fix: remove permissions module mock from tournament-update tests to prevent test pollution

tournament-update.test.ts was mocking the entire @/lib/permissions module,
which replaced canManageTournament globally and caused permissions.test.ts
to fail when run in the same process.

Instead of mocking permissions, mock its dependencies (auth-simple and prisma)
so canManageTournament runs through naturally.

src/__tests__/unit/tournament-update.test.ts

@@ -8,12 +8,32 @@ import { describe, it, expect, mock, beforeEach,} from 'bun:test';
 // Create mock functions at module level
 const eventFindUniqueMock = mock(async () => ({}));
 const eventUpdateMock = mock(async () => ({}));
-const canManageTournamentMock = mock(async () => ({ allowed: true }));
-const canDeleteTournamentMock = mock(async () => ({ allowed: true }));
+const userFindUniqueMock = mock(async () => ({
+  id: 'admin-1',
+  email: 'admin@example.com',
+  role: 'club_admin',
+  emailVerified: false,
+  name: null,
+  image: null,
+  playerId: null,
+  createdAt: new Date(),
+  updatedAt: new Date(),
+}));
 
-// Mock prisma first
+// Mock auth-simple to return a valid session
+mock.module('@/lib/auth-simple', () => ({
+  getSession: mock(async () => ({
+    user: { id: 'admin-1', email: 'admin@example.com' },
+    session: { token: 'test', expiresAt: new Date() }
+  })),
+}));
+
+// Mock prisma with user and event
 mock.module('@/lib/prisma', () => ({
   prisma: {
+    user: {
+      findUnique: userFindUniqueMock,
+    },
     event: {
       findUnique: eventFindUniqueMock,
       update: eventUpdateMock,
@@ -21,12 +41,6 @@ mock.module('@/lib/prisma', () => ({
   },
 }));
 
-// Mock the permissions module
-mock.module('@/lib/permissions', () => ({
-  canManageTournament: canManageTournamentMock,
-  canDeleteTournament: canDeleteTournamentMock,
-}));
-
 // Import the route handler after mocking
 import { PUT } from '@/app/api/tournaments/[id]/route';
 import { prisma } from '@/lib/prisma';
@@ -36,8 +50,7 @@ describe('Tournament Update API', () => {
     // Clear all mock history before each test
     eventFindUniqueMock.mockClear();
     eventUpdateMock.mockClear();
-    canManageTournamentMock.mockClear();
-    canDeleteTournamentMock.mockClear();
+    userFindUniqueMock.mockClear();
   });
 
   it('should update allowTies field when provided', async () => {