feat: Add saved views to landing page

lib/features/saved_view_details/cubit/saved_view_details_cubit.dart

@@ -29,6 +29,7 @@ class SavedViewDetailsCubit extends Cubit<SavedViewDetailsState>
     this._labelRepository,
     this._userState, {
     required this.savedView,
+    int initialCount = 25,
   }) : super(
           SavedViewDetailsState(
             correspondents: _labelRepository.state.correspondents,
@@ -56,7 +57,12 @@ class SavedViewDetailsCubit extends Cubit<SavedViewDetailsState>
         }
       },
     );
-    updateFilter(filter: savedView.toDocumentFilter());
+    updateFilter(
+      filter: savedView.toDocumentFilter().copyWith(
+            page: 1,
+            pageSize: initialCount,
+          ),
+    );
   }
 
   void setViewType(ViewType viewType) {

lib/features/saved_view_details/cubit/saved_view_preview_cubit.dart

@@ -0,0 +1,28 @@
+import 'package:bloc/bloc.dart';
+import 'package:freezed_annotation/freezed_annotation.dart';
+import 'package:paperless_api/paperless_api.dart';
+
+part 'saved_view_preview_state.dart';
+part 'saved_view_preview_cubit.freezed.dart';
+
+class SavedViewPreviewCubit extends Cubit<SavedViewPreviewState> {
+  final PaperlessDocumentsApi _api;
+  final SavedView view;
+  SavedViewPreviewCubit(this._api, this.view)
+      : super(const SavedViewPreviewState.initial());
+
+  Future<void> initialize() async {
+    emit(const SavedViewPreviewState.loading());
+    try {
+      final documents = await _api.findAll(
+        view.toDocumentFilter().copyWith(
+              page: 1,
+              pageSize: 5,
+            ),
+      );
+      emit(SavedViewPreviewState.loaded(documents: documents.results));
+    } catch (e) {
+      emit(const SavedViewPreviewState.error());
+    }
+  }
+}

lib/features/saved_view_details/cubit/saved_view_preview_state.dart

@@ -0,0 +1,11 @@
+part of 'saved_view_preview_cubit.dart';
+
+@freezed
+class SavedViewPreviewState with _$SavedViewPreviewState {
+  const factory SavedViewPreviewState.initial() = _Initial;
+  const factory SavedViewPreviewState.loading() = _Loading;
+  const factory SavedViewPreviewState.loaded({
+    required List<DocumentModel> documents,
+  }) = _Loaded;
+  const factory SavedViewPreviewState.error() = _Error;
+}

lib/features/saved_view_details/view/saved_view_details_preview.dart

@@ -0,0 +1,84 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:paperless_api/paperless_api.dart';
+import 'package:paperless_mobile/features/documents/cubit/documents_cubit.dart';
+import 'package:paperless_mobile/features/documents/view/widgets/adaptive_documents_view.dart';
+import 'package:paperless_mobile/features/documents/view/widgets/items/document_list_item.dart';
+import 'package:paperless_mobile/features/landing/view/widgets/expansion_card.dart';
+import 'package:paperless_mobile/features/saved_view_details/cubit/saved_view_details_cubit.dart';
+import 'package:paperless_mobile/features/saved_view_details/cubit/saved_view_preview_cubit.dart';
+import 'package:paperless_mobile/routes/typed/branches/documents_route.dart';
+import 'package:provider/provider.dart';
+
+class SavedViewDetailsPreview extends StatelessWidget {
+  final SavedView savedView;
+  const SavedViewDetailsPreview({
+    super.key,
+    required this.savedView,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Provider(
+      create: (context) =>
+          SavedViewPreviewCubit(context.read(), savedView)..initialize(),
+      builder: (context, child) {
+        return ExpansionCard(
+          title: Text(savedView.name),
+          content: BlocBuilder<SavedViewPreviewCubit, SavedViewPreviewState>(
+            builder: (context, state) {
+              return Column(
+                children: [
+                  state.maybeWhen(
+                    loaded: (documents) {
+                      return Column(
+                        children: [
+                          for (final document in documents)
+                            DocumentListItem(
+                              document: document,
+                              isLabelClickable: false,
+                              isSelected: false,
+                              isSelectionActive: false,
+                              onTap: (document) {
+                                DocumentDetailsRoute($extra: document)
+                                    .push(context);
+                              },
+                            ),
+                          Row(
+                            mainAxisAlignment: MainAxisAlignment.spaceAround,
+                            children: [
+                              TextButton(
+                                child: Text("Show more"),
+                                onPressed: documents.length >= 5 ? () {} : null,
+                              ),
+                              TextButton.icon(
+                                icon: Icon(Icons.open_in_new),
+                                label: Text("Show in documents"),
+                                onPressed: () {
+                                  context.read<DocumentsCubit>().updateFilter(
+                                        filter: savedView.toDocumentFilter(),
+                                      );
+                                  DocumentsRoute().go(context);
+                                },
+                              ),
+                            ],
+                          ),
+                        ],
+                      );
+                    },
+                    error: () =>
+                        const Text("Error loading preview"), //TODO: INTL
+                    orElse: () => const Padding(
+                      padding: EdgeInsets.all(8.0),
+                      child: Center(child: CircularProgressIndicator()),
+                    ),
+                  ),
+                ],
+              );
+            },
+          ),
+        );
+      },
+    );
+  }
+}