feat(MediaManager): add VMS creation functionality and UI enhancements

src/app/components/MediaManager.tsx

@@ -21,6 +21,7 @@ import {
   Hash,
   Home,
   Image as ImageIcon,
+  Layers,
   Loader2,
   MoreVertical,
   Move,
@@ -370,9 +371,11 @@ export default function MediaManager({ initialPath, rootPath, title, config, set
   const [viewHexData, setViewHexData] = useState<Uint8Array | null>(null);
   const [viewLoading, setViewLoading] = useState(false);
 
-  // Rename / folder
+  // Rename / folder / VMS
   const [showNewFolder, setShowNewFolder] = useState(false);
   const [newFolderName, setNewFolderName] = useState('');
+  const [showCreateVms, setShowCreateVms] = useState(false);
+  const [vmsName, setVmsName]             = useState('');
   const [renameEntry, setRenameEntry]   = useState<EntryInfo | null>(null);
   const [renameName, setRenameName]     = useState('');
   const [mountEntry, setMountEntry]     = useState<EntryInfo | null>(null);
@@ -781,6 +784,36 @@ export default function MediaManager({ initialPath, rootPath, title, config, set
     void openEntry(entry, 'config');
   };
 
+  // ── Create VMS ───────────────────────────────────────────────────────────
+
+  const openCreateVms = () => {
+    const folderName = path.split('/').filter(Boolean).pop() ?? 'playlist';
+    setVmsName(folderName + '.vms');
+    setShowNewFolder(false);
+    setShowCreateVms(true);
+  };
+
+  const handleCreateVms = async () => {
+    const name = vmsName.trim();
+    if (!name) return;
+    const filename = name.endsWith('.vms') ? name : name + '.vms';
+    const selectedFiles = entries.filter(e => selected.has(e.path) && e.type === 'file');
+    const content = selectedFiles
+      .map(e => {
+        const stem = e.name.includes('.') ? e.name.slice(0, e.name.lastIndexOf('.')) : e.name;
+        return `${e.name},${stem}`;
+      })
+      .join('\n') + '\n';
+    try {
+      await putFileContents(joinPath(path, filename), content);
+      toast.success(`Created "${filename}"`);
+      setShowCreateVms(false);
+      setVmsName('');
+      setSelected(new Set());
+      void load(path);
+    } catch (e: any) { toast.error(`Failed to create VMS: ${e?.message ?? e}`); }
+  };
+
   // ── New folder ───────────────────────────────────────────────────────────
 
   const handleCreateFolder = async () => {
@@ -972,6 +1005,28 @@ export default function MediaManager({ initialPath, rootPath, title, config, set
             </button>
           </div>
         )}
+        {showCreateVms && (
+          <div className="mt-2 flex items-center gap-2">
+            <Layers className="w-4 h-4 text-indigo-500 flex-shrink-0" />
+            <input
+              value={vmsName}
+              onChange={e => setVmsName(e.target.value)}
+              onKeyDown={e => {
+                if (e.key === 'Enter') void handleCreateVms();
+                if (e.key === 'Escape') { setShowCreateVms(false); setVmsName(''); }
+              }}
+              placeholder="playlist.vms"
+              className="flex-1 px-2 py-1 text-sm border border-neutral-300 rounded"
+              autoFocus
+            />
+            <button onClick={() => void handleCreateVms()} className="px-3 py-1 text-sm bg-indigo-600 text-white rounded">
+              Create
+            </button>
+            <button onClick={() => { setShowCreateVms(false); setVmsName(''); }} className="p-1 rounded hover:bg-neutral-200">
+              <X className="w-4 h-4 text-neutral-500" />
+            </button>
+          </div>
+        )}
       </div>
 
       {/* ── Filter + sort bar ── */}
@@ -1017,6 +1072,11 @@ export default function MediaManager({ initialPath, rootPath, title, config, set
               <button onClick={moveSelected} className="px-2 py-0.5 rounded border border-blue-300 bg-white text-blue-700 hover:bg-blue-100 inline-flex items-center gap-1">
                 <Move className="w-3.5 h-3.5" /> Move
               </button>
+              {selCount > 1 && (
+                <button onClick={openCreateVms} className="px-2 py-0.5 rounded border border-blue-300 bg-white text-blue-700 hover:bg-blue-100 inline-flex items-center gap-1">
+                  <Layers className="w-3.5 h-3.5" /> Create VMS
+                </button>
+              )}
               <button onClick={() => void deleteSelected()} className="px-2 py-0.5 rounded border border-red-300 bg-white text-red-700 hover:bg-red-50 inline-flex items-center gap-1">
                 <Trash2 className="w-3.5 h-3.5" /> Delete
               </button>