fix: <Text> encoding non-ascii characters in Bun (#760)

src/auth/setup-ui.tsx

@@ -3,16 +3,14 @@
  */
 
 import { hostname } from "node:os";
-import { Box, Text, useApp, useInput } from "ink";
+import { Box, useApp, useInput } from "ink";
 import { useState } from "react";
 import { AnimatedLogo } from "../cli/components/AnimatedLogo";
 import { colors } from "../cli/components/colors";
+import { Text } from "../cli/components/Text";
 import { settingsManager } from "../settings-manager";
 import { pollForToken, requestDeviceCode } from "./oauth";
 
-const upArrow = String.fromCharCode(0x2191);
-const downArrow = String.fromCharCode(0x2193);
-
 type SetupMode = "menu" | "device-code" | "auth-code" | "self-host" | "done";
 
 interface SetupUIProps {
@@ -189,9 +187,7 @@ export function SetupUI({ onComplete }: SetupUIProps) {
         </Text>
       </Box>
       <Text> </Text>
-      <Text dimColor>
-        Use {upArrow}/{downArrow} to navigate, Enter to select
-      </Text>
+      <Text dimColor>Use ↑/↓ to navigate, Enter to select</Text>
     </Box>
   );
 }