fix(tui): make ? work again (#4362)

Revert #4330 #4316

Author: fouad-openai

codex-rs/tui/src/bottom_pane/chat_composer.rs

@@ -4,6 +4,7 @@ use std::path::PathBuf;
 use crate::app_event_sender::AppEventSender;
 use crate::tui::FrameRequester;
 use bottom_pane_view::BottomPaneView;
+use codex_core::protocol::TokenUsageInfo;
 use codex_file_search::FileMatch;
 use crossterm::event::KeyCode;
 use crossterm::event::KeyEvent;
@@ -376,6 +377,13 @@ impl BottomPane {
         !self.is_task_running && self.view_stack.is_empty() && !self.composer.popup_active()
     }
 
+    /// Update the *context-window remaining* indicator in the composer. This
+    /// is forwarded directly to the underlying `ChatComposer`.
+    pub(crate) fn set_token_usage(&mut self, token_info: Option<TokenUsageInfo>) {
+        self.composer.set_token_usage(token_info);
+        self.request_redraw();
+    }
+
     pub(crate) fn show_view(&mut self, view: Box<dyn BottomPaneView>) {
         self.push_view(view);
     }

codex-rs/tui/src/bottom_pane/footer.rs

@@ -11,4 +11,4 @@ expression: terminal.backend()
 "                                                                                                    "
 "                                                                                                    "
 "                                                                                                    "
-"  ? for shortcuts                                                                                   "
+"  ⏎ send   ⌃J newline   ⌃T transcript   ⌃C quit                                                     "

codex-rs/tui/src/bottom_pane/mod.rs

@@ -11,4 +11,4 @@ expression: terminal.backend()
 "                                                                                                    "
 "                                                                                                    "
 "                                                                                                    "
-"  ? for shortcuts                                                                                   "
+"  ⏎ send   ⌃J newline   ⌃T transcript   ⌃C quit                                                     "