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/handler.go

@@ -2,7 +2,7 @@ package wire
 
 import (
 	"carrot_bbs/internal/handler"
-	"carrot_bbs/internal/pkg/sse"
+	"carrot_bbs/internal/pkg/ws"
 	"carrot_bbs/internal/service"
 
 	"github.com/google/wire"
@@ -35,6 +35,7 @@ var HandlerSet = wire.NewSet(
 	ProvideSystemMessageHandler,
 	ProvideGroupHandler,
 	ProvideScheduleHandler,
+	ProvideWSHandler,
 )
 
 // ProvideUserHandler 提供用户处理器
@@ -91,9 +92,9 @@ func ProvideMessageHandler(
 	messageService *service.MessageService,
 	userService service.UserService,
 	groupService service.GroupService,
-	sseHub *sse.Hub,
+	wsHub *ws.Hub,
 ) *handler.MessageHandler {
-	return handler.NewMessageHandler(chatService, messageService, userService, groupService, sseHub)
+	return handler.NewMessageHandler(chatService, messageService, userService, groupService, wsHub)
 }
 
 // ProvideSystemMessageHandler 提供系统消息处理器
@@ -118,3 +119,13 @@ func ProvideScheduleHandler(
 ) *handler.ScheduleHandler {
 	return handler.NewScheduleHandler(scheduleService, scheduleSyncService)
 }
+
+// ProvideWSHandler 提供WebSocket处理器
+func ProvideWSHandler(
+	wsHub *ws.Hub,
+	chatService service.ChatService,
+	groupService service.GroupService,
+	jwtService *service.JWTService,
+) *handler.WSHandler {
+	return handler.NewWSHandler(wsHub, chatService, groupService, jwtService)
+}