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/api/bosses.ts

@@ -1,14 +1,7 @@
 import { api } from './client'
-import type {
-  BossBattle,
-  BossResult,
-  CreateBossResultInput,
-} from '../types/game'
+import type { BossBattle, BossResult, CreateBossResultInput } from '../types/game'
 
-export function getGameBosses(
-  gameId: number,
-  all?: boolean
-): Promise<BossBattle[]> {
+export function getGameBosses(gameId: number, all?: boolean): Promise<BossBattle[]> {
   const params = all ? '?all=true' : ''
   return api.get(`/games/${gameId}/bosses${params}`)
 }
@@ -17,16 +10,10 @@ export function getBossResults(runId: number): Promise<BossResult[]> {
   return api.get(`/runs/${runId}/boss-results`)
 }
 
-export function createBossResult(
-  runId: number,
-  data: CreateBossResultInput
-): Promise<BossResult> {
+export function createBossResult(runId: number, data: CreateBossResultInput): Promise<BossResult> {
   return api.post(`/runs/${runId}/boss-results`, data)
 }
 
-export function deleteBossResult(
-  runId: number,
-  resultId: number
-): Promise<void> {
+export function deleteBossResult(runId: number, resultId: number): Promise<void> {
   return api.del(`/runs/${runId}/boss-results/${resultId}`)
 }