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>

includes/class-wpdd-install.php

@@ -104,11 +104,17 @@ class WPDD_Install {
             sale_amount decimal(10,2) NOT NULL,
             commission_rate decimal(5,2) NOT NULL,
             creator_earning decimal(10,2) NOT NULL,
+            payout_id bigint(20) DEFAULT NULL,
+            payout_status varchar(20) DEFAULT 'pending',
+            available_at datetime DEFAULT NULL,
             created_at datetime DEFAULT CURRENT_TIMESTAMP,
             PRIMARY KEY (id),
             KEY creator_id (creator_id),
             KEY order_id (order_id),
-            KEY product_id (product_id)
+            KEY product_id (product_id),
+            KEY payout_id (payout_id),
+            KEY payout_status (payout_status),
+            KEY available_at (available_at)
         ) $charset_collate;";
         
         $sql[] = "CREATE TABLE IF NOT EXISTS {$wpdb->prefix}wpdd_payouts (
@@ -146,6 +152,22 @@ class WPDD_Install {
         ) $charset_collate;";
         
         // Software Licensing Tables
+        $sql[] = "CREATE TABLE IF NOT EXISTS {$wpdb->prefix}wpdd_email_logs (
+            id bigint(20) NOT NULL AUTO_INCREMENT,
+            to_email varchar(100) NOT NULL,
+            subject varchar(255) NOT NULL,
+            message longtext NOT NULL,
+            status varchar(20) NOT NULL DEFAULT 'sent',
+            email_type varchar(50) DEFAULT 'general',
+            error_message text DEFAULT NULL,
+            sent_at datetime DEFAULT CURRENT_TIMESTAMP,
+            PRIMARY KEY (id),
+            KEY to_email (to_email),
+            KEY status (status),
+            KEY email_type (email_type),
+            KEY sent_at (sent_at)
+        ) $charset_collate;";
+        
         $sql[] = "CREATE TABLE IF NOT EXISTS {$wpdb->prefix}wpdd_licenses (
             id bigint(20) NOT NULL AUTO_INCREMENT,
             license_key varchar(64) NOT NULL,