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/i18n/messages/en-US.ts

@@ -811,6 +811,23 @@ const enUS = {
       keywords: "Keywords",
       competitors: "Competitors",
     },
+    quota: {
+      plan: "Current plan",
+      planHint: "Brand library limits are enforced from the active plan.",
+      brands: "Brand companies",
+      brandsHint: "Free defaults to 1 and paid defaults to 2.",
+      keywords: "Total keywords",
+      keywordsHint: "The total number of keywords this account can bind.",
+      questions: "Questions per keyword",
+      questionsHint: "The maximum number of questions allowed under one keyword.",
+    },
+    meta: {
+      keywordCount: "{count} keywords",
+      questionCount: "{count} questions",
+      brandKeywordCount: "{count} keywords under this brand",
+      globalKeywordUsage: "Total keywords used {used} / {total}",
+      keywordQuestionUsage: "Questions {used} / {total}",
+    },
     sections: {
       keywords: "Keywords",
       questions: "Question set",
@@ -855,6 +872,9 @@ const enUS = {
       deleteCompetitor: "Competitor deleted.",
       chooseBrand: "Please choose a brand first.",
       chooseKeyword: "Please choose a keyword first.",
+      brandLimitReached: "Your current plan allows up to {limit} brand companies.",
+      keywordLimitReached: "This account allows up to {limit} keywords.",
+      questionLimitReached: "This keyword allows up to {limit} questions.",
     },
   },
   custom: {