feature/dependency upgrades

[codebude]

• Update frontend and Python dependency lockfiles with minor safe/upgrades
• Migrate frontend imports to #lib and upgrade SvelteKit/Vitest
• Ignore intentional Pydantic deprecation warnings in backend tests
• Document Node.js 22.17 requirement and SvelteKit 3 upgrade

[github-actions]

🧪 Test Results — 03690fc

✅ Backend (pytest) — 1099 passed, 0 failed, 0 skipped (1099 total)
✅ CLI (pytest) — 54 passed, 0 failed, 0 skipped (54 total)
✅ Frontend (vitest) — 543 passed, 0 failed, 0 skipped (543 total)
✅ E2E (Playwright) — 79 passed, 0 failed, 0 skipped (79 total)

Summary: ✅ All 1775 tests passed