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-portal-employee/src/stores/modules/keepAlive.ts

@@ -0,0 +1,32 @@
+import { defineStore } from 'pinia';
+
+export const useKeepAliveStore = defineStore(
+  'keep-alive',
+  () => {
+    const keepAliveName = ref<string[]>([]);
+
+    const addKeepAliveName = (name: string) => {
+      if (!keepAliveName.value.includes(name)) {
+        keepAliveName.value.push(name);
+      }
+    };
+
+    const removeKeepAliveName = (name: string) => {
+      keepAliveName.value = keepAliveName.value.filter(item => item !== name);
+    };
+
+    const setKeepAliveName = (name: string[]) => {
+      keepAliveName.value = name;
+    };
+
+    return {
+      keepAliveName,
+      addKeepAliveName,
+      removeKeepAliveName,
+      setKeepAliveName,
+    };
+  },
+  {
+    persist: true,
+  },
+);