added a message on library card onnullcontent (#1576)

Author: peucastro

packages/uni_app/lib/view/home/widgets/library/library_home_card.dart

@@ -2,10 +2,12 @@ import 'package:flutter/material.dart';
 import 'package:uni/generated/l10n.dart';
 import 'package:uni/model/entities/library_occupation.dart';
 import 'package:uni/model/providers/lazy/library_occupation_provider.dart';
+import 'package:uni/view/common_widgets/icon_label.dart';
 import 'package:uni/view/home/widgets/generic_home_card.dart';
 import 'package:uni/view/home/widgets/library/library_card_shimmer.dart';
 import 'package:uni/view/lazy_consumer.dart';
 import 'package:uni_ui/cards/library_occupation_card.dart';
+import 'package:uni_ui/icons.dart';
 
 class LibraryHomeCard extends GenericHomecard {
   const LibraryHomeCard({
@@ -26,7 +28,19 @@ class LibraryHomeCard extends GenericHomecard {
             buildFloorOccupation(context, libraryOccupation.floors),
       ),
       hasContent: (libraryOccupation) => libraryOccupation.capacity > 0,
-      onNullContent: const CircularProgressIndicator(),
+      onNullContent: Center(
+        child: IconLabel(
+          icon: const Icon(
+            UniIcons.library,
+            size: 45,
+          ),
+          label: S.of(context).no_library_info,
+          labelTextStyle: TextStyle(
+            fontSize: 14,
+            color: Theme.of(context).colorScheme.primary,
+          ),
+        ),
+      ),
       contentLoadingWidget: const ShimmerLibraryHomeCard(),
     );
   }