fix(tui): enable help key shortcut '?' in input mode

Fixes bounty issue #1535

The '?' key (Shift+/) was previously consumed by the input widget as text input, preventing the global Help action from triggering. This change prioritizes the Help action check before text input processing, ensuring the help overlay can be accessed even when the input field is focused.

Author: factorydroid

cortex-tui/src/runner/event_loop.rs

@@ -1357,6 +1357,16 @@ impl EventLoop {
                 let context = self.get_action_context();
                 let action = self.action_mapper.get_action(key_event, context);
 
+                // Handle global Help action explicitly, even in input context
+                // This ensures '?' triggers help even when typing, but only if it's Shift+/ (?)
+                // and not just typing text. Since '?' is mapped to Help action, we prioritize it
+                // unless it's being handled by autocomplete or other specific logic.
+                if action == KeyAction::Help {
+                    self.handle_action(action).await?;
+                    self.render(terminal)?;
+                    return Ok(());
+                }
+
                 // Check if autocomplete is visible and handle its navigation
                 if self.app_state.autocomplete.visible {
                     match key_event.code {