feat: Rework error handling, upgrade dio, fixed bugs

- Fix grey screen bug when adding labels from documnet upload
- Add more permission checks to conditionally show widgets

lib/features/document_search/view/sliver_search_bar.dart

@@ -1,32 +1,74 @@
 import 'package:flutter/material.dart';
-import 'package:paperless_mobile/core/delegate/customizable_sliver_persistent_header_delegate.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:hive/hive.dart';
+import 'package:hive_flutter/adapters.dart';
+import 'package:paperless_api/paperless_api.dart';
+import 'package:paperless_mobile/core/config/hive/hive_config.dart';
+import 'package:paperless_mobile/core/database/tables/local_user_account.dart';
 import 'package:paperless_mobile/features/document_search/view/document_search_bar.dart';
+import 'package:paperless_mobile/features/home/view/model/api_version.dart';
+import 'package:paperless_mobile/features/settings/view/manage_accounts_page.dart';
+import 'package:paperless_mobile/features/settings/view/widgets/global_settings_builder.dart';
+import 'package:paperless_mobile/features/settings/view/widgets/user_avatar.dart';
+import 'package:provider/provider.dart';
 
 class SliverSearchBar extends StatelessWidget {
   final bool floating;
   final bool pinned;
+  final String titleText;
   const SliverSearchBar({
     super.key,
     this.floating = false,
     this.pinned = false,
+    required this.titleText,
   });
 
   @override
   Widget build(BuildContext context) {
-    return SliverPadding(
-      padding: EdgeInsets.only(top: MediaQuery.of(context).padding.top),
-      sliver: SliverPersistentHeader(
-        floating: floating,
-        pinned: pinned,
-        delegate: CustomizableSliverPersistentHeaderDelegate(
-          minExtent: kToolbarHeight,
-          maxExtent: kToolbarHeight,
-          child: Container(
-            margin: const EdgeInsets.symmetric(horizontal: 16.0),
-            child: const DocumentSearchBar(),
-          ),
+    if (LocalUserAccount.current.paperlessUser.canViewDocuments) {
+      return SliverAppBar(
+        toolbarHeight: kToolbarHeight,
+        flexibleSpace: Container(
+          margin: const EdgeInsets.symmetric(horizontal: 16.0),
+          child: const DocumentSearchBar(),
         ),
-      ),
-    );
+        automaticallyImplyLeading: false,
+      );
+    } else {
+      return SliverAppBar(
+        title: Text(titleText),
+        actions: [
+          Padding(
+            padding: const EdgeInsets.only(right: 12.0),
+            child: IconButton(
+              padding: const EdgeInsets.all(6),
+              icon: GlobalSettingsBuilder(
+                builder: (context, settings) {
+                  return ValueListenableBuilder(
+                    valueListenable:
+                        Hive.box<LocalUserAccount>(HiveBoxes.localUserAccount)
+                            .listenable(),
+                    builder: (context, box, _) {
+                      final account = box.get(settings.currentLoggedInUser!)!;
+                      return UserAvatar(account: account);
+                    },
+                  );
+                },
+              ),
+              onPressed: () {
+                final apiVersion = context.read<ApiVersion>();
+                showDialog(
+                  context: context,
+                  builder: (context) => Provider.value(
+                    value: apiVersion,
+                    child: const ManageAccountsPage(),
+                  ),
+                );
+              },
+            ),
+          ),
+        ],
+      );
+    }
   }
 }