feat: add brand library management features

- Introduced BrandLibrarySummary type to encapsulate brand library limits and usage.
- Updated Brand interface to include keyword_count and question_count fields.
- Implemented brand library limits in the backend, including max brands, keywords, and questions per keyword.
- Added API endpoint to retrieve brand library summary.
- Enhanced BrandsView.vue to display brand library usage and limits.
- Implemented computed properties to manage brand, keyword, and question limits in the UI.
- Updated mutation handlers to invalidate relevant queries upon creating/updating brands, keywords, and questions.
- Added visual indicators for brand, keyword, and question limits in the UI.
- Enhanced error handling for exceeding brand and keyword limits during creation.

apps/admin-web/src/lib/errors.ts

@@ -39,6 +39,13 @@ const errorMessageMap: Record<string, string> = {
   object_storage_unavailable: "对象存储未配置或当前不可用",
   invalid_payload: "请求参数不合法",
   update_failed: "保存文章失败",
+  brand_exists: "品牌名称已存在",
+  brand_limit_reached: "品牌公司数量已达当前套餐上限",
+  keyword_exists: "关键词已存在",
+  keyword_limit_reached: "关键词数量已达当前套餐上限",
+  question_limit_reached: "当前关键词下的问题数量已达上限",
+  brand_not_found: "品牌不存在或已删除",
+  keyword_not_found: "关键词不存在或已删除",
   publish_cover_required: "已选择百家号，请先上传封面图",
   publisher_plugin_timeout: "浏览器插件响应超时，请刷新当前页面后重试",
   publisher_plugin_empty_response: "浏览器插件未返回数据，请刷新当前页面后重试",