Fix AppImage plugin loading, save timestamps, and INI corruption

- Add AppConfig::pluginsPath()/dllsPath() that respect MO2_PLUGINS_DIR
  and MO2_DLLS_DIR env vars, fixing plugin discovery when plugins live
  inside read-only AppImage squashfs (#22, game plugin not found errors)
- Preserve file modification times in save deploy/sync so games display
  correct save timestamps instead of all showing the same time (#17)
- Replace QSettings INI reader in saves tab with direct line-by-line
  parser to avoid backslash-as-line-continuation corruption of
  sLocalSavePath=__MO_Saves\ (#22, saves tab showing wrong directory)
- Add diagnostic logging to plugin symlink creation, save backup/restore
  operations to help diagnose silent failures through prefix symlinks
- Fix Python SONAME mismatch in AppImage build (patch portable Python
  SONAME to match librunner.so DT_NEEDED, preventing dual libpython load)
- Bundle PyQt6 Qt dependencies, improve RPATH for lib/ and plugins/

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

1 files changed, 29 insertions, 2 deletions

diff --git a/libs/nak/src/game_finder/mod.rs b/libs/nak/src/game_finder/mod.rs
index c383c8a..600751a 100644
--- a/libs/nak/src/game_finder/mod.rs
+++ b/libs/nak/src/game_finder/mod.rs
@@ -20,7 +20,10 @@ use std::path::PathBuf;
 
 pub use bottles::detect_bottles_games;
 pub use heroic::detect_heroic_games;
-pub use known_games::{find_by_gog_id, find_by_name, find_by_steam_id, KnownGame, KNOWN_GAMES};
+pub use known_games::{
+    find_by_epic_id, find_by_gog_id, find_by_name, find_by_steam_id, find_by_title, KnownGame,
+    KNOWN_GAMES,
+};
 pub use registry::{read_registry_value, wine_path_to_linux};
 pub use steam::{detect_steam_games, find_game_install_path, find_game_prefix_path, get_known_game};
 
@@ -161,10 +164,16 @@ impl GameScanResult {
 // Public API
 // ============================================================================
 
-/// Detect all installed games from all supported launchers
+/// Detect all installed games from all supported launchers.
+///
+/// Games are detected in priority order: Steam -> Heroic (GOG -> Epic) -> Bottles.
+/// When the same game is found from multiple launchers, the higher-priority
+/// detection is kept and duplicates are skipped. This ensures registry entries
+/// (which are shared across storefronts) prefer Steam paths, then GOG, then Epic.
 pub fn detect_all_games() -> GameScanResult {
     let mut result = GameScanResult::default();
 
+    // Detect in priority order: Steam first, then GOG (via Heroic), then Epic, then Bottles.
     let steam_games = detect_steam_games();
     result.steam_count = steam_games.len();
     result.games.extend(steam_games);
@@ -177,9 +186,27 @@ pub fn detect_all_games() -> GameScanResult {
     result.bottles_count = bottles_games.len();
     result.games.extend(bottles_games);
 
+    // Deduplicate: keep the first occurrence of each game (by registry_path),
+    // which respects the detection order (Steam > GOG > Epic > Bottles).
+    deduplicate_games(&mut result);
+
     result
 }
 
+/// Remove duplicate game detections, keeping the first (highest-priority) entry.
+/// Two games are considered duplicates if they have the same registry_path.
+fn deduplicate_games(result: &mut GameScanResult) {
+    let mut seen_registry_paths = std::collections::HashSet::new();
+    result.games.retain(|game| {
+        if let Some(ref reg_path) = game.registry_path {
+            seen_registry_paths.insert(reg_path.clone())
+        } else {
+            // Games without registry paths are always kept (no risk of conflict)
+            true
+        }
+    });
+}
+
 /// Detect only Steam games
 pub fn detect_steam_only() -> GameScanResult {
     let steam_games = detect_steam_games();