fix(tui): require Enter to open /connect provider picker

Typing exactly '/connect' previously auto-opened the interactive
provider login picker, conflicting with the documented behavior where
'/connect' (no provider) only opens the picker on submit.

Drop the keystroke-triggered show_interactive_login() call in
handle_text_input; the submit path (handle_auth_command) still
opens the picker when the user presses Enter on bare '/connect'.

Author: quangdang46

crates/jcode-tui/src/tui/app/input.rs

@@ -782,14 +782,6 @@ pub(super) fn handle_text_input(app: &mut App, text: &str) -> bool {
     }
 
     insert_input_text(app, text);
-    // Convenience: typing '/connect' (exactly 8 chars) auto-opens the
-    // interactive provider login picker so the user does not have to
-    // press Enter to summon it. The input is left untouched so the
-    // user can keep typing a provider name to refine ('/connect
-    // openai' will start the openai flow on Enter).
-    if app.input == "/connect" {
-        app.show_interactive_login();
-    }
     true
 }