Add support for debug logging of keystrokes to investigate #6227 (#6844)

Co-authored-by: Arya Gummadi <aryagummadi@google.com>

packages/cli/src/ui/App.tsx

@@ -119,6 +119,7 @@ export const AppWrapper = (props: AppProps) => {
     <KeypressProvider
       kittyProtocolEnabled={kittyProtocolStatus.enabled}
       config={props.config}
+      debugKeystrokeLogging={props.settings.merged.debugKeystrokeLogging}
     >
       <SessionStatsProvider>
         <VimModeProvider settings={props.settings}>
@@ -664,6 +665,11 @@ const App = ({ config, settings, startupWarnings = [], version }: AppProps) => {
 
   const handleGlobalKeypress = useCallback(
     (key: Key) => {
+      // Debug log keystrokes if enabled
+      if (settings.merged.debugKeystrokeLogging) {
+        console.log('[DEBUG] Keystroke:', JSON.stringify(key));
+      }
+
       let enteringConstrainHeightMode = false;
       if (!constrainHeight) {
         enteringConstrainHeightMode = true;
@@ -727,6 +733,7 @@ const App = ({ config, settings, startupWarnings = [], version }: AppProps) => {
       handleSlashCommand,
       isAuthenticating,
       cancelOngoingRequest,
+      settings.merged.debugKeystrokeLogging,
     ],
   );