fix(web-ui): PipelineStartModal에 initialTrackId 전달

src/pages/music/components/PipelineStartModal.jsx

@@ -1,8 +1,8 @@
 import { useState } from 'react';
 import { createPipeline, startPipeline } from '../../../api';
 
-export default function PipelineStartModal({ library, onClose, onCreated }) {
-    const [tid, setTid] = useState(library?.[0]?.id || '');
+export default function PipelineStartModal({ library, initialTrackId, onClose, onCreated }) {
+    const [tid, setTid] = useState(initialTrackId || library?.[0]?.id || '');
     const [error, setError] = useState('');
 
     const submit = async () => {

src/pages/music/components/PipelineTab.jsx

@@ -45,6 +45,7 @@ export default function PipelineTab({ library, initialTrackId }) {
             {modalOpen && (
                 <PipelineStartModal
                     library={library}
+                    initialTrackId={initialTrackId}
                     onClose={() => setModalOpen(false)}
                     onCreated={() => { setModalOpen(false); load(); }}
                 />