fix(ai): bump roundSinceText cutoff to 30 to prevent panic loops

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

@@ -897,7 +897,7 @@ export async function POST(request: Request) {
           (round >= MAX_TOOL_ROUNDS ||
             !!loopBreakReason ||
             assistantText.trim().length === 0 ||
-            roundsSinceText >= 8 ||
+            roundsSinceText >= 30 ||
             lastToolResultsHadFailure(messages));
 
         if (needsRecovery) {

vibn-frontend/components/vibn-chat/chat-panel.tsx

@@ -788,7 +788,7 @@ export function ChatPanel({
   const [activeThread, setActiveThread] = useState<string | null>(null);
   const [messages, setMessages] = useState<Message[]>([]);
     const [input, setInput] = useState("");
-  const [chatMode, setChatMode] = useState<"collaborate" | "vibe" | "delegate">("collaborate");
+  const [chatMode, setChatMode] = useState<"collaborate" | "vibe" | "delegate">("vibe");
   const [sending, setSending] = useState(false);
   const [showThreads, setShowThreads] = useState(false);
   const [mcpToken, setMcpToken] = useState<string | null>(null);