feat:增加闪灵上传图片功能

lib/widgets/flisp_widget.dart

@@ -98,26 +98,64 @@ Widget _buildFlispContent(Flisp flisp) {
   );
 }
 
-Widget _buildFlispImage(Flisp flisp) {
+Widget _buildDeleteImage(VoidCallback? onDelete) {
+  return Positioned(
+    top: -8,
+    right: 0,
+    child: GestureDetector(
+      onTap: onDelete,
+      child: Container(
+        width: 24,
+        height: 24,
+        decoration: BoxDecoration(
+          color: Colors.red,
+          shape: BoxShape.circle,
+          boxShadow: [
+            BoxShadow(
+              color: Colors.black.withAlpha(10),
+              blurRadius: 4,
+              offset: Offset(0, 2),
+            ),
+          ],
+        ),
+        child: Icon(Icons.close, color: Colors.white, size: 16),
+      ),
+    ),
+  );
+}
+
+Widget buildFlispImage({
+  required Flisp flisp,
+  bool showDelete = false,
+  VoidCallback? onDelete,
+}) {
   return Container(
-    height: 150,
+    height: 200,
     margin: const EdgeInsets.only(bottom: 8),
     decoration: BoxDecoration(
       borderRadius: BorderRadius.circular(8),
       image: DecorationImage(
         image: NetworkImage(flisp.imageUrl),
-        fit: BoxFit.cover,
+        fit: BoxFit.contain,
       ),
     ),
     child: Container(
       decoration: BoxDecoration(
         borderRadius: BorderRadius.circular(8),
-        color: Colors.black.withOpacity(0.3),
+        color: Colors.black.withAlpha(10),
       ),
-      alignment: Alignment.topRight,
-      child: const Padding(
-        padding: EdgeInsets.all(6.0),
-        child: Icon(Icons.image, color: Colors.white, size: 20),
+      child: Stack(
+        clipBehavior: Clip.none,
+        children: [
+          Align(
+            alignment: Alignment.topRight,
+            child: const Padding(
+              padding: EdgeInsets.all(6.0),
+              child: Icon(Icons.image, color: Colors.white, size: 20),
+            ),
+          ),
+          if (showDelete) _buildDeleteImage(onDelete),
+        ],
       ),
     ),
   );
@@ -253,7 +291,7 @@ Widget _buildFlispItem({
           children: [
             _buildFlispContent(flisp),
             const SizedBox(height: 8),
-            if (hasImage) _buildFlispImage(flisp),
+            if (hasImage) buildFlispImage(flisp: flisp, showDelete: false),
             const SizedBox(height: 4),
             if (hasVideo) _buildFlispVideo(flisp),
             const SizedBox(height: 4),