feat(ui): add sequence API helpers to api.js

services/web-ui/public/js/api.js

@@ -456,3 +456,69 @@ async function createToken(data) {
 async function revokeToken(id) {
     return api(`/tokens/${id}`, { method: 'DELETE' });
 }
+
+// ============================================================
+// SEQUENCE API CALLS
+// ============================================================
+
+async function getSequences(projectId) {
+  return api(`/sequences?project_id=${projectId}`);
+}
+
+async function createSequence(data) {
+  return api('/sequences', {
+    method: 'POST',
+    body: JSON.stringify(data),
+  });
+}
+
+async function getSequence(sequenceId) {
+  return api(`/sequences/${sequenceId}`);
+}
+
+async function updateSequence(sequenceId, data) {
+  return api(`/sequences/${sequenceId}`, {
+    method: 'PUT',
+    body: JSON.stringify(data),
+  });
+}
+
+async function deleteSequence(sequenceId) {
+  return api(`/sequences/${sequenceId}`, { method: 'DELETE' });
+}
+
+/**
+ * Replace all clips in a sequence.
+ * @param {string} sequenceId
+ * @param {Array<{asset_id, track, timeline_in_frames, timeline_out_frames, source_in_frames, source_out_frames}>} clips
+ */
+async function syncSequenceClips(sequenceId, clips) {
+  return api(`/sequences/${sequenceId}/clips`, {
+    method: 'PUT',
+    body: JSON.stringify(clips),
+  });
+}
+
+/**
+ * Download EDL for the V1 track of a sequence.
+ * Triggers a file download in the browser.
+ */
+async function exportSequenceEDL(sequenceId, filename) {
+  try {
+    const response = await fetch(`${API_BASE}/sequences/${sequenceId}/export/edl`, {
+      method: 'POST',
+      credentials: 'include',
+    });
+    if (!response.ok) throw new Error(`EDL export failed: ${response.status}`);
+    const blob = await response.blob();
+    const url  = URL.createObjectURL(blob);
+    const a    = document.createElement('a');
+    a.href     = url;
+    a.download = filename || 'sequence.edl';
+    a.click();
+    URL.revokeObjectURL(url);
+    return { success: true };
+  } catch (error) {
+    return { success: false, error: error.message };
+  }
+}