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>

core/archipelago/src/container/companion.rs

@@ -102,8 +102,15 @@ const LND_UI: &[CompanionSpec] = &[CompanionSpec {
     ],
     pre_start: None,
     bind_mounts: &[],
-    ports: &[(18083, 80)],
-    host_network: false,
+    // Host networking so the app's own nginx can proxy the archipelago backend
+    // same-origin (127.0.0.1:5678), exactly like fips-ui / electrs-ui. The
+    // previous bridge + 18083→80 mapping forced the browser to fetch the
+    // backend cross-origin from the app's port, which depended on the host
+    // nginx route + a CORS Origin/Host match and broke on http-only nodes
+    // (e.g. .116: blank fields, QR "failed to fetch"). The app's nginx now
+    // listens on 18083 directly (NOT 80 — that would collide with host nginx).
+    ports: &[],
+    host_network: true,
 }];
 
 const ELECTRS_UI: &[CompanionSpec] = &[CompanionSpec {
@@ -439,12 +446,15 @@ mod tests {
     }
 
     #[test]
-    fn lnd_ui_uses_port_mapping_not_host_port_80() {
+    fn lnd_ui_uses_host_network_for_same_origin_backend_proxy() {
+        // lnd-ui is host-networked (its nginx listens on 18083 directly) so the
+        // app can proxy the archipelago backend same-origin instead of fetching
+        // it cross-origin from its app port — see the spec comment for why.
         let spec = &LND_UI[0];
         let u = build_unit(spec, "localhost/lnd-ui:latest");
         assert_eq!(u.name, "archy-lnd-ui");
-        assert!(matches!(u.network, NetworkMode::Bridge(ref n) if n == "bridge"));
-        assert_eq!(u.ports, vec![(18083, 80, "tcp".into())]);
+        assert!(matches!(u.network, NetworkMode::Host));
+        assert!(u.ports.is_empty());
     }
 
     #[test]