i try to chat with it but the input not submited

index.html

@@ -258,22 +258,29 @@
             function scrollToBottom() {
                 chatContainer.scrollTop = chatContainer.scrollHeight;
             }
-
             // Handle form submission
             chatForm.addEventListener('submit', async (e) => {
                 e.preventDefault();
                 
                 const message = userInput.value.trim();
-                if (!message) return;
-                
-                // Add user message
+                if (!message) {
+            userInput.focus();
+
+            // Ensure form submission works on Enter key
+            userInput.addEventListener('keydown', (e) => {
+                if (e.key === 'Enter' && !e.shiftKey) {
+                    e.preventDefault();
+                    chatForm.dispatchEvent(new Event('submit'));
+                }
+            });
+return;
+                }
+// Add user message
                 addUserMessage(message);
                 userInput.value = '';
                 
                 // Add typing indicator
                 const typingElement = addBotMessage('', true);
-                
-                try {
                     try {
                         // Get response from Gemini
                         const response = await gemini.ask(message, conversationId);
@@ -297,7 +304,6 @@
                         // Show user-friendly error message
                         addBotMessage("I'm having trouble connecting right now. Please try again later.");
                         console.error('Chat error:', error);
-                    }
 } catch (error) {
                     // Remove typing indicator
                     chatContainer.removeChild(typingElement);