feat: improved SVG output UX (#8765)

web/app/components/base/chat/chat/answer/index.tsx

@@ -85,6 +85,19 @@ const Answer: FC<AnswerProps> = ({
       getContentWidth()
   }, [responding])
 
+  // Recalculate contentWidth when content changes (e.g., SVG preview/source toggle)
+  useEffect(() => {
+    if (!containerRef.current)
+      return
+    const resizeObserver = new ResizeObserver(() => {
+      getContentWidth()
+    })
+    resizeObserver.observe(containerRef.current)
+    return () => {
+      resizeObserver.disconnect()
+    }
+  }, [])
+
   return (
     <div className='flex mb-2 last:mb-0'>
       <div className='shrink-0 relative w-10 h-10'>