Merge pull request 'start nincs' (#86) from navbar+aboutű into main

Reviewed-on: #86
HALLOD UGYES VAGY :)

SerpentRace_Frontend/src/components/Landingpage/PlayMenu.jsx

@@ -1,4 +1,5 @@
 import React, { useState } from "react"
+import { useNavigate } from "react-router-dom"
 import LogoCard from "../../assets/pictures/LogoCard.jsx"
 import logoImg from "../../assets/pictures/Logo.png" // <-- EZT ADD HOZZÁ
 import ButtonDark from "../Buttons/ButtonDark.jsx"
@@ -12,6 +13,7 @@ const PlayMenu = ({ onJoinGame, onCreateGame, user, setUser }) => {
 
   // gyors username kiolvasás (ha a parent objektum user={ { name: ... } } küldi)
   const username = user?.name ?? null
+  const navigate = useNavigate()
 
   const handleJoin = () => {
     if (!joinCode.trim()) {
@@ -23,7 +25,22 @@ const PlayMenu = ({ onJoinGame, onCreateGame, user, setUser }) => {
   }
 
   const handleCreate = () => {
-    onCreateGame()
+    // determine the name we will pass: logged in username or guestName
+    const nameToSend = username ?? guestName?.trim()
+
+    if (!nameToSend) {
+      setGuestError("Adj meg egy nevet, vagy jelentkezz be!")
+      return
+    }
+
+    // if parent provided a setter, set guest as current user (optional)
+    if (!username && setUser) {
+      setUser({ name: nameToSend })
+    }
+
+    // Do NOT call onCreateGame here to avoid any alert side-effects from parent.
+    // Just navigate to choose deck and pass username via location.state
+    navigate("/choosedeck", { state: { username: nameToSend } })
   }
 
   // egyszerű segéd a kezdobetűk kinyerésére