Pages Added + Provider Function Extented

Missing Pages were added (currently no content)

Provider changes the title to the right one

lib/providers/pageProvider.dart

@@ -1,16 +1,31 @@
 import 'package:flutter/material.dart';
 import 'package:mensaapp/pages/pageAmbiente.dart';
 import 'package:mensaapp/pages/pageEssen.dart';
+import 'package:mensaapp/pages/pageService.dart';
+import 'package:mensaapp/pages/pageAnmerkungen.dart';
+import 'package:mensaapp/pages/pageSpezielleErnaehrung.dart';
 
 class PageProvider extends ChangeNotifier {
   int selectedPage = 0;
-
+  String selectedPageTitle = "";
   List<Widget> pages = [
     const PageEssen(),
-    const PageAmbiente()
+    const PageAmbiente(),
+    const PageService(),
+    const PageAnmerkungen(),
+    const PageSpezielleErnaehrung()
+  ];
+
+  List<String> titleString = [
+    "Essen",
+    "Ambiente",
+    "Service",
+    "Anmerkungen",
+    "Spezielle Ernährung"
   ];
 
   void changePage(int index) {
+    selectedPageTitle = titleString[index];
     selectedPage = index;
     notifyListeners();
   }