tenant: add member management APIs

backend/docs/swagger.yaml

@@ -185,6 +185,19 @@ definitions:
           退款原因：建议必填（由业务侧校验）；用于审计与追责。
         type: string
     type: object
+  dto.AdminTenantUserJoinResponse:
+    properties:
+      tenant_user:
+        allOf:
+        - $ref: '#/definitions/models.TenantUser'
+        description: TenantUser 租户成员关系记录。
+    type: object
+  dto.AdminTenantUserRoleUpdateForm:
+    properties:
+      role:
+        description: Role 角色：member/tenant_admin。
+        type: string
+    type: object
   dto.AdminTopupForm:
     properties:
       amount:
@@ -1511,6 +1524,102 @@ paths:
       summary: 订单退款（租户管理）
       tags:
       - Tenant
+  /t/{tenantCode}/v1/admin/users:
+    get:
+      consumes:
+      - application/json
+      parameters:
+      - description: Tenant Code
+        in: path
+        name: tenantCode
+        required: true
+        type: string
+      - description: Limit is page size; only values in {10,20,50,100} are accepted
+          (otherwise defaults to 10).
+        in: query
+        name: limit
+        type: integer
+      - description: Page is 1-based page index; values <= 0 are normalized to 1.
+        in: query
+        name: page
+        type: integer
+      - description: UserID 按用户ID过滤（可选）。
+        in: query
+        name: user_id
+        type: integer
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            allOf:
+            - $ref: '#/definitions/requests.Pager'
+            - properties:
+                items:
+                  $ref: '#/definitions/models.TenantUser'
+              type: object
+      summary: 成员列表（租户管理）
+      tags:
+      - Tenant
+  /t/{tenantCode}/v1/admin/users/{userID}/join:
+    post:
+      consumes:
+      - application/json
+      parameters:
+      - description: Tenant Code
+        in: path
+        name: tenantCode
+        required: true
+        type: string
+      - description: UserID
+        format: int64
+        in: path
+        name: userID
+        required: true
+        type: integer
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            $ref: '#/definitions/dto.AdminTenantUserJoinResponse'
+      summary: 添加租户成员（租户管理）
+      tags:
+      - Tenant
+  /t/{tenantCode}/v1/admin/users/{userID}/role:
+    patch:
+      consumes:
+      - application/json
+      parameters:
+      - description: Tenant Code
+        in: path
+        name: tenantCode
+        required: true
+        type: string
+      - description: UserID
+        format: int64
+        in: path
+        name: userID
+        required: true
+        type: integer
+      - description: Form
+        in: body
+        name: form
+        required: true
+        schema:
+          $ref: '#/definitions/dto.AdminTenantUserRoleUpdateForm'
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            $ref: '#/definitions/dto.AdminTenantUserJoinResponse'
+      summary: 设置成员角色（租户管理）
+      tags:
+      - Tenant
   /t/{tenantCode}/v1/admin/users/{userID}/topup:
     post:
       consumes: