Symlink saves, rank prefixes by Steam app type, ntsync safeguards

- Replace copy-in/copy-out save deployment with a direct symlink from the
  prefix's __MO_Saves to the profile's saves/. Writes land in the profile
  immediately; afterRun reverts the symlink + prefix INI so a vanilla
  launch outside MO2 uses the default Saves dir.
- Parse Steam's binary appinfo.vdf (v41) via a new Rust FFI crate backed
  by steam-vdf-parser. Rank detected games by common.type so real Games
  beat Tools/Editors when multiple prefixes share a My Games folder name
  (fixes Creation Kit shadowing Skyrim SE). Top-ranked candidate
  overwrites stale symlinks from earlier runs.
- Switch bundled Steam Linux Runtime downloader from sniper (steamrt3)
  to steamrt4 so Proton 11+ works out of the box. steamrt4 omits xrandr
  so we inject it from the Debian x11-xserver-utils .deb into a
  dedicated dir and prepend it to PATH via `env PATH=...` inside the
  pressure-vessel container (PATH env doesn't propagate).
- Auto-kill stale wineboot/wineserver/pv-adverb processes still bound
  to the prefix before starting a new wineboot -u; match by
  /proc/<pid>/environ WINEPREFIX / STEAM_COMPAT_DATA_PATH since Wine
  cmdlines are Windows-style. Same sweep runs in destroyPrefix so a
  delete actually frees file handles.
- Blacklist Proton 11 (Steam-bundled) — its current Wine tree deadlocks
  during wineboot -u on modern kernels via ntsync / futex_wait_multiple
  races. Use "waitforexitandrun" (not "run") for prefix init so
  use_sessions=1 Protons don't fork into a persistent session manager.
- Drop WINEDEBUG=-all during prefix init so wineboot progress is
  visible. Suppress focus-stealing by setting WA_ShowWithoutActivating
  on the PrefixSetupDialog and SLR download progress dialogs.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/libs/steam_appinfo_ffi/CMakeLists.txt b/libs/steam_appinfo_ffi/CMakeLists.txt
new file mode 100644
index 0000000..46d117e
--- /dev/null
+++ b/libs/steam_appinfo_ffi/CMakeLists.txt
@@ -0,0 +1,35 @@
+cmake_minimum_required(VERSION 3.16)
+project(steam_appinfo_ffi)
+
+if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+  set(CARGO_BUILD_TYPE "debug")
+  set(CARGO_BUILD_FLAGS "")
+else()
+  set(CARGO_BUILD_TYPE "release")
+  set(CARGO_BUILD_FLAGS "--release")
+endif()
+
+set(SAI_FFI_DIR ${CMAKE_CURRENT_SOURCE_DIR})
+set(SAI_FFI_LIB ${SAI_FFI_DIR}/target/${CARGO_BUILD_TYPE}/libsteam_appinfo_ffi.so)
+
+add_custom_command(
+  OUTPUT ${SAI_FFI_LIB}
+  COMMAND cargo build ${CARGO_BUILD_FLAGS}
+  WORKING_DIRECTORY ${SAI_FFI_DIR}
+  COMMENT "Building Steam appinfo FFI library (Rust)"
+  DEPENDS
+    ${SAI_FFI_DIR}/Cargo.toml
+    ${SAI_FFI_DIR}/src/lib.rs
+    ${SAI_FFI_DIR}/vendor/steam-vdf-parser/src/binary/parser.rs
+)
+
+add_custom_target(steam_appinfo_ffi_build DEPENDS ${SAI_FFI_LIB})
+
+add_library(steam_appinfo_ffi_wrapper INTERFACE)
+target_link_libraries(steam_appinfo_ffi_wrapper INTERFACE ${SAI_FFI_LIB})
+target_include_directories(steam_appinfo_ffi_wrapper INTERFACE ${SAI_FFI_DIR}/include)
+add_dependencies(steam_appinfo_ffi_wrapper steam_appinfo_ffi_build)
+add_library(mo2::steam_appinfo_ffi ALIAS steam_appinfo_ffi_wrapper)
+
+install(FILES ${SAI_FFI_LIB} DESTINATION lib)
+install(DIRECTORY ${SAI_FFI_DIR}/include/ DESTINATION include)