feat: DingTalk attendance import + integration config + expense types + UI polish

Server:
- Add DingTalk attendance import service with SSE progress streaming
- Add IntegrationConfig entity & module for multi-tenant DingTalk setup
- Add ExpenseType entity & ExpenseTypesModule
- Add SeedModule for DB initialization
- Add UserDingMapping entity for DingTalk user linkage
- Attendance service: import flow with dedup & student auto-mapping
- Rooms service: time-range overlap queries
- Sync controller/service: DingTalk integration wiring
- Permission guard: refactor to pure re-export
- Campus scope middleware: tenant-aware filtering

Admin UI:
- Attendance page: import UI with progress & result summary
- All pages: tableStyle/tablePagination standardization
- Login page: responsive styling
- Sensitive data: useViewSensitive hook for masked viewing
- Vite config: path aliases, build optimization
- Test infra: vitest config, test utilities

Docs: PRD DingTalk batch 1 & 2 design docs

apps/server/src/seed/seed.module.ts

@@ -0,0 +1,58 @@
+import { Module, OnModuleInit, Logger } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { SeedDevService } from './seed-dev.service';
+import {
+  Student, Room, Occupancy, RoomExpense,
+  Bill, BillItem, User, Deposit,
+  Classroom, Tenant, ClassroomRental, Permission, Role,
+  Class, ClassStudent, ClassTeacher, ClassSchedule,
+  AttendanceRecord, Department, UserDepartment,
+  StudentProfile, StudentEnrollment, ExamScore, LearningRecord,
+  ExpenseType,
+} from '../entities';
+
+const SEED_ENTITIES = [
+  Department, User, Role, Permission, UserDepartment,
+  Tenant, Student, Room, Classroom, Occupancy,
+  RoomExpense, ExpenseType, Class,
+  ClassStudent, ClassTeacher, ClassSchedule, Bill, BillItem,
+  Deposit, AttendanceRecord,
+  ClassroomRental, StudentProfile, StudentEnrollment,
+  ExamScore, LearningRecord,
+];
+
+@Module({
+  imports: [TypeOrmModule.forFeature(SEED_ENTITIES)],
+  providers: [SeedDevService],
+})
+export class SeedModule implements OnModuleInit {
+  private readonly logger = new Logger(SeedModule.name);
+
+  constructor(private readonly seedService: SeedDevService) {}
+
+  async onModuleInit() {
+    const enabled = process.env['SEED_DEV'] === 'true' || process.env['NODE_ENV'] === 'development';
+    const skip = process.env['SEED_DEV_SKIP'] === 'true';
+
+    if (!enabled || skip) {
+      this.logger.log(
+        `Seed skipped: SEED_DEV=${process.env['SEED_DEV']}, NODE_ENV=${process.env['NODE_ENV']}, SKIP=${skip}`,
+      );
+      return;
+    }
+
+    const studentCount = await this.seedService.getStudentCount();
+    if (studentCount > 0) {
+      this.logger.log(`Seed skipped: ${studentCount} students already exist`);
+      return;
+    }
+
+    this.logger.log('Starting mock data seeding...');
+    try {
+      await this.seedService.seed();
+      this.logger.log('Mock data seeding completed successfully');
+    } catch (err) {
+      this.logger.error('Mock data seeding failed', err instanceof Error ? err.stack : String(err));
+    }
+  }
+}