style: adjust bot-embedded-image max-width and remove hover effect for improved layout

Author: Soulter

dashboard/src/components/chat/MessageList.vue

@@ -549,7 +549,7 @@ export default {
 }
 
 .bot-embedded-image {
-    max-width: 80%;
+    max-width: 40%;
     width: auto;
     height: auto;
     border-radius: 8px;
@@ -558,10 +558,6 @@ export default {
     transition: transform 0.2s ease;
 }
 
-.bot-embedded-image:hover {
-    transform: scale(1.02);
-}
-
 .embedded-audio {
     width: 300px;
     margin-top: 8px;