server auth stuff, prooompt engineering

src/app/chat/_components/ChatInterface.tsx

@@ -59,7 +59,7 @@ export default function ChatInterface({ sessionId }: ChatInterfaceProps) {
 	})
 	const handleSend = () => {
 		const text = input.trim()
-		if (!text || status != 'ready') return
+		if (!text || status != 'ready' || sessionId == undefined) return
 		setInput('')
 		sendMessage({ text })
 		addMessage({
@@ -140,7 +140,7 @@ export default function ChatInterface({ sessionId }: ChatInterfaceProps) {
 				<div className='flex flex-col gap-2'>
 					<Button
 						onClick={handleSend}
-						disabled={status != "ready" || !input.trim()}
+						disabled={status != "ready" || !input.trim() || sessionId == undefined}
 					>
 						Send
 					</Button>