FIX Levels no longer dispose the shared walking camera on teardown; ThreadDispatcher is shared and no longer per collision model;
FIX OffScreenImGuiManagerPool tracks free slots and grows on demand instead of counting by dictionary size;
MI Dev tools: ImGuiOneTimeButton and ImGuiLongRunningButton, TheGreatEscaper preloads the level it launches, component list in the debug overlay;
MI Component preloading pipeline: game components gain PreLoadContent/StartPreloading/IsPreLoaded/IsReady
MI ThreadSafeContentManager so Content.Load is safe from the preload thread; area builders memoization now locked;
SRV Headless game handle the new preload logic;
SRV Revalidation workers scheduling logic;
SX-DEV New campaign levels L18 and L19;
SX-DEV Level 17 test meshes;
Legends: NEW new element/feature, FIX bug/error fix, UX User eXperience, CX Challenge eXperience, CSE Community Stage Editor, TLS localization, MI Miscellaneous, SRV server side code, INF infrastructure, -EXP experimental build, -DEV dev build only