Ensure thinking payloads fall through to standard prose formatting

vibn-frontend/app/api/chat/route.ts

@@ -1744,7 +1744,10 @@ export async function POST(request: Request) {
           } catch {
             const fallback = buildHealthStatus({
               loopBreakReason,
-              hitRoundCap: maxToolRounds > 0 && round >= maxToolRounds,
+              // If the loop was forcibly aborted by the user typing a new message mid-flight,
+              // we don't want to falsely claim we hit the tool-round cap. We only hit the cap
+              // if aborted is false.
+              hitRoundCap: !aborted && maxToolRounds > 0 && round >= maxToolRounds,
               lastError: extractLastToolFailure(messages),
               toolCount: assistantToolCalls.length,
             });