add WebSocket support for real-time delivery updates with JWT authentication and automatic reconnection

backend/cmd/api/main.go

@@ -10,6 +10,7 @@ import (
 	"github.com/chedius/delivery-tracker/internal/auth"
 	db "github.com/chedius/delivery-tracker/internal/db/sqlc"
 	"github.com/chedius/delivery-tracker/internal/delivery"
+	"github.com/chedius/delivery-tracker/internal/ws"
 	"github.com/gin-contrib/cors"
 	"github.com/gin-gonic/gin"
 	"github.com/jackc/pgx/v5/pgxpool"
@@ -42,7 +43,8 @@ func main() {
 
 	queries := db.New(pool)
 	_, authHandler := initAuth(queries)
-	h := delivery.NewHandler(queries)
+	hub := ws.NewHub()
+	h := delivery.NewHandler(queries, hub)
 
 	r := gin.Default()
 
@@ -61,6 +63,7 @@ func main() {
 
 	r.POST("/api/auth/register", authHandler.Register)
 	r.POST("/api/auth/login", authHandler.Login)
+	r.GET("/api/ws", ws.HandleWS(hub, []byte(os.Getenv("JWT_SECRET"))))
 
 	authorized := r.Group("/api")
 	authorized.Use(auth.AuthMiddleware([]byte(os.Getenv("JWT_SECRET"))))