feat(后台): 新增会员档位页并收敛充值商品页

- 充值商品页改为纯泥点商品：去掉会员档位与 membership_* 字段，固定 kind=points，首充赠送默认 0
- 新增会员档位页：按档位枚举改月价 / 年价 / 每期泥点 / 模型权限 / 并发上限 / 可购买 / 排序，rank 只读
- adminApiTypes 用档位枚举替换旧 tier 类型并补会员档位请求响应类型，客户端补 listProfileMembershipPlans / upsertProfileMembershipPlan
- 注册 #membership-plans 路由与侧边栏图标

Co-authored-by: Junie <junie@jetbrains.com>

apps/admin-web/src/api/adminApiClient.ts

@@ -70,6 +70,7 @@ import type {
   AdminUpsertEditorShowcaseCampaignRequest,
   AdminUpsertFeatureGateConfigRequest,
   AdminUpsertProfileInviteCodeRequest,
+  AdminUpsertProfileMembershipPlanRequest,
   AdminUpsertProfileRechargeProductRequest,
   AdminUpsertProfileRedeemCodeRequest,
   AdminUpsertProfileTaskConfigRequest,
@@ -86,6 +87,8 @@ import type {
   EditorGenerationPricingConfigPayload,
   ProfileInviteCodeAdminListResponse,
   ProfileInviteCodeAdminResponse,
+  ProfileMembershipPlanAdminListResponse,
+  ProfileMembershipPlanAdminResponse,
   ProfileRechargeProductConfigAdminListResponse,
   ProfileRechargeProductConfigAdminResponse,
   ProfileRedeemCodeAdminListResponse,
@@ -791,6 +794,27 @@ export function upsertProfileRechargeProduct(
   );
 }
 
+export function listProfileMembershipPlans(token: string) {
+  return request<ProfileMembershipPlanAdminListResponse>(
+    '/admin/api/profile/membership-plans',
+    { token },
+  );
+}
+
+export function upsertProfileMembershipPlan(
+  token: string,
+  payload: AdminUpsertProfileMembershipPlanRequest,
+) {
+  return request<ProfileMembershipPlanAdminResponse>(
+    '/admin/api/profile/membership-plans',
+    {
+      method: 'POST',
+      token,
+      body: payload,
+    },
+  );
+}
+
 export function listAdminRechargeOrders(
   token: string,
   query: AdminRechargeOrderListQuery = {},