fix(app): user message text wrap

packages/ui/src/components/message-part.css

@@ -77,7 +77,8 @@
 
   [data-slot="user-message-text"] {
     white-space: pre-wrap;
-    overflow-x: auto;
+    word-break: break-all;
+    overflow: hidden;
     background: var(--surface-base);
     padding: 8px 12px;
     border-radius: 4px;