feat(auth): 优化PC与移动端登录注册界面并支持邀请码锁定绑定

- 重构 PC 端 LoginView.vue 与移动端 MobileRegisterView.vue，统一契合平台金橙色主体色
- 识别邀请链接并自动填入邀请码，锁定输入框为只读并展示「已绑定邀请码」专属徽章，防止篡改
- 短链 /i/:code 与 /m/i/:code 统一重定向至登录注册页，移除冗余独立落地页
- PC 端页脚完全对齐主站并固定沉底，左侧定制官方品质、安全上号、资金担保平台核心卖点
- 验证方式：npm run check（Prettier + ESLint + vue-tsc）全数通过

frontend/src/router/accountRoutes.ts

@@ -5,6 +5,7 @@ export const accountRoutes: RouteRecordRaw[] = [
     path: '/login',
     name: 'login',
     component: () => import('@/features/auth/views/LoginView.vue'),
+    meta: { layout: 'blank' },
   },
   {
     path: '/orders/create',

frontend/src/router/mobileRoutes.ts

@@ -43,6 +43,16 @@ export const mobileRoutes: RouteRecordRaw[] = [
     component: () => import('@/features/auth/views/MobileRegisterView.vue'),
     meta: { layout: 'blank' },
   },
+  {
+    path: '/m/i/:code',
+    name: 'mobile-invite-register',
+    redirect: to => ({
+      path: '/m/register',
+      query: {
+        invite_code: String(to.params.code || ''),
+      },
+    }),
+  },
   {
     path: '/m/messages',
     name: 'mobile-messages',

frontend/src/router/publicRoutes.ts

@@ -39,12 +39,17 @@ export const publicRoutes: RouteRecordRaw[] = [
     name: 'crash-detail',
     component: () => import('@/features/mohong/views/MohongDetailView.vue'),
   },
-  // 专属邀请注册落地页
+  // 专属邀请短链重定向
   {
     path: '/i/:code',
     name: 'invite-register',
-    component: () => import('@/features/invitation/views/InviteRegisterView.vue'),
-    meta: { layout: 'blank' },
+    redirect: to => ({
+      path: '/login',
+      query: {
+        tab: 'register',
+        invite_code: String(to.params.code || ''),
+      },
+    }),
   },
   // 旧路径兼容
   { path: '/mohong', redirect: '/crash' },