feat(ws): WebSocket 核心模块（Hub + Client + PubSub + Handler）

- pkg/ws/message.go: 统一消息协议（Message/Response/PushMessage）
- pkg/ws/hub.go: Hub 连接管理（注册/注销/按 userID 查找/在线计数）
- pkg/ws/client.go: 客户端连接封装（readPump/writePump/心跳 30s）
- pkg/ws/pubsub.go: Redis Pub/Sub 消息路由（按用户频道发布/订阅）
- app/ws/handler.go: WebSocket 升级处理（JWT 认证 + 消息分发）
- app/ws/router.go: GET /ws 路由注册
- app/ws/provider.go: Wire Provider Set
- 更新 provider/router 集成 WebSocket 模块

Made-with: Cursor

backend/go-service/app/provider/provider.go

@@ -6,8 +6,10 @@ import (
 	adminController "github.com/echochat/backend/app/admin/controller"
 	authController "github.com/echochat/backend/app/auth/controller"
 	"github.com/echochat/backend/app/auth/service"
+	wsApp "github.com/echochat/backend/app/ws"
 	"github.com/echochat/backend/config"
 	"github.com/echochat/backend/pkg/db"
+	"github.com/echochat/backend/pkg/ws"
 	"github.com/google/wire"
 	"github.com/redis/go-redis/v9"
 	"gorm.io/gorm"
@@ -22,6 +24,9 @@ type App struct {
 	AuthController        *authController.AuthController              // 前台认证控制器
 	AdminAuthController   *authController.AdminAuthController         // 后台认证控制器
 	UserManageController  *adminController.UserManageController       // 管理端用户管理控制器
+	WSHandler             *wsApp.Handler                              // WebSocket 连接处理器
+	Hub                   *ws.Hub                                     // WebSocket Hub 连接管理
+	PubSub                *ws.PubSub                                  // Redis Pub/Sub 消息路由
 }
 
 // NewApp 创建应用实例
@@ -33,6 +38,9 @@ func NewApp(
 	authCtrl *authController.AuthController,
 	adminAuthCtrl *authController.AdminAuthController,
 	userManageCtrl *adminController.UserManageController,
+	wsHandler *wsApp.Handler,
+	hub *ws.Hub,
+	pubsub *ws.PubSub,
 ) *App {
 	return &App{
 		Config:                cfg,
@@ -42,6 +50,9 @@ func NewApp(
 		AuthController:        authCtrl,
 		AdminAuthController:   adminAuthCtrl,
 		UserManageController:  userManageCtrl,
+		WSHandler:             wsHandler,
+		Hub:                   hub,
+		PubSub:                pubsub,
 	}
 }
 

backend/go-service/app/provider/wire.go

@@ -6,6 +6,7 @@ package provider
 import (
 	"github.com/echochat/backend/app/admin"
 	"github.com/echochat/backend/app/auth"
+	wsApp "github.com/echochat/backend/app/ws"
 	"github.com/echochat/backend/config"
 	"github.com/google/wire"
 )
@@ -16,6 +17,7 @@ func InitializeApp(cfg *config.Config) (*App, error) {
 		InfraSet,
 		auth.AuthSet,
 		admin.AdminSet,
+		wsApp.WSSet,
 	)
 	return nil, nil
 }

backend/go-service/app/provider/wire_gen.go

@@ -7,12 +7,13 @@
 package provider
 
 import (
-	adminController "github.com/echochat/backend/app/admin/controller"
-	adminDAO "github.com/echochat/backend/app/admin/dao"
-	adminService "github.com/echochat/backend/app/admin/service"
+	controller2 "github.com/echochat/backend/app/admin/controller"
+	dao2 "github.com/echochat/backend/app/admin/dao"
+	service2 "github.com/echochat/backend/app/admin/service"
 	"github.com/echochat/backend/app/auth/controller"
 	"github.com/echochat/backend/app/auth/dao"
 	"github.com/echochat/backend/app/auth/service"
+	"github.com/echochat/backend/app/ws"
 	"github.com/echochat/backend/config"
 	"github.com/echochat/backend/pkg/db"
 )
@@ -38,9 +39,12 @@ func InitializeApp(cfg *config.Config) (*App, error) {
 	authService := service.NewAuthService(userDAO, roleDAO, jwtConfig, tokenStore)
 	authController := controller.NewAuthController(authService)
 	adminAuthController := controller.NewAdminAuthController(authService)
-	userManageDAO := adminDAO.NewUserManageDAO(gormDB)
-	userManageService := adminService.NewUserManageService(userManageDAO, userDAO, roleDAO)
-	userManageController := adminController.NewUserManageController(userManageService)
-	app := NewApp(cfg, gormDB, client, authService, authController, adminAuthController, userManageController)
+	userManageDAO := dao2.NewUserManageDAO(gormDB)
+	userManageService := service2.NewUserManageService(userManageDAO, userDAO, roleDAO)
+	userManageController := controller2.NewUserManageController(userManageService)
+	hub := ws.ProvideHub()
+	pubSub := ws.ProvidePubSub(client, hub)
+	handler := ws.ProvideWSHandler(hub, pubSub, jwtConfig)
+	app := NewApp(cfg, gormDB, client, authService, authController, adminAuthController, userManageController, handler, hub, pubSub)
 	return app, nil
 }