fix(flutter): 首页剧卡移除封面锁定角标

lib/pages/home/widgets/home_drama_grid.dart

@@ -126,8 +126,6 @@ class HomeDramaCard extends StatelessWidget {
             fallbackAspectRatio: _coverAspectRatio,
           ),
           Positioned(top: 8, left: 8, child: _tagBadge()),
-          if (_lockedCount > 0)
-            Positioned(top: 8, right: 8, child: _lockedBadge()),
           Positioned(left: 8, bottom: 8, child: _viewsBadge()),
           Positioned(right: 8, bottom: 8, child: _episodeBadge()),
         ],
@@ -140,13 +138,6 @@ class HomeDramaCard extends StatelessWidget {
         drama.episodes.any((episode) => episode.isFree);
   }
 
-  int get _lockedCount {
-    final explicit = drama.episodes.where((episode) => episode.locked).length;
-    if (explicit > 0) return explicit;
-    final inferred = drama.episodeCount - drama.freeEpisodes;
-    return inferred > 0 ? inferred : 0;
-  }
-
   Widget _tagBadge() {
     final label = _isFree ? l10n.free : l10n.originalTag;
     return Container(
@@ -170,32 +161,6 @@ class HomeDramaCard extends StatelessWidget {
     );
   }
 
-  Widget _lockedBadge() {
-    return Container(
-      key: Key('home-drama-locked-${drama.id}'),
-      padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 3),
-      decoration: BoxDecoration(
-        color: AppColors.overlayDark,
-        borderRadius: BorderRadius.circular(AppDimens.pillRadius),
-      ),
-      child: Row(
-        mainAxisSize: MainAxisSize.min,
-        children: [
-          const Icon(Icons.lock_rounded, color: AppColors.onPrimary, size: 11),
-          const SizedBox(width: 2),
-          Text(
-            l10n.lockedEpisodeCount(_lockedCount),
-            style: const TextStyle(
-              color: AppColors.onPrimary,
-              fontSize: 9,
-              fontWeight: FontWeight.w700,
-            ),
-          ),
-        ],
-      ),
-    );
-  }
-
   Widget _episodeBadge() {
     return Container(
       key: Key('home-drama-episodes-badge-${drama.id}'),

test/home/home_card_style_test.dart

@@ -54,8 +54,11 @@ void main() {
     );
     expect((tag.decoration! as BoxDecoration).color, AppColors.badgePink);
     expect(find.text('Free'), findsOneWidget);
-    expect(find.text('18 locked'), findsOneWidget);
     expect(find.text('All 24'), findsOneWidget);
+    expect(
+      find.byKey(const Key('home-drama-locked-style-drama')),
+      findsNothing,
+    );
     expect(find.byKey(const Key('home-drama-add-style-drama')), findsNothing);
 
     // 播放次数角标落在封面内，并按万位格式化。