added github actions

.github/workflows/build-client.yml

@@ -0,0 +1,137 @@
+name: Build Client for All Platforms
+
+on:
+  push:
+    branches: [ main, develop ]
+    paths:
+      - 'Client/**'
+  pull_request:
+    branches: [ main ]
+    paths:
+      - 'Client/**'
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+      
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: '18'
+        cache: 'npm'
+        cache-dependency-path: Client/package-lock.json
+        
+    - name: Install dependencies
+      working-directory: ./Client
+      run: npm ci
+      
+    - name: Build for ${{ matrix.os }}
+      working-directory: ./Client
+      run: |
+        if [ "${{ matrix.os }}" = "ubuntu-latest" ]; then
+          npm run build-linux
+        elif [ "${{ matrix.os }}" = "windows-latest" ]; then
+          npm run build-win
+        elif [ "${{ matrix.os }}" = "macos-latest" ]; then
+          npm run build-mac
+        fi
+      shell: bash
+      
+    - name: Upload artifacts
+      uses: actions/upload-artifact@v4
+      with:
+        name: client-${{ matrix.os }}
+        path: Client/dist/
+        retention-days: 30
+
+  package:
+    needs: build
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+      
+    - name: Download all artifacts
+      uses: actions/download-artifact@v4
+      with:
+        path: artifacts
+        
+    - name: Create release directory
+      run: mkdir -p release
+      
+    - name: Organize files by platform
+      run: |
+        # Windows files
+        mkdir -p release/Windows
+        cp -r artifacts/client-windows-latest/* release/Windows/ 2>/dev/null || true
+        
+        # macOS files  
+        mkdir -p release/macOS
+        cp -r artifacts/client-macos-latest/* release/macOS/ 2>/dev/null || true
+        
+        # Linux files
+        mkdir -p release/Linux
+        cp -r artifacts/client-ubuntu-latest/* release/Linux/ 2>/dev/null || true
+        
+        # Create platform info file
+        cat > release/PLATFORMS.txt << EOF
+        Galaxy Strike Online - Multi-Platform Client
+        ==========================================
+        
+        Windows:
+        - NSIS Installer (.exe)
+        - Portable executable (.exe)
+        
+        macOS:
+        - DMG disk image
+        - ZIP archive
+        
+        Linux:
+        - AppImage (universal executable)
+        - Debian package (.deb)
+        
+        Build Date: $(date -u +"%Y-%m-%d %H:%M:%S UTC")
+        Commit: ${{ github.sha }}
+        EOF
+        
+    - name: Create all-in-one zip
+      run: |
+        cd release
+        zip -r ../Galaxy-Strike-Online-Client-${{ github.sha }}.zip .
+        
+    - name: Upload all-in-one zip
+      uses: actions/upload-artifact@v4
+      with:
+        name: galaxy-strike-online-client-all-platforms
+        path: Galaxy-Strike-Online-Client-${{ github.sha }}.zip
+        retention-days: 90
+        
+    - name: Create Release
+      if: startsWith(github.ref, 'refs/tags/')
+      uses: softprops/action-gh-release@v1
+      with:
+        files: Galaxy-Strike-Online-Client-${{ github.sha }}.zip
+        name: Galaxy Strike Online Client - ${{ github.ref_name }}
+        body: |
+          Multi-platform client release for Galaxy Strike Online.
+          
+          Includes:
+          - Windows (NSIS installer + Portable)
+          - macOS (DMG + ZIP) 
+          - Linux (AppImage + Debian package)
+          
+          Commit: ${{ github.sha }}
+        draft: false
+        prerelease: false
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}