feat: 手动充值、邀请码注册与后台管理增强

新增玩家手动充值全流程（收款方式配置、充值下单/审核、钱包上分），
支持邀请码注册、邀请历史与专属返水率；完善后台代理/玩家管理与响应式操作栏，
并补充前台注册、充值页及多语言错误码。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/prisma/migrations/20260611140000_user_invite_sponsor/migration.sql

@@ -0,0 +1,8 @@
+-- AlterTable
+ALTER TABLE "users" ADD COLUMN "invite_sponsor_id" BIGINT;
+
+-- CreateIndex
+CREATE INDEX "users_invite_sponsor_id_idx" ON "users"("invite_sponsor_id");
+
+-- AddForeignKey
+ALTER TABLE "users" ADD CONSTRAINT "users_invite_sponsor_id_fkey" FOREIGN KEY ("invite_sponsor_id") REFERENCES "users"("id") ON DELETE SET NULL ON UPDATE CASCADE;