fixed some issues related to user avatar

src/components/attachment/attachment.vue

@@ -60,6 +60,7 @@
       @click="openModal"
     >
       <StillImage
+        class="image"
         :referrerpolicy="referrerpolicy"
         :mimetype="attachment.mimetype"
         :src="attachment.large_thumb_url || attachment.url"
@@ -281,8 +282,11 @@
   }
 
   .image-attachment {
-    width: 100%;
-    height: 100%;
+    &,
+    & .image {
+      width: 100%;
+      height: 100%;
+    }
 
     &.hidden {
       display: none;

src/components/chat_list_item/chat_list_item.scss

@@ -72,7 +72,7 @@
     }
   }
 
-  .avatar.still-image {
+  .Avatar {
     border-radius: $fallback--avatarAltRadius;
     border-radius: var(--avatarAltRadius, $fallback--avatarAltRadius);
   }

src/components/chat_title/chat_title.vue

@@ -51,7 +51,7 @@
     }
   }
 
-  .still-image.avatar {
+  .Avatar {
     width: 23px;
     height: 23px;
     margin-right: 0.5em;

src/components/status/status.scss

@@ -6,7 +6,7 @@ $status-margin: 0.75em;
 .Status {
   min-width: 0;
 
-  &:hover .avatar {
+  &:hover {
     --still-image-img: visible;
     --still-image-canvas: hidden;
   }

src/components/still-image/still-image.vue

@@ -30,8 +30,6 @@
   position: relative;
   line-height: 0;
   overflow: hidden;
-  width: 100%;
-  height: 100%;
   display: flex;
   align-items: center;
 
@@ -68,6 +66,7 @@
       border-radius: $fallback--tooltipRadius;
       border-radius: var(--tooltipRadius, $fallback--tooltipRadius);
       z-index: 2;
+      visibility: var(--still-image-label-visibility, visible);
     }
 
     &:hover canvas {

src/components/user_avatar/user_avatar.vue

 <template>
   <StillImage
-    class="avatar"
+    class="Avatar"
     :alt="user.screen_name"
     :title="user.screen_name"
     :src="imgSrc(user.profile_image_url_original)"
@@ -13,7 +13,9 @@
 <style lang="scss">
 @import '../../_variables.scss';
 
-.avatar.still-image {
+.Avatar {
+  --still-image-label-visibility: hidden;
+
   width: 48px;
   height: 48px;
   box-shadow: var(--avatarStatusShadow);

src/components/user_card/user_card.vue

@@ -364,13 +364,9 @@
     }
   }
 
-  &:hover .animated.avatar {
-    canvas {
-      display: none;
-    }
-    img {
-      visibility: visible;
-    }
+  &:hover .avatar {
+    --still-image-img: visible;
+    --still-image-canvas: hidden;
   }
 
   &-avatar-link {