feat(ui): mobile mesh tabs, AIUI-style audio player, cloud grid + map fixes

UI (this session):
- Global audio player now scales the whole interface into the space above it
  on desktop (sidebar + main) and docks directly above the tab bar on mobile;
  it stays visible while navigating.
- Mesh mobile redesign: floating Chat / BTC / Dead Man / AI / Map tab strip
  with a single fixed, internally-scrolling pane (page no longer scrolls);
  tabs hide while a conversation is open; floating back button; collapsible
  Device panel (starts collapsed); keyboard-aware conversation sizing via
  VisualViewport so the chat sits just above the keyboard.
- Cloud file grid: uniform 4/3 card heights (folders + images match).
- Swipe left/right switches tabs on the Apps and Web5 screens.
- Map tool fills its pane (no bottom gap); fix skewed Share Location toggle
  on mobile (global min-height rule was deforming the switch).
- Trim redundant helper copy from the mesh AI tab.

Also bundles pre-existing in-progress work that was already in the tree:
mesh listener/session + wallet + container + bitcoin-status backend changes,
docker UI updates, and assorted other UI tweaks.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

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

@@ -152,11 +152,10 @@ const downloadHref = computed(() => cloudStore.downloadUrl(props.item.path))
 const { playing: audioPlaying, currentSrc } = useAudioPlayer()
 const isCurrentlyPlaying = computed(() => audioPlaying.value && currentSrc.value === downloadHref.value)
 
-const aspectClass = computed(() => {
-  if (isImage.value || isVideo.value) return 'aspect-square'
-  if (category.value === 'document' || category.value === 'folder') return 'aspect-[4/3]'
-  return 'aspect-square'
-})
+// Uniform card cover ratio across every file type so folders, images, videos
+// and documents all render at the same height in the grid (previously images/
+// videos were square while folders were 4/3, giving a ragged, mismatched grid).
+const aspectClass = computed(() => 'aspect-[4/3]')
 
 const coverBg = computed(() => {
   if (props.item.isDir) return 'bg-amber-500/10'