feat: 完成sys模块迁移，对齐PHP/Java框架

- 重构sys模块架构，严格按admin/api/core分层
- 对齐所有sys实体与数据库表结构
- 实现完整的adminapi控制器，匹配PHP/Java契约
- 修复依赖注入问题，确保服务正确注册
- 添加自动迁移工具和契约验证
- 完善多租户支持和审计功能
- 统一命名规范，与PHP业务逻辑保持一致

wwjcloud/src/common/sys/services/admin/sysDict.service.ts

@@ -0,0 +1,20 @@
+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { SysDict } from '../../entity/sysDict.entity';
+
+@Injectable()
+export class SysDictService {
+  constructor(
+    @InjectRepository(SysDict)
+    private readonly dictRepo: Repository<SysDict>,
+  ) {}
+
+  async list() {
+    return this.dictRepo.find({ order: { id: 'ASC' } as any });
+  }
+
+  async getByKey(key: string) {
+    return this.dictRepo.findOne({ where: { key } as any });
+  }
+}