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chore: update frontend direct dependencies to current safe versions

feat: add Stronghold frontend dependency for password vault UI

fix: package.json - add @tauri-apps/cli, @tailwindcss/vite, fix scripts for deno compatibility

refactor: package.json - update deps for board-first architecture (lucide-react, motion, tauri-apps)

fix: use React 19 compatible react-konva version

feat: add react-konva, konva, use-image dependencies for real PureRef canvas

Switch frontend to React+Tailwind+Motion: new package.json for prototype UI"

Production Phase 2-3: Stronghold vault, SQLite FTS5 migration, sessions, downloads, credentials, adblock rules, warnings fixed

Revise UI and implement Phase 1 browser tabs

Phase 0 MUSE alpha skeleton and SRS docs