feat(tui): update fullscreen config for model router

src/frontends/tui/index.ts

@@ -2,7 +2,7 @@ export {
   MinimalTui,
   formatPrompt,
   parseCommand,
-  type TuiCommand,
+  type Command,
   type MinimalTuiConfig,
 } from './minimal.js';
 
@@ -11,4 +11,7 @@ export {
   type FullscreenTuiConfig,
 } from './fullscreen.js';
 
+export { renderMarkdown } from './markdown.js';
+export { parseCommand as parseCommandUtil, getHelpText, resolveModelAlias } from './commands.js';
+
 export { App, StatusBar, MessageList, InputBar } from './components/index.js';