feat(cloud): Folders/My Files/Peer Files polish + readable file rows

- Top-level Cloud tabs get their own orange-tinted switcher (clearly
  distinct from the category pills); full-width thirds on mobile
- 'All Files' tab renamed Folders; categories only show on the file-list
  tabs (My Files / Peer Files / search)
- My Files is now a flat list of every own file rendered with FileCard —
  real actions (share/download/delete) and clicking opens the FILE
  (media lightbox incl. audio, downloads for documents), never a folder;
  own search results get the same treatment
- Folder list rows get card backgrounds (readable over the wallpaper),
  same info as before

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

neode-ui/src/components/cloud/FileCard.vue

@@ -110,7 +110,7 @@ const imgFailed = ref(false)
 
 const ext = computed(() => props.item.extension)
 const isDir = computed(() => props.item.isDir)
-const { isImage, isVideo, iconPaths, iconColor, badgeLabel, badgeClass } = useFileType(ext, isDir)
+const { isImage, isVideo, isAudio, iconPaths, iconColor, badgeLabel, badgeClass } = useFileType(ext, isDir)
 
 const thumbnailUrl = computed(() => {
   if (!isImage.value || imgFailed.value) return null
@@ -122,8 +122,12 @@ const downloadHref = computed(() => cloudStore.downloadUrl(props.item.path))
 function handleClick() {
   if (props.item.isDir) {
     emit('navigate', props.item.path)
-  } else if (isImage.value || isVideo.value) {
+  } else if (isImage.value || isVideo.value || isAudio.value) {
+    // MediaLightbox handles all three media kinds.
     emit('preview', props.item.path)
+  } else {
+    // Non-media files open by downloading — a click should always act on the file.
+    window.location.href = downloadHref.value
   }
 }
 </script>