feat(setup): Zeus lightning journey — fund-wallet step, IBD timer + finish-setup toast, channel suggestions

Every Lightning setup (Open a Shop, Accept Payments, Run a Lightning Node)
gains a guided path to a working channel:

- New "Fund Your Bitcoin Wallet" step, gated on the blockchain finishing
  its initial sync: while syncing it shows a live progress bar with a
  counting-down time-remaining estimate; once synced it shows the on-chain
  balance and a "Fund Wallet" button that opens the receive modal with a
  fresh address, QR, and the Zeus channel limits (min 150,000 / max
  1,500,000 sats) noted.
- When the sync finishes while a Lightning setup is mid-flight, a toast
  pops with a "Finish setup" link straight back to the wizard (toasts now
  support action links). If several setups are in flight, one is chosen —
  the shared steps complete the lightning part of any of them.
- Channel steps are Zeus-branded (logo + copy) and land on the Lightning
  Channels screen, which now carries an "Open a channel with Zeus" card
  that prefills the open-channel modal with the Olympus peer URI, 150k
  sats, and private-channel checked. "Get Zeus" links to zeusln.com.
- Setup completion now actually requires walking the manual steps (fund,
  open channel, configure) — previously any step whose app was installed
  was silently auto-ticked and running apps marked the whole goal done.
- Completion CTAs now go to the app you just set up ("Go to my shop
  (BTCPay)" etc.) instead of the generic services list; iframe apps open
  in the on-top app overlay.
- On-chain send modal gains a "Send all funds" sweep toggle, backed by
  LND's send_all on the backend (amount no longer required when sweeping).
- Demo/mock: bitcoin.getinfo now returns the block_height/sync_progress
  contract the UI reads and simulates a ~90s IBD ramp per visitor so the
  timer, toast, and fund flow can all be demoed live; channel list data
  fixed (status/channel_point/liquidity totals — the panel previously
  crashed on the missing status field); sendcoins supports send_all.

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

core/archipelago/src/api/rpc/lnd/wallet.rs

@@ -95,33 +95,54 @@ impl RpcHandler {
             .get("addr")
             .and_then(|v| v.as_str())
             .ok_or_else(|| anyhow::anyhow!("Missing 'addr' parameter"))?;
-        let amount = params
-            .get("amount")
-            .and_then(|v| v.as_i64())
-            .ok_or_else(|| anyhow::anyhow!("Missing 'amount' parameter (sats)"))?;
-
-        if amount < 546 {
-            return Err(anyhow::anyhow!(
-                "Amount must be at least 546 sats (dust limit)"
-            ));
-        }
-        if amount > 21_000_000 * 100_000_000 {
-            return Err(anyhow::anyhow!("Amount exceeds maximum Bitcoin supply"));
-        }
+        // send_all sweeps the entire confirmed on-chain balance (LND computes
+        // the amount after fees); amount is required otherwise.
+        let send_all = params
+            .get("send_all")
+            .and_then(|v| v.as_bool())
+            .unwrap_or(false);
+        let amount = if send_all {
+            None
+        } else {
+            let amount = params
+                .get("amount")
+                .and_then(|v| v.as_i64())
+                .ok_or_else(|| anyhow::anyhow!("Missing 'amount' parameter (sats)"))?;
+            if amount < 546 {
+                return Err(anyhow::anyhow!(
+                    "Amount must be at least 546 sats (dust limit)"
+                ));
+            }
+            if amount > 21_000_000 * 100_000_000 {
+                return Err(anyhow::anyhow!("Amount exceeds maximum Bitcoin supply"));
+            }
+            Some(amount)
+        };
 
         // Validate Bitcoin address format (basic: length and allowed chars)
         if addr.len() < 14 || addr.len() > 90 || !addr.chars().all(|c| c.is_ascii_alphanumeric()) {
             return Err(anyhow::anyhow!("Invalid Bitcoin address format"));
         }
 
-        info!(addr = addr, amount = amount, "Sending on-chain Bitcoin");
+        info!(
+            addr = addr,
+            amount = amount,
+            send_all = send_all,
+            "Sending on-chain Bitcoin"
+        );
 
         let (client, macaroon_hex) = self.lnd_client().await?;
 
-        let send_body = serde_json::json!({
-            "addr": addr,
-            "amount": amount.to_string(),
-        });
+        let send_body = match amount {
+            Some(amount) => serde_json::json!({
+                "addr": addr,
+                "amount": amount.to_string(),
+            }),
+            None => serde_json::json!({
+                "addr": addr,
+                "send_all": true,
+            }),
+        };
 
         let resp = client
             .post(format!("{LND_REST_BASE_URL}/v1/transactions"))