采集卡bug修复

preview.py

@@ -161,17 +161,17 @@ class PreviewWindow:
     
     def create_grid_window(self):
         """创建网格窗口"""
-        root = tk.Tk()
-        root.title("采集卡预览 - 点击放大")
-        root.geometry("1000x700")
-        
         # 获取显示配置
         display = self.config.get('display', {})
-        preview_width = display.get('preview_width', 640)
-        preview_height = display.get('preview_height', 360)
+        preview_width = display.get('preview_width', 1000)
+        preview_height = display.get('preview_height', 700)
         columns = display.get('preview_columns', 2)
         rows = display.get('preview_rows', 2)
         
+        root = tk.Tk()
+        root.title("采集卡预览 - 点击放大")
+        root.geometry(f"{preview_width}x{preview_height}")
+        
         canvas = Canvas(root, bg='black')
         canvas.pack(fill=tk.BOTH, expand=True)