fix(tui/panic): restore terminal and exit on any thread panic to prevent broken raw mode/alt-screen state on Windows and heavy-load errors\n\nThis ensures we don’t leave bracketed focus/mouse reporting enabled or raw mode active when a background thread panics (e.g., during rate limits or multi-agent heavy output).\n\nCloses #80

codex-rs/tui/src/tui.rs

@@ -177,10 +177,25 @@ fn query_terminal_info() -> TerminalInfo {
 }
 
 fn set_panic_hook() {
-    let hook = std::panic::take_hook();
+    // Chain to any previously installed hook so users still get rich reports.
+    let prev = std::panic::take_hook();
     std::panic::set_hook(Box::new(move |panic_info| {
-        let _ = restore(); // ignore any errors as we are already failing
-        hook(panic_info);
+        // Always attempt to restore the terminal state before printing the panic.
+        // This is crucial on Windows and when background threads panic — otherwise
+        // raw mode, mouse/focus reporting, and the alt screen can be left enabled,
+        // causing sequences like "[A", "[B", or "[I" to appear and making Ctrl+C
+        // ineffective. Ignore any restore error as we're already failing.
+        let _ = restore();
+
+        // Delegate to the previous hook (color-eyre or default) to render details.
+        prev(panic_info);
+
+        // Ensure the process terminates. Without exiting here, a panic in a
+        // background thread (e.g., streaming/agent worker) would leave the main
+        // UI thread running after we've torn down the terminal, which manifests
+        // as the "CLI bugs out" behavior described in issue #80.
+        // Exiting avoids that half‑alive state and returns control to the shell.
+        std::process::exit(1);
     }));
 }