fix(ui): refine track action spacing

lib/screens/artist_screen_widgets.dart

@@ -433,7 +433,7 @@ extension _ArtistScreenSections on _ArtistScreenState {
             hasLocalPlaybackCandidate: isInHistory || isInLocalLibrary,
           ),
           child: Padding(
-            padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+            padding: const EdgeInsets.fromLTRB(16, 8, 10, 8),
             child: Row(
               children: [
                 SizedBox(

lib/screens/home_tab_widgets.dart

@@ -269,7 +269,7 @@ class _TrackItemWithStatus extends ConsumerWidget {
           splashColor: colorScheme.primary.withValues(alpha: 0.12),
           highlightColor: colorScheme.primary.withValues(alpha: 0.08),
           child: Padding(
-            padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
+            padding: const EdgeInsets.fromLTRB(12, 10, 6, 10),
             child: Row(
               children: [
                 ClipRRect(

lib/widgets/track_card.dart

@@ -77,6 +77,9 @@ class TrackCard extends StatelessWidget {
     final theme = Theme.of(context);
     final colorScheme = theme.colorScheme;
     final borderRadius = tokens.borderRadiusCover;
+    final contentPadding = style == TrackCardStyle.flat
+        ? EdgeInsets.fromLTRB(tokens.gapMd, tokens.gapMd, 6, tokens.gapMd)
+        : EdgeInsets.all(tokens.gapMd);
 
     final Color? cardColor;
     if (isSelected) {
@@ -111,7 +114,7 @@ class TrackCard extends StatelessWidget {
           children: [
             if (background != null) Positioned.fill(child: background!),
             Padding(
-              padding: EdgeInsets.all(tokens.gapMd),
+              padding: contentPadding,
               child: Row(
                 children: [
                   if (isSelectionMode) ...[

lib/widgets/track_collection_quick_actions.dart

@@ -59,7 +59,7 @@ class TrackCollectionQuickActions extends ConsumerWidget {
         track,
         hasLocalPlaybackCandidate: hasLocalPlaybackCandidate,
       ),
-      padding: const EdgeInsets.only(left: 12),
+      padding: EdgeInsets.zero,
       constraints: const BoxConstraints(minWidth: 48, minHeight: 48),
     );
   }

test/design_system_test.dart

@@ -431,6 +431,31 @@ void main() {
       expect(card.color, Colors.transparent);
     });
 
+    testWidgets('flat style keeps trailing actions near the card edge', (
+      tester,
+    ) async {
+      const trailingKey = Key('flat-trailing');
+      await tester.pumpWidget(
+        host(
+          const SizedBox(
+            width: 320,
+            child: TrackCard(
+              leading: SizedBox(width: 24),
+              title: 'Song',
+              style: TrackCardStyle.flat,
+              trailing: SizedBox(key: trailingKey, width: 48, height: 48),
+            ),
+          ),
+        ),
+      );
+
+      final cardRect = tester.getRect(find.byType(Card));
+      final trailingRect = tester.getRect(find.byKey(trailingKey));
+      // Card's render box includes its 8dp flat-row margin; content itself is
+      // inset another 6dp from the painted card edge.
+      expect(cardRect.right - trailingRect.right, 14);
+    });
+
     testWidgets('grid variant is a real button with a semantic label', (
       tester,
     ) async {

test/preview_button_layout_test.dart

@@ -6,6 +6,7 @@ import 'package:spotiflac_android/l10n/l10n.dart';
 import 'package:spotiflac_android/models/track.dart';
 import 'package:spotiflac_android/providers/music_player_provider.dart';
 import 'package:spotiflac_android/widgets/preview_button.dart';
+import 'package:spotiflac_android/widgets/track_collection_quick_actions.dart';
 
 void main() {
   const track = Track(
@@ -66,4 +67,21 @@ void main() {
     );
     expectCenteredHitbox(tester, Icons.play_circle_fill_rounded);
   });
+
+  testWidgets('overflow menu icon is centered in its adjacent hitbox', (
+    tester,
+  ) async {
+    await tester.pumpWidget(
+      const ProviderScope(
+        child: MaterialApp(
+          localizationsDelegates: AppLocalizations.localizationsDelegates,
+          supportedLocales: AppLocalizations.supportedLocales,
+          home: Scaffold(body: TrackCollectionQuickActions(track: track)),
+        ),
+      ),
+    );
+    await tester.pump();
+
+    expectCenteredHitbox(tester, Icons.more_vert);
+  });
 }