style(gui): Apply strict vertical compaction and add type hints

src/gui_2.py

@@ -1016,7 +1016,7 @@ class App:
  def _render_history_window(self) -> None:
   if not self.show_windows.get('Undo/Redo History', False):
    return
-  def iterate_history(history: typing.List[typing.Dict[str, typing.Any]]):
+  def iterate_history(history: typing.List[typing.Dict[str, typing.Any]]) -> None:
    for i, entry in enumerate(reversed(history)):
     actual_idx  = len(history) - 1 - i
     desc        = entry.get("description", "UI Change")
@@ -1801,7 +1801,7 @@ class App:
 
   if self.perf_profiling_enabled: self.perf_monitor.end_component("_render_paths_panel")
 
- def _save_paths(self):
+ def _save_paths(self) -> None:
   """
   [C: tests/test_gui_paths.py:test_save_paths]
   """
@@ -3251,7 +3251,7 @@ class App:
     total_ast   += stats.get("ast_elements", 0)
 
   if missing_keys and not self._file_stats_worker_active:
-   def _stats_worker():
+   def _stats_worker() -> None:
     self._file_stats_worker_active = True
     try:
      for path, key in missing_keys[:10]:
@@ -5156,3 +5156,5 @@ def main() -> None:
 
 if __name__ == "__main__":
  main()
+
+