feat(invitation): 实现邀请返利系统、专属注册落地页与分成管理

- 数据库与数据模型：新增 migration 000081，支持用户专属邀请码、被邀请人绑定与实名时间戳；新增邀请返利配置表与结算明细表
- 业务与结算逻辑：实现首月 60%、次月 30%、往后 15% 阶梯返利算法；买卖双向独立寻源并根据订单平台利润 50% 单边基准核算；与终态订单结算和钱包可用余额强幂等联动
- 分销站点支持：支持主站与加盟分站独立配置返利比例；跨站交易按照收号端与售卖端独立出资，资金互不侵蚀
- 前端交互与入口：
  - 新增专属短链注册落地页 /i/:code，自动带入并锁定邀请码，引导实名认证
  - 个人中心与移动端新增邀请返利看板（专属码、推广链接、统计面板、好友记录与返利流水明细）
  - 管理后台新增邀请返利管理（比例配置、邀请关系与返利流水审计）
- 验证方式：
  - 通过 repository_test.go 单元测试（阶梯区间、实名激活、跨站多方分流验证）
  - 通过 npm run format、npm run check 与 scripts/check.sh 全量门禁校验

frontend/src/router/accountRoutes.ts

@@ -60,6 +60,12 @@ export const accountRoutes: RouteRecordRaw[] = [
     component: () => import('@/features/auth/views/RealnameView.vue'),
     meta: { requiresAuth: true },
   },
+  {
+    path: '/invitations',
+    name: 'user-invitations',
+    component: () => import('@/features/invitation/views/UserInvitationView.vue'),
+    meta: { requiresAuth: true },
+  },
   {
     path: '/post-rental-notice',
     name: 'post-rental-notice',

frontend/src/router/adminRoutes.ts

@@ -252,4 +252,10 @@ export const adminRoutes: RouteRecordRaw[] = [
     component: () => import('@/features/admin/views/AdminTrackingLinksView.vue'),
     meta: adminMeta,
   },
+  {
+    path: adminPath('invitations'),
+    name: 'admin-invitations',
+    component: () => import('@/features/admin/views/AdminInvitationsView.vue'),
+    meta: adminMeta,
+  },
 ]

frontend/src/router/mobileRoutes.ts

@@ -73,6 +73,12 @@ export const mobileRoutes: RouteRecordRaw[] = [
     component: () => import('@/features/auth/views/MobileRealnameView.vue'),
     meta: { layout: 'blank', requiresAuth: true },
   },
+  {
+    path: '/m/invitations',
+    name: 'mobile-invitations',
+    component: () => import('@/features/invitation/views/UserInvitationView.vue'),
+    meta: { layout: 'blank', requiresAuth: true },
+  },
   {
     path: '/m/profile',
     name: 'mobile-profile',

frontend/src/router/publicRoutes.ts

@@ -39,6 +39,13 @@ export const publicRoutes: RouteRecordRaw[] = [
     name: 'crash-detail',
     component: () => import('@/features/mohong/views/MohongDetailView.vue'),
   },
+  // 专属邀请注册落地页
+  {
+    path: '/i/:code',
+    name: 'invite-register',
+    component: () => import('@/features/invitation/views/InviteRegisterView.vue'),
+    meta: { layout: 'blank' },
+  },
   // 旧路径兼容
   { path: '/mohong', redirect: '/crash' },
   { path: '/mohong/orders', redirect: '/crash/orders' },