fix: frontend for <think> tags conflicting with original <details> tags (#14039)

web/app/components/base/markdown-blocks/think-block.tsx

   const displayContent = removeEndThink(children)
   const { t } = useTranslation()
 
+  if (!(props['data-think'] ?? false))
+    return (<details {...props}>{children}</details>)
+
   return (
     <details {...(!isComplete && { open: true })} className="group">
       <summary className="text-gray-500 font-bold list-none pl-2 flex items-center cursor-pointer select-none whitespace-nowrap">

web/app/components/base/markdown.tsx

 }
 
 const preprocessThinkTag = (content: string) => {
-  if (!(content.trim().startsWith('<think>\n') || content.trim().startsWith('<details style=')))
-    return content
-
   return flow([
-    (str: string) => str.replaceAll('<think>\n', '<details>\n'),
-    (str: string) => str.replaceAll('\n</think>', '\n[ENDTHINKFLAG]</details>'),
-    (str: string) => str.replaceAll('\n</details>', '\n[ENDTHINKFLAG]</details>'),
+    (str: string) => str.replace('<think>\n', '<details data-think=true>\n'),
+    (str: string) => str.replace('\n</think>', '\n[ENDTHINKFLAG]</details>'),
   ])(content)
 }