Major improvements: Fix download limits, enhance license display, fix software filenames

🔧 Bug Fixes:
- Fixed download limits defaulting to 5 instead of 0 for unlimited downloads
- Fixed software license filename sanitization (spaces→dashes, dots→underscores, proper .zip extension)
- Software downloads now show as "Test-Plugin-v2-2-0.zip" instead of "Test Plugin v2.2.0"

✨ UI/UX Enhancements:
- Redesigned license key display to span full table width with FontAwesome copy icons
- Added responsive CSS styling for license key rows
- Integrated FontAwesome CDN for modern copy icons

🏗️ Architecture Improvements:
- Added comprehensive filename sanitization in both download handler and API paths
- Enhanced software license product handling for local package files
- Improved error handling and logging throughout download processes

📦 Infrastructure:
- Added Gitea workflows for automated releases on push to main
- Created comprehensive .gitignore excluding test files and browser automation
- Updated documentation with all recent improvements and technical insights

🔍 Technical Details:
- Software license products served from wp-content/uploads/wpdd-packages/
- Download flow: token → process_download_by_token() → process_download() → deliver_file()
- Dual path coverage for both API downloads and regular file delivery
- Version placeholder system for automated deployment

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitea/workflows/update-version.yml

@@ -0,0 +1,57 @@
+name: Update Plugin Version
+
+on:
+  release:
+    types: [created, edited]
+
+jobs:
+  update-version:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Get release tag
+        id: get_tag
+        run: echo "TAG=${GITEA_REF#refs/tags/}" >> $GITEA_ENV
+
+      - name: Update version in plugin file
+        run: |
+          # Replace version in plugin header
+          sed -i "s/Version: .*/Version: ${{ env.TAG }}/" wp-digital-download.php
+          
+          # Replace version in PHP constant
+          sed -i "s/define('WPDD_VERSION', '[^']*');/define('WPDD_VERSION', '${{ env.TAG }}');/" wp-digital-download.php
+          
+          # Verify changes
+          echo "Plugin header version:"
+          grep "Version:" wp-digital-download.php
+          echo "PHP constant version:"
+          grep "WPDD_VERSION" wp-digital-download.php
+
+      - name: Commit changes
+        run: |
+          git config --local user.email "action@gitea.com"
+          git config --local user.name "Gitea Action"
+          git add wp-digital-download.php
+          git commit -m "Update version to ${{ env.TAG }}"
+          git push
+
+      - name: Create plugin zip
+        run: |
+          mkdir -p /tmp/wp-digital-download
+          rsync -av --exclude=".git" --exclude=".gitea" --exclude=".playwright-mcp" --exclude="build" . /tmp/wp-digital-download/
+          cd /tmp
+          zip -r $GITEA_WORK_DIR/wp-digital-download.zip wp-digital-download
+
+      - name: Upload zip to release
+        uses: actions/upload-release-asset@v1
+        env:
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+        with:
+          upload_url: ${{ gitea.event.release.upload_url }}
+          asset_path: build/wp-digital-download.zip
+          asset_name: wp-digital-download.zip
+          asset_content_type: application/zip