Align repo config with global development standards

- Add missing tsconfig strictness flags (noUncheckedIndexedAccess,
  exactOptionalPropertyTypes, noImplicitOverride,
  noPropertyAccessFromIndexSignature) and fix all resulting type errors
- Replace ESLint/Prettier with oxlint 1.48.0 and oxfmt 0.33.0
- Pin all frontend and backend dependencies to exact versions
- Pin GitHub Actions to SHA hashes with persist-credentials: false
- Fix CI Python version mismatch (3.12 -> 3.14) and ruff target-version
- Add vitest 4.0.18 with jsdom environment for frontend testing
- Add ty 0.0.17 for Python type checking (non-blocking in CI)
- Add actionlint and zizmor CI job for workflow linting and security audit
- Add Dependabot config for npm, pip, and github-actions
- Update CLAUDE.md and pre-commit hooks to reflect new tooling
- Ignore Claude Code sandbox artifacts in gitignore

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/components/RuleBadges.tsx

@@ -9,11 +9,7 @@ export function RuleBadges({ rules }: RuleBadgesProps) {
   const enabledRules = RULE_DEFINITIONS.filter((def) => rules[def.key])
 
   if (enabledRules.length === 0) {
-    return (
-      <span className="text-sm text-gray-500 dark:text-gray-400">
-        No rules enabled
-      </span>
-    )
+    return <span className="text-sm text-gray-500 dark:text-gray-400">No rules enabled</span>
   }
 
   return (