diff --git a/src/tui.ts b/src/tui.ts
index 67540d0..94491ff 100644
--- a/src/tui.ts
+++ b/src/tui.ts
@@ -19,6 +19,8 @@ function createModelRouter(config: Config): ModelRouter {
 
   const defaultClient = new AnthropicClient({
     model: models.default.model,
+    apiKey: models.default.api_key,
+    authToken: models.default.auth_token,
   });
 
   let fastClient;
@@ -26,11 +28,19 @@ function createModelRouter(config: Config): ModelRouter {
   let localClient;
 
   if (models.fast) {
-    fastClient = new AnthropicClient({ model: models.fast.model });
+    fastClient = new AnthropicClient({
+      model: models.fast.model,
+      apiKey: models.fast.api_key,
+      authToken: models.fast.auth_token,
+    });
   }
 
   if (models.complex) {
-    complexClient = new AnthropicClient({ model: models.complex.model });
+    complexClient = new AnthropicClient({
+      model: models.complex.model,
+      apiKey: models.complex.api_key,
+      authToken: models.complex.auth_token,
+    });
   }
 
   if (models.local) {
@@ -100,15 +110,19 @@ async function main() {
     await startFullscreenTui({
       session,
       modelClient: modelRouter,
+      modelRouter,
       systemPrompt: SYSTEM_PROMPT,
       model: config.models.default.model,
       onExit: cleanup,
     });
   } else {
     // Start minimal readline UI
+    let switchingToFullscreen = false;
+
     const tui = new MinimalTui({
       session,
       modelClient: modelRouter,
+      modelRouter,
       systemPrompt: SYSTEM_PROMPT,
       onTransfer: (target) => {
         if (target === 'telegram') {
@@ -119,25 +133,26 @@ async function main() {
           console.log(`Unknown transfer target: ${target}\n`);
         }
       },
-      onFullscreen: async () => {
-        tui.stop();
-        console.clear();
-        await startFullscreenTui({
-          session,
-          modelClient: modelRouter,
-          systemPrompt: SYSTEM_PROMPT,
-          model: config.models.default.model,
-          onExit: () => {
-            // Return to minimal mode would require re-init
-            // For now, just exit
-            cleanup();
-            process.exit(0);
-          },
-        });
+      onFullscreen: () => {
+        switchingToFullscreen = true;
+        tui.stop(true);  // Preserve stdin for fullscreen mode
       },
     });
 
     await tui.start();
+
+    if (switchingToFullscreen) {
+      console.clear();
+      await startFullscreenTui({
+        session,
+        modelClient: modelRouter,
+        modelRouter,
+        systemPrompt: SYSTEM_PROMPT,
+        model: config.models.default.model,
+        onExit: cleanup,
+      });
+      return;
+    }
   }
 
   cleanup();