refactor: Improved share / forward dialog

lib/utils/show_scaffold_dialog.dart

@@ -0,0 +1,36 @@
+import 'package:flutter/material.dart';
+
+import 'package:fluffychat/config/app_config.dart';
+import 'package:fluffychat/config/themes.dart';
+
+Future<void> showScaffoldDialog({
+  required BuildContext context,
+  Color? barrierColor,
+  Color? containerColor,
+  double maxWidth = 480,
+  double maxHeight = 720,
+  required Widget Function(BuildContext context) builder,
+}) =>
+    showDialog(
+      context: context,
+      builder: FluffyThemes.isColumnMode(context)
+          ? (context) => Center(
+                child: Container(
+                  decoration: BoxDecoration(
+                    borderRadius: BorderRadius.circular(
+                      AppConfig.borderRadius,
+                    ),
+                    color: containerColor ??
+                        Theme.of(context).scaffoldBackgroundColor,
+                  ),
+                  clipBehavior: Clip.hardEdge,
+                  margin: const EdgeInsets.all(16),
+                  constraints: BoxConstraints(
+                    maxWidth: maxWidth,
+                    maxHeight: maxHeight,
+                  ),
+                  child: builder(context),
+                ),
+              )
+          : builder,
+    );