feat: scan book to add to sell

lib/ui/sell_page/widgets/sell_choice_popup.dart

@@ -0,0 +1,64 @@
+import 'package:flutter/material.dart';
+import 'package:seshat/domain/models/book_stack.dart';
+import 'package:seshat/ui/sell_page/view_model/sell_view_model.dart';
+
+class SellChoicePopup extends StatelessWidget {
+  const SellChoicePopup({super.key, required this.viewModel});
+
+  final SellViewModel viewModel;
+
+  @override
+  Widget build(BuildContext context) {
+    return ListenableBuilder(
+      listenable: viewModel,
+      builder: (context, child) {
+        return AlertDialog(
+          title: Text("Choix du bon livre"),
+          content: switch (viewModel.isScanLoaded) {
+            false => SizedBox(
+              height: 300,
+              child: Center(child: CircularProgressIndicator()),
+            ),
+            true => SingleChildScrollView(
+              child: Column(
+                mainAxisSize: MainAxisSize.min,
+                children: [
+                  (viewModel.scannedBooks.isEmpty)
+                      ? Text(
+                          "Ce livre n'a jamais été rentré, ou vous l'avez déjà mis dans cette vente.",
+                        )
+                      : SizedBox(),
+                  for (BookStack book in viewModel.scannedBooks)
+                    Padding(
+                      padding: const EdgeInsets.symmetric(horizontal: 15),
+                      child: Card(
+                        child: InkWell(
+                          onTap: () {
+                            viewModel.sellBook(book);
+                            Navigator.of(context).pop();
+                            viewModel.showScan = false;
+                          },
+                          child: ListTile(
+                            leading: Text(
+                              "${book.instance.price.toString()}€",
+                              style: TextStyle(fontSize: 30),
+                            ),
+                            title: Text(
+                              "${book.book.title} · ${book.book.author}",
+                            ),
+                            subtitle: Text(
+                              "${book.owner.firstName} ${book.owner.lastName} (${book.shortId()})",
+                            ),
+                          ),
+                        ),
+                      ),
+                    ),
+                ],
+              ),
+            ),
+          },
+        );
+      },
+    );
+  }
+}