fix: 订阅删除按钮位置错误

lib/pages/subscription/widgets/item.dart

@@ -78,7 +78,9 @@ class VideoContent extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Expanded(
-      child: Padding(
+      child: Stack(
+        children: [
+          Padding(
             padding: const EdgeInsets.fromLTRB(10, 2, 6, 0),
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.start,
@@ -110,10 +112,13 @@ class VideoContent extends StatelessWidget {
                   ),
                 ),
                 const Spacer(),
-            Row(
-              mainAxisAlignment: MainAxisAlignment.end,
-              children: [
-                SizedBox(
+              ],
+            ),
+          ),
+          Positioned(
+            bottom: 0,
+            right: 0,
+            child: SizedBox(
               height: 35,
               width: 35,
               child: IconButton(
@@ -124,12 +129,10 @@ class VideoContent extends StatelessWidget {
                 ),
                 icon: const Icon(Icons.delete_outline, size: 18),
               ),
-                )
-              ],
-            )
-          ],
             ),
           ),
+        ],
+      ),
     );
   }
 }