feat: 添加员工门户项目及相关后端改造

- 新增 hzhub-portal-employee 员工门户前端项目（基于 Vue3 + Element Plus）
- 后端登录接口增加返回 nickName 字段
- 移除 KnowledgeInfoController 的 @SaCheckPermission 注解
- 删除 hzhub-portal-company 旧门户项目
- 更新项目文档和架构说明
- 添加后台运行管理脚本（start-all.sh / status-all.sh / stop-all.sh）
- 更新 docker-compose 配置

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

hzhub-deploy/docker-compose.yml

@@ -84,7 +84,7 @@ services:
       - "6039:6039"
     environment:
       SPRING_PROFILES_ACTIVE: dev
-      SPRING_DATASOURCE_DYNAMIC_DATASOURCE_MASTER_URL: jdbc:mysql://hzhub-mysql:3306/ruoyi_ai?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8&autoReconnect=true&rewriteBatchedStatements=true&allowPublicKeyRetrieval=true&nullCatalogMeansCurrent=true
+      SPRING_DATASOURCE_DYNAMIC_DATASOURCE_MASTER_URL: jdbc:mysql://hzhub-mysql:3306/hzhub?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8&autoReconnect=true&rewriteBatchedStatements=true&allowPublicKeyRetrieval=true&nullCatalogMeansCurrent=true
       SPRING_DATASOURCE_DYNAMIC_DATASOURCE_MASTER_USERNAME: root
       SPRING_DATASOURCE_DYNAMIC_DATASOURCE_MASTER_PASSWORD: hzhub123
       SPRING_DATA_REDIS_HOST: hzhub-redis
@@ -127,12 +127,12 @@ services:
     networks:
       - hzhub-network
 
-  # hzhub-portal-company (公司门户)
-  hzhub-portal-company:
+  # hzhub-portal-employee (员工门户)
+  hzhub-portal-employee:
     build:
-      context: ../hzhub-portal-company
+      context: ../hzhub-portal-employee
       dockerfile: Dockerfile
-    container_name: hzhub-portal-company
+    container_name: hzhub-portal-employee
     ports:
       - "5137:5137"
     environment: