feat: 新增多角色系统（派单/分润/推广/区域）

- 后端：RlzDispatch/Profit/Promotion/Region 控制器、服务、Mapper、领域模型
- 权限：MethodSecurityConfig + PermissionInterceptor
- 管理后台：派单/分润/推广/区域 页面与 API
- Android 陪护端：派单/运营/退款 Fragment 及布局
- 小程序：推广员子包、派单/运营/退款/检索子包、自定义 tabBar
- 文档：多角色系统方案、角色权限矩阵、用户操作手册等

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

coupon/custom-tab-bar/index.js

@@ -0,0 +1,39 @@
+var app = getApp();
+
+Component({
+  data: {
+    selected: 0,
+    tabs: []
+  },
+
+  lifetimes: {
+    attached() {
+      this._lastRole = '';
+      this.updateTabs();
+    }
+  },
+
+  pageLifetimes: {
+    show() {
+      this.updateTabs();
+    }
+  },
+
+  methods: {
+    // 仅当角色实际变化时才更新 tabs，避免无意义重渲染
+    updateTabs() {
+      var userType = app.globalData.userType || 'C';
+      if (this._lastRole === userType) return;
+      this._lastRole = userType;
+      var tabs = app.globalData.ROLE_TABS[userType] || app.globalData.ROLE_TABS['C'];
+      this.setData({ tabs: tabs });
+    },
+
+    switchTab(e) {
+      var index = e.currentTarget.dataset.index;
+      var pages = ['/pages/index/index', '/pages/service/service', '/pages/order/order', '/pages/my/my'];
+      if (this.data.selected === index) return;
+      wx.switchTab({ url: pages[index] });
+    }
+  }
+});