feat(cli): add login command and authenticated TUI sessions (#114)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

packages/cli/src/tui/app.tsx

@@ -12,9 +12,14 @@ interface Message {
 interface TuiAppProps {
   gatewayUrl: string;
   conversationId?: string;
+  sessionCookie?: string;
 }
 
-export function TuiApp({ gatewayUrl, conversationId: initialConversationId }: TuiAppProps) {
+export function TuiApp({
+  gatewayUrl,
+  conversationId: initialConversationId,
+  sessionCookie,
+}: TuiAppProps) {
   const { exit } = useApp();
   const [messages, setMessages] = useState<Message[]>([]);
   const [input, setInput] = useState('');
@@ -27,6 +32,7 @@ export function TuiApp({ gatewayUrl, conversationId: initialConversationId }: Tu
   useEffect(() => {
     const socket = io(`${gatewayUrl}/chat`, {
       transports: ['websocket'],
+      extraHeaders: sessionCookie ? { Cookie: sessionCookie } : undefined,
     });
 
     socketRef.current = socket;