fix: SettingsManager null guard, ui_ filter, double cast for sensitivity/deadzone

Autoloads/SettingsManager.cs

@@ -42,6 +42,12 @@ public partial class SettingsManager : Node
     {
         Instance = this;
 
+        if (ConfigFileHandler.Instance == null)
+        {
+            GD.PushError("SettingsManager: ConfigFileHandler.Instance is null");
+            return;
+        }
+
         var cfg = ConfigFileHandler.Instance.SettingsConfig;
 
         // --- display_settings ---
@@ -98,8 +104,8 @@ public partial class SettingsManager : Node
     public void SaveGameplaySettings()
     {
         var cfg = ConfigFileHandler.Instance.SettingsConfig;
-        cfg.SetValue("gameplay_settings", "gamepad_deadzone", GamepadDeadzone);
+        cfg.SetValue("gameplay_settings", "gamepad_deadzone", (double)GamepadDeadzone);
-        cfg.SetValue("gameplay_settings", "gamepad_sensitivity", GamepadSensitivity);
+        cfg.SetValue("gameplay_settings", "gamepad_sensitivity", (double)GamepadSensitivity);
         cfg.Save(ConfigFileHandler.SettingsPath);
     }
 
@@ -108,6 +114,7 @@ public partial class SettingsManager : Node
         var cfg = ConfigFileHandler.Instance.SettingsConfig;
         foreach (var action in InputMap.GetActions())
         {
+            if (action.ToString().StartsWith("ui_")) continue;
             foreach (var ev in InputMap.ActionGetEvents(action))
             {
                 if (ev is InputEventKey key)
@@ -157,6 +164,7 @@ public partial class SettingsManager : Node
 
         foreach (var actionName in cfg.GetSectionKeys("input_settings"))
         {
+            if (actionName.StartsWith("ui_")) continue;
             if (!InputMap.HasAction(actionName)) continue;
 
             var scancode = (Key)(long)cfg.GetValue("input_settings", actionName);