Add Root Builder plugin, Linux game detection, and OMOD installer fix

- New native Root Builder plugin (src/plugins/rootbuilder.py) with copy
  and symlink deploy modes, auto-deploy hooks, backup/restore, and
  third-party conflict detection that moves incompatible plugins to
  DisabledPlugins/. In link mode, .exe/.dll are always copied to avoid
  Wine/Proton path resolution issues with symlinked executables.

- Fix basic_games detection on Linux: steam_utils now checks native
  Steam paths (~/.local/share/Steam, Flatpak, Snap), epic_utils uses
  correct Linux Heroic config paths, gog_utils falls back to Heroic
  GOG installed.json when Windows registry is unavailable.

- Fix OMOD installer crash: isArchiveSupported now handles both IFileTree
  (from mod list refresh) and string (from install check) arguments.

- Add flatpak manifest step to copy source-tree Python plugins
  (src/plugins/*.py) into the build output.

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

1 files changed, 15 insertions, 0 deletions

diff --git a/libs/basic_games/epic_utils.py b/libs/basic_games/epic_utils.py
index 94ae6a9..afdccd5 100644
--- a/libs/basic_games/epic_utils.py
+++ b/libs/basic_games/epic_utils.py
@@ -87,6 +87,21 @@ def find_legendary_games(
 
 
 def find_heroic_games(errors: ErrorList | None = None):
+    # Linux: Heroic stores config in ~/.config/heroic/ (or Flatpak equivalent).
+    for candidate in (
+        Path.home() / ".config" / "heroic" / "legendaryConfig",
+        Path.home()
+        / ".var"
+        / "app"
+        / "com.heroicgameslauncher.hgl"
+        / "config"
+        / "heroic"
+        / "legendaryConfig",
+    ):
+        if candidate.is_dir():
+            return find_legendary_games(str(candidate), errors)
+
+    # Windows fallback.
     return find_legendary_games(
         os.path.expandvars(r"%AppData%\heroic\legendaryConfig"), errors
     )