Navigate before initializing page state

admin/static/dashboard.html

@@ -183,7 +183,7 @@
 
     <div class="fg">
       <label>Target URL</label>
-      <input id="cfg-target-url" type="url" placeholder="https://example.com" />
+      <input id="cfg-target-url" type="url" placeholder="https://example.com" required />
     </div>
 
     <div class="fg" style="display:flex;align-items:center;gap:10px;margin-bottom:14px">
@@ -1189,6 +1189,7 @@ document.getElementById('cfg-digipay-match').addEventListener('change', e => {
 document.getElementById('form-save').addEventListener('click', async () => {
   const body = collectForm();
   if (!body.name) { alert('Config name is required.'); return; }
+  if (!body.target_url) { alert('Target URL is required.'); return; }
 
   const cfgId = document.getElementById('cfg-id').value;
   const isEdit = !!cfgId;
@@ -1408,6 +1409,11 @@ function startBatchPoll() {
 document.getElementById('batch-start-btn').addEventListener('click', async () => {
   const configId = parseInt(document.getElementById('batch-config-select').value);
   if (!configId) { alert('Please select a flow config.'); return; }
+  const selectedConfig = _configs.find(c => c.id === configId);
+  if (!selectedConfig?.target_url) {
+    alert('The selected flow config has no Target URL. Edit and save it first.');
+    return;
+  }
   const workers  = parseInt(document.getElementById('batch-workers').value) || 3;
   const runs     = parseInt(document.getElementById('batch-runs').value) || 10;
   const stagger  = parseInt(document.getElementById('batch-stagger').value) || 0;
@@ -1420,8 +1426,11 @@ document.getElementById('batch-start-btn').addEventListener('click', async () =>
   });
 
   if (!res) return;
-  if (res.status === 404) { const d = await res.json(); alert(d.detail || 'Flow config not found.'); return; }
-  if (!res.ok) { alert('Failed to add task.'); return; }
+  if (!res.ok) {
+    const d = await res.json().catch(() => ({}));
+    alert(d.detail || 'Failed to add task.');
+    return;
+  }
 
   const data = await res.json();
   await pollBatchStatus();