refactor: remove api-types.ts compatibility layer

- Migrated all 29 files from api-types.ts to use reflector-api.d.ts directly
- Removed $SourceKind manual enum in favor of OpenAPI-generated types
- Fixed unrelated Spinner component TypeScript error in AuthWrapper.tsx
- All imports now use: import type { components } from "path/to/reflector-api"
- Deleted api-types.ts file completely

www/app/(app)/transcripts/useWebRTC.ts

@@ -2,7 +2,8 @@ import { useEffect, useState } from "react";
 import Peer from "simple-peer";
 import { useError } from "../../(errors)/errorContext";
 import { useTranscriptWebRTC } from "../../lib/api-hooks";
-import { RtcOffer } from "../../lib/api-types";
+import type { components } from "../../reflector-api";
+type RtcOffer = components["schemas"]["RtcOffer"];
 
 const useWebRTC = (
   stream: MediaStream | null,