feat: add tenant membership flow

backend/docs/swagger.yaml

@@ -1015,6 +1015,51 @@ definitions:
     required:
     - duration
     type: object
+  dto.TenantInviteAcceptForm:
+    properties:
+      code:
+        description: Code 邀请码（必填）。
+        type: string
+    type: object
+  dto.TenantInviteCreateForm:
+    properties:
+      expires_at:
+        description: ExpiresAt 过期时间（RFC3339，可选，空值使用默认过期时间）。
+        type: string
+      max_uses:
+        description: MaxUses 最大可使用次数（<=0 默认 1）。
+        type: integer
+      remark:
+        description: Remark 备注说明（可选）。
+        type: string
+    type: object
+  dto.TenantInviteItem:
+    properties:
+      code:
+        description: Code 邀请码。
+        type: string
+      created_at:
+        description: CreatedAt 创建时间（RFC3339）。
+        type: string
+      expires_at:
+        description: ExpiresAt 过期时间（RFC3339，空字符串表示不限制）。
+        type: string
+      id:
+        description: ID 邀请记录ID。
+        type: integer
+      max_uses:
+        description: MaxUses 最大可使用次数。
+        type: integer
+      remark:
+        description: Remark 备注说明。
+        type: string
+      status:
+        description: Status 邀请状态（active/disabled/expired）。
+        type: string
+      used_count:
+        description: UsedCount 已使用次数。
+        type: integer
+    type: object
   dto.TenantItem:
     properties:
       admin_users:
@@ -1074,6 +1119,21 @@ definitions:
         description: UUID 租户UUID。
         type: string
     type: object
+  dto.TenantJoinApplyForm:
+    properties:
+      reason:
+        description: Reason 申请加入原因（可选，空值会使用默认文案）。
+        type: string
+    type: object
+  dto.TenantJoinReviewForm:
+    properties:
+      action:
+        description: Action 审核动作（approve/reject）。
+        type: string
+      reason:
+        description: Reason 审核说明（可选，用于展示驳回原因或备注）。
+        type: string
+    type: object
   dto.TenantOwnerUserLite:
     properties:
       id:
@@ -2662,6 +2722,56 @@ paths:
       summary: Dashboard stats
       tags:
       - CreatorCenter
+  /t/{tenantCode}/v1/creator/members/{id}/review:
+    post:
+      consumes:
+      - application/json
+      description: Approve or reject a tenant join request
+      parameters:
+      - description: Join request ID
+        format: int64
+        in: path
+        name: id
+        required: true
+        type: integer
+      - description: Review form
+        in: body
+        name: form
+        required: true
+        schema:
+          $ref: '#/definitions/dto.TenantJoinReviewForm'
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: Reviewed
+          schema:
+            type: string
+      summary: Review join request
+      tags:
+      - CreatorCenter
+  /t/{tenantCode}/v1/creator/members/invite:
+    post:
+      consumes:
+      - application/json
+      description: Create an invite for tenant members
+      parameters:
+      - description: Invite form
+        in: body
+        name: form
+        required: true
+        schema:
+          $ref: '#/definitions/dto.TenantInviteCreateForm'
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            $ref: '#/definitions/dto.TenantInviteItem'
+      summary: Create member invite
+      tags:
+      - CreatorCenter
   /t/{tenantCode}/v1/creator/orders:
     get:
       consumes:
@@ -3488,6 +3598,83 @@ paths:
       summary: Follow tenant
       tags:
       - TenantPublic
+  /t/{tenantCode}/v1/tenants/{id}/invites/accept:
+    post:
+      consumes:
+      - application/json
+      description: Accept a tenant invite by code
+      parameters:
+      - description: Tenant ID
+        format: int64
+        in: path
+        name: id
+        required: true
+        type: integer
+      - description: Invite form
+        in: body
+        name: form
+        required: true
+        schema:
+          $ref: '#/definitions/dto.TenantInviteAcceptForm'
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: Accepted
+          schema:
+            type: string
+      summary: Accept tenant invite
+      tags:
+      - TenantPublic
+  /t/{tenantCode}/v1/tenants/{id}/join:
+    delete:
+      consumes:
+      - application/json
+      description: Cancel join request for a tenant
+      parameters:
+      - description: Tenant ID
+        format: int64
+        in: path
+        name: id
+        required: true
+        type: integer
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: Canceled
+          schema:
+            type: string
+      summary: Cancel join request
+      tags:
+      - TenantPublic
+    post:
+      consumes:
+      - application/json
+      description: Submit join request for a tenant
+      parameters:
+      - description: Tenant ID
+        format: int64
+        in: path
+        name: id
+        required: true
+        type: integer
+      - description: Join form
+        in: body
+        name: form
+        required: true
+        schema:
+          $ref: '#/definitions/dto.TenantJoinApplyForm'
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: Applied
+          schema:
+            type: string
+      summary: Apply to join tenant
+      tags:
+      - TenantPublic
   /t/{tenantCode}/v1/topics:
     get:
       consumes: