😊优化代码结构，统一图片主题，优化总体质感，非常完美

nonebot_plugin_acgnshow/config.py

@@ -10,9 +10,10 @@ BGIMAGE_PATH = RES_PATH / "bgimage"
 
 class ConfigModel(BaseModel):
     acgnshow_pagesize: int = 10
-    acgnshow_bgimage_path: str = BGIMAGE_PATH
+    acgnshow_bgimage_path: str = BGIMAGE_PATH.resolve().as_posix()
     acgnshow_send_show_details_html: bool = False
     acgnshow_show_details_html_scale: float = 0.6
     acgnshow_show_details_html_img_count: int = 2
 
+
 config: ConfigModel = get_plugin_config(ConfigModel)