fix(quota): remove duplicate quiz_generation reserve in router

Quota reserve is now centralized in UserAiController.createAnalysisJob.
Router no longer needs QuotaGuardService injection.

Co-Authored-By: Claude <noreply@anthropic.com>

src/modules/ai-runtime/quiz-execution-router.spec.ts

@@ -4,7 +4,6 @@ import { FeatureFlagService } from '../config/feature-flag.service';
 import { QuizGenerationSnapshotBuilder } from '../ai-job/quiz-generation-snapshot-builder';
 import { AiJobCreationService } from '../ai-job/ai-job-creation.service';
 import { UserAiService } from './user-ai.service';
-import { QuotaGuardService } from '../membership/quota-guard.service';
 import * as crypto from 'crypto';
 
 function dto(overrides?: any) {
@@ -42,10 +41,6 @@ describe('QuizExecutionRouter', () => {
       })),
     };
     mockLegacy = { createAnalysisJob: jest.fn() };
-    const mockQuotaGuard = {
-      check: jest.fn().mockResolvedValue({ allowed: true, quotaType: 'quiz_generation', limit: 30, used: 0, remaining: 30, resetAt: null, upgradeAvailable: false }),
-      buildError: jest.fn().mockReturnValue({ errorCode: 'QUOTA_EXCEEDED', message: '', quotaType: 'quiz_generation', limit: 30, used: 30, remaining: 0, resetAt: null, upgradeAvailable: true }),
-    };
 
     const module: TestingModule = await Test.createTestingModule({
       providers: [
@@ -54,7 +49,6 @@ describe('QuizExecutionRouter', () => {
         { provide: QuizGenerationSnapshotBuilder, useValue: mockSnapshot },
         { provide: AiJobCreationService, useValue: mockCreation },
         { provide: UserAiService, useValue: mockLegacy },
-        { provide: QuotaGuardService, useValue: mockQuotaGuard },
       ],
     }).compile();
 

src/modules/ai-runtime/quiz-execution-router.ts

@@ -1,4 +1,4 @@
-import { Injectable, Logger, BadRequestException } from '@nestjs/common';
+import { Injectable, Logger } from '@nestjs/common';
 import * as crypto from 'crypto';
 import { FeatureFlagService } from '../config/feature-flag.service';
 import { QuizGenerationSnapshotBuilder } from '../ai-job/quiz-generation-snapshot-builder';
@@ -6,7 +6,6 @@ import type { QuizGenerationSnapshotInput } from '../ai-job/quiz-generation-snap
 import { AiJobCreationService } from '../ai-job/ai-job-creation.service';
 import { UserAiService } from './user-ai.service';
 import type { CreateAnalysisJobDto } from './user-ai.dto';
-import { QuotaGuardService } from '../membership/quota-guard.service';
 
 /**
  * M-AI-07-05 / M-AI-07-CLEANUP: Quiz Execution Router
@@ -35,16 +34,10 @@ export class QuizExecutionRouter {
     private readonly snapshotBuilder: QuizGenerationSnapshotBuilder,
     private readonly creationService: AiJobCreationService,
     private readonly legacyService: UserAiService,
-    private readonly quotaGuard: QuotaGuardService,
   ) {}
 
   async generateQuiz(userId: string, dto: CreateAnalysisJobDto) {
-    // M-MEMBER-01-08: quiz_generation 接入统一额度（参考集成）
+    // M-MEMBER-01-CLOSE-01A: 额度预占已由 UserAiController 集中处理，此处不再重复 reserve
-    const quotaOpId = dto.idempotencyKey ?? `quiz_gen:${dto.targetType}:${dto.targetId}:${Date.now()}`;
-    const check = await this.quotaGuard.check(userId, 'quiz_generation', quotaOpId);
-    if (!check.allowed) {
-      throw new BadRequestException(this.quotaGuard.buildError(check));
-    }
 
     const useUnified = await this.shouldUseUnified(userId);