feat(distribution): 重构分销后台为SaaS商户工作台并全面商业化优化

- 商品货架 (Accounts.tsx): 支持期望售价/固定金额/百分比多模式实时联动加价与批量调价，高亮100%独享溢价
- 订单中心 (Orders.tsx): 透传账号游戏租客信息，新增收益对账抽屉透明拆解底价、手续费、分成与自主溢价
- 结算与规则 (Settlements.tsx & Rules.tsx): 纠正角色倒错，商户视角展现周期对账单与分成合作政策
- 店铺装修 (SiteSettings.tsx): 废除手写JSON，提供横幅/公告/页脚可视化列表编辑器与前台实时模拟器
- 数据大盘 (Dashboard.tsx): 对齐最新订单字段，大字展示分销商净收益
- 后端数据层 (dto.go, repository.go, handler.go): 聚合计算分销商订单收益，支持商品与租客搜索

distribution-admin/src/api.ts

@@ -149,9 +149,12 @@ export interface DistributionOrder {
   order_no: string
   site_id: number
   status: string
+  handoff_status?: string
   refund_status: string
   settlement_status: string
   distribution_mode: string
+  gross_paid_amount_cent?: number
+  refund_amount_cent?: number
   net_paid_amount_cent: number
   payment_fee_cent: number
   service_fee_cent: number
@@ -160,6 +163,27 @@ export interface DistributionOrder {
   split_base_amount_cent: number
   rounding_adjustment_cent: number
   created_at: string
+
+  // 商品与租客字段
+  listing_no?: string
+  title?: string
+  game_name?: string
+  server_region?: string
+  login_platform?: string
+  rent_duration_hours?: number
+  rented_at?: string
+  renter_phone?: string
+  renter_nickname?: string
+  owner_rent_amount_cent?: number
+  base_price_cent?: number
+  shelf_markup_cent?: number
+  deposit_amount_cent?: number
+
+  // 商户本站收益拆解字段
+  distributor_earning_cent?: number
+  distributor_role?: string
+  distributor_markup_cent?: number
+  distributor_split_cent?: number
 }
 
 export interface OrderPage {