update

src/main/pty-service.ts

@@ -30,11 +30,21 @@ let seq = 0
  * `npm_config_prefix` (e.g. "/opt/homebrew") into the child shell, which makes
  * nvm refuse to load ("nvm is not compatible with the npm_config_prefix
  * environment variable"). Strip it so the user's shell init runs cleanly.
+ *
+ * A macOS app launched from Spotlight/Finder (launchd GUI context) inherits NO
+ * `LANG`/`LC_*`, so the child shell falls back to the `C`/POSIX locale — not
+ * UTF-8. Anything multibyte the shell or `claude` emits then renders as high-byte
+ * mojibake in xterm. Launching from a terminal (`npm run dev`) inherits the
+ * terminal's UTF-8 locale, which is why dev looks fine and the packaged app does
+ * not. Default a UTF-8 locale when none is set so both paths match.
  */
 function ptyEnv(): { [key: string]: string } {
   const env = { ...process.env } as { [key: string]: string }
   delete env.npm_config_prefix
   delete env.npm_config_globalconfig
+  if (process.platform !== 'win32' && !env.LC_ALL && !env.LC_CTYPE && !env.LANG) {
+    env.LANG = 'en_US.UTF-8'
+  }
   return env
 }