post:
  operationId: generateQRCodeLogin
  summary: Generate Google Authenticator QR code
  tags: [staffManagement]
  requestBody:
    required: true
    content:
      application/json:
        schema:
          $ref: "../../components.yaml#/components/schemas/GenerateGAQRCodeRequest"
        example:
          user_id: "6643f1a2b4c5d60012e34abc"
          account_name: "admin@example.com"
  responses:
    "200":
      description: QR code result — DTO returned directly
      content:
        application/json:
          schema:
            $ref: "../../components.yaml#/components/schemas/GenerateGAQRCodeResponse"
          example:
            qr_png_b64: "iVBORw0KGgoAAAANSUhEUgAA..."
            secret_id: "secret_xyz"
    "400":
      $ref: "../../components.yaml#/components/responses/Failure"