Refactor: Update mocks in test files for improved structure and clarity

src/routes/admin.system.routes.test.ts

@@ -14,7 +14,12 @@ vi.mock('../services/geocodingService.server', () => ({
 }));
 
 // Mock other dependencies that are part of the adminRouter setup but not directly tested here
-vi.mock('../services/db/admin.db');
+vi.mock('../services/db/index.db', () => ({
+  adminRepo: {},
+  flyerRepo: {},
+  recipeRepo: {},
+  userRepo: {},
+}));
 vi.mock('../services/db/flyer.db');
 vi.mock('../services/db/recipe.db');
 vi.mock('../services/db/user.db');