fix: improve UI responsiveness during git operations

- Fix show_error_popup() getmaxyx parameter order bug
- Update branch view immediately after amend operations with get_ncurses_git_branches()
- Fix push operation displaying only branch pane during force push dialog
- Remove aggressive screen clearing from commit dialog to prevent UI flicker
- Optimize post-commit refresh to only update changed windows

These changes eliminate jarring full-screen redraws and make git operations
feel much more responsive and smooth.

ncurses_diff_viewer.c

@@ -1078,7 +1078,7 @@ int get_commit_title_input(char *title, int max_len, char *message,
     }
   }
 
-  // Clean up windows.
+  // Clean up windows
   delwin(title_win);
   delwin(message_win);