Fix first startup on macOS 2

src/main.rs

@@ -12,6 +12,8 @@ mod updater;
 
 use std::io;
 use anyhow::Result;
+#[cfg(unix)]
+use libc;
 use crossterm::{
     event::{DisableMouseCapture, EnableMouseCapture},
     execute,
@@ -29,6 +31,18 @@ async fn main() -> Result<()> {
         config::Config::create_with_endpoint(&url, &name)?
     };
 
+    // Before initializing the TUI, ensure our process group is the terminal's
+    // foreground group. When launched from a non-interactive install script on
+    // macOS, the parent shell may not have granted terminal ownership, causing
+    // crossterm's kqueue-based input reader to fail silently.
+    #[cfg(unix)]
+    {
+        use std::os::unix::io::AsRawFd;
+        if let Ok(tty) = std::fs::File::open("/dev/tty") {
+            unsafe { libc::tcsetpgrp(tty.as_raw_fd(), libc::getpgrp()); }
+        }
+    }
+
     enable_raw_mode()?;
     let mut stdout = io::stdout();
     execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;