feat: Add auto-detection and integration for game performance wrappers like gamemoderun and game-performance.

wrapper.py

@@ -355,6 +355,30 @@ def main():
             config['launcher_cmd'] = cmd
             config_dirty = True
         
+    # 2.5 Auto-detect gamemode/game-performance
+    if "use_gamemode" not in config:
+        gamemode_cmd = None
+        if shutil.which("game-performance"):
+            gamemode_cmd = "game-performance"
+        elif shutil.which("gamemoderun"):
+            gamemode_cmd = "gamemoderun"
+            
+        if gamemode_cmd:
+            print(f"\n'{gamemode_cmd}' was detected on your system.")
+            print("Would you like to enable it for XIVLauncher? This can improve game performance.")
+            try:
+                choice = input(f"Enable {gamemode_cmd}? [Y/n]: ").strip().lower()
+            except (EOFError, KeyboardInterrupt):
+                choice = 'n'
+                print("\nPrompt interrupted, defaulting to No.")
+                
+            if choice in ('', 'y', 'yes'):
+                config["use_gamemode"] = True
+                config["gamemode_cmd"] = gamemode_cmd
+            else:
+                config["use_gamemode"] = False
+            config_dirty = True
+
     # Save config if updated (e.g. launcher_cmd detected)
     if config_dirty:
         try:
@@ -384,6 +408,18 @@ def main():
         import shlex
         args = shlex.split(cmd)
         
+        # Prepend gamemode wrapper if enabled
+        if config.get("use_gamemode"):
+            g_cmd = config.get("gamemode_cmd")
+            if not g_cmd:
+                if shutil.which("game-performance"):
+                    g_cmd = "game-performance"
+                elif shutil.which("gamemoderun"):
+                    g_cmd = "gamemoderun"
+            if g_cmd and shutil.which(g_cmd):
+                args.insert(0, g_cmd)
+                print(f"Using game performance wrapper: {g_cmd}")
+
         # Inject XL_SECRET_PROVIDER=file environment variable
         env = os.environ.copy()
         env['XL_SECRET_PROVIDER'] = 'file'