fix: 🎨 Keyboard shortcuts command palette with neo-brutalism + dark mode

fix: 🎨 Theme toggle button using CSS vars properly for dark mode"

feat: Cover letters CRUD, application detail+timeline page, DOCX export, PWA manifest+service worker, dedup admin, onboarding banner

feat: Saved jobs with folders, job comparison tool, Cmd+K command palette, resume tailoring agent, dashboard home, alert worker

feat: Companies listing, bookmark folders, webhooks (Slack/Discord), mobile-responsive layout, theme toggle, API usage tracking

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