Fix shadowed build + theme enhancements for macOS

Author: PhoenixVX

gui/build.gradle

@@ -29,5 +29,7 @@ tasks.named("shadowJar", ShadowJar) {
 	archiveBaseName.set("RetroMCP-GUI")
 	archiveClassifier.set("all")
 	setDestinationDirectory(rootProject.getLayout().getBuildDirectory().dir("libs"))
-	minimize() // This breaks FlatLaf
+	minimize() {
+		 exclude(dependency(libs.flatlaf.get()))
+	}
 }

gui/src/main/java/org/mcphackers/mcp/Theme.java

@@ -12,6 +12,9 @@
 import com.formdev.flatlaf.FlatDarkLaf;
 import com.formdev.flatlaf.FlatIntelliJLaf;
 import com.formdev.flatlaf.FlatLightLaf;
+import com.formdev.flatlaf.themes.FlatMacDarkLaf;
+import com.formdev.flatlaf.themes.FlatMacLightLaf;
+import org.mcphackers.mcp.tools.OS;
 
 public class Theme {
 	public static final Map<String, Theme> THEMES_MAP = new HashMap<>();
@@ -25,6 +28,11 @@ public class Theme {
 		addTheme(FlatDarkLaf.NAME, FlatDarkLaf.class.getName());
 		addTheme(FlatIntelliJLaf.NAME, FlatIntelliJLaf.class.getName());
 		addTheme(FlatDarculaLaf.NAME, FlatDarculaLaf.class.getName());
+
+		if (OS.getOs() == OS.osx) {
+			addTheme(FlatMacLightLaf.NAME, FlatMacLightLaf.class.getName());
+			addTheme(FlatMacDarkLaf.NAME, FlatMacDarkLaf.class.getName());
+		}
 	}
 
 	public final String themeName;

gui/src/main/java/org/mcphackers/mcp/gui/TextAreaOutputStream.java

@@ -34,8 +34,10 @@ public void print(String s) {
 
 	@Override
 	public void println(String s) {
-		super.println(s);
-		printString("\n");
+		if (s != null && !s.isEmpty()) {
+			super.println(s);
+			printString("\n");
+		}
 	}
 
 	private void printString(String msg) {