Add Python init diagnostics, AppImage build system, misc Linux fixes

- python: switch Py_InitializeEx → Py_InitializeFromConfig for explicit
  error reporting; add dladdr + fprintf diagnostics to trace which DSO
  Python symbols resolve to and whether Py_IsInitialized succeeds
- python: log RTLD_NOLOAD vs fresh-load outcome when promoting libpython
  to RTLD_GLOBAL
- build: add Docker-based AppImage build script (build.sh), update
  Dockerfile and build-inner.sh for AppImage-only workflow
- build: remove Flatpak support entirely; move AppImage metadata
  (desktop/metainfo/icon) from flatpak/ to data/
- Add Monster Hunter Wilds basic_games plugin
- .gitignore: exclude squashfs-root, build-source, flatpak-repo,
  __pycache__, fomod-plus-settings.ini
- Various Linux port fixes across wineprefix, processrunner, proton
  launcher, FUSE connector, instance manager, download manager,
  sanitychecks, and NaK Rust paths/runtime_wrap

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

3 files changed, 4 insertions, 6 deletions

diff --git a/libs/game_bethesda/src/*.cpp b/libs/game_bethesda/src/*.cpp
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/libs/game_bethesda/src/*.cpp
diff --git a/libs/game_bethesda/src/gamebryo/gamebryolocalsavegames.cpp b/libs/game_bethesda/src/gamebryo/gamebryolocalsavegames.cpp
index e4df0ea..4c1199c 100644
--- a/libs/game_bethesda/src/gamebryo/gamebryolocalsavegames.cpp
+++ b/libs/game_bethesda/src/gamebryo/gamebryolocalsavegames.cpp
@@ -56,7 +56,9 @@ QString GamebryoLocalSavegames::localSavesDummy() const
 
 QDir GamebryoLocalSavegames::localSavesDirectory() const
 {
-  return QDir(m_Game->myGamesPath()).absoluteFilePath(localSavesDummy());
+  QString dummy = localSavesDummy();
+  dummy.replace("\\", "/");
+  return QDir(m_Game->myGamesPath()).absoluteFilePath(dummy);
 }
 
 QDir GamebryoLocalSavegames::localGameDirectory() const
diff --git a/libs/game_bethesda/src/gamebryo/gamegamebryo.cpp b/libs/game_bethesda/src/gamebryo/gamegamebryo.cpp
index b53d823..4a92440 100644
--- a/libs/game_bethesda/src/gamebryo/gamegamebryo.cpp
+++ b/libs/game_bethesda/src/gamebryo/gamegamebryo.cpp
@@ -494,11 +494,7 @@ QString GameGamebryo::myGamesPath() const
   return findInRegistry(HKEY_LOCAL_MACHINE, L"Software\\LOOT", L"Installed Path") +
          "/Loot.exe";
 #else
-  // On Linux, look for loot in common locations
-  QString flatpakPath = QDir::homePath() + "/.var/app/io.github.loot.loot/data/LOOT/Loot";
-  if (QFileInfo(flatpakPath).exists())
-    return flatpakPath;
-  // Try system PATH
+  // On Linux, look for loot in PATH
   QString systemLoot = QStandardPaths::findExecutable("loot");
   if (!systemLoot.isEmpty())
     return systemLoot;