fix: Resolve 'n' key navigation issue by using ASCII code

gtm

@@ -312,9 +312,6 @@ def jump_to_next_change(state: AppState) -> AppState:
     if next_idx != -1:
         # Get the start position of the change block
         new_scroll = max(0, state.change_blocks[next_idx][0] - 3)  # Show 3 lines of context above
-        # Add debug output to a log file
-        with open("/tmp/gtm_debug.log", "a") as f:
-            f.write(f"Jumping to change block {next_idx+1}/{len(state.change_blocks)}, line {state.change_blocks[next_idx][0]}\n")
         return replace(state, right_scroll_offset=new_scroll, current_change_idx=next_idx)
     return state
 
@@ -750,12 +747,10 @@ def handle_keyboard_input(key, state: AppState) -> AppState:
         return toggle_sidebar(state)
     elif key == ord('w'):
         return replace(state, wrap_lines=not state.wrap_lines)
-    elif key == ord('n'):
-        # Remove the focus check to allow 'n' to work regardless of focus
+    elif key == 110:  # ASCII code for 'n'
         if state.show_whole_diff or state.show_additions or state.show_deletions:
             return jump_to_next_change(state)
-    elif key == ord('p'):
-        # Remove the focus check to allow 'p' to work regardless of focus
+    elif key == 112:  # ASCII code for 'p'
         if state.show_whole_diff or state.show_additions or state.show_deletions:
             return jump_to_prev_change(state)
     elif key in [curses.KEY_LEFT, ord('h')]: