A whole bunch of changes

lib/widgets/image_source_sheet.dart

@@ -4,13 +4,46 @@ import 'package:image_picker/image_picker.dart';
 /// Bottom sheet letting the user pick a photo from the camera or their
 /// existing library. Shared by any screen that needs to snap or choose a
 /// photo (receipt capture, VIN scanning) so the choice looks and behaves
-/// the same everywhere.
-Future<ImageSource?> chooseImageSource(BuildContext context) {
+/// the same everywhere. Pass [heading] to label what the photo is for
+/// (e.g. receipt capture passes "Receipt From") — omitted by callers where
+/// that's already obvious from context. [onInfoTap], if given, adds an
+/// info button next to [heading] (e.g. VIN scanning uses it to explain
+/// where to find a VIN); ignored if [heading] is null, since there'd be
+/// nowhere to put it.
+Future<ImageSource?> chooseImageSource(
+  BuildContext context, {
+  String? heading,
+  VoidCallback? onInfoTap,
+}) {
   return showModalBottomSheet<ImageSource>(
     context: context,
     builder: (context) => SafeArea(
       child: Wrap(
         children: [
+          if (heading != null)
+            Padding(
+              padding: const EdgeInsets.fromLTRB(16, 8, 8, 4),
+              child: Row(
+                children: [
+                  Expanded(
+                    child: Text(
+                      heading,
+                      style: Theme.of(context)
+                          .textTheme
+                          .labelLarge
+                          ?.copyWith(color: Theme.of(context).colorScheme.onSurfaceVariant),
+                    ),
+                  ),
+                  if (onInfoTap != null)
+                    IconButton(
+                      icon: const Icon(Icons.info_outline),
+                      iconSize: 20,
+                      tooltip: 'Where do I find this?',
+                      onPressed: onInfoTap,
+                    ),
+                ],
+              ),
+            ),
           ListTile(
             leading: const Icon(Icons.camera_alt_outlined),
             title: const Text('Take Photo'),