first commit

src/main/java/de/winniepat/citrus/managers/FullbrightManager.java

@@ -0,0 +1,28 @@
+package de.winniepat.citrus.managers;
+
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.text.Text;
+
+public class FullbrightManager {
+    private static final double BRIGHT_VALUE = 15.0;
+    private static final double NORMAL_VALUE = 1.0;
+
+    public static void toggle(MinecraftClient client) {
+        ConfigManager.config.fullbrightEnabled = !ConfigManager.config.fullbrightEnabled;
+        ConfigManager.save();
+
+        apply(client);
+
+        if (client.player != null) {
+            String status = ConfigManager.config.fullbrightEnabled ? "§aON" : "§cOFF";
+            client.player.sendMessage(Text.literal("Fullbright: " + status), true);
+        }
+    }
+
+    public static void apply(MinecraftClient client) {
+        if (client == null || client.options == null) return;
+
+        double target = ConfigManager.config.fullbrightEnabled ? BRIGHT_VALUE : NORMAL_VALUE;
+        client.options.getGamma().setValue(target);
+    }
+}