add zoom-in indication to avatar

src/components/user_card/user_card.vue

@@ -16,6 +16,9 @@
               :better-shadow="betterShadow"
               :user="user"
             />
+            <div class="user-info-avatar-link-overlay">
+              <i class="button-icon icon-zoom-in" />
+            </div>
           </a>
           <router-link
             v-else
@@ -364,6 +367,7 @@
   .container {
     padding: 16px 0 6px;
     display: flex;
+    align-items: flex-start;
     max-height: 56px;
 
     .avatar {
@@ -386,7 +390,32 @@
   }
 
   &-avatar-link {
+    position: relative;
     cursor: pointer;
+
+    &-overlay {
+      position: absolute;
+      left: 0;
+      top: 0;
+      right: 0;
+      bottom: 0;
+      background-color: rgba(0, 0, 0, 0.3);
+      display: flex;
+      justify-content: center;
+      align-items: center;
+      border-radius: $fallback--avatarRadius;
+      border-radius: var(--avatarRadius, $fallback--avatarRadius);
+      opacity: 0;
+      transition: opacity .2s ease;
+
+      i {
+        color: #FFF;
+      }
+    }
+
+    &:hover &-overlay {
+      opacity: 1;
+    }
   }
 
   .usersettings {