P0-1/P0-2/P1-1: dimensions form + E2E tests + PDF export

P0-1 Backend: dimensions column on template entity + validation
P0-1 Frontend: dimensions edit UI in TemplateManager
P0-2: routeAfterGrading unit tests (10 cases), service spec fix + certificate tests, jest-e2e.json
P1-1: proper PDF generation with embedded CJK font via pdf-lib low-level API

server/src/assessment/assessment.controller.spec.ts

@@ -5,6 +5,7 @@ import { AssessmentService } from './assessment.service';
 import { TenantService } from '../tenant/tenant.service';
 import { UserService } from '../user/user.service';
 import { CombinedAuthGuard } from '../auth/combined-auth.guard';
+import { ExportService } from './services/export.service';
 
 describe('AssessmentController', () => {
   let controller: AssessmentController;
@@ -23,8 +24,9 @@ describe('AssessmentController', () => {
       controllers: [AssessmentController],
       providers: [
         { provide: AssessmentService, useFactory: mockService },
-        { provide: 'UserService', useFactory: mockService },
+        { provide: UserService, useFactory: mockService },
         { provide: TenantService, useFactory: mockService },
+        { provide: ExportService, useFactory: mockService },
         { provide: Reflector, useFactory: mockReflector },
         { provide: CombinedAuthGuard, useFactory: mockGuard },
       ],