Add Followed Tags panel to Explorer Screen

lib/screens/explore_screen.dart

@@ -18,6 +18,7 @@ import '../models/networking/paging_data.dart';
 import '../models/timeline_entry.dart';
 import '../riverpod_controllers/account_services.dart';
 import '../riverpod_controllers/entry_tree_item_services.dart';
+import '../riverpod_controllers/hashtag_service.dart';
 import '../riverpod_controllers/networking/friendica_trending_client_services.dart';
 import '../routes.dart';
 import '../utils/snackbar_builder.dart';
@@ -28,19 +29,24 @@ class ExploreScreen extends ConsumerWidget {
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     return DefaultTabController(
-      length: 2,
+      length: 3,
       child: Scaffold(
         drawer: const StandardAppDrawer(skipPopDismiss: false),
         appBar: AppBar(
           leading: const CurrentProfileButton(),
           title: const TabBar(
-            tabs: [Tab(icon: Icon(Icons.search)), Tab(icon: Icon(Icons.bolt))],
+            tabs: [
+              Tab(icon: Icon(Icons.search)),
+              Tab(icon: Icon(Icons.bolt)),
+              Tab(icon: Icon(Icons.tag)),
+            ],
           ),
         ),
         body: SafeArea(
           child: TabBarView(children: [
             const SearchPanel(),
             _TrendsPanel(),
+            const _FollowedTagsPanel(),
           ]),
         ),
         bottomNavigationBar: const AppBottomNavBar(
@@ -259,3 +265,46 @@ class _TrendingStatusesWidget extends ConsumerWidget {
     });
   }
 }
+
+class _FollowedTagsPanel extends ConsumerWidget {
+  const _FollowedTagsPanel();
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final profile = ref.watch(activeProfileProvider);
+    return SafeArea(
+        child: Column(children: [
+      Text(
+        'Followed Tags',
+        style: Theme.of(context).textTheme.headlineSmall,
+      ),
+      Expanded(
+        child: ResponsiveMaxWidth(
+            child: AsyncValueWidget(
+          ref.watch(followedTagsMapProvider(profile)),
+          valueBuilder: (vbContext, vbRef, result) => result.fold(
+            onSuccess: (followedTags) {
+              final tags = followedTags.keys.toList();
+              return ListView.builder(
+                  itemCount: tags.length,
+                  itemBuilder: (_, index) {
+                    final tag = tags[index];
+                    return ListTile(
+                      title: Text('#$tag'),
+                      onTap: () {
+                        vbContext.push('${ScreenPaths.tagView}/$tag');
+                      },
+                    );
+                  });
+            },
+            onError: (error) => Center(
+              child: Column(
+                children: [ErrorMessageWidget(message: error.message)],
+              ),
+            ),
+          ),
+        )),
+      ),
+    ]));
+  }
+}