Introduce a C++ runtime injection that adds a Multiplayer row to the Fallout 4 main menu instead of patching MainMenu.swf. Adds F4TMainMenuInject.h/cpp implementing injection, ITEM_PRESS handling, accept/button hooks, resync tasks and logging; integrates installation by calling MainMenuInject::Install() from PrismaUI init. Update PrismaUI to use the new helper and remove a duplicate IsMainMenuOnMainPanel implementation. Documentation updated to deprecate FFDec SWF patching (new docs/MainMenu_Injection.md, note in FFDEC guide, and setup.md) and restore-vanilla-mainmenu.ps1 messaging updated to instruct using the runtime injection.
Add comprehensive FFDec walkthrough and short patch docs for safely adding a Multiplayer item to MainMenu.swf, plus helper scripts to extract the vanilla SWF and restore it (tools/extract_ba2.py, tools/restore-vanilla-mainmenu.ps1). Update exported MainMenu.as with a warning comment and remove an outdated exported PATCH markdown. Patch binary Interface/MainMenu.swf (updated).
Hardening fixes in the plugin: include GFx headers, avoid leaving the PrismaUI overlay focused after menu changes, only call OnBrowserHidden when the browser was actually visible, and add IsMainMenuOnMainPanel() so WatchMainMenuState ignores MainMenu when not on the MAIN_STATE. Ensure events are only dispatched when the browser is valid & visible (CanDispatchToBrowser) and make Scaleform UI hide the browser immediately during transitions. These changes prevent the overlay from staying focused during Settings transitions and stop JS events from being sent to a hidden/invalid view.
andrew