Hide Proceed with Build button when AI needs clarification

- Add pattern matching to detect clarification requests in plan responses
- Hide Proceed with Build button when AI asks questions about missing details
- Button will still show for complete plans that are ready to build

chat/public/builder.js

@@ -2071,13 +2071,27 @@ function renderMessages(session) {
       const isPlanPhase = msg.phase === 'plan';
       const isBuildPhase = msg.phase === 'build';
 
-      if (isOpenRouterMessage && hasReply && (isPlanPhase || isBuildPhase)) {
+      // Check if the plan message is asking for clarification (not ready to build yet)
+      const replyContent = msg.reply || msg.partialOutput || '';
+      const clarificationPatterns = [
+        /To create a complete plan[,.\s\w]*I need clarification/i,
+        /need clarification on a few points/i,
+        /before I can create a plan/i,
+        /I have a few questions/i,
+        /need more (?:details|information|context)/i,
+        /need some clarification/i,
+        /could you clarify/i,
+        /I need to ask/i
+      ];
+      const needsClarification = clarificationPatterns.some(pattern => pattern.test(replyContent));
+
+      if (isOpenRouterMessage && hasReply && (isPlanPhase || isBuildPhase) && !needsClarification) {
         const proceedBtn = document.createElement('button');
         proceedBtn.className = 'primary';
         proceedBtn.style.marginTop = '12px';
         proceedBtn.style.width = '100%';
         proceedBtn.textContent = 'Proceed with Build';
-        proceedBtn.onclick = () => proceedWithBuild(msg.reply || msg.partialOutput);
+        proceedBtn.onclick = () => proceedWithBuild(replyContent);
         assistantBody.appendChild(proceedBtn);
       }