Fix CI: support Windows and macOS in build workflow

- Use macos-15-intel for stable Java 8 support with setup-java@v1
- Move -DskipTests and -Dmaven.javadoc.skip to MAVEN_OPTS to bypass PowerShell arg parsing on Windows
- Add macOS JAVA_HOME fix step for Contents/Home subdirectory

Assisted-by: Claude Code

Author: addwes7

.github/workflows/maven.yml

@@ -6,18 +6,26 @@ on:
 jobs:
   build:
     runs-on: ${{ matrix.os }}
+    env:
+      MAVEN_OPTS: "-DskipTests=true -Dmaven.javadoc.skip=true"
     steps:
       - uses: actions/checkout@v1
       - name: Set up JDK 1.8
         uses: actions/setup-java@v1
         with:
           java-version: 1.8
+      - name: Fix JAVA_HOME on macOS
+        if: runner.os == 'macOS'
+        run: |
+          if [ -d "$JAVA_HOME/Contents/Home" ]; then
+            echo "JAVA_HOME=$JAVA_HOME/Contents/Home" >> $GITHUB_ENV
+          fi
       - name: Build with Maven
-        run: mvn clean package -DskipTests=true -Dmaven.javadoc.skip=true -B -V
+        run: mvn clean package -B -V
     strategy:
       matrix:
         os:
           - ubuntu-latest
           - windows-latest
-          - macos-latest
+          - macos-15-intel
       fail-fast: false