feat(websocket): integrate WebSocket support and refactor SSE handling

- Added WebSocket support by introducing a new WSHandler and related infrastructure.
- Replaced SSE implementations with WebSocket equivalents across message and QR code handlers.
- Updated service and repository layers to utilize WebSocket for real-time messaging.
- Removed obsolete SSE hub and related code, streamlining the application for WebSocket usage.
- Enhanced router to include WebSocket endpoints for real-time communication.

internal/wire/infrastructure.go

@@ -12,7 +12,7 @@ import (
 	"carrot_bbs/internal/pkg/openai"
 	"carrot_bbs/internal/pkg/redis"
 	"carrot_bbs/internal/pkg/s3"
-	"carrot_bbs/internal/pkg/sse"
+	"carrot_bbs/internal/pkg/ws"
 	"carrot_bbs/internal/repository"
 	"carrot_bbs/internal/service"
 
@@ -44,8 +44,8 @@ var InfrastructureSet = wire.NewSet(
 	ProvideBuiltinHooks,
 	ProvideModerationHooks,
 
-	// SSE Hub
-	ProvideSSEHub,
+	// WebSocket Hub
+	ProvideWSHub,
 
 	// 外部服务客户端
 	ProvideOpenAIClient,
@@ -156,9 +156,9 @@ func ProvideModerationHooks(
 	return moderationHooks
 }
 
-// ProvideSSEHub 提供 SSE Hub
-func ProvideSSEHub() *sse.Hub {
-	return sse.NewHub()
+// ProvideWSHub 提供 WebSocket Hub
+func ProvideWSHub() *ws.Hub {
+	return ws.NewHub()
 }
 
 // ProvideOpenAIClient 提供 OpenAI 客户端