feat(fips): connect to public mesh anchor over TCP + wire daemon updates

The whole fleet was silently never reaching the FIPS mesh: the default
public anchor was configured as fips.v0l.io:8668/udp, but the anchor only
answers on TCP/8443. Fix the default to 185.18.221.160:8443/tcp (IPv4
literal — the hostname resolves IPv6-first and the daemon binds v4-only,
which fails the handshake with EAFNOSUPPORT), and auto-seed it in
anchors::load() so every node dials it without operator action (removal
still persists). Proven live on .116: cold start → anchor_connected in
~400ms, anchor became mesh parent.

Wire fips::update::apply() against upstream GitHub releases (stable
channel only): resolve /releases/latest → SHA256-verify the .deb against
checksums-linux.txt → install → restart. dpkg runs via `systemd-run` to
escape archipelago's ProtectSystem=strict sandbox (else /var/lib/dpkg is
read-only), with --force-confold (archipelago manages /etc/fips conffiles)
and --force-downgrade (dev builds sort newer than the stable tag).
Validated live: .116 upgraded 0.3.0-dev -> stable v0.3.0.

Also: standalone fips-ui dashboard app (apps/fips-ui + docker/fips-ui,
static nginx proxying /rpc/v1 same-origin, copiable own-anchor address);
reserve UI port 8336; register fips/fips-ui as platform-managed. Includes
the Lightning wallet cross-origin (CORS) + LND proxy auth + nginx
self-healer fix so the wallet screen connects instead of "failed to fetch".

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

core/archipelago/src/api/handler/proxy.rs

@@ -99,33 +99,61 @@ impl ApiHandler {
 
     pub(super) async fn handle_lnd_connect_info(
         rpc: std::sync::Arc<super::super::rpc::RpcHandler>,
+        cors_origin: &str,
     ) -> Result<Response<hyper::Body>> {
+        // The LND wallet UI is served on its own APP_PORTS origin and fetches
+        // this cross-origin, so it needs the CORS headers echoed back.
+        let cors = |builder: hyper::http::response::Builder| {
+            builder
+                .header("Access-Control-Allow-Origin", cors_origin)
+                .header("Access-Control-Allow-Credentials", "true")
+                .header("Vary", "Origin")
+        };
         match rpc.handle_lnd_connect_info().await {
             Ok(val) => {
                 let body = serde_json::to_vec(&val).unwrap_or_default();
-                Ok(build_response(
-                    StatusCode::OK,
-                    "application/json",
-                    hyper::Body::from(body),
-                ))
+                Ok(cors(
+                    Response::builder()
+                        .status(StatusCode::OK)
+                        .header("Content-Type", "application/json"),
+                )
+                .body(hyper::Body::from(body))
+                .unwrap_or_else(|_| Response::new(hyper::Body::from("{}"))))
             }
-            Err(e) => Ok(Response::builder()
-                .status(StatusCode::INTERNAL_SERVER_ERROR)
-                .header("Content-Type", "application/json")
-                .body(hyper::Body::from(
-                    serde_json::json!({"error": e.to_string()}).to_string(),
-                ))
-                .unwrap()),
+            Err(e) => Ok(cors(
+                Response::builder()
+                    .status(StatusCode::INTERNAL_SERVER_ERROR)
+                    .header("Content-Type", "application/json"),
+            )
+            .body(hyper::Body::from(
+                serde_json::json!({"error": e.to_string()}).to_string(),
+            ))
+            .unwrap()),
         }
     }
 
     pub(super) async fn handle_lnd_proxy(
+        rpc: Arc<RpcHandler>,
         path: &str,
         cors_origin: &str,
     ) -> Result<Response<hyper::Body>> {
         let suffix = path.strip_prefix("/proxy/lnd").unwrap_or("/");
         let url = format!("{LND_REST_BASE_URL}{suffix}");
-        match reqwest::get(&url).await {
+        // LND REST serves a self-signed cert and requires the admin macaroon.
+        // A bare reqwest::get() uses the default client, which rejects the
+        // self-signed cert (TLS verify error -> 502 "failing to fetch") and
+        // sends no macaroon. Use the shared authenticated client instead — the
+        // same one lnd.getinfo and the wallet RPCs use.
+        let request = match rpc.lnd_client().await {
+            Ok((client, macaroon_hex)) => client
+                .get(&url)
+                .header("Grpc-Metadata-macaroon", &macaroon_hex)
+                .send()
+                .await
+                .map_err(anyhow::Error::from),
+            Err(e) => Err(e),
+        };
+        match request {
             Ok(resp) => {
                 let status = resp.status().as_u16();
                 let headers = resp.headers().clone();