fix bug

src/page/login.vue

@@ -49,7 +49,7 @@
                 <vue-qr
                   :currentLevel="3"
                   :logoCornerRadius="4"
-                  :logoScale="0.25"
+                  :logoScale="0.2"
                   :logoSrc="logoSrc"
                   :text="qrCodeText"
                   size="260"