feat: wire Spotify service into server

cmd/soundtouch-service/main.go

@@ -23,6 +23,7 @@ import (
 	"github.com/gesellix/bose-soundtouch/pkg/service/handlers"
 	"github.com/gesellix/bose-soundtouch/pkg/service/proxy"
 	"github.com/gesellix/bose-soundtouch/pkg/service/setup"
+	"github.com/gesellix/bose-soundtouch/pkg/service/spotify"
 	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/chi/v5/middleware"
 	"github.com/urfave/cli/v2"
@@ -228,6 +229,21 @@ func main() {
 			server.SetZeroconfEnabled(config.zeroconfEnabled)
 			server.SetBaseURL(config.baseURL)
 
+			if config.spotifyClientID != "" {
+				spotifyService := spotify.NewSpotifyService(
+					config.spotifyClientID,
+					config.spotifyClientSecret,
+					config.spotifyRedirectURI,
+					config.dataDir,
+				)
+				server.SetSpotifyService(spotifyService)
+				clientIDPrefix := config.spotifyClientID
+				if len(clientIDPrefix) > 8 {
+					clientIDPrefix = clientIDPrefix[:8]
+				}
+				log.Printf("Spotify service initialized (client ID: %s...)", clientIDPrefix)
+			}
+
 			// Load and set initial DNS discoveries
 			dnsDiscoveries, err := ds.LoadDNSDiscoveries()
 			if err == nil && len(dnsDiscoveries) > 0 {

pkg/service/handlers/server.go

@@ -13,6 +13,7 @@ import (
 	"github.com/gesellix/bose-soundtouch/pkg/service/datastore"
 	"github.com/gesellix/bose-soundtouch/pkg/service/proxy"
 	"github.com/gesellix/bose-soundtouch/pkg/service/setup"
+	"github.com/gesellix/bose-soundtouch/pkg/service/spotify"
 )
 
 // Server handles HTTP requests for the SoundTouch service.
@@ -47,6 +48,7 @@ type Server struct {
 	spotifyRedirectURI   string
 	zeroconfEnabled      bool
 	baseURL              string
+	spotifyService       *spotify.SpotifyService
 }
 
 // NewServer creates a new SoundTouch service server.
@@ -257,6 +259,14 @@ func (s *Server) SetBaseURL(baseURL string) {
 	s.baseURL = baseURL
 }
 
+// SetSpotifyService sets the Spotify OAuth service.
+func (s *Server) SetSpotifyService(ss *spotify.SpotifyService) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	s.spotifyService = ss
+}
+
 // GetRecordEnabled returns whether recording is enabled.
 func (s *Server) GetRecordEnabled() bool {
 	s.mu.RLock()