fix

.gitea/workflows/build.yml

@@ -35,13 +35,20 @@ jobs:
           cp -r src/main/resources/* out/production/Calc/ 2>/dev/null || true
         fi
 
+    - name: Extract FlatLaf library
+      run: |
+        cd out/production/Calc
+        jar xf ../../../lib/flatlaf-3.7.jar
+        # Remove META-INF to avoid conflicts
+        rm -rf META-INF
+        cd ../../..
+
     - name: Create manifest
       run: |
         echo "Manifest-Version: 1.0" > manifest.txt
         echo "Main-Class: dev.sillyangel.calc.Calculator" >> manifest.txt
-        echo "Class-Path: lib/flatlaf-3.7.jar" >> manifest.txt
 
-    - name: Create JAR
+    - name: Create fat JAR
       run: |
         cd out/production/Calc
         jar cfm ../../../dist/CalcShortforCalculator.jar ../../../manifest.txt .