chore: improve tooling, linting, testing, and CI

- Add LICENSE file (CC BY-NC-SA 4.0)
- Add .nvmrc pinning Node 22
- Add Renovate config with daily schedule and Gitea Actions workflow
- Reduce ESLint max-warnings from 1000 to 50
- Re-enable Biome a11y/security recommended rules
- Fix Biome lint issues (a11y, hook deps, SVG labels, checkbox semantics)
- Improve CI: run on pushes to feat/fix branches, add pnpm audit
- Add Vitest coverage with v8 provider and thresholds
- Add E2E tests (auth, admin, navigation specs)
- Add admin-maintenance server action test
- Install @vitest/coverage-v8
- Ignore coverage/ directory

src/components/auth/login-form.tsx

@@ -133,7 +133,6 @@ export function LoginForm({
 							placeholder={t("codePlaceholder")}
 							inputMode="numeric"
 							autoComplete="one-time-code"
-							autoFocus
 							className="input-glow w-full rounded-xl border-2 px-4 py-3 text-sm font-medium transition-all focus:outline-none"
 							style={{
 								backgroundColor: "var(--color-background)",
@@ -173,6 +172,8 @@ export function LoginForm({
 								className="animate-spin h-4 w-4"
 								viewBox="0 0 24 24"
 								fill="none"
+								role="img"
+								aria-label="Loading"
 							>
 								<circle
 									className="opacity-25"