Implement version 0.0.3 features

- Add file attachment support for product versions (Media Library)
- Add version auto-detection from uploaded filenames
- Implement secure customer downloads with hash verification
- Add license key copy-to-clipboard functionality
- Redesign customer licenses page with card-based UI
- Fix product versions meta box visibility for non-licensed types
- Add DownloadController for secure file delivery
- Update CLAUDE.md roadmap and session history

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

assets/css/admin.css

@@ -145,3 +145,23 @@
     font-style: italic;
     color: #666;
 }
+
+/* File Upload UI */
+.selected-file-name {
+    display: inline-block;
+    margin-right: 10px;
+    padding: 5px 10px;
+    background: #e7f3ff;
+    border-radius: 3px;
+    font-weight: 500;
+}
+
+.selected-file-name:empty {
+    display: none;
+}
+
+#versions-table .dashicons-media-archive {
+    color: #2271b1;
+    vertical-align: middle;
+    margin-left: 5px;
+}

assets/css/frontend.css

@@ -37,7 +37,206 @@
     color: #383d41;
 }
 
-/* License Table */
+/* License Cards */
+.woocommerce-licenses {
+    display: flex;
+    flex-direction: column;
+    gap: 1.5em;
+}
+
+.license-card {
+    border: 1px solid #e5e5e5;
+    border-radius: 8px;
+    overflow: hidden;
+    background: #fff;
+}
+
+.license-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    padding: 1em 1.5em;
+    background: #f8f9fa;
+    border-bottom: 1px solid #e5e5e5;
+}
+
+.license-header h3 {
+    margin: 0;
+    font-size: 1.1em;
+}
+
+.license-header h3 a {
+    color: inherit;
+    text-decoration: none;
+}
+
+.license-header h3 a:hover {
+    text-decoration: underline;
+}
+
+.license-details {
+    padding: 1.5em;
+}
+
+.license-key-row {
+    display: flex;
+    align-items: center;
+    gap: 0.75em;
+    margin-bottom: 1em;
+    flex-wrap: wrap;
+}
+
+.license-key-row label {
+    font-weight: 600;
+}
+
+.license-key-row code {
+    font-family: 'SF Mono', Monaco, Consolas, monospace;
+    background-color: #f5f5f5;
+    padding: 0.4em 0.8em;
+    border-radius: 4px;
+    font-size: 1em;
+    letter-spacing: 0.05em;
+}
+
+.copy-license-btn {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    width: 32px;
+    height: 32px;
+    padding: 0;
+    background: #f0f0f0;
+    border: 1px solid #ddd;
+    border-radius: 4px;
+    cursor: pointer;
+    transition: all 0.2s ease;
+}
+
+.copy-license-btn:hover {
+    background: #e5e5e5;
+    border-color: #ccc;
+}
+
+.copy-license-btn .dashicons {
+    font-size: 18px;
+    width: 18px;
+    height: 18px;
+}
+
+.copy-feedback {
+    display: inline-block;
+    margin-left: 0.5em;
+    padding: 0.25em 0.5em;
+    font-size: 0.85em;
+    border-radius: 3px;
+}
+
+.copy-feedback.success {
+    background: #d4edda;
+    color: #155724;
+}
+
+.copy-feedback.error {
+    background: #f8d7da;
+    color: #721c24;
+}
+
+.license-info-row {
+    display: flex;
+    gap: 2em;
+    color: #666;
+    font-size: 0.95em;
+    flex-wrap: wrap;
+}
+
+/* Download Section */
+.license-downloads {
+    padding: 1em 1.5em;
+    background: #f8f9fa;
+    border-top: 1px solid #e5e5e5;
+}
+
+.license-downloads h4 {
+    margin: 0 0 0.75em 0;
+    font-size: 0.95em;
+    color: #333;
+}
+
+.download-list {
+    list-style: none;
+    margin: 0;
+    padding: 0;
+}
+
+.download-list li {
+    display: flex;
+    align-items: center;
+    gap: 1em;
+    padding: 0.5em 0;
+    border-bottom: 1px solid #eee;
+}
+
+.download-list li:last-child {
+    border-bottom: none;
+}
+
+.download-link {
+    display: inline-flex;
+    align-items: center;
+    gap: 0.5em;
+    color: #2271b1;
+    text-decoration: none;
+    font-weight: 500;
+}
+
+.download-link:hover {
+    text-decoration: underline;
+}
+
+.download-link .dashicons {
+    font-size: 16px;
+    width: 16px;
+    height: 16px;
+}
+
+.download-version {
+    background: #e7f3ff;
+    padding: 0.2em 0.5em;
+    border-radius: 3px;
+    font-size: 0.85em;
+    color: #2271b1;
+}
+
+.download-date {
+    color: #999;
+    font-size: 0.85em;
+    margin-left: auto;
+}
+
+/* Domain Field */
+#licensed-product-domain-field {
+    margin-top: 2em;
+    padding: 1.5em;
+    background-color: #f8f9fa;
+    border: 1px solid #e5e5e5;
+    border-radius: 4px;
+}
+
+#licensed-product-domain-field h3 {
+    margin-top: 0;
+    margin-bottom: 1em;
+    font-size: 1.1em;
+}
+
+#licensed-product-domain-field .description {
+    display: block;
+    margin-top: 0.5em;
+    font-size: 0.9em;
+    color: #666;
+}
+
+/* Legacy License Table (kept for backwards compatibility) */
 .woocommerce-licenses-table {
     width: 100%;
     border-collapse: collapse;
@@ -64,30 +263,33 @@
     font-size: 0.9em;
 }
 
-/* Domain Field */
-#licensed-product-domain-field {
-    margin-top: 2em;
-    padding: 1.5em;
-    background-color: #f8f9fa;
-    border: 1px solid #e5e5e5;
-    border-radius: 4px;
-}
-
-#licensed-product-domain-field h3 {
-    margin-top: 0;
-    margin-bottom: 1em;
-    font-size: 1.1em;
-}
-
-#licensed-product-domain-field .description {
-    display: block;
-    margin-top: 0.5em;
-    font-size: 0.9em;
-    color: #666;
-}
-
 /* Responsive */
 @media screen and (max-width: 768px) {
+    .license-header {
+        flex-direction: column;
+        align-items: flex-start;
+        gap: 0.5em;
+    }
+
+    .license-key-row {
+        flex-direction: column;
+        align-items: flex-start;
+    }
+
+    .license-info-row {
+        flex-direction: column;
+        gap: 0.5em;
+    }
+
+    .download-list li {
+        flex-wrap: wrap;
+    }
+
+    .download-date {
+        margin-left: 0;
+        width: 100%;
+    }
+
     .woocommerce-licenses-table,
     .woocommerce-licenses-table thead,
     .woocommerce-licenses-table tbody,