✅ test(files): fix type casting issues in file integration tests

- correct type casting from File[] to unknown as File[] to resolve type errors
- add mock for AppDataSource to complete test dependencies
- fix type assertions in getList and getById service mocks

src/server/api/files/__tests__/files.integration.test.ts

@@ -4,9 +4,11 @@ import { DataSource } from 'typeorm';
 import { FileService } from '@/server/modules/files/file.service';
 import { authMiddleware } from '@/server/middleware/auth.middleware';
 import { fileApiRoutes } from '@/server/api';
+import { AppDataSource } from '@/server/data-source';
 
 vi.mock('@/server/modules/files/file.service');
 vi.mock('@/server/middleware/auth.middleware');
+vi.mock('@/server/data-source');
 
 describe('File API Integration Tests', () => {
   let client: ReturnType<typeof testClient<typeof fileApiRoutes>>['api']['v1'];
@@ -496,7 +498,7 @@ describe('File API Integration Tests', () => {
         }
       ];
 
-      const mockGetList = vi.fn().mockResolvedValue([mockFiles as File[], mockFiles.length]);
+      const mockGetList = vi.fn().mockResolvedValue([mockFiles as unknown as File[], mockFiles.length]);
       vi.mocked(FileService).mockImplementation(() => ({
         getList: mockGetList
       } as unknown as FileService));
@@ -531,7 +533,7 @@ describe('File API Integration Tests', () => {
         uploadUserId: 1
       };
 
-      const mockGetById = vi.fn().mockResolvedValue(mockFile as File);
+      const mockGetById = vi.fn().mockResolvedValue(mockFile as unknown as File);
       vi.mocked(FileService).mockImplementation(() => ({
         getById: mockGetById
       } as unknown as FileService));
@@ -566,7 +568,7 @@ describe('File API Integration Tests', () => {
         }
       ];
 
-      const mockGetList = vi.fn().mockResolvedValue([mockFiles as File[], mockFiles.length]);
+      const mockGetList = vi.fn().mockResolvedValue([mockFiles as unknown as File[], mockFiles.length]);
       vi.mocked(FileService).mockImplementation(() => ({
         getList: mockGetList
       } as unknown as FileService));