fix: 🎨 Onboarding + Offline + Reset password pages neo-brutalism

fix: 🎨 Forgot password + usage pages neo-brutalism + dark mode

fix: 🎨 Register page neo-brutalism + dark mode

feat: 🎨 Neo-brutalism login page with bold typography and spring animations

feat: Salary insights page, resume editor with live preview, recommendations feed, password reset flow, job capture API

feat: Add initial DB migration, seed data, OAuth (Google+GitHub), email service, alerts page, interview prep page

feat: Complete project scaffold - backend (FastAPI) + frontend (Next.js 15) + scraper + LLM gateway