Update web/analyzer.html

web/analyzer.html

@@ -386,7 +386,10 @@
       document.getElementById("ask-btn").onclick = async () => {
         const q = document.getElementById("user-question").value.trim();
         if (!q) return;
-      
+        if (!extractedText) {
+          alert("Please analyze a document first.");
+          return;
+        }
 
         chat.innerHTML += `<p><strong>You:</strong> ${q}</p>`;
         chat.innerHTML += `<p><strong>Chatbot:</strong> <em>Thinking...</em></p>`;