fix(gui): fix imgui.selectable() signature mismatch in _render_history_window

selectable() now requires p_selected bool arg, not just label.
Changed to use _, selected = imgui.selectable(label, False) pattern.

src/gui_2.py

@@ -760,7 +760,8 @@ class App:
      ts_str = datetime.datetime.fromtimestamp(ts).strftime("%H:%M:%S")
      
      label = f"[{ts_str}] {desc}##{actual_idx}"
-     if imgui.selectable(label)[0]:
+     _, selected = imgui.selectable(label, False)
+     if selected:
       self._handle_jump_to_history(actual_idx)
    imgui.end_child()
   imgui.end()