implemented comprehensive accessibility (A11y) support across the app

lib/view/pages/more/roomplan/roomplan.dart

@@ -1,18 +1,24 @@
 import 'package:flutter/material.dart';
 import 'package:photo_view/photo_view.dart';
 
+import '../../../../widget/a11y/a11y_labels.dart';
+
 class Roomplan extends StatelessWidget {
   const Roomplan({super.key});
 
   @override
   Widget build(BuildContext context) => Scaffold(
     appBar: AppBar(title: const Text('Raumplan')),
-    body: PhotoView(
-      imageProvider: Image.asset('assets/img/raumplan.png').image,
-      minScale: 0.5,
-      maxScale: 2.0,
-      backgroundDecoration: BoxDecoration(
-        color: Theme.of(context).colorScheme.surface,
+    body: Semantics(
+      image: true,
+      label: A11yLabels.roomPlan,
+      child: PhotoView(
+        imageProvider: Image.asset('assets/img/raumplan.png').image,
+        minScale: 0.5,
+        maxScale: 2.0,
+        backgroundDecoration: BoxDecoration(
+          color: Theme.of(context).colorScheme.surface,
+        ),
       ),
     ),
   );