Rebuild UI on the Noo design system

Replaces the Material 3 screens with the Noo design system: warm
neutrals, one violet accent, pill controls, Schibsted Grotesk/
Instrument Sans, Lucide icons, no gradients/shadows.

- New lib/widgets/noo/ component kit (core, lists, files, media, nav,
  overlays) plus lib/theme/design_tokens.dart for the color/type/space/
  radius/motion tokens.
- Rebuilt the app shell (top/bottom bars, drawer, desktop sidebar and
  toolbar), every tab (Files/Offline, Photos, Favorites, Recent,
  Activity, Trash, Shares), Settings, the lock and login screens, the
  media viewer, search, the details/share sheets, and the share-upload
  and move/copy destination pickers.
- Added a design canvas (linked from DESIGN_SYSTEM.md) covering the
  screens the spec didn't already describe, with matching Android and
  iOS chrome; wrote up the approved recipes into DESIGN_SYSTEM.md §4.
- Removed now-dead legacy widgets (media_grid_tile, swipeable_item,
  sync_status_badge, selectable_thumbnail) and updated
  architecture.md/styling.md/standards.md to describe the new
  structure and component/testing conventions.
- Added widget tests for the noo/ component kit.

This is a UI-only rework: no provider/model/service behavior changed.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

lib/widgets/details/details_info_tab.dart

@@ -1,21 +1,19 @@
 import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
 import '../../models/nextcloud_item.dart';
+import '../../theme/design_tokens.dart';
+import '../noo/lists/noo_grouped_list.dart';
 import '../synced_header_scaffold.dart' show formatBytes;
 
-/// Plain metadata tab of the Details sheet — name, type, size, location,
-/// and dates. No network calls, so no loading state needed.
+/// Plain metadata list of the Details sheet/dialog - name, type, size,
+/// location, and dates. No network calls, so no loading state needed.
 class DetailsInfoTab extends StatelessWidget {
   final NextcloudItem item;
-  final ScrollController? scrollController;
 
-  const DetailsInfoTab({super.key, required this.item, this.scrollController});
+  const DetailsInfoTab({super.key, required this.item});
 
   @override
   Widget build(BuildContext context) {
-    final theme = Theme.of(context);
-    final colorScheme = theme.colorScheme;
-
     final rows = <(String, String)>[
       ('Name', item.name),
       ('Type', item.isFolder ? 'Folder' : (item.mimeType ?? 'File')),
@@ -26,39 +24,51 @@ class DetailsInfoTab extends StatelessWidget {
       ('Favorite', item.isFavorite ? 'Yes' : 'No'),
     ];
 
-    return ListView.separated(
-      controller: scrollController,
-      padding: const EdgeInsets.fromLTRB(20, 12, 20, 24),
-      itemCount: rows.length,
-      separatorBuilder: (context, index) => const Divider(height: 1),
-      itemBuilder: (context, index) {
-        final (label, value) = rows[index];
-        return Padding(
-          padding: const EdgeInsets.symmetric(vertical: 12),
-          child: Row(
-            crossAxisAlignment: CrossAxisAlignment.start,
-            children: [
-              SizedBox(
-                width: 96,
-                child: Text(
-                  label,
-                  style: theme.textTheme.bodyMedium?.copyWith(
-                    color: colorScheme.onSurfaceVariant,
-                  ),
-                ),
+    return NooGroupedList(
+      children: [for (final row in rows) _InfoRow(label: row.$1, value: row.$2)],
+    );
+  }
+}
+
+class _InfoRow extends StatelessWidget {
+  final String label;
+  final String value;
+
+  const _InfoRow({required this.label, required this.value});
+
+  @override
+  Widget build(BuildContext context) {
+    final colors = context.nooColors;
+    return ColoredBox(
+      color: colors.surface,
+      child: Padding(
+        padding: const EdgeInsets.symmetric(
+          horizontal: NooSpace.md,
+          vertical: NooSpace.sm,
+        ),
+        child: Row(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            SizedBox(
+              width: 96,
+              child: Text(
+                label,
+                style: NooText.body.copyWith(fontSize: 14, color: colors.fg3),
               ),
-              Expanded(
-                child: Text(
-                  value,
-                  style: theme.textTheme.bodyMedium?.copyWith(
-                    fontWeight: FontWeight.w500,
-                  ),
+            ),
+            Expanded(
+              child: Text(
+                value,
+                style: NooText.body.copyWith(
+                  fontSize: 14,
+                  fontWeight: FontWeight.w500,
+                  color: colors.fg1,
                 ),
               ),
-            ],
-          ),
-        );
-      },
+            ),
+          ],
+        ),
+      ),
     );
   }
 }