fix: video/audio streaming instead of blob download

Videos and audio now stream directly via URL with auth token query
param instead of downloading entire file into a JS blob. Fixes
playback of large videos (170MB+ was timing out). Images still use
blob URLs. streamUrl() added to filebrowser client and cloud store.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

neode-ui/src/views/CloudFolder.vue

@@ -161,6 +161,7 @@
       :start-index="lightboxIndex"
       :show="lightboxIndex !== null"
       :fetch-blob-url="cloudStore.fetchBlobUrl"
+      :stream-url="cloudStore.streamUrl"
       @close="lightboxIndex = null"
     />
   </div>
@@ -358,8 +359,8 @@ async function handleDelete(path: string) {
   await cloudStore.deleteItem(path)
 }
 
-function handlePlay(path: string, name: string) {
-  const url = cloudStore.downloadUrl(path)
+async function handlePlay(path: string, name: string) {
+  const url = await cloudStore.streamUrl(path)
   audioPlayer.play(url, name)
 }