add branch validation to queue

asf-cloud-server/testarena_1/app/static/css/style.css

@@ -540,3 +540,87 @@ body {
 .empty-state h3 {
     margin-bottom: 10px;
 }
+/* Context Menu */
+.context-menu {
+    display: none;
+    position: absolute;
+    background: white;
+    border: 1px solid var(--border);
+    border-radius: 8px;
+    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
+    z-index: 1000;
+    min-width: 150px;
+}
+
+.context-menu-item {
+    padding: 12px 16px;
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    transition: background-color 0.2s;
+}
+
+.context-menu-item:hover {
+    background: var(--light);
+}
+
+.context-menu-item:first-child {
+    border-radius: 8px 8px 0 0;
+}
+
+.context-menu-item:last-child {
+    border-radius: 0 0 8px 8px;
+}
+
+.context-menu-icon {
+    font-size: 16px;
+}
+
+/* Branch Validation */
+.branch-validation {
+    margin-top: 15px;
+    padding: 12px;
+    border-radius: 8px;
+    display: none;
+}
+
+.branch-validation.success {
+    background: #d1fae5;
+    color: #065f46;
+    border: 1px solid #10b981;
+}
+
+.branch-validation.error {
+    background: #fee2e2;
+    color: #991b1b;
+    border: 1px solid #ef4444;
+}
+
+.branch-validation.loading {
+    background: #fef3c7;
+    color: #92400e;
+    border: 1px solid #f59e0b;
+}
+
+.loading-spinner {
+    display: inline-block;
+    width: 16px;
+    height: 16px;
+    border: 2px solid #f3f3f3;
+    border-top: 2px solid var(--primary);
+    border-radius: 50%;
+    animation: spin 1s linear infinite;
+    margin-right: 8px;
+}
+
+@keyframes spin {
+    0% { transform: rotate(0deg); }
+    100% { transform: rotate(360deg); }
+}
+
+.btn:disabled {
+    background: #9ca3af;
+    cursor: not-allowed;
+    opacity: 0.6;
+}