add branch validation to queue

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

@@ -623,4 +623,134 @@ body {
     background: #9ca3af;
     cursor: not-allowed;
     opacity: 0.6;
+}/
+* Scenario Tree Styles */
+.scenario-controls {
+    margin: 20px 0;
+    padding: 15px;
+    background: var(--light);
+    border-radius: 8px;
+    display: flex;
+    align-items: center;
+    gap: 10px;
+}
+
+.scenario-tree {
+    border: 1px solid var(--border);
+    border-radius: 8px;
+    padding: 20px;
+    background: white;
+    margin: 20px 0;
+    max-height: 500px;
+    overflow-y: auto;
+}
+
+.tree-layer {
+    margin-bottom: 15px;
+}
+
+.tree-stack {
+    margin-left: 20px;
+    margin-bottom: 10px;
+}
+
+.tree-scenario {
+    margin-left: 40px;
+    margin-bottom: 5px;
+}
+
+.tree-node {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    padding: 8px 0;
+    cursor: pointer;
+    user-select: none;
+}
+
+.tree-toggle {
+    width: 16px;
+    height: 16px;
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    font-size: 12px;
+    color: var(--primary);
+    font-weight: bold;
+    cursor: pointer;
+}
+
+.tree-spacer {
+    width: 16px;
+    height: 16px;
+}
+
+.tree-label {
+    font-weight: 500;
+    cursor: pointer;
+    margin: 0;
+}
+
+.layer-label {
+    font-size: 16px;
+    font-weight: 600;
+    color: var(--dark);
+}
+
+.stack-label {
+    font-size: 14px;
+    font-weight: 500;
+    color: #4b5563;
+}
+
+.scenario-label {
+    font-size: 13px;
+    font-weight: 400;
+    color: #6b7280;
+}
+
+.tree-children {
+    margin-top: 5px;
+}
+
+.layer-checkbox, .stack-checkbox, .scenario-checkbox {
+    width: 16px;
+    height: 16px;
+    cursor: pointer;
+}
+
+.layer-node:hover {
+    background: rgba(59, 130, 246, 0.05);
+    border-radius: 4px;
+}
+
+.stack-node:hover {
+    background: rgba(16, 185, 129, 0.05);
+    border-radius: 4px;
+}
+
+.scenario-node:hover {
+    background: rgba(245, 158, 11, 0.05);
+    border-radius: 4px;
+}
+
+/* Indeterminate checkbox styling */
+input[type="checkbox"]:indeterminate {
+    background-color: var(--primary);
+    border-color: var(--primary);
+}
+
+input[type="checkbox"]:indeterminate::before {
+    content: '−';
+    color: white;
+    font-weight: bold;
+    display: block;
+    text-align: center;
+    line-height: 14px;
+}
+
+/* Selection count styling */
+#selectionCount {
+    color: var(--primary);
+    font-size: 14px;
 }