feat(ECR-018): Entitlement 用户权益只读并 Closed

聚合 GET /admin/users/:id/entitlements（Membership∪DeepAccess∪问答额度）与 admin-h5 权益 Tab；无 migration / 无真支付。

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

.ai/product/feature-spec/README.md

@@ -27,6 +27,7 @@
 | [ops-redemption-code.md](ops-redemption-code.md) | 兑换码 RedemptionCode | §7 | `admin-h5` `/codes` · `POST /membership/redeem` | Ops-D · **ECR-015 Closed** |
 | [ops-user-intelligence.md](ops-user-intelligence.md) | 用户洞察 UserIntelligence | §7 | `admin-h5` 用户详情「洞察」· `GET /admin/users/:id/insight` | Ops-D · **ECR-016 Closed** |
 | [ops-ask-operations.md](ops-ask-operations.md) | 问答运营 AskOperations | §7 | `admin-h5` `/ask` · `GET /admin/ask/threads*` | Ops-D · **ECR-017 Closed** |
+| [ops-entitlement.md](ops-entitlement.md) | 用户权益 Entitlement | §7 | `admin-h5` 用户详情「权益」· `GET /admin/users/:id/entitlements` | Ops-D · **ECR-018 Closed** |
 
 新功能：复制 `_TEMPLATE.md` → 填满 → 在本表登记 → 再编码。