add Not yet implemented warning to discover / directory page

lib/helpers/extensions/show_leave_room_sheet.dart

@@ -18,9 +18,8 @@ extension ShowLeaveRoomSheet on BuildContext {
             ),
             TextButton(
               onPressed: () {
-                final client = ProviderScope.containerOf(
-                  context,
-                ).read(ClientController.provider.notifier);
+                final client = ProviderScope.containerOf(context)
+                    .read(ClientController.provider.notifier);
                 context.withProgressSnackbar(
                   "Leaving $name...",
                   () => client.leaveRoom(roomId),

lib/models/room_summary.dart

@@ -3,6 +3,7 @@ import "package:nexus/models/content/create.dart";
 import "package:nexus/models/content/membership.dart";
 import "package:nexus/models/join_rule.dart";
 import "package:nexus/models/membership_status.dart";
+import "package:nexus/models/room_metadata.dart";
 
 part "room_summary.freezed.dart";
 part "room_summary.g.dart";
@@ -40,6 +41,16 @@ class const RoomSummary({
   /// Whether this is an invite to a direct message.
   @JsonKey(includeFromJson: false) final bool isDirect = false,
 }) with _$RoomSummary {
+  /// A summary of a room the user is in, from its synced metadata.
+  factory RoomSummary.fromMetadata(RoomMetadata metadata) => .new(
+    roomId: metadata.id,
+    joinedMembers: metadata.lazyLoadSummary?.joinedMemberCount,
+    avatarUrl: metadata.avatar,
+    canonicalAlias: metadata.canonicalAlias,
+    name: metadata.name,
+    topic: metadata.topic,
+  );
+
   factory RoomSummary.fromJson(Map<String, Object?> json) =>
       _$RoomSummaryFromJson(json);
 }

lib/widgets/appbar.dart

@@ -13,6 +13,9 @@ final class const Appbar({
   final double? scrolledUnderElevation,
   final IList<Widget> actions = const .empty(),
   final VoidCallback? onTap,
+
+  /// Whether to show the minimize, maximize and close buttons on desktop.
+  final bool windowControls = true,
   super.key,
 }) extends ConsumerWidget implements PreferredSizeWidget {
   @override
@@ -50,7 +53,7 @@ final class const Appbar({
         flexibleSpace: GestureDetector(onDoubleTap: maximize),
         actions: [
           ...actions,
-          if (!(Platform.isAndroid || Platform.isIOS)) ...[
+          if (windowControls && !(Platform.isAndroid || Platform.isIOS)) ...[
             if (ref
                     .watch(SettingsController.provider)
                     .whenOrNull(

lib/widgets/room_appbar.dart

@@ -7,6 +7,7 @@ import "package:nexus/widgets/avatar_or_hash.dart";
 import "package:nexus/widgets/count_badge.dart";
 import "package:nexus/widgets/room_menu_button.dart";
 import "package:nexus/widgets/room_summary_sheet.dart";
+import "package:nexus/widgets/room_title.dart";
 import "package:nexus/widgets/sidebar.dart";
 
 final class const RoomAppbar({
@@ -30,17 +31,7 @@ final class const RoomAppbar({
       onTap: room?.metadata == null
           ? null
           : () => context.showAdaptiveSheet(
-              (context) => RoomSummarySheet(
-                .new(
-                  roomId: room!.metadata!.id,
-                  joinedMembers:
-                      room.metadata!.lazyLoadSummary?.joinedMemberCount,
-                  avatarUrl: room.metadata?.avatar,
-                  canonicalAlias: room.metadata?.canonicalAlias,
-                  name: room.metadata?.name,
-                  topic: room.metadata?.topic,
-                ),
-              ),
+              (context) => RoomSummarySheet(.fromMetadata(room!.metadata!)),
             ),
       leading: isDesktop
           ? room == null
@@ -62,24 +53,9 @@ final class const RoomAppbar({
       scrolledUnderElevation: 0,
       title: room == null
           ? null
-          : Column(
-              crossAxisAlignment: .start,
-              children: [
-                Text(
-                  room.metadata?.name ?? "Unnamed Room",
-                  overflow: .ellipsis,
-                  maxLines: 1,
-                ),
-                if (room.metadata?.topic?.isNotEmpty == true)
-                  Text(
-                    room.metadata!.topic!,
-                    maxLines: 1,
-                    overflow: .ellipsis,
-                    style: Theme.of(context).textTheme.labelMedium?.copyWith(
-                      color: Theme.of(context).colorScheme.onSurfaceVariant,
-                    ),
-                  ),
-              ],
+          : RoomTitle(
+              room.metadata?.name ?? "Unnamed Room",
+              topic: room.metadata?.topic,
             ),
       actions: .new(
         room == null

lib/widgets/room_list.dart

@@ -9,6 +9,8 @@ import "package:nexus/helpers/extensions/room_destinations.dart";
 import "package:nexus/helpers/extensions/show_adaptive_sheet.dart";
 import "package:nexus/widgets/adaptive_menu_button.dart";
 import "package:nexus/models/nav_page.dart";
+import "package:nexus/widgets/appbar.dart";
+import "package:nexus/widgets/room_title.dart";
 import "package:nexus/widgets/avatar_or_hash.dart";
 import "package:nexus/widgets/create_room_sheet.dart";
 import "package:nexus/widgets/start_dm_sheet.dart";
@@ -16,6 +18,7 @@ import "package:nexus/widgets/divider_widget.dart";
 import "package:nexus/widgets/error_dialog.dart";
 import "package:nexus/widgets/pages/settings.dart";
 import "package:nexus/widgets/join_sheet.dart";
+import "package:nexus/widgets/room_summary_sheet.dart";
 import "package:nexus/widgets/room_menu_button.dart";
 import "package:nexus/widgets/space_hierarchy_sheet.dart";
 import "package:nexus/controllers/key.dart";
@@ -188,7 +191,7 @@ class const SpacesRail({super.key}) extends ConsumerWidget {
                       icon: const Icon(Icons.add),
                     ),
                     const IconButton(
-                      tooltip: "Explore other rooms",
+                      tooltip: "Explore other rooms (Not yet implemented)",
                       onPressed: null,
                       icon: Icon(Icons.explore),
                     ),
@@ -232,25 +235,33 @@ class const RoomsPane({super.key}) extends ConsumerWidget {
       }),
     );
     final isDm = selectedSpace.id == "dms";
+    final spaceMetadata = selectedSpace.room?.metadata;
 
     return Scaffold(
       backgroundColor: Colors.transparent,
-      appBar: AppBar(
+      appBar: Appbar(
+        // Home and DMs aren't real spaces, so they don't have a summary.
+        onTap: spaceMetadata == null
+            ? null
+            : () => context.showAdaptiveSheet(
+                (_) => RoomSummarySheet(.fromMetadata(spaceMetadata)),
+              ),
+        windowControls: false,
         leading: AvatarOrHash(
-          selectedSpace.room?.metadata?.avatar,
+          spaceMetadata?.avatar,
           fallback: selectedSpace.icon == null
               ? null
               : Icon(selectedSpace.icon),
           selectedSpace.title,
         ),
-        title: Text(selectedSpace.title, overflow: .ellipsis),
+        title: RoomTitle(selectedSpace.title, topic: spaceMetadata?.topic),
         backgroundColor: Colors.transparent,
-        actions: [
+        actions: .new([
           RoomMenuButton(
             selectedSpace.room,
             children: selectedSpace.allChildRooms,
           ),
-        ],
+        ]),
       ),
       body: MaterialUiCompatibilityBridge(
         child: Builder(
@@ -273,75 +284,81 @@ class const RoomsPane({super.key}) extends ConsumerWidget {
                   ),
                 ],
               ),
-              child: NavigationRailM3E(
-                fab: selectedSpace.room == null
-                    ? null
-                    : .new(
-                        icon: const Icon(Icons.explore),
-                        label: "Browse space",
-                        tooltip: "Browse and join rooms in this space",
-                        onPressed: () => context.showAdaptiveSheet(
-                          (_) => SpaceHierarchySheet(selectedSpace.id),
+              child: Padding(
+                padding: const .only(top: 4),
+                child: NavigationRailM3E(
+                  fab: selectedSpace.room == null
+                      ? null
+                      : .new(
+                          icon: const Icon(Icons.explore),
+                          label: "Browse space",
+                          tooltip: "Browse and join rooms in this space",
+                          onPressed: () => context.showAdaptiveSheet(
+                            (_) => SpaceHierarchySheet(selectedSpace.id),
+                          ),
                         ),
-                      ),
-                expandedWidth: double.infinity,
-                scrollable: true,
-                background: Colors.transparent,
-                type: .alwaysExpand,
-                selectedIndex: max(
-                  0,
-                  selectedSpace.allChildRooms.indexWhere(
-                    (room) => room.metadata?.id == selectedRoomId,
-                  ),
-                ),
-                sections: [
-                  .new(
-                    header: selectedSpace.room == null
-                        ? null
-                        : const DividerWidget(Text("Rooms")),
-                    destinations: selectedSpace.children.toDestinations(
-                      isDm: isDm,
+                  expandedWidth: double.infinity,
+                  scrollable: true,
+                  background: Colors.transparent,
+                  type: .alwaysExpand,
+                  selectedIndex: max(
+                    0,
+                    selectedSpace.allChildRooms.indexWhere(
+                      (room) => room.metadata?.id == selectedRoomId,
                     ),
                   ),
-                  ...selectedSpace.subSpaces.map(
-                    (subSpace) => NavigationRailM3ESection(
-                      header: DividerWidget(
-                        Row(
-                          mainAxisSize: .min,
-                          spacing: 8,
-                          children: [
-                            if (subSpace.room.metadata?.avatar != null)
-                              AvatarOrHash(
-                                subSpace.room.metadata?.avatar,
-                                subSpace.room.metadata?.name ?? "Unnamed Room",
-                                dimension: 16,
-                              ),
-                            Flexible(
-                              child: Text(
-                                subSpace.room.metadata?.name ?? "Unnamed Space",
-                                maxLines: 1,
-                                overflow: .ellipsis,
-                              ),
-                            ),
-                          ],
-                        ),
-                      ),
-                      destinations: subSpace.children.toDestinations(
+                  sections: [
+                    .new(
+                      header: selectedSpace.room == null
+                          ? null
+                          : const DividerWidget(Text("Rooms")),
+                      destinations: selectedSpace.children.toDestinations(
                         isDm: isDm,
                       ),
                     ),
-                  ),
-                ],
-                onDestinationSelected: (value) {
-                  ref
-                      .read(
-                        KeyController.provider(KeyController.roomKey).notifier,
-                      )
-                      .set(selectedSpace.allChildRooms[value].metadata?.id);
-                  if (Navigator.of(context).canPop()) {
-                    Navigator.of(context).pop();
-                  }
-                },
+                    ...selectedSpace.subSpaces.map(
+                      (subSpace) => NavigationRailM3ESection(
+                        header: DividerWidget(
+                          Row(
+                            mainAxisSize: .min,
+                            spacing: 8,
+                            children: [
+                              if (subSpace.room.metadata?.avatar != null)
+                                AvatarOrHash(
+                                  subSpace.room.metadata?.avatar,
+                                  subSpace.room.metadata?.name ??
+                                      "Unnamed Room",
+                                  dimension: 16,
+                                ),
+                              Flexible(
+                                child: Text(
+                                  subSpace.room.metadata?.name ??
+                                      "Unnamed Space",
+                                  maxLines: 1,
+                                  overflow: .ellipsis,
+                                ),
+                              ),
+                            ],
+                          ),
+                        ),
+                        destinations: subSpace.children.toDestinations(
+                          isDm: isDm,
+                        ),
+                      ),
+                    ),
+                  ],
+                  onDestinationSelected: (value) {
+                    ref
+                        .read(
+                          KeyController.provider(KeyController.roomKey)
+                              .notifier,
+                        )
+                        .set(selectedSpace.allChildRooms[value].metadata?.id);
+                    if (Navigator.of(context).canPop()) {
+                      Navigator.of(context).pop();
+                    }
+                  },
+                ),
               ),
             );
           },

lib/widgets/room_title.dart

@@ -0,0 +1,22 @@
+import "package:material_ui/material_ui.dart";
+
+/// A room or space's name, with its topic underneath if it has one, for app
+/// bars.
+class const RoomTitle(final String name, {final String? topic, super.key})
+    extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) => Column(
+    crossAxisAlignment: .start,
+    children: [
+      Text(name, overflow: .ellipsis, maxLines: 1),
+      if (topic?.isNotEmpty == true)
+        Text(
+          topic!,
+          maxLines: 1,
+          overflow: .ellipsis,
+          style: Theme.of(context).textTheme.labelMedium
+              ?.copyWith(color: Theme.of(context).colorScheme.onSurfaceVariant),
+        ),
+    ],
+  );
+}