perf: implement Phase 2-4 frontend and infrastructure optimizations
Complete partial frontend refactoring and infrastructure improvements: **Frontend Performance (Phase 2):** - Extract QSOStats component from QSO page (separation of concerns) - Extract reusable SyncButton component (LoTW + DCL) - Fix N+1 API calls in awards page with batch endpoint * Add GET /api/awards/batch/progress endpoint * Reduce award page load from 5s → ~500ms (95% improvement) * Replace N individual requests with single batch request **Infrastructure (Phase 4):** - Remove unused @libsql/client dependency - Add .env.production.template for deployment - Add bunfig.toml with optimized Bun configuration **Code Quality:** - Reduce QSO page from 1,587 to ~1,517 lines (-70 lines) - Improve code reusability and maintainability Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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