Integrate ProfileDropdown component, update layout to include user menu, and add Keycloak logout API route.

main-website/components/ProfileDropdown.tsx

@@ -0,0 +1,52 @@
+'use client'
+
+import {useState, useRef, useEffect} from 'react'
+import {useRouter} from 'next/navigation'
+
+export default function ProfileDropdown() {
+    const [open, setOpen] = useState(false)
+    const dropdownRef = useRef<HTMLDivElement>(null)
+    const router = useRouter()
+
+    useEffect(() => {
+        const handleClickOutside = (event: MouseEvent) => {
+            if (dropdownRef.current && !dropdownRef.current.contains(event.target as Node)) {
+                setOpen(false)
+            }
+        }
+
+        document.addEventListener('mousedown', handleClickOutside)
+        return () => document.removeEventListener('mousedown', handleClickOutside)
+    }, [])
+
+    const handleLogout = async () => {
+        try {
+            await fetch('/logout', {method: 'POST'})
+            router.push('/') // Or a dedicated post-logout landing page
+        } catch (e) {
+            console.error('Logout failed', e)
+        }
+    }
+
+    return (
+        <div className="relative" ref={dropdownRef}>
+            <button
+                onClick={() => setOpen(!open)}
+                className="text-white font-medium px-4 py-2 hover:bg-zinc-800 rounded"
+            >
+                Profil ▾
+            </button>
+
+            {open && (
+                <div className="absolute right-0 mt-2 w-40 bg-white shadow-lg rounded z-50">
+                    <button
+                        onClick={handleLogout}
+                        className="block w-full text-left px-4 py-2 text-sm text-zinc-800 hover:bg-zinc-100"
+                    >
+                        Logout
+                    </button>
+                </div>
+            )}
+        </div>
+    )
+}