feat: partially implement new ui widget

lib/ui/features/pdf/view_model/pdf_view_model.dart

@@ -0,0 +1,65 @@
+import 'dart:typed_data';
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:pdf_signature/data/repositories/document_repository.dart';
+import 'package:pdf_signature/data/repositories/signature_card_repository.dart';
+import 'package:pdf_signature/domain/models/model.dart';
+import 'package:pdfrx/pdfrx.dart';
+
+class PdfViewModel {
+  final Ref ref;
+
+  PdfViewModel(this.ref);
+
+  Document get document => ref.read(documentRepositoryProvider);
+
+  void jumpToPage(int page) {
+    ref.read(documentRepositoryProvider.notifier).jumpTo(page);
+  }
+
+  Future<void> openPdf({required String path, Uint8List? bytes}) async {
+    int pageCount = 1;
+    if (bytes != null) {
+      try {
+        final doc = await PdfDocument.openData(bytes);
+        pageCount = doc.pages.length;
+      } catch (_) {
+        // ignore
+      }
+    }
+    ref
+        .read(documentRepositoryProvider.notifier)
+        .openPicked(path: path, pageCount: pageCount, bytes: bytes);
+    ref.read(signatureCardProvider.notifier).clearAll();
+  }
+
+  Future<Uint8List?> loadSignatureFromFile() async {
+    // This would need file picker, but since it's UI logic, perhaps keep in widget
+    // For now, return null
+    return null;
+  }
+
+  void confirmSignature() {
+    // Need to implement based on original logic
+  }
+
+  void onDragSignature(Offset delta) {
+    // Implement drag
+  }
+
+  void onResizeSignature(Offset delta) {
+    // Implement resize
+  }
+
+  void onSelectPlaced(int? index) {
+    // ref.read(documentRepositoryProvider.notifier).selectPlacement(index);
+  }
+
+  Future<void> saveSignedPdf() async {
+    // Implement save logic
+  }
+}
+
+final pdfViewModelProvider = Provider<PdfViewModel>((ref) {
+  return PdfViewModel(ref);
+});

lib/ui/features/pdf/widgets/pdf_screen.dart

@@ -62,10 +62,9 @@ class _PdfSignatureHomePageState extends ConsumerState<PdfSignatureHomePage> {
       } catch (_) {
         bytes = null;
       }
-      ref
+      await ref
-          .read(documentRepositoryProvider.notifier)
+          .read(pdfViewModelProvider)
-          .openPicked(path: file.path, bytes: bytes);
+          .openPdf(path: file.path, bytes: bytes);
-      ref.read(signatureProvider.notifier).resetForNewPage();
     }
   }
 

lib/ui/features/preferences/view_model/preferences_view_model.dart

@@ -0,0 +1,13 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+class PreferencesViewModel {
+  final Ref ref;
+
+  PreferencesViewModel(this.ref);
+
+  // Add methods as needed
+}
+
+final preferencesViewModelProvider = Provider<PreferencesViewModel>((ref) {
+  return PreferencesViewModel(ref);
+});

lib/ui/features/signature/view_model/signature_view_model.dart

@@ -0,0 +1,13 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+class SignatureViewModel {
+  final Ref ref;
+
+  SignatureViewModel(this.ref);
+
+  // Add methods as needed
+}
+
+final signatureViewModelProvider = Provider<SignatureViewModel>((ref) {
+  return SignatureViewModel(ref);
+});

lib/ui/features/welcome/view_model/welcome_view_model.dart

@@ -0,0 +1,31 @@
+import 'dart:typed_data';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:pdf_signature/data/repositories/document_repository.dart';
+import 'package:pdf_signature/data/repositories/signature_card_repository.dart';
+import 'package:pdfrx/pdfrx.dart';
+
+class WelcomeViewModel {
+  final Ref ref;
+
+  WelcomeViewModel(this.ref);
+
+  Future<void> openPdf({required String path, Uint8List? bytes}) async {
+    int pageCount = 1; // default
+    if (bytes != null) {
+      try {
+        final doc = await PdfDocument.openData(bytes);
+        pageCount = doc.pages.length;
+      } catch (_) {
+        // ignore
+      }
+    }
+    ref
+        .read(documentRepositoryProvider.notifier)
+        .openPicked(path: path, pageCount: pageCount, bytes: bytes);
+    ref.read(signatureCardProvider.notifier).clearAll();
+  }
+}
+
+final welcomeViewModelProvider = Provider<WelcomeViewModel>((ref) {
+  return WelcomeViewModel(ref);
+});

lib/ui/features/welcome/widgets/welcome_screen.dart

@@ -6,10 +6,7 @@ import 'package:flutter/foundation.dart' show kIsWeb;
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:pdf_signature/l10n/app_localizations.dart';
-
+import 'package:pdf_signature/ui/features/welcome/view_model/welcome_view_model.dart';
-import 'package:pdf_signature/data/repositories/signature_card_repository.dart';
-import 'package:pdf_signature/data/repositories/document_repository.dart';
-// Settings dialog is provided via global AppBar in MyApp
 
 // Abstraction to make drop handling testable without constructing
 // platform-specific DropItem types in widget tests.
@@ -50,10 +47,7 @@ Future<void> handleDroppedFiles(
     bytes = null;
   }
   final String path = pdf.path ?? pdf.name;
-  read(
+  await read(welcomeViewModelProvider).openPdf(path: path, bytes: bytes);
-    documentRepositoryProvider.notifier,
-  ).openPicked(path: path, bytes: bytes);
-  read(signatureProvider.notifier).resetForNewPage();
 }
 
 class WelcomeScreen extends ConsumerStatefulWidget {
@@ -76,10 +70,9 @@ class _WelcomeScreenState extends ConsumerState<WelcomeScreen> {
       } catch (_) {
         bytes = null;
       }
-      ref
+      await ref
-          .read(documentRepositoryProvider.notifier)
+          .read(welcomeViewModelProvider)
-          .openPicked(path: file.path, bytes: bytes);
+          .openPdf(path: file.path, bytes: bytes);
-      ref.read(signatureProvider.notifier).resetForNewPage();
     }
   }