Remove unused functions and imports from route tests, fix array index key
warnings in skeleton components, apply biome formatting.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Create src/server/routes/discovery.ts with GET /setups, /items, /categories handlers
- Register discoveryRoutes in src/server/index.ts with browseTier rate limiting
- Add auth skip for /api/discovery/* GET requests in auth middleware
- Create tests/routes/discovery.test.ts with 10 tests covering all endpoints and pagination
