fix: resolve import errors and add missing api hooks

- Create constants.ts for RECORD_A_MEETING_URL
- Add api-types.ts for backward compatible type exports
- Update all imports from deleted api folder to new locations
- Add missing React Query hooks for rooms and zulip operations
- Create useApi compatibility layer for unmigrated components

www/app/(app)/browse/_components/TranscriptCards.tsx

@@ -18,7 +18,7 @@ import {
   highlightMatches,
   generateTextFragment,
 } from "../../../lib/textHighlight";
-import { SearchResult } from "../../../api";
+import { SearchResult } from "../../../lib/api-types";
 
 interface TranscriptCardsProps {
   results: SearchResult[];