refactor(ui): unify theme styling and enlarge profile button

Centralize existing Material and Mornye layout metrics in AppTokens and share adaptive icon selection. Enlarge the Home profile avatar to 44 dp with a 56 dp touch target.

lib/screens/album_screen.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/cupertino.dart' show CupertinoIcons;
+import 'package:spotiflac_android/theme/app_tokens.dart';
 import 'package:spotiflac_android/theme/mornye_theme.dart';
 import 'package:spotiflac_android/screens/track_history_snapshot.dart';
 import 'package:spotiflac_android/widgets/collection_scaffold.dart';
@@ -514,7 +515,7 @@ class _AlbumScreenState extends ConsumerState<AlbumScreen>
               extensionId: widget.extensionId,
               style: TextStyle(
                 color: colorScheme.primary,
-                fontSize: context.isMornye ? 20 : 16,
+                fontSize: context.tokens.headerSubtitleSize,
                 fontWeight: context.isMornye
                     ? FontWeight.w400
                     : FontWeight.w600,

lib/screens/downloaded_album_screen.dart

@@ -1,6 +1,7 @@
 import 'dart:io';
 import 'dart:math';
 import 'package:flutter/material.dart';
+import 'package:spotiflac_android/theme/app_tokens.dart';
 import 'package:spotiflac_android/theme/mornye_theme.dart';
 import 'package:spotiflac_android/theme/cover_palette.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
@@ -395,7 +396,7 @@ class _DownloadedAlbumScreenState extends ConsumerState<DownloadedAlbumScreen>
           color: context.isMornye
               ? colorScheme.primary
               : HeaderPalette.of(context).onSurfaceVariant,
-          fontSize: context.isMornye ? 20 : 16,
+          fontSize: context.tokens.headerSubtitleSize,
           fontWeight: context.isMornye ? FontWeight.w400 : FontWeight.w600,
         ),
         textAlign: TextAlign.center,

lib/screens/home_tab_widgets.dart

@@ -274,9 +274,9 @@ class _TrackItemWithStatus extends ConsumerWidget {
           child: Padding(
             padding: EdgeInsets.fromLTRB(
               12,
-              context.isMornye ? 12 : 10,
+              context.tokens.trackRowPaddingV,
               6,
-              context.isMornye ? 12 : 10,
+              context.tokens.trackRowPaddingV,
             ),
             child: Row(
               children: [
@@ -494,7 +494,7 @@ class _CollectionItemWidget extends StatelessWidget {
           child: Padding(
             padding: EdgeInsets.symmetric(
               horizontal: 12,
-              vertical: context.isMornye ? 12 : 10,
+              vertical: context.tokens.trackRowPaddingV,
             ),
             child: Row(
               children: [

lib/screens/local_album_screen.dart

@@ -1,6 +1,7 @@
 import 'dart:io';
 import 'dart:math';
 import 'package:flutter/material.dart';
+import 'package:spotiflac_android/theme/app_tokens.dart';
 import 'package:spotiflac_android/theme/mornye_theme.dart';
 import 'package:spotiflac_android/services/local_track_batch_actions.dart';
 import 'package:spotiflac_android/theme/cover_palette.dart';
@@ -274,7 +275,7 @@ class _LocalAlbumScreenState extends ConsumerState<LocalAlbumScreen>
           color: context.isMornye
               ? colorScheme.primary
               : HeaderPalette.of(context).onSurfaceVariant,
-          fontSize: context.isMornye ? 20 : 16,
+          fontSize: context.tokens.headerSubtitleSize,
           fontWeight: context.isMornye ? FontWeight.w400 : FontWeight.w600,
         ),
         textAlign: TextAlign.center,

lib/screens/now_playing_screen.dart

@@ -15,6 +15,7 @@ import 'package:spotiflac_android/screens/downloaded_album_screen.dart';
 import 'package:spotiflac_android/screens/local_album_screen.dart';
 import 'package:spotiflac_android/services/library_database.dart';
 import 'package:spotiflac_android/services/music_player_service.dart';
+import 'package:spotiflac_android/theme/app_tokens.dart';
 import 'package:spotiflac_android/theme/mornye_theme.dart';
 import 'package:spotiflac_android/utils/clickable_metadata.dart';
 import 'package:spotiflac_android/utils/file_access.dart';
@@ -2034,7 +2035,7 @@ class _PlaybackControls extends ConsumerWidget {
                 icon: const Icon(Icons.skip_previous),
                 onPressed: controller.previous,
               ),
-            SizedBox(width: mornye ? 12 : 20),
+            SizedBox(width: context.tokens.playerControlGap),
             if (mornye)
               MornyePlaybackButton(
                 icon: isPlaying
@@ -2073,7 +2074,7 @@ class _PlaybackControls extends ConsumerWidget {
                       : () => controller.togglePlayPause(isPlaying),
                 ),
               ),
-            SizedBox(width: mornye ? 12 : 20),
+            SizedBox(width: context.tokens.playerControlGap),
             if (mornye)
               MornyePlaybackButton(
                 icon: CupertinoIcons.forward_fill,
@@ -2496,7 +2497,7 @@ class _SyncedLyricsViewState extends ConsumerState<_SyncedLyricsView> {
                               ? Theme.of(context).textTheme.headlineSmall
                               : Theme.of(context).textTheme.titleLarge)
                           ?.copyWith(
-                            height: mornye ? 1.3 : 1.4,
+                            height: context.tokens.lyricsLineHeight,
                             fontSize: mornye ? 28 : null,
                             fontWeight: mornye || isActive
                                 ? FontWeight.bold
@@ -2543,7 +2544,9 @@ class _SyncedLyricsViewState extends ConsumerState<_SyncedLyricsView> {
 
               return Padding(
                 key: _lineKeys[index],
-                padding: EdgeInsets.symmetric(vertical: mornye ? 16 : 10),
+                padding: EdgeInsets.symmetric(
+                  vertical: context.tokens.lyricsLinePaddingV,
+                ),
                 child: GestureDetector(
                   onTap: () =>
                       ref.read(musicPlayerControllerProvider).seek(line.time),
@@ -2785,7 +2788,7 @@ class _WordHighlightedLyricLineState
         (Theme.of(context).textTheme.headlineSmall ?? const TextStyle())
             .copyWith(
               fontSize: context.isMornye ? 28 : null,
-              height: context.isMornye ? 1.3 : 1.4,
+              height: context.tokens.lyricsLineHeight,
               fontWeight: FontWeight.bold,
             );
     final primary = widget.line.hasWordTiming

lib/screens/repo/extension_details_screen.dart

@@ -332,7 +332,7 @@ class _ExtensionDetailsScreenState
         child: Row(
           children: [
             Icon(
-              context.isMornye ? mornyeIconFor(icon) : icon,
+              context.adaptiveIcon(icon),
               size: 20,
               color: colorScheme.primary,
             ),
@@ -768,7 +768,7 @@ class _CapabilityRow extends StatelessWidget {
           child: Row(
             children: [
               Icon(
-                context.isMornye ? mornyeIconFor(icon) : icon,
+                context.adaptiveIcon(icon),
                 size: 20,
                 color: enabled ? colorScheme.primary : colorScheme.outline,
               ),

lib/screens/settings/about_page.dart

@@ -697,7 +697,7 @@ class _AboutSettingsItem extends StatelessWidget {
                   width: 40,
                   height: 40,
                   child: Icon(
-                    context.isMornye ? mornyeIconFor(icon) : icon,
+                    context.adaptiveIcon(icon),
                     color: context.isMornye
                         ? colorScheme.primary
                         : colorScheme.onSurfaceVariant,

lib/screens/settings/app_settings_page.dart

@@ -282,9 +282,7 @@ class _UpdateChannelSelector extends StatelessWidget {
           Row(
             children: [
               Icon(
-                context.isMornye
-                    ? mornyeIconFor(Icons.new_releases)
-                    : Icons.new_releases,
+                context.adaptiveIcon(Icons.new_releases),
                 color: context.isMornye
                     ? colorScheme.primary
                     : colorScheme.onSurfaceVariant,
@@ -389,9 +387,7 @@ class _VerificationBrowserModeSelector extends StatelessWidget {
               Row(
                 children: [
                   Icon(
-                    context.isMornye
-                        ? mornyeIconFor(Icons.open_in_browser)
-                        : Icons.open_in_browser,
+                    context.adaptiveIcon(Icons.open_in_browser),
                     color: context.isMornye
                         ? colorScheme.primary
                         : colorScheme.onSurfaceVariant,

lib/screens/settings/appearance_settings_page.dart

@@ -709,7 +709,7 @@ class _LanguageSelector extends StatelessWidget {
     final colorScheme = Theme.of(context).colorScheme;
     final content = ListTile(
       leading: Icon(
-        context.isMornye ? mornyeIconFor(Icons.language) : Icons.language,
+        context.adaptiveIcon(Icons.language),
         color: context.isMornye
             ? colorScheme.primary
             : colorScheme.onSurfaceVariant,

lib/screens/settings/extension_detail_page.dart

@@ -594,7 +594,6 @@ class _ExtensionDivider extends StatelessWidget {
   @override
   Widget build(BuildContext context) => Divider(
     height: 1,
-    thickness: context.isMornye ? 0.5 : 1,
     indent: indent,
     endIndent: 16,
     color: context.isMornye
@@ -706,7 +705,7 @@ class _CapabilityItem extends StatelessWidget {
           child: Row(
             children: [
               Icon(
-                context.isMornye ? mornyeIconFor(icon) : icon,
+                context.adaptiveIcon(icon),
                 color: context.isMornye || enabled
                     ? colorScheme.primary
                     : colorScheme.outline,
@@ -980,7 +979,7 @@ class _PermissionItem extends StatelessWidget {
           child: Row(
             children: [
               Icon(
-                context.isMornye ? mornyeIconFor(icon) : icon,
+                context.adaptiveIcon(icon),
                 color: context.isMornye
                     ? colorScheme.primary
                     : colorScheme.onSurfaceVariant,

lib/screens/track_metadata_edit_sheet.dart

@@ -438,7 +438,7 @@ class _EditMetadataSheetState extends State<_EditMetadataSheet> {
             vertical: 4,
           ),
           leading: Icon(
-            context.isMornye ? mornyeIconFor(icon) : icon,
+            context.adaptiveIcon(icon),
             color: selected ? cs.primary : cs.onSurfaceVariant,
           ),
           title: Text(name, maxLines: 2, overflow: TextOverflow.ellipsis),
@@ -3165,11 +3165,7 @@ class _EditMetadataSheetState extends State<_EditMetadataSheet> {
 
     final headerRow = Row(
       children: [
-        Icon(
-          context.isMornye ? mornyeIconFor(icon) : icon,
-          size: 20,
-          color: cs.primary,
-        ),
+        Icon(context.adaptiveIcon(icon), size: 20, color: cs.primary),
         const SizedBox(width: 10),
         Expanded(
           child: Text(

lib/screens/upgrade_intro_screen.dart

@@ -486,7 +486,7 @@ class _TourFeature extends StatelessWidget {
           SizedBox(
             width: 36,
             child: Icon(
-              context.isMornye ? mornyeIconFor(icon) : icon,
+              context.adaptiveIcon(icon),
               size: 28,
               color: theme.colorScheme.primary,
             ),