- Create centralized src/config/apiConfig.ts for API_BASE, TLSYNC_URL,
WHISPERLIVE_URL, and SEARCH_URL resolution
- Fix multiplayerUser.tsx to use VITE_TLSYNC_URL instead of deriving
from VITE_FRONTEND_SITE_URL (was pointing to prod TLSync)
- Replace all 127.0.0.1:8080 fallbacks with /api (relative path)
- Replace all localhost:8000 fallbacks with VITE_API_BASE || /api
- Remove hardcoded https://api.classroomcopilot.ai production fallbacks
from transcription store and panel
- Fix axiosConfig.ts to use centralized API config
- Update .env.dev: set VITE_TLSYNC_URL to dev frontend URL
- Update .env.development: fix VITE_SEARCH_URL from localhost to prod
- Add missing env var type declarations to vite-env.d.ts
Fixes: t_73d78fb1
