for item in data]
+
+            # 修正可能过期的绝对路径（存储迁移后旧路径不再有效）
+            needs_save = False
+            for item in history_items:
+                fixed_gen = self._fix_history_path(item.generated_image_path, item.timestamp)
+                if fixed_gen != item.generated_image_path:
+                    item.generated_image_path = fixed_gen
+                    needs_save = True
+
+                fixed_refs = []
+                for ref_path in item.reference_image_paths:
+                    fixed_ref = self._fix_history_path(ref_path, item.timestamp)
+                    if fixed_ref != ref_path:
+                        needs_save = True
+                    fixed_refs.append(fixed_ref)
+                item.reference_image_paths = fixed_refs
+
+            # 路径修正后持久化，避免每次都修正
+            if needs_save:
+                self.logger.info("检测到历史记录路径变更，已自动修正")
+                self._save_history_index(history_items)
+
             # 按时间戳倒序排列
             history_items.sort(key=lambda x: x.timestamp, reverse=True)
             return history_items
@@ -2093,11 +2131,13 @@ class ImageGeneratorWindow(QMainWindow):
         """Update image preview thumbnails"""
         self.logger.info(f"更新图片预览，共 {len(self.uploaded_images)} 张图片")
         try:
-            # Clear existing previews
+            # Clear existing previews - 立即删除而非 deleteLater，避免布局刷新时序问题
             while self.img_layout.count() > 1:  # Keep the stretch
                 item = self.img_layout.takeAt(0)
-                if item.widget():
-                    item.widget().deleteLater()
+                widget = item.widget()
+                if widget:
+                    widget.setParent(None)
+                    widget.deleteLater()
 
             # Add thumbnails
             for idx, file_path in enumerate(self.uploaded_images):
@@ -2157,6 +2197,10 @@ class ImageGeneratorWindow(QMainWindow):
                 except Exception as e:
                     self.logger.error(f"创建缩略图失败: {file_path}, 错误: {str(e)}", exc_info=True)
 
+            # 强制刷新布局和滚动区域（macOS 打包环境下可能需要）
+            self.img_container.adjustSize()
+            self.img_scroll.update()
+
         except Exception as e:
             self.logger.error(f"更新图片预览失败: {str(e)}", exc_info=True)