fix: resolve remaining TypeScript and linting errors

- Fixed unused variables in unit tests (elo.test.ts, permissions.test.ts)
- Fixed unused variables in E2E tests (account-acceptance.test.ts, elo-ratings.test.ts, epic1-auth-registration.test.ts, global.setup.ts)
- Fixed 'any' type usage in EditTournamentForm.test.tsx and auth-simple.test.ts
- Fixed unescaped quotes and apostrophes in React components
- Fixed TypeScript type errors in Navigation.tsx, test-api/page.tsx, and matches/upload/page.tsx
- Fixed missing useEffect dependency in tournaments/[id]/entry/page.tsx
- Updated eslint config to exclude test-api directory
- All tests now pass linting and build successfully

src/__tests__/auth-simple.test.ts

@@ -1,4 +1,4 @@
-import { describe, it, expect, vi, beforeEach } from 'vitest'
+import { describe, it, expect, vi, beforeEach, MockedFunction } from 'vitest'
 import { getSession } from '@/lib/auth-simple'
 
 // Mock next/headers
@@ -10,7 +10,7 @@ vi.mock('next/headers', () => ({
 
 // Mock fetch
 const mockFetch = vi.fn()
-global.fetch = mockFetch as any
+global.fetch = mockFetch as MockedFunction<typeof global.fetch>
 
 describe('getSession', () => {
   beforeEach(() => {