fix(app): 503 on storage failures, validated currency, lock release on shutdown, per-IP login limit, unit-only npm test

fix(ui): split editor usable without JS, untrack prop snapshots, clean orphan photo on conflict

fix(ui): explicit payer choice, validated settle-up prefill, sticky delete confirm, degraded balances

fix(auth): gate admin routes on the decoded path and in the actions themselves

fix(ui): shared safe-next validation, no lockout on success, logout origin check, tab/feed polish

feat(ui): add balances page with simplified debts and settle-up links

feat(ui): add settlement create, detail, edit and delete

feat(ui): add expense detail, edit with version check, delete, photo serving

feat(ui): add expense form with live split editor and photo upload

feat(ui): add admin user management and storage/compaction page

feat(ui): add expense feed grouped by month

feat(ui): add profile page and forced password change

feat(ui): add layout, tab bar, login and logout

chore: scaffold SvelteKit project with Tailwind, Vitest, adapter-node