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/mod.rs

@@ -256,6 +256,45 @@ impl ApiHandler {
         }
     }
 
+    /// CORS origin to echo for same-node app → backend calls (e.g. the LND
+    /// wallet UI, served on its own APP_PORTS port). Such apps share the node's
+    /// host but use a different port, so the strict allowlist (`host_ip`, no
+    /// port) rejects them and the browser gets no `Access-Control-Allow-Origin`
+    /// header ("blocked by CORS policy"). Reflect the Origin when its host
+    /// matches the request's own `Host` header — i.e. the app lives on the same
+    /// address the node is being reached by, which transparently covers the LAN
+    /// IP, the Tailscale IP, localhost, and the `.onion` address without needing
+    /// to enumerate them. Auth is still enforced by the session cookie; this
+    /// only authorizes the browser to *read* the reply. Returns "" (no echoed
+    /// origin) when there is no match.
+    fn app_cors_origin(&self, headers: &hyper::HeaderMap) -> String {
+        if let Some(origin) = self.validate_origin(headers) {
+            return origin;
+        }
+        let Some(origin) = headers.get("origin").and_then(|v| v.to_str().ok()) else {
+            return String::new();
+        };
+        // host portion (no scheme, no port) of an `scheme://host[:port]` value
+        let host_of = |s: &str| -> Option<String> {
+            let after_scheme = s.split_once("://").map(|(_, r)| r).unwrap_or(s);
+            let host_port = after_scheme.split('/').next().unwrap_or(after_scheme);
+            let host = host_port
+                .rsplit_once(':')
+                .map(|(h, _)| h)
+                .unwrap_or(host_port);
+            (!host.is_empty()).then(|| host.to_string())
+        };
+        let origin_host = host_of(origin);
+        let req_host = headers
+            .get(hyper::header::HOST)
+            .and_then(|v| v.to_str().ok())
+            .and_then(host_of);
+        match (origin_host, req_host) {
+            (Some(o), Some(r)) if o == r => origin.to_string(),
+            _ => String::new(),
+        }
+    }
+
     pub async fn handle_request(&self, req: Request<hyper::Body>) -> Result<Response<hyper::Body>> {
         let path = req.uri().path().to_string();
         let method = req.method().clone();
@@ -265,9 +304,10 @@ impl ApiHandler {
             let mut builder = Response::builder()
                 .status(StatusCode::NO_CONTENT)
                 .header("Vary", "Origin");
-            if let Some(origin) = self.validate_origin(req.headers()) {
+            let preflight_origin = self.app_cors_origin(req.headers());
+            if !preflight_origin.is_empty() {
                 builder = builder
-                    .header("Access-Control-Allow-Origin", &origin)
+                    .header("Access-Control-Allow-Origin", &preflight_origin)
                     .header("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
                     .header("Access-Control-Allow-Headers", "Content-Type, X-CSRF-Token")
                     .header("Access-Control-Allow-Credentials", "true");
@@ -448,7 +488,8 @@ impl ApiHandler {
             // No backend auth check here because the LND UI iframe fetches this
             // endpoint and the session cookie flow is validated at the nginx layer.
             (Method::GET, "/lnd-connect-info") => {
-                Self::handle_lnd_connect_info(self.rpc_handler.clone()).await
+                let origin = self.app_cors_origin(&headers);
+                Self::handle_lnd_connect_info(self.rpc_handler.clone(), &origin).await
             }
 
             // Container logs — requires session
@@ -465,8 +506,8 @@ impl ApiHandler {
                 if !self.is_authenticated(&headers).await {
                     return Ok(Self::unauthorized());
                 }
-                let origin = self.validate_origin(&headers).unwrap_or_default();
-                Self::handle_lnd_proxy(path, &origin).await
+                let origin = self.app_cors_origin(&headers);
+                Self::handle_lnd_proxy(self.rpc_handler.clone(), path, &origin).await
             }
 
             // DWN health — unauthenticated