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/pages/admin/AdminGames.tsx

@@ -2,11 +2,7 @@ import { useState, useMemo } from 'react'
 import { AdminTable, type Column } from '../../components/admin/AdminTable'
 import { GameFormModal } from '../../components/admin/GameFormModal'
 import { useGames } from '../../hooks/useGames'
-import {
-  useCreateGame,
-  useUpdateGame,
-  useDeleteGame,
-} from '../../hooks/useAdmin'
+import { useCreateGame, useUpdateGame, useDeleteGame } from '../../hooks/useAdmin'
 import { exportGames } from '../../api/admin'
 import { downloadJson } from '../../utils/download'
 import type { Game, CreateGameInput, UpdateGameInput } from '../../types'
@@ -22,10 +18,7 @@ export function AdminGames() {
   const [regionFilter, setRegionFilter] = useState('')
   const [genFilter, setGenFilter] = useState('')
 
-  const regions = useMemo(
-    () => [...new Set(games.map((g) => g.region))].sort(),
-    [games]
-  )
+  const regions = useMemo(() => [...new Set(games.map((g) => g.region))].sort(), [games])
   const generations = useMemo(
     () => [...new Set(games.map((g) => g.generation))].sort((a, b) => a - b),
     [games]
@@ -34,8 +27,7 @@ export function AdminGames() {
   const filteredGames = useMemo(() => {
     let result = games
     if (regionFilter) result = result.filter((g) => g.region === regionFilter)
-    if (genFilter)
-      result = result.filter((g) => g.generation === Number(genFilter))
+    if (genFilter) result = result.filter((g) => g.generation === Number(genFilter))
     return result
   }, [games, regionFilter, genFilter])