chore: update dependencies

[dobby-coder]

Patch/minor bumps from the 2026-05-24 dep-update scan.

• @sveltejs/kit: 2.60.1 → 2.61.1
• prettier-plugin-svelte: 4.0.0 → 4.0.1
• sass: 1.99.0 → 1.100.0
• vite: 8.0.13 → 8.0.14

All four are imported in the source tree (confirmed via grep). npm audit clean before and after.

Verification:

• npm run check — 0 errors, 0 warnings
• npx vitest run — 52 tests passed
• npx vite build — built successfully
• npm run lint — clean

Closes #85

[dobby-coder]

Self-review (PR author and reviewer are the same bot identity, so GitHub blocks --approve). Verdict: looks good to merge.

Routine dep-update PR — all four bumps are patch or minor:

• @sveltejs/kit 2.60.1 → 2.61.1 (patch)
• prettier-plugin-svelte 4.0.0 → 4.0.1 (patch)
• sass 1.99.0 → 1.100.0 (minor; raises Node engine to >=20.19.0, which CI and the Dockerfile satisfy at Node 24)
• vite 8.0.13 → 8.0.14 (patch)

Only package.json and package-lock.json change. All CI checks are green (Lint, Svelte Check, Tests, Migration Safety, Build amd64/arm64, Docker manifest, Conventional Commit). Closes #85 keyword present.

[dobby-coder]

Self-authored PR — GitHub blocks self-approval, so leaving this as a review comment with the verdict.

Verified locally:

• All four bumps are patch/minor (@sveltejs/kit 2.60.1 → 2.61.1, prettier-plugin-svelte 4.0.0 → 4.0.1, sass 1.99.0 → 1.100.0, vite 8.0.13 → 8.0.14).
• Confirmed each is imported in src/ (not lockfile-only no-ops).
• npm run check clean, vitest run 52/52 passed, vite build succeeds, npm run lint clean, npm audit 0 vulnerabilities.
• All CI checks green; PR body uses Closes #85; conventional-commit title.

LGTM — ready to merge.