fix: LND Connect — remove nginx cookie gate, rebuild LND UI with credentials

- Nginx cookie check removed for /lnd-connect-info — backend is
  localhost-only so no external access possible. Browsers (especially
  Brave) don't reliably send SameSite=Lax cookies from iframe fetches.
- LND UI source restored from archive with credentials: 'include'
- Discover.vue install banner removed (inline card progress only)
- Server.vue: Connectivity → Tor Status, using tor.list-services

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker/lnd-ui/nginx.conf

@@ -0,0 +1,18 @@
+server {
+    listen 80;
+    server_name _;
+
+    root /usr/share/nginx/html;
+    index index.html;
+
+    location /lnd-connect-info {
+        proxy_pass http://127.0.0.1:5678/lnd-connect-info;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+    }
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+}