fix: import paths + dead code cleanup + export ProcessResult

- Fix PrismaService/PrismaModule import paths (infrastructure/database/)
- Remove dead upsertFromReadingEvent wrappers in learning-activity/learning-session services
- Export ProcessResult interface for controller return type

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/modules/learning-activity/learning-activity.service.ts

@@ -130,13 +130,5 @@ export class LearningActivityService {
   }
 
   /** M8: Upsert daily activity from a reading event. */
-  async upsertFromReadingEvent(data: {
-    userId: string;
-    activityDate: Date;
-    activeSecondsDelta: number;
-    isNewMaterial?: boolean;
-    isMarkedRead?: boolean;
-  }) {
-    return this.repository.upsertFromReadingEvent(data);
-  }
+  // M8: upsert handled directly by repository in ProcessorService transaction — remove unused wrapper
 }

src/modules/learning-record/learning-record.module.ts

@@ -1,5 +1,5 @@
 import { Module } from '@nestjs/common';
-import { PrismaModule } from '../../infrastructure/prisma.module';
+import { PrismaModule } from '../../infrastructure/database/prisma.module';
 import { LearningRecordService } from './learning-record.service';
 
 @Module({

src/modules/learning-record/learning-record.service.ts

@@ -1,5 +1,5 @@
 import { Injectable } from '@nestjs/common';
-import { PrismaService } from '../../infrastructure/prisma.service';
+import { PrismaService } from '../../infrastructure/database/prisma.service';
 
 export const LEARNING_RECORD_TYPES = [
   'reading',

src/modules/learning-session/learning-session.service.ts

@@ -19,19 +19,4 @@ export class LearningSessionService {
     return this.repository.findByUserId(userId, opts);
   }
 
-  /** Upsert a session from a reading event (M8 aggregation). */
-  async upsertFromReadingEvent(data: {
-    userId: string;
-    clientSessionId: string;
-    materialId: string;
-    readingTargetType: string;
-    knowledgeBaseId?: string | null;
-    eventType: string;
-    activeSecondsDelta: number;
-    position?: any;
-    timestampMs: number;
-    startedAt: Date;
-  }) {
-    return this.repository.upsertByClientSession(data);
-  }
 }

src/modules/material-reading-progress/material-reading-progress.module.ts

@@ -1,5 +1,5 @@
 import { Module } from '@nestjs/common';
-import { PrismaModule } from '../../infrastructure/prisma.module';
+import { PrismaModule } from '../../infrastructure/database/prisma.module';
 import { MaterialReadingProgressService } from './material-reading-progress.service';
 
 @Module({

src/modules/material-reading-progress/material-reading-progress.service.ts

@@ -1,5 +1,5 @@
 import { Injectable } from '@nestjs/common';
-import { PrismaService } from '../../infrastructure/prisma.service';
+import { PrismaService } from '../../infrastructure/database/prisma.service';
 
 @Injectable()
 export class MaterialReadingProgressService {

src/modules/reading-event/reading-event-processor.service.ts

@@ -1,5 +1,5 @@
 import { Injectable } from '@nestjs/common';
-import { PrismaService } from '../../infrastructure/prisma.service';
+import { PrismaService } from '../../infrastructure/database/prisma.service';
 import { LearningSessionRepository } from '../learning-session/learning-session.repository';
 import { LearningActivityRepository } from '../learning-activity/learning-activity.repository';
 import { LearningRecordService } from '../learning-record/learning-record.service';
@@ -12,7 +12,7 @@ const VALID_EVENT_TYPES = new Set([
 const VALID_TARGET_TYPES = new Set(['knowledge_source', 'temporary_file']);
 const MAX_DELTA = 300;
 
-interface ProcessResult {
+export interface ProcessResult {
   processed: number;
   duplicate: number;
   failed: number;

src/modules/reading-event/reading-event.controller.ts

@@ -1,6 +1,6 @@
 import { Body, Controller, Param, Post, Query, Req, UseGuards, UsePipes, ValidationPipe } from '@nestjs/common';
 import { JwtAuthGuard } from '../../common/guards/jwt-auth.guard';
-import { PrismaService } from '../../infrastructure/prisma.service';
+import { PrismaService } from '../../infrastructure/database/prisma.service';
 import { BatchUploadReadingEventsDto } from './reading-event.dto';
 import { ReadingEventProcessorService } from './reading-event-processor.service';
 

src/modules/reading-event/reading-event.module.ts

@@ -1,5 +1,5 @@
 import { Module } from '@nestjs/common';
-import { PrismaModule } from '../../infrastructure/prisma.module';
+import { PrismaModule } from '../../infrastructure/database/prisma.module';
 import { LearningSessionModule } from '../learning-session/learning-session.module';
 import { LearningActivityModule } from '../learning-activity/learning-activity.module';
 import { LearningRecordModule } from '../learning-record/learning-record.module';

src/modules/reading-event/reading-event.service.ts

@@ -1,5 +1,5 @@
 import { Injectable } from '@nestjs/common';
-import { PrismaService } from '../../infrastructure/prisma.service';
+import { PrismaService } from '../../infrastructure/database/prisma.service';
 
 @Injectable()
 export class ReadingEventService {

src/modules/reading/reading.controller.ts

@@ -1,6 +1,6 @@
 import { Controller, Get, Param, Query, Req, UseGuards } from '@nestjs/common';
 import { JwtAuthGuard } from '../../common/guards/jwt-auth.guard';
-import { PrismaService } from '../../infrastructure/prisma.service';
+import { PrismaService } from '../../infrastructure/database/prisma.service';
 import { LearningActivityRepository } from '../learning-activity/learning-activity.repository';
 import { LearningRecordService } from '../learning-record/learning-record.service';
 import { MaterialReadingProgressService } from '../material-reading-progress/material-reading-progress.service';

src/modules/reading/reading.module.ts

@@ -1,5 +1,5 @@
 import { Module } from '@nestjs/common';
-import { PrismaModule } from '../../infrastructure/prisma.module';
+import { PrismaModule } from '../../infrastructure/database/prisma.module';
 import { LearningActivityModule } from '../learning-activity/learning-activity.module';
 import { LearningRecordModule } from '../learning-record/learning-record.module';
 import { MaterialReadingProgressModule } from '../material-reading-progress/material-reading-progress.module';

src/modules/temporary-reading-material/temporary-reading-material.module.ts

@@ -1,5 +1,5 @@
 import { Module } from '@nestjs/common';
-import { PrismaModule } from '../../infrastructure/prisma.module';
+import { PrismaModule } from '../../infrastructure/database/prisma.module';
 import { TemporaryReadingMaterialService } from './temporary-reading-material.service';
 
 @Module({

src/modules/temporary-reading-material/temporary-reading-material.service.ts

@@ -1,5 +1,5 @@
 import { Injectable } from '@nestjs/common';
-import { PrismaService } from '../../infrastructure/prisma.service';
+import { PrismaService } from '../../infrastructure/database/prisma.service';
 
 @Injectable()
 export class TemporaryReadingMaterialService {