fixed bugs

lib/screens/medical_certificates_page.dart

@@ -50,9 +50,6 @@ class _MedicalCertificatesPageState extends State<MedicalCertificatesPage> {
   DateTime? expiryDate;
   bool uploading = false;
 
-  // ✅ questa pagina è "sezione account"
-  int bottomIndex = 2;
-
   @override
   void initState() {
     super.initState();
@@ -286,54 +283,6 @@ class _MedicalCertificatesPageState extends State<MedicalCertificatesPage> {
 
   bool _isPdfPath(String p) => p.toLowerCase().endsWith('.pdf');
 
-  Future<void> _goTo(Widget page) async {
-    if (!mounted) return;
-    Navigator.pushReplacement(context, MaterialPageRoute(builder: (_) => page));
-  }
-
-  void _handleBottomNav(int i) {
-    if (i == bottomIndex) return;
-    setState(() => bottomIndex = i);
-
-    if (i == 0) {
-      _goTo(
-        HomePage(
-          token: widget.token,
-          school: widget.school,
-          userFirstName: widget.userFirstName,
-        ),
-      );
-      return;
-    }
-
-    if (i == 1) {
-      _goTo(
-        LessonsPage(
-          token: widget.token,
-          school: widget.school,
-          userFirstName: widget.userFirstName,
-        ),
-      );
-      return;
-    }
-
-    if (i == 2) {
-      // siamo già in "area account", non facciamo nulla (o TODO)
-      return;
-    }
-
-    if (i == 3) {
-      _goTo(
-        MeditationPage(
-          token: widget.token,
-          school: widget.school,
-          userFirstName: widget.userFirstName,
-        ),
-      );
-      return;
-    }
-  }
-
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -359,10 +308,11 @@ class _MedicalCertificatesPageState extends State<MedicalCertificatesPage> {
         ],
       ),
 
-      // ✅ Bottom nav standard (come MeditationPage)
       bottomNavigationBar: AppBottomNav(
-        currentIndex: bottomIndex,
-        onTap: _handleBottomNav,
+        currentIndex: 2,
+        token: widget.token,
+        school: widget.school,
+        userFirstName: widget.userFirstName,
       ),
 
       body: YogibookBackground(