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)/transcripts/useWebSockets.ts

@@ -2,7 +2,7 @@ import { useContext, useEffect, useState } from "react";
 import { Topic, FinalSummary, Status } from "./webSocketTypes";
 import { useError } from "../../(errors)/errorContext";
 import { DomainContext } from "../../domainContext";
-import { AudioWaveform, GetTranscriptSegmentTopic } from "../../api";
+import { AudioWaveform, GetTranscriptSegmentTopic } from "../../lib/api-types";
 import useApi from "../../lib/useApi";
 
 export type UseWebSockets = {