fix(db): resolve SqliteError at startup by improving path detection and initialization robustness

Fix Multi-User Bug: Moved student profiles from shared SQLite to private Browser Cookies so users don't overwrite each other

UI: Add scraping in-progress state and 2-save profile limit

Fix SQLITE_CANTOPEN: Lazy-load DB connection in lib/db.ts to bypass Vite build-time execution

Fix SQLITE_CANTOPEN: disable prerendering to prevent DB access during vite build

Fix HF Spaces build: set DATABASE_PATH before Vite build and clear Svelte warnings

Fix SQLITE_CANTOPEN by reordering Docker build and fix Svelte 5 warnings

Initialize OpportunityRadar V3 Platform