feat(home): 顶部导航随翻页联动并把推荐更名为精选

test/recommend/home_poster_badge_weight_test.dart

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+// Author: fruit.com.cn
+// 职责：验证推荐页封面标签使用常规字重，保留原有样式与点击。
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:fruitshorts/core/data/models/drama.dart';
+import 'package:fruitshorts/core/theme/app_colors.dart';
+import 'package:fruitshorts/l10n/app_localizations.dart';
+import 'package:fruitshorts/pages/recommend/widgets/home_recommend_content.dart';
+
+const _tag = '热播';
+const _fallback = '上新';
+const _posterWidth = 110.0;
+const _posterHeight = 230.0;
+
+void main() {
+  for (final tag in [_tag, '']) {
+    testWidgets(
+      'should_keep_badge_regular_when_using_${tag.isEmpty ? 'fallback' : 'tag'}',
+      (tester) async {
+        var taps = 0;
+        await tester.pumpWidget(_host(tag, () => taps++));
+        await tester.pumpAndSettle();
+        final label = find.text(tag.isEmpty ? _fallback : tag);
+        final text = tester.widget<Text>(label);
+        expect(text.style?.fontWeight, FontWeight.w400);
+        expect(text.style?.fontSize, 11);
+        expect(text.style?.color, AppColors.textPrimary);
+        final badge = tester.widget<Container>(
+          find.ancestor(of: label, matching: find.byType(Container)).first,
+        );
+        final decoration = badge.decoration! as BoxDecoration;
+        expect(decoration.color, AppColors.brandRed);
+        expect(decoration.borderRadius, BorderRadius.circular(6));
+        expect(decoration.boxShadow, isNull);
+        expect(
+          badge.padding,
+          const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
+        );
+        final position = tester.widget<Positioned>(
+          find.ancestor(of: label, matching: find.byType(Positioned)).first,
+        );
+        expect(position.left, 8);
+        expect(position.top, 8);
+        await tester.tap(label);
+        expect(taps, 1);
+        expect(tester.takeException(), isNull);
+      },
+    );
+  }
+}
+
+Widget _host(String tag, VoidCallback onTap) => MaterialApp(
+  locale: const Locale('zh'),
+  localizationsDelegates: AppLocalizations.localizationsDelegates,
+  supportedLocales: AppLocalizations.supportedLocales,
+  home: Scaffold(
+    body: SizedBox(
+      width: _posterWidth,
+      height: _posterHeight,
+      child: HomePosterCard(
+        drama: Drama(
+          id: 'poster',
+          title: '测试短剧',
+          synopsis: '',
+          posterUrl: '',
+          tag: tag,
+        ),
+        badge: _fallback,
+        onTap: onTap,
+      ),
+    ),
+  ),
+);