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>

assets/css/frontend.css

@@ -466,4 +466,63 @@
 .wpdd-login-required a {
     color: #856404;
     font-weight: bold;
+}
+
+/* License Key Display */
+.wpdd-license-row {
+    background: #f8f9fa;
+}
+
+.wpdd-license-cell {
+    padding: 8px 12px !important;
+    border-top: 1px solid #ddd;
+}
+
+.wpdd-license-info {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    flex-wrap: wrap;
+    margin: 0;
+}
+
+.wpdd-license-info small {
+    color: #666;
+    font-weight: 500;
+    white-space: nowrap;
+}
+
+.wpdd-license-key {
+    background: #f8f9fa;
+    padding: 4px 8px;
+    border-radius: 4px;
+    font-family: monospace;
+    font-size: 12px;
+    border: 1px solid #ddd;
+    color: #333;
+}
+
+.wpdd-copy-license {
+    background: #0073aa;
+    color: white;
+    border: none;
+    padding: 4px 8px;
+    border-radius: 4px;
+    cursor: pointer;
+    font-size: 12px;
+    line-height: 1;
+    transition: background 0.3s;
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    min-width: 24px;
+    height: 24px;
+}
+
+.wpdd-copy-license:hover {
+    background: #005a87;
+}
+
+.wpdd-copy-license i {
+    font-size: 11px;
 }