Phase 2 backend: LiveKit voice integration

Backend:
- internal/voice/client.go: LiveKit token generation, room management, participant listing
- internal/voice/handlers.go: POST /voice/token, GET /voice/rooms/{roomID}/participants
- internal/gateway/events.go: added VOICE_JOIN, VOICE_LEAVE, VOICE_MUTE, VOICE_DEAFEN events
- cmd/server/main.go: wired voice client and routes under /api/v1/voice
- Docker: livekit.yaml config verified

Frontend deps:
- Added livekit-client and @livekit/components-react packages

cmd/server/main.go

@@ -17,6 +17,7 @@ import (
 	"git.dustin.coffee/hobokenchicken/dumpsterChat/internal/middleware"
 	"git.dustin.coffee/hobokenchicken/dumpsterChat/internal/server"
 	"git.dustin.coffee/hobokenchicken/dumpsterChat/internal/upload"
+	"git.dustin.coffee/hobokenchicken/dumpsterChat/internal/voice"
 	"github.com/go-chi/chi/v5"
 	chimw "github.com/go-chi/chi/v5/middleware"
 )
@@ -54,6 +55,12 @@ func main() {
 		logger.Warn("upload handler not available", "error", err)
 	}
 
+	// Voice client (LiveKit)
+	voiceClient := voice.NewClient(cfg.LiveKit.APIKey, cfg.LiveKit.Secret, cfg.LiveKit.URL)
+	if voiceClient == nil {
+		logger.Warn("voice client not configured (missing LIVEKIT_API_KEY/SECRET)")
+	}
+
 	// Auth handler
 	authHandler := auth.NewHandler(database.DB, cfg)
 
@@ -134,7 +141,14 @@ func main() {
 			if uploadHandler != nil {
 				r.Post("/upload", uploadHandler.Upload)
 			}
-		})
+
+			// Voice
+			if voiceClient != nil {
+				r.Route("/voice", func(r chi.Router) {
+					voice.NewHandler(database.DB, voiceClient, hub).RegisterRoutes(r)
+				})
+			}
+			})
 	})
 
 	// File serving (public, for viewing uploaded files)