Add NRC (Nostr Relay Connect) protocol and web UI (v0.48.9)

- Implement NIP-NRC protocol for remote relay access through public relay tunnel
- Add NRC bridge service with NIP-44 encrypted message tunneling
- Add NRC client library for applications
- Add session management with subscription tracking and expiry
- Add URI parsing for nostr+relayconnect:// scheme with secret and CAT auth
- Add NRC API endpoints for connection management (create/list/delete/get-uri)
- Add RelayConnectView.svelte component for managing NRC connections in web UI
- Add NRC database storage for connection secrets and labels
- Add NRC CLI commands (generate, list, revoke)
- Add support for Cashu Access Tokens (CAT) in NRC URIs
- Add ScopeNRC constant for Cashu token scope
- Add wasm build infrastructure and stub files

Files modified:
- app/config/config.go: NRC configuration options
- app/handle-nrc.go: New API handlers for NRC connections
- app/main.go: NRC bridge startup integration
- app/server.go: Register NRC API routes
- app/web/src/App.svelte: Add Relay Connect tab
- app/web/src/RelayConnectView.svelte: New NRC management component
- app/web/src/api.js: NRC API client functions
- main.go: NRC CLI command handlers
- pkg/bunker/acl_adapter.go: Add NRC scope mapping
- pkg/cashu/token/token.go: Add ScopeNRC constant
- pkg/database/nrc.go: NRC connection storage
- pkg/protocol/nrc/: New NRC protocol implementation
- docs/NIP-NRC.md: NIP specification document

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/server.go

@@ -36,6 +36,7 @@ import (
 	"next.orly.dev/pkg/bunker"
 	"next.orly.dev/pkg/cashu/issuer"
 	"next.orly.dev/pkg/cashu/verifier"
+	"next.orly.dev/pkg/protocol/nrc"
 	"next.orly.dev/pkg/ratelimit"
 	"next.orly.dev/pkg/spider"
 	"next.orly.dev/pkg/storage"
@@ -95,6 +96,9 @@ type Server struct {
 	CashuIssuer   *issuer.Issuer
 	CashuVerifier *verifier.Verifier
 
+	// NRC (Nostr Relay Connect) bridge for remote relay access
+	nrcBridge *nrc.Bridge
+
 	// Archive relay and storage management
 	archiveManager   *archive.Manager
 	accessTracker    *storage.AccessTracker
@@ -376,6 +380,11 @@ func (s *Server) UserInterface() {
 	if s.CashuIssuer != nil {
 		log.Printf("Cashu access token API enabled at /cashu")
 	}
+
+	// NRC (Nostr Relay Connect) management endpoints
+	s.mux.HandleFunc("/api/nrc/connections", s.handleNRCConnectionsRouter)
+	s.mux.HandleFunc("/api/nrc/connections/", s.handleNRCConnectionsRouter)
+	s.mux.HandleFunc("/api/nrc/config", s.handleNRCConfig)
 }
 
 // handleFavicon serves favicon.png as favicon.ico