feat:增加朋友圈评论显示模块

lib/widgets/moment/card.dart

@@ -33,6 +33,10 @@ class MomentCard extends StatelessWidget {
                 _buildTime(),
                 const SizedBox(height: 5),
                 _buildActionButtons(),
+                if (moment.commentList!.isNotEmpty) ...[
+                  const SizedBox(height: 8),
+                  _buildCommentList(),
+                ],
               ],
             ),
           ),
@@ -189,4 +193,55 @@ class MomentCard extends StatelessWidget {
       ],
     );
   }
+
+  Widget _buildCommentItem(Comment comment) {
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        RichText(
+          text: TextSpan(
+            children: [
+              TextSpan(
+                text: comment.username,
+                style: const TextStyle(
+                  fontWeight: FontWeight.bold,
+                  fontSize: 14,
+                  fontFamily: 'CustomFont',
+                  color: Colors.black,
+                ),
+              ),
+              const TextSpan(text: ': ', style: TextStyle(color: Colors.black)),
+              TextSpan(
+                text: comment.content,
+                style: const TextStyle(
+                  fontSize: 14,
+                  fontFamily: 'CustomFont',
+                  color: Colors.black87,
+                ),
+              ),
+            ],
+          ),
+        ),
+      ],
+    );
+  }
+
+  Widget _buildCommentList() {
+    return Container(
+      padding: const EdgeInsets.all(10),
+      decoration: BoxDecoration(
+        color: Colors.grey[100],
+        borderRadius: BorderRadius.circular(8),
+      ),
+      child: ListView.separated(
+        shrinkWrap: true,
+        physics: const NeverScrollableScrollPhysics(),
+        itemCount: moment.commentList!.length,
+        separatorBuilder: (context, index) => SizedBox(height: 8),
+        itemBuilder: (context, index) {
+          return _buildCommentItem(moment.commentList![index]);
+        },
+      ),
+    );
+  }
 }