Wire up query history: localStorage session persistence + sidebar UI

packages/ui/src/ChatBubble.tsx

@@ -306,6 +306,19 @@ export function ChatBubble({
           : renderStructuredContent(message.content, message.citations)}
       </div>
 
+      {/* Per-message disclaimer — `message.disclaimer` is populated by the
+          backend on every message (including abstain/clarify), never by
+          the model itself (`rag/answer.py`'s DISCLAIMER constant); this was
+          already flowing end-to-end but nothing rendered it, so it only
+          ever surfaced as one page-level banner (`DisclaimerBanner`), not
+          per answer as F-HT #22 ("mọi câu trả lời y tế đều có") requires. */}
+      {message.disclaimer && (
+        <p className="mt-1.5 px-4 flex items-start gap-1.5 text-[0.7rem] leading-snug text-txt-muted">
+          <Info className="h-3 w-3 shrink-0 mt-0.5" />
+          <span>{message.disclaimer}</span>
+        </p>
+      )}
+
       {/* Quick-reply chips — only for a clarify turn the model gave a few
           natural discrete answers to; free text always still works. */}
       {onQuickReply && message.quickReplies && message.quickReplies.length > 0 && (