fix(aur): use XDG_DATA_HOME for DATA_DIR + fix icon names + PNG to WebP

- DATA_DIR now always uses XDG_DATA_HOME (~/.local/share/steamlibrarymanager/)
  instead of relative path - fixes PermissionError on AUR/native installs
- Added legacy data migration from old APP_DIR/data location
- PKGBUILD: install icons with correct reverse-DNS names for desktop entry
- Converted all app images from PNG to WebP (PEGI, defaults, qr_login)
- Updated all code references from .png to .webp
- Removed unused steam_login icon from toolbar buttons
- Updated screenshots with higher quality versions

Author: HeikesFootSlave

packaging/aur/PKGBUILD

@@ -51,11 +51,11 @@ LAUNCHER
     sed -i "s|^Exec=steam-library-manager|Exec=$pkgname|" \
         "$pkgdir/usr/share/applications/io.github.switch_bros.SteamLibraryManager.desktop"
 
-    # Icons
-    install -Dm644 src/resources/icon.png \
-        "$pkgdir/usr/share/pixmaps/$pkgname.png"
+    # Icons (must match Icon= in desktop file: io.github.switch_bros.SteamLibraryManager)
     install -Dm644 src/resources/icon.svg \
         "$pkgdir/usr/share/icons/hicolor/scalable/apps/io.github.switch_bros.SteamLibraryManager.svg"
+    install -Dm644 src/resources/icon.png \
+        "$pkgdir/usr/share/icons/hicolor/512x512/apps/io.github.switch_bros.SteamLibraryManager.png"
 
     # Metainfo (for GNOME Software / KDE Discover)
     install -Dm644 src/resources/io.github.switch_bros.SteamLibraryManager.metainfo.xml \

src/config.py

@@ -52,12 +52,9 @@ class Config:
     RESOURCES_DIR: Path = get_resources_dir()
     ICONS_DIR: Path = RESOURCES_DIR / "icons"
 
-    # DATA_DIR must be writable — use XDG on AppImage/Flatpak, local otherwise
-    DATA_DIR: Path = (
-        Path(os.environ.get("XDG_DATA_HOME", Path.home() / ".local" / "share")) / "steamlibrarymanager"
-        if os.environ.get("APPIMAGE") or os.environ.get("FLATPAK_ID")
-        else APP_DIR / "data"
-    )
+    # DATA_DIR must be writable — XDG Base Directory Specification
+    # Works for all installation types: AUR/native, Flatpak (remaps XDG), AppImage
+    DATA_DIR: Path = Path(os.environ.get("XDG_DATA_HOME", Path.home() / ".local" / "share")) / "steamlibrarymanager"
     CACHE_DIR: Path = DATA_DIR / "cache"
     SETTINGS_FILE: Path = DATA_DIR / "settings.json"
 
@@ -93,8 +90,9 @@ class Config:
 
     def __post_init__(self):
         """Initialize directories and load settings after instantiation."""
-        self.DATA_DIR.mkdir(exist_ok=True)
-        self.CACHE_DIR.mkdir(exist_ok=True)
+        self._migrate_legacy_data_dir()
+        self.DATA_DIR.mkdir(parents=True, exist_ok=True)
+        self.CACHE_DIR.mkdir(parents=True, exist_ok=True)
 
         if self.STEAM_LIBRARIES is None:
             self.STEAM_LIBRARIES = []
@@ -164,6 +162,22 @@ def grid_folder(self) -> Path | None:
 
         return grid_path
 
+    def _migrate_legacy_data_dir(self) -> None:
+        """Migrate data from legacy location (relative to install dir) to XDG path.
+
+        Before v1.2, DATA_DIR was set to APP_DIR/data for non-AppImage/Flatpak
+        installs. This migrates any existing data to the XDG-compliant location.
+        Only runs if old path exists and new path does not.
+        """
+        legacy_data_dir = Path(__file__).resolve().parent.parent / "data"
+        if legacy_data_dir.is_dir() and not self.DATA_DIR.is_dir():
+            import shutil
+
+            logger.info("Migrating data from %s to %s", legacy_data_dir, self.DATA_DIR)
+            self.DATA_DIR.mkdir(parents=True, exist_ok=True)
+            shutil.copytree(legacy_data_dir, self.DATA_DIR, dirs_exist_ok=True)
+            logger.info("Data migration complete")
+
     def _load_settings(self) -> None:
         """Load settings from JSON file."""
         data = load_json(self.SETTINGS_FILE)