fix(player): 评论总数含回复并改用相对时间

test/formatting/relative_date_time_test.dart

@@ -0,0 +1,57 @@
+// Author: fruit.com.cn
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:fruitshorts/core/formatting/relative_date_time.dart';
+import 'package:fruitshorts/l10n/app_localizations_en.dart';
+
+void main() {
+  final l10n = AppLocalizationsEn();
+  final now = DateTime(2026, 10, 21, 12);
+
+  test('should_show_just_now_under_one_minute', () {
+    expect(
+      formatRelativeDateTime(
+        now.subtract(const Duration(seconds: 59)),
+        l10n,
+        now: now,
+      ),
+      'Just now',
+    );
+  });
+
+  test('should_use_minutes_below_sixty_minutes', () {
+    expect(
+      formatRelativeDateTime(
+        now.subtract(const Duration(minutes: 59)),
+        l10n,
+        now: now,
+      ),
+      '59 min ago',
+    );
+  });
+
+  test('should_use_hours_below_twenty_four_hours', () {
+    expect(
+      formatRelativeDateTime(
+        now.subtract(const Duration(hours: 23)),
+        l10n,
+        now: now,
+      ),
+      '23 hours ago',
+    );
+  });
+
+  test('should_use_month_and_day_for_same_year', () {
+    expect(
+      formatRelativeDateTime(DateTime(2026, 9, 3), l10n, now: now),
+      '09-03',
+    );
+  });
+
+  test('should_use_full_date_for_previous_year', () {
+    expect(
+      formatRelativeDateTime(DateTime(2025, 12, 31), l10n, now: now),
+      '2025-12-31',
+    );
+  });
+}