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>

2 files changed, 21 insertions, 15 deletions

diff --git a/libs/basic_games/games/baldursgate3/pak_parser.py b/libs/basic_games/games/baldursgate3/pak_parser.py
index 4ebc83c..533c72e 100644
--- a/libs/basic_games/games/baldursgate3/pak_parser.py
+++ b/libs/basic_games/games/baldursgate3/pak_parser.py
@@ -281,21 +281,12 @@ class BG3PakParser:
             except Exception:
                 pass
 
-            if os.path.exists("/.flatpak-info"):
-                # In Flatpak, host wine binaries can't execute directly
-                # (missing host libraries). Use flatpak-spawn to run on host.
-                spawn_cmd = ["flatpak-spawn", "--host"]
-                if wine_prefix:
-                    spawn_cmd.append(f"--env=WINEPREFIX={wine_prefix}")
-                spawn_cmd.extend(["bash", "-c", command])
-                result = subprocess.run(spawn_cmd, **kwargs)
-            else:
-                env = os.environ.copy()
-                if wine_prefix:
-                    env["WINEPREFIX"] = wine_prefix
-                kwargs["env"] = env
-                kwargs["shell"] = True
-                result = subprocess.run(command, **kwargs)
+            env = os.environ.copy()
+            if wine_prefix:
+                env["WINEPREFIX"] = wine_prefix
+            kwargs["env"] = env
+            kwargs["shell"] = True
+            result = subprocess.run(command, **kwargs)
 
         if result.returncode:
             qWarning(
diff --git a/libs/basic_games/games/game_monsterhunterwilds.py b/libs/basic_games/games/game_monsterhunterwilds.py
new file mode 100644
index 0000000..419377c
--- /dev/null
+++ b/libs/basic_games/games/game_monsterhunterwilds.py
@@ -0,0 +1,15 @@
+from ..basic_game import BasicGame
+
+
+class MonsterHunterWildsGame(BasicGame):
+    Name = "Monster Hunter: Wilds Support Plugin"
+    Author = "AbyssDragnonModding"
+    Version = "1.0.0"
+
+    GameName = "Monster Hunter: Wilds"
+    GameShortName = "monsterhunterwilds"
+    GameBinary = "MonsterHunterWilds.exe"
+    GameDataPath = "%GAME_PATH%"
+    GameSaveExtension = "bin"
+    GameNexusId = 6993
+    GameSteamId = 2246340