fix：UI对齐demo

lib/features/news/presentation/news_detail_page.dart

@@ -52,7 +52,10 @@ class NewsDetailPage extends ConsumerWidget {
                         Row(
                           children: [
                             Container(
-                              padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
+                              padding: const EdgeInsets.symmetric(
+                                horizontal: 8,
+                                vertical: 3,
+                              ),
                               decoration: BoxDecoration(
                                 color: item.metal.color.withValues(alpha: 0.12),
                                 borderRadius: BorderRadius.circular(999),
@@ -69,14 +72,21 @@ class NewsDetailPage extends ConsumerWidget {
                             const SizedBox(width: 8),
                             Text(
                               '${item.source} · ${_timeLabel(item.publishedAt)}',
-                              style: TextStyle(fontSize: 12, color: cs.mutedForeground),
+                              style: TextStyle(
+                                fontSize: 12,
+                                color: cs.mutedForeground,
+                              ),
                             ),
                           ],
                         ),
                         const SizedBox(height: 12),
                         Text(
                           item.title,
-                          style: const TextStyle(fontSize: 18, fontWeight: FontWeight.w700, height: 1.4),
+                          style: const TextStyle(
+                            fontSize: 18,
+                            fontWeight: FontWeight.w700,
+                            height: 1.4,
+                          ),
                         ),
                         const SizedBox(height: 12),
                         for (final paragraph in item.body) ...[
@@ -90,10 +100,6 @@ class NewsDetailPage extends ConsumerWidget {
                           ),
                           const SizedBox(height: 12),
                         ],
-                        Text(
-                          '本资讯为原型示意内容，信息整理 · 非投资建议。',
-                          style: TextStyle(fontSize: 12, color: cs.mutedForeground, height: 1.5),
-                        ),
                       ],
                     ),
                   ),