feat(ECR-015): RedemptionCode 兑换码并 Closed

批次生成/作废、C 端兑码延长会员；admin-h5 /codes。
Loop continuous。Next：ECR-016 UserIntelligence。

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

proto/openapi.yaml

@@ -296,6 +296,49 @@ paths:
         '403':
           description: Forbidden
 
+  /api/v1/admin/redemption-batches:
+    get:
+      tags: [admin]
+      summary: List redemption batches
+      responses: { '200': { description: OK } }
+    post:
+      tags: [admin]
+      summary: Create redemption batch
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              type: object
+              required: [label, plan_code, quantity]
+              properties:
+                label: { type: string }
+                plan_code: { type: string }
+                quantity: { type: integer, minimum: 1, maximum: 100 }
+      responses: { '200': { description: OK } }
+
+  /api/v1/admin/redemption-batches/{id}/codes:
+    get:
+      tags: [admin]
+      summary: List codes in batch
+      parameters:
+        - in: path
+          name: id
+          required: true
+          schema: { type: string, format: uuid }
+      responses: { '200': { description: OK } }
+
+  /api/v1/admin/redemption-codes/{id}/disable:
+    post:
+      tags: [admin]
+      summary: Disable unused code
+      parameters:
+        - in: path
+          name: id
+          required: true
+          schema: { type: string, format: uuid }
+      responses: { '200': { description: OK } }
+
   /api/v1/admin/orders:
     get:
       tags: [admin]
@@ -1010,6 +1053,27 @@ paths:
               schema:
                 $ref: '#/components/schemas/EnvelopeMembershipMe'
 
+  /api/v1/membership/redeem:
+    post:
+      tags: [commerce]
+      summary: 兑换会员码
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              type: object
+              required: [code]
+              properties:
+                code: { type: string }
+      responses:
+        '200':
+          description: OK
+        '400':
+          description: Invalid or used code
+        '401':
+          description: Unauthorized
+
   /api/v1/orders:
     post:
       tags: [commerce]