feat(cover): 支持横版封面并收紧底栏图标间距

- Drama 新增 coverLandscape，WatchProgress 新增 dramaCoverLandscape
- 继续观看横幅优先使用横版封面，缺省回退竖版
- 底部导航栏图标与文字间距由 5dp 收紧至 1dp

lib/pages/following/widgets/continue_watching_banner.dart

@@ -33,13 +33,12 @@ class ContinueWatchingBanner extends StatelessWidget {
     return SizedBox(
       height: AppDimens.followingBannerHeight,
       child: ClipRRect(
-        borderRadius:
-            BorderRadius.circular(AppDimens.followingBannerRadius),
+        borderRadius: BorderRadius.circular(AppDimens.followingBannerRadius),
         child: Stack(
           fit: StackFit.expand,
           children: [
             RemoteImage(
-              record.displayCover,
+              record.displayLandscapeCover,
               fit: BoxFit.cover,
               showFallbackIcon: true,
               fallbackColor: AppColors.contentSurface,
@@ -82,8 +81,7 @@ class ContinueWatchingBanner extends StatelessWidget {
                                 overflow: TextOverflow.ellipsis,
                                 style: const TextStyle(
                                   color: AppColors.bannerTitleWarm,
-                                  fontSize:
-                                      AppDimens.followingBannerTitleFont,
+                                  fontSize: AppDimens.followingBannerTitleFont,
                                   fontWeight: FontWeight.w400,
                                 ),
                               ),
@@ -143,8 +141,7 @@ class _ContinueButton extends StatelessWidget {
         height: AppDimens.followingBannerButtonHeight,
         child: Padding(
           padding: const EdgeInsets.symmetric(
-            horizontal:
-                AppDimens.followingBannerButtonHorizontalPadding,
+            horizontal: AppDimens.followingBannerButtonHorizontalPadding,
           ),
           child: Row(
             mainAxisSize: MainAxisSize.min,
@@ -188,9 +185,7 @@ class _ProgressBar extends StatelessWidget {
         height: AppDimens.followingBannerProgressHeight,
         width: double.infinity,
         child: DecoratedBox(
-          decoration: const BoxDecoration(
-            color: Color(0x66FFFFFF),
-          ),
+          decoration: const BoxDecoration(color: Color(0x66FFFFFF)),
           child: Align(
             alignment: Alignment.centerLeft,
             child: FractionallySizedBox(