FEATURE
Menu bar removes animated companions and allocates their space to Grok
The menu bar no longer displays animated spirit companions, as menubar/critter_frames.py, the shared NSTimer, the animateCritters_ selector, critter_animation_tick(), and refresh.py's animation_groups data flow have all been removed alongside the 15 animation frames and the assets/critters/lion/ directory. Grok now takes over that space: when not hide_grok and grok_weekly.percent is not None, _menubar_attributed_title() and _compose_title() use assets/grok_mono_menubar.png and _grok_menubar_icon() to insert Grok right after Antigravity while preserving the existing separator behavior. The hide_grok setting remains True by default.