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/bitcoin_status.rs

@@ -22,11 +22,23 @@ use tracing::{debug, warn};
 const CACHE_REFRESH_SECS: u64 = 5;
 const CACHE_ERROR_BACKOFF_SECS: u64 = 5;
 
+// Grace window before a failing poll marks the snapshot "stale" for the UI.
+// On a busy / swap-thrashing node (e.g. .198) getblockchaininfo intermittently
+// exceeds the RPC timeout, so a single missed poll is normal and must NOT flip
+// the UI to "reconnecting…". Only after the cached snapshot is genuinely old —
+// several polls failed in a row — do we surface the banner.
+const STALE_GRACE_MS: u64 = 20_000;
+
 #[derive(Debug, Clone, Serialize)]
 pub struct BitcoinNodeStatus {
     pub ok: bool,
     pub stale: bool,
     pub updated_at_ms: u64,
+    // Server-computed age of the snapshot, filled in at serve time. The browser
+    // must not derive this itself (Date.now() - updated_at_ms) because that
+    // compares the browser clock against this node's clock — any skew made a
+    // fresh snapshot look stale and the "reconnecting…" banner never cleared.
+    pub age_ms: u64,
     pub error: Option<String>,
     pub blockchain_info: Option<serde_json::Value>,
     pub network_info: Option<serde_json::Value>,
@@ -40,6 +52,7 @@ impl Default for BitcoinNodeStatus {
             ok: false,
             stale: false,
             updated_at_ms: 0,
+            age_ms: 0,
             error: Some("Connecting to Bitcoin node...".to_string()),
             blockchain_info: None,
             network_info: None,
@@ -128,7 +141,11 @@ pub fn spawn_status_cache() {
 
                     if cached.blockchain_info.is_some() {
                         cached.ok = false;
-                        cached.stale = true;
+                        // Only flip to "stale" once the last good snapshot is older
+                        // than the grace window. A brief RPC gap on a busy node keeps
+                        // showing last-known state silently instead of a banner flicker.
+                        let snapshot_age_ms = now_ms().saturating_sub(cached.updated_at_ms);
+                        cached.stale = snapshot_age_ms > STALE_GRACE_MS;
                         cached.error = Some(friendly_transient_error(true, &err_msg));
                     } else {
                         *cached = BitcoinNodeStatus {
@@ -148,12 +165,22 @@ pub fn spawn_status_cache() {
 }
 
 pub async fn get_bitcoin_status() -> BitcoinNodeStatus {
-    cache().read().await.clone()
+    let mut status = cache().read().await.clone();
+    // Compute age here (server clock only) so the browser never has to subtract
+    // across clocks. A successful snapshot serves age_ms ≈ 0 → the UI clears the
+    // "reconnecting…" banner on its very next poll regardless of browser-clock skew.
+    if status.updated_at_ms > 0 {
+        status.age_ms = now_ms().saturating_sub(status.updated_at_ms);
+    }
+    status
 }
 
 async fn fetch_bitcoin_status() -> Result<BitcoinNodeStatus> {
+    // 12s (not 8s): on a swap-thrashing node getblockchaininfo can answer slowly
+    // but correctly; too tight a timeout turned working-but-slow polls into
+    // failures and tripped the "reconnecting…" banner. Stays under STALE_GRACE_MS.
     let client = reqwest::Client::builder()
-        .timeout(Duration::from_secs(8))
+        .timeout(Duration::from_secs(12))
         .build()
         .context("build Bitcoin status HTTP client")?;
 
@@ -172,6 +199,7 @@ async fn fetch_bitcoin_status() -> Result<BitcoinNodeStatus> {
         ok: true,
         stale: false,
         updated_at_ms: now_ms(),
+        age_ms: 0,
         error: None,
         blockchain_info: Some(blockchain_info),
         network_info: network_info.ok(),