Add sync status to app drawer

android/app/build.gradle.kts

@@ -11,12 +11,12 @@ android {
     ndkVersion = "27.2.12479018"
 
     compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_11
+        sourceCompatibility = JavaVersion.VERSION_17
-        targetCompatibility = JavaVersion.VERSION_11
+        targetCompatibility = JavaVersion.VERSION_17
     }
 
     kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_11.toString()
+        jvmTarget = JavaVersion.VERSION_17.toString()
     }
 
     defaultConfig {

android/build.gradle.kts

@@ -1,3 +1,13 @@
+subprojects {
+    afterEvaluate {
+        val android = project.extensions.findByName("android")
+        if (android is com.android.build.gradle.BaseExtension) {
+	    // Force the same sdk version everywhere
+            android.ndkVersion = "27.2.12479018"
+        }
+    }
+}
+
 allprojects {
     repositories {
         google()
@@ -19,3 +29,4 @@ subprojects {
 tasks.register<Delete>("clean") {
     delete(rootProject.layout.buildDirectory)
 }
+

android/settings.gradle.kts

@@ -18,7 +18,7 @@ pluginManagement {
 
 plugins {
     id("dev.flutter.flutter-plugin-loader") version "1.0.0"
-    id("com.android.application") version "8.7.3" apply false
+    id("com.android.application") version "8.9.1" apply false
     id("org.jetbrains.kotlin.android") version "2.1.0" apply false
 }
 

devenv.lock

@@ -3,10 +3,10 @@
     "devenv": {
       "locked": {
         "dir": "src/modules",
-        "lastModified": 1753981111,
+        "lastModified": 1770167382,
         "owner": "cachix",
         "repo": "devenv",
-        "rev": "d4d70df706b153b601a87ab8e81c88a0b1a373b6",
+        "rev": "195375e3f0a3c3ac4f12b21d3f59a7ddb209bd1f",
         "type": "github"
       },
       "original": {
@@ -19,14 +19,14 @@
     "flake-compat": {
       "flake": false,
       "locked": {
-        "lastModified": 1747046372,
+        "lastModified": 1767039857,
-        "owner": "edolstra",
+        "owner": "NixOS",
         "repo": "flake-compat",
-        "rev": "9100a0f413b0c601e0533d1d94ffd501ce2e7885",
+        "rev": "5edf11c44bc78a0d334f6334cdaf7d60d732daab",
         "type": "github"
       },
       "original": {
-        "owner": "edolstra",
+        "owner": "NixOS",
         "repo": "flake-compat",
         "type": "github"
       }
@@ -40,10 +40,10 @@
         ]
       },
       "locked": {
-        "lastModified": 1750779888,
+        "lastModified": 1769939035,
         "owner": "cachix",
         "repo": "git-hooks.nix",
-        "rev": "16ec914f6fb6f599ce988427d9d94efddf25fe6d",
+        "rev": "a8ca480175326551d6c4121498316261cbb5b260",
         "type": "github"
       },
       "original": {
@@ -60,10 +60,10 @@
         ]
       },
       "locked": {
-        "lastModified": 1709087332,
+        "lastModified": 1762808025,
         "owner": "hercules-ci",
         "repo": "gitignore.nix",
-        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
+        "rev": "cb5e3fdca1de58ccbc3ef53de65bd372b48f567c",
         "type": "github"
       },
       "original": {
@@ -74,10 +74,10 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1753939845,
+        "lastModified": 1770115704,
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "94def634a20494ee057c76998843c015909d6311",
+        "rev": "e6eae2ee2110f3d31110d5c222cd395303343b08",
         "type": "github"
       },
       "original": {

lib/api.dart

@@ -1,163 +0,0 @@
-import 'dart:convert';
-import 'dart:io';
-
-import 'package:flutter/foundation.dart';
-import 'package:http/http.dart' as http;
-import 'package:logging/logging.dart';
-import 'package:path_provider/path_provider.dart'; // For cache storage
-
-import 'sheet.dart';
-
-class ApiClient {
-  final log = Logger("ApiClient");
-  final String baseUrl;
-  String? token;
-
-  ApiClient({required this.baseUrl, this.token});
-
-  Future<void> login(String username, String password) async {
-    log.info("Logging in...");
-    final url = '$baseUrl/auth/login';
-    final response = await http.post(
-      Uri.parse(url),
-      headers: {'Content-Type': 'application/json'},
-      body: jsonEncode({'username': username, 'password': password}),
-    );
-
-    if (response.statusCode == 200) {
-      final responseData = jsonDecode(response.body);
-      token = responseData['token'];
-      log.info('Login successful');
-    } else {
-      throw Exception(
-        "Failed logging in: Response code ${response.statusCode}\nResponse: ${response.body}",
-      );
-    }
-  }
-
-  void logout() {
-    token = null;
-    log.info('Logged out successfully.');
-  }
-
-  Future<http.Response> get(
-    String endpoint, {
-    bool isBinary = false,
-    bool throwExceptionIfStatusCodeNot200 = false,
-  }) async {
-    final url = '$baseUrl$endpoint';
-    final headers = {
-      'Authorization': 'Bearer $token',
-      if (!isBinary) 'Content-Type': 'application/json',
-    };
-
-    final response = await http.get(Uri.parse(url), headers: headers);
-
-    if (!throwExceptionIfStatusCodeNot200 || response.statusCode == 200) {
-      return response;
-    } else {
-      log.warning(
-        "Failed get request to '$url'! StatusCode: ${response.statusCode}\nResponseBody: ${response.body}",
-      );
-      throw Exception(
-        'GET request failed: ${response.statusCode} ${response.body}',
-      );
-    }
-  }
-
-  Future<http.Response?> post(
-    String endpoint,
-    Map<String, dynamic> body,
-  ) async {
-    try {
-      final url = '$baseUrl$endpoint';
-      final headers = {
-        'Authorization': 'Bearer $token',
-        'Content-Type': 'application/json',
-      };
-
-      final response = await http.post(
-        Uri.parse(url),
-        headers: headers,
-        body: jsonEncode(body),
-      );
-
-      if (response.statusCode == 200 || response.statusCode == 201) {
-        return response;
-      } else {
-        log.info(
-          'POST request failed: ${response.statusCode} ${response.body}',
-        );
-      }
-    } catch (e) {
-      log.info('Error during POST request: $e');
-    }
-    return null;
-  }
-
-  Future<http.Response?> postFormData(String endpoint, String body) async {
-    try {
-      final url = '$baseUrl$endpoint';
-      final headers = {
-        'Authorization': 'Bearer $token',
-        'Content-Type': 'application/x-www-form-urlencoded',
-      };
-
-      final response = await http.post(
-        Uri.parse(url),
-        headers: headers,
-        body: body,
-      );
-
-      if (response.statusCode == 200 || response.statusCode == 201) {
-        return response;
-      } else {
-        log.info(
-          'POST Form Data request failed: ${response.statusCode} ${response.body}',
-        );
-      }
-    } catch (e) {
-      log.info('Error during POST Form Data request: $e');
-    }
-    return null;
-  }
-
-  Future<List<Sheet>> fetchSheets() async {
-    final response = await get(
-      "/api/sheets/list",
-      throwExceptionIfStatusCodeNot200: true,
-    );
-
-    final data = jsonDecode(response.body);
-    return (data['sheets'] as List<dynamic>)
-        .map((sheet) => Sheet.fromJson(sheet as Map<String, dynamic>))
-        .toList();
-  }
-
-  Future<Uint8List> fetchPdfFileData(String sheetUuid) async {
-    final response = await get(
-      '/api/sheets/get/$sheetUuid',
-      isBinary: true,
-      throwExceptionIfStatusCodeNot200: true,
-    );
-
-    log.info("PDF downloaded");
-    return response.bodyBytes;
-  }
-
-  Future<File> getPdfFileCached(String sheetUuid) async {
-    final cacheDir = await getTemporaryDirectory();
-    final cachedPdfPath = '${cacheDir.path}/$sheetUuid.pdf';
-
-    final cachedFile = File(cachedPdfPath);
-    if (await cachedFile.exists()) {
-      log.info("PDF found in cache: $cachedPdfPath");
-      return cachedFile;
-    }
-
-    final pdfFileData = await fetchPdfFileData(sheetUuid);
-    await cachedFile.writeAsBytes(pdfFileData);
-    log.info("PDF cached at: $cachedPdfPath");
-    return cachedFile;
-  }
-}

lib/app.dart

@@ -0,0 +1,23 @@
+import 'package:flutter/material.dart';
+
+import 'features/auth/login_page.dart';
+
+/// Global route observer for tracking navigation events.
+///
+/// Used by pages that need to respond to navigation changes
+final RouteObserver<ModalRoute> routeObserver = RouteObserver<ModalRoute>();
+
+/// The main Sheetless application widget.
+class SheetlessApp extends StatelessWidget {
+  const SheetlessApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Sheetless',
+      theme: ThemeData(useMaterial3: true, colorSchemeSeed: Colors.blue),
+      home: const LoginPage(),
+      navigatorObservers: [routeObserver],
+    );
+  }
+}

lib/bt_pedal_shortcuts.dart

@@ -1,42 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-
-class BtPedalShortcuts extends StatefulWidget {
-  final Widget child;
-  final VoidCallback? onTurnPageForward;
-  final VoidCallback? onTurnPageBackward;
-
-  const BtPedalShortcuts({
-    super.key,
-    required this.child,
-    this.onTurnPageForward,
-    this.onTurnPageBackward,
-  });
-
-  @override
-  State<BtPedalShortcuts> createState() => _BtPedalShortcutsState();
-}
-
-class _BtPedalShortcutsState extends State<BtPedalShortcuts> {
-  String lastAction = "Press pedal...";
-
-  @override
-  Widget build(BuildContext context) {
-    return CallbackShortcuts(
-      bindings: <ShortcutActivator, VoidCallback>{
-        // Shortcuts for page forward
-        const SingleActivator(LogicalKeyboardKey.arrowDown):
-            widget.onTurnPageForward ?? () => {},
-        const SingleActivator(LogicalKeyboardKey.arrowRight):
-            widget.onTurnPageForward ?? () => {},
-
-        // Shortcuts for page backward
-        const SingleActivator(LogicalKeyboardKey.arrowUp):
-            widget.onTurnPageBackward ?? () => {},
-        const SingleActivator(LogicalKeyboardKey.arrowLeft):
-            widget.onTurnPageBackward ?? () => {},
-      },
-      child: Focus(autofocus: true, child: widget.child),
-    );
-  }
-}

lib/core/models/change.dart

@@ -0,0 +1,110 @@
+import 'dart:collection';
+
+import 'sheet.dart';
+
+/// Types of changes that can be queued for server synchronization.
+enum ChangeType {
+  sheetNameChange,
+  composerNameChange,
+  addTagChange,
+  removeTagChange,
+}
+
+/// Represents a single pending change to be synced with the server.
+///
+/// Changes are stored locally when offline and applied once
+/// the device regains connectivity. Each change has a [createdAt] timestamp
+/// that the server uses to resolve conflicts between devices.
+class Change {
+  final ChangeType type;
+  final String sheetUuid;
+  final String value;
+  final DateTime createdAt;
+
+  Change({
+    required this.type,
+    required this.sheetUuid,
+    required this.value,
+    DateTime? createdAt,
+  }) : createdAt = createdAt ?? DateTime.now();
+
+  /// Serializes this change to a map for storage.
+  Map<String, dynamic> toMap() => {
+    'type': type.index,
+    'sheetUuid': sheetUuid,
+    'value': value,
+    'createdAt': createdAt.toIso8601String(),
+  };
+
+  /// Serializes this change to JSON for API requests.
+  Map<String, dynamic> toJson() => {
+    'type': type.name,
+    'sheetUuid': sheetUuid,
+    'value': value,
+    'createdAt': createdAt.toIso8601String(),
+  };
+
+  /// Deserializes a change from a stored map.
+  ///
+  /// Note: Adding new [ChangeType] values may cause issues with
+  /// previously stored changes that use index-based serialization.
+  factory Change.fromMap(Map<dynamic, dynamic> map) {
+    return Change(
+      type: ChangeType.values[map['type']],
+      sheetUuid: map['sheetUuid'],
+      value: map['value'],
+      createdAt: map['createdAt'] != null
+          ? DateTime.parse(map['createdAt'])
+          : DateTime.now(),
+    );
+  }
+}
+
+/// A queue of pending changes to be synchronized with the server.
+///
+/// Changes are stored in FIFO order (oldest first) and applied
+/// to sheets in sequence when syncing.
+class ChangeQueue {
+  final Queue<Change> _queue = Queue();
+
+  ChangeQueue();
+
+  /// Adds a change to the end of the queue.
+  void addChange(Change change) {
+    _queue.addLast(change);
+  }
+
+  /// Returns the number of pending changes.
+  int get length => _queue.length;
+
+  /// Whether the queue has any pending changes.
+  bool get isEmpty => _queue.isEmpty;
+
+  /// Whether the queue has pending changes.
+  bool get isNotEmpty => _queue.isNotEmpty;
+
+  /// Applies all queued changes to the provided list of sheets.
+  ///
+  /// Each change modifies the corresponding sheet's properties
+  /// based on the change type.
+  void applyToSheets(List<Sheet> sheets) {
+    for (final change in _queue) {
+      final sheet = sheets.firstWhere(
+        (s) => s.uuid == change.sheetUuid,
+        orElse: () =>
+            throw StateError('Sheet with UUID ${change.sheetUuid} not found'),
+      );
+
+      switch (change.type) {
+        case ChangeType.sheetNameChange:
+          sheet.name = change.value;
+        case ChangeType.composerNameChange:
+          sheet.composer = change.value;
+        case ChangeType.addTagChange:
+          throw UnimplementedError('Tag support not yet implemented');
+        case ChangeType.removeTagChange:
+          throw UnimplementedError('Tag support not yet implemented');
+      }
+    }
+  }
+}

lib/core/models/config.dart

@@ -0,0 +1,37 @@
+/// Application configuration model.
+///
+/// Stores user preferences that are persisted across sessions,
+/// such as display mode and fullscreen settings.
+class Config {
+  /// Storage keys for persistence
+  static const String keyTwoPageMode = 'twoPageMode';
+  static const String keyFullscreen = 'fullscreen';
+
+  /// Whether to display two pages side-by-side (for tablets/landscape).
+  bool twoPageMode;
+
+  /// Whether the app is in fullscreen mode.
+  bool fullscreen;
+
+  Config({
+    required this.twoPageMode,
+    required this.fullscreen,
+  });
+
+  /// Creates a default configuration with all options disabled.
+  factory Config.defaultConfig() => Config(
+        twoPageMode: false,
+        fullscreen: false,
+      );
+
+  /// Creates a copy of this config with optional overrides.
+  Config copyWith({
+    bool? twoPageMode,
+    bool? fullscreen,
+  }) {
+    return Config(
+      twoPageMode: twoPageMode ?? this.twoPageMode,
+      fullscreen: fullscreen ?? this.fullscreen,
+    );
+  }
+}

lib/core/models/sheet.dart

@@ -0,0 +1,35 @@
+/// Data model representing a sheet music document.
+///
+/// A [Sheet] contains metadata about a piece of sheet music,
+/// including its title, composer information, and timestamps.
+class Sheet {
+  final String uuid;
+  String name;
+  String composer;
+  DateTime updatedAt;
+
+  Sheet({
+    required this.uuid,
+    required this.name,
+    required this.composer,
+    required this.updatedAt,
+  });
+
+  /// Creates a [Sheet] from a JSON map returned by the API.
+  factory Sheet.fromJson(Map<String, dynamic> json) {
+    return Sheet(
+      uuid: json['uuid'],
+      name: json['title'],
+      composer: json['composer'],
+      updatedAt: DateTime.parse(json['updated_at']),
+    );
+  }
+
+  /// Converts this sheet to a JSON map for API requests.
+  Map<String, dynamic> toJson() => {
+    'uuid': uuid,
+    'title': name,
+    'composer': composer,
+    'updated_at': updatedAt.toIso8601String(),
+  };
+}

lib/core/services/annotation_sync_service.dart

@@ -0,0 +1,149 @@
+import 'package:logging/logging.dart';
+
+import 'api_client.dart';
+import 'storage_service.dart';
+
+/// Service for synchronizing annotations between local storage and server.
+///
+/// Handles downloading annotations on sheet open and uploading on save,
+/// comparing timestamps to determine which version is newer.
+class AnnotationSyncService {
+  final _log = Logger('AnnotationSyncService');
+  final ApiClient _apiClient;
+  final StorageService _storageService;
+
+  AnnotationSyncService({
+    required ApiClient apiClient,
+    required StorageService storageService,
+  })  : _apiClient = apiClient,
+        _storageService = storageService;
+
+  /// Downloads annotations from server and merges with local storage.
+  ///
+  /// For each page, compares server's lastModified with local lastModified.
+  /// If server is newer, overwrites local. Local annotations that are newer
+  /// are preserved.
+  Future<void> syncFromServer(String sheetUuid) async {
+    try {
+      _log.info('Syncing annotations from server for sheet $sheetUuid');
+
+      // Fetch all annotations from server
+      final serverAnnotations = await _apiClient.fetchAnnotations(sheetUuid);
+
+      // Get all local annotations with metadata
+      final localAnnotations =
+          await _storageService.readAllAnnotationsWithMetadata(sheetUuid);
+
+      int updatedCount = 0;
+
+      // Process each server annotation
+      for (final serverAnnotation in serverAnnotations) {
+        final page = serverAnnotation.page;
+        final localAnnotation = localAnnotations[page];
+
+        bool shouldUpdate = false;
+
+        if (localAnnotation == null) {
+          // No local annotation - use server version
+          shouldUpdate = true;
+          _log.fine('Page $page: No local annotation, using server version');
+        } else if (serverAnnotation.lastModified.isAfter(
+          localAnnotation.lastModified,
+        )) {
+          // Server is newer - overwrite local
+          shouldUpdate = true;
+          _log.fine(
+            'Page $page: Server is newer '
+            '(server: ${serverAnnotation.lastModified}, '
+            'local: ${localAnnotation.lastModified})',
+          );
+        } else {
+          _log.fine(
+            'Page $page: Local is newer or same, keeping local version',
+          );
+        }
+
+        if (shouldUpdate) {
+          await _storageService.writeAnnotationsWithMetadata(
+            sheetUuid,
+            page,
+            serverAnnotation.annotationsJson,
+            serverAnnotation.lastModified,
+          );
+          updatedCount++;
+        }
+      }
+
+      _log.info(
+        'Sync complete: $updatedCount pages updated from server '
+        '(${serverAnnotations.length} total on server)',
+      );
+    } on ApiException catch (e) {
+      _log.warning('Failed to sync annotations from server: $e');
+    } catch (e) {
+      _log.warning('Unexpected error syncing annotations: $e');
+    }
+  }
+
+  /// Uploads a single page's annotation to the server.
+  ///
+  /// Called when annotations are saved (e.g., exiting paint mode).
+  /// If upload fails (e.g., offline), the annotation is queued for later sync.
+  Future<bool> uploadAnnotation({
+    required String sheetUuid,
+    required int page,
+    required String annotationsJson,
+    required DateTime lastModified,
+  }) async {
+    try {
+      _log.info('Uploading annotation for sheet $sheetUuid page $page');
+
+      await _apiClient.uploadAnnotation(
+        sheetUuid: sheetUuid,
+        page: page,
+        lastModified: lastModified,
+        annotationsJson: annotationsJson,
+      );
+
+      _log.info('Upload successful');
+      return true;
+    } on ApiException catch (e) {
+      _log.warning('Failed to upload annotation, queuing for later: $e');
+      await _queueForLaterUpload(
+        sheetUuid: sheetUuid,
+        page: page,
+        annotationsJson: annotationsJson,
+        lastModified: lastModified,
+      );
+      return false;
+    } catch (e) {
+      _log.warning(
+          'Unexpected error uploading annotation, queuing for later: $e');
+      await _queueForLaterUpload(
+        sheetUuid: sheetUuid,
+        page: page,
+        annotationsJson: annotationsJson,
+        lastModified: lastModified,
+      );
+      return false;
+    }
+  }
+
+  /// Queues an annotation for later upload when connection is restored.
+  Future<void> _queueForLaterUpload({
+    required String sheetUuid,
+    required int page,
+    required String annotationsJson,
+    required DateTime lastModified,
+  }) async {
+    await _storageService.writePendingAnnotationUpload(
+      PendingAnnotationUpload(
+        sheetUuid: sheetUuid,
+        page: page,
+        annotationsJson: annotationsJson,
+        lastModified: lastModified,
+      ),
+    );
+    _log.info('Annotation queued for later upload: $sheetUuid page $page');
+  }
+}

lib/core/services/api_client.dart

@@ -0,0 +1,294 @@
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:flutter/foundation.dart';
+import 'package:http/http.dart' as http;
+import 'package:logging/logging.dart';
+import 'package:path_provider/path_provider.dart';
+
+import '../models/change.dart';
+import '../models/sheet.dart';
+
+/// HTTP client for communicating with the Sheetless API server.
+///
+/// Handles authentication, sheet listing, and PDF downloads.
+/// Provides caching for PDF files on native platforms.
+class ApiClient {
+  final _log = Logger('ApiClient');
+  final String baseUrl;
+  String? token;
+
+  ApiClient({required this.baseUrl, this.token});
+
+  /// Whether the client has an authentication token set.
+  bool get isAuthenticated => token != null;
+
+  // ---------------------------------------------------------------------------
+  // Authentication
+  // ---------------------------------------------------------------------------
+
+  /// Authenticates with the server and stores the JWT token.
+  ///
+  /// Throws an [Exception] if login fails.
+  Future<void> login(String username, String password) async {
+    _log.info('Logging in...');
+    final url = Uri.parse('$baseUrl/auth/login');
+
+    final response = await http.post(
+      url,
+      headers: {'Content-Type': 'application/json'},
+      body: jsonEncode({'username': username, 'password': password}),
+    );
+
+    if (response.statusCode == 200) {
+      final responseData = jsonDecode(response.body);
+      token = responseData['token'];
+      _log.info('Login successful');
+    } else {
+      throw ApiException(
+        'Login failed',
+        statusCode: response.statusCode,
+        body: response.body,
+      );
+    }
+  }
+
+  /// Clears the authentication token.
+  void logout() {
+    token = null;
+    _log.info('Logged out successfully');
+  }
+
+  // ---------------------------------------------------------------------------
+  // HTTP Helpers
+  // ---------------------------------------------------------------------------
+
+  Map<String, String> _buildHeaders({bool isBinary = false}) {
+    return {
+      'Authorization': 'Bearer $token',
+      if (!isBinary) 'Content-Type': 'application/json',
+    };
+  }
+
+  /// Performs a GET request to the given endpoint.
+  Future<http.Response> get(String endpoint, {bool isBinary = false}) async {
+    final url = Uri.parse('$baseUrl$endpoint');
+    final response = await http.get(
+      url,
+      headers: _buildHeaders(isBinary: isBinary),
+    );
+
+    if (response.statusCode != 200) {
+      _log.warning(
+        "GET '$endpoint' failed: ${response.statusCode}\n${response.body}",
+      );
+      throw ApiException(
+        'GET request failed',
+        statusCode: response.statusCode,
+        body: response.body,
+      );
+    }
+
+    return response;
+  }
+
+  /// Performs a POST request with JSON body.
+  Future<http.Response> post(String endpoint, Map<String, dynamic> body) async {
+    final url = Uri.parse('$baseUrl$endpoint');
+
+    final response = await http.post(
+      url,
+      headers: _buildHeaders(),
+      body: jsonEncode(body),
+    );
+
+    if (response.statusCode != 200 && response.statusCode != 201) {
+      _log.warning(
+        "POST '$endpoint' failed: ${response.statusCode}\n${response.body}",
+      );
+      throw ApiException(
+        'POST request failed',
+        statusCode: response.statusCode,
+        body: response.body,
+      );
+    }
+
+    return response;
+  }
+
+  /// Performs a POST request with form-encoded body.
+  Future<http.Response> postFormData(String endpoint, String body) async {
+    final url = Uri.parse('$baseUrl$endpoint');
+
+    final response = await http.post(
+      url,
+      headers: {
+        'Authorization': 'Bearer $token',
+        'Content-Type': 'application/x-www-form-urlencoded',
+      },
+      body: body,
+    );
+
+    if (response.statusCode != 200 && response.statusCode != 201) {
+      _log.warning(
+        "POST Form '$endpoint' failed: ${response.statusCode}\n${response.body}",
+      );
+      throw ApiException(
+        'POST Form request failed',
+        statusCode: response.statusCode,
+        body: response.body,
+      );
+    }
+
+    return response;
+  }
+
+  // ---------------------------------------------------------------------------
+  // Sheet Operations
+  // ---------------------------------------------------------------------------
+
+  /// Fetches the list of all sheets from the server.
+  Future<List<Sheet>> fetchSheets() async {
+    final response = await get('/api/sheets/list');
+    final data = jsonDecode(response.body);
+
+    return (data['sheets'] as List<dynamic>)
+        .map((sheet) => Sheet.fromJson(sheet as Map<String, dynamic>))
+        .toList();
+  }
+
+  /// Downloads PDF data for a sheet.
+  ///
+  /// Returns the raw PDF bytes. For caching, use [getPdfFileCached] instead.
+  Future<Uint8List> fetchPdfData(String sheetUuid) async {
+    final response = await get('/api/sheets/get/$sheetUuid', isBinary: true);
+    _log.info('PDF downloaded for sheet $sheetUuid');
+    return response.bodyBytes;
+  }
+
+  /// Gets a cached PDF file for a sheet, downloading if necessary.
+  ///
+  /// On web platforms, use [fetchPdfData] instead as file caching
+  /// is not supported.
+  Future<File> getPdfFileCached(String sheetUuid) async {
+    final cacheDir = await getTemporaryDirectory();
+    final cachedFile = File('${cacheDir.path}/$sheetUuid.pdf');
+
+    if (await cachedFile.exists()) {
+      _log.info('PDF found in cache: ${cachedFile.path}');
+      return cachedFile;
+    }
+
+    final pdfData = await fetchPdfData(sheetUuid);
+    await cachedFile.writeAsBytes(pdfData);
+    _log.info('PDF cached at: ${cachedFile.path}');
+    return cachedFile;
+  }
+
+  // ---------------------------------------------------------------------------
+  // Annotation Operations
+  // ---------------------------------------------------------------------------
+
+  /// Fetches all annotations for a sheet from the server.
+  ///
+  /// Returns a list of [ServerAnnotation] objects containing page number,
+  /// lastModified timestamp, and the annotations JSON string.
+  Future<List<ServerAnnotation>> fetchAnnotations(String sheetUuid) async {
+    final response = await get('/api/sheets/$sheetUuid/annotations');
+    final data = jsonDecode(response.body) as List<dynamic>;
+
+    return data
+        .map((item) => ServerAnnotation.fromJson(item as Map<String, dynamic>))
+        .toList();
+  }
+
+  /// Uploads annotations for a specific page of a sheet.
+  ///
+  /// The [lastModified] should be the current time when the annotation was saved.
+  Future<void> uploadAnnotation({
+    required String sheetUuid,
+    required int page,
+    required DateTime lastModified,
+    required String annotationsJson,
+  }) async {
+    await post('/api/sheets/$sheetUuid/annotations', {
+      'page': page,
+      'lastModified': lastModified.toIso8601String(),
+      'annotations': annotationsJson,
+    });
+    _log.info('Annotation uploaded for sheet $sheetUuid page $page');
+  }
+
+  // ---------------------------------------------------------------------------
+  // Change Sync Operations
+  // ---------------------------------------------------------------------------
+
+  /// Uploads a batch of changes to the server.
+  ///
+  /// The server will apply changes based on their [createdAt] timestamps,
+  /// using the newest change for each field when resolving conflicts.
+  ///
+  /// Returns the list of change indices that were successfully applied.
+  /// Throws [ApiException] if the request fails (e.g., offline).
+  Future<List<int>> uploadChanges(List<Change> changes) async {
+    if (changes.isEmpty) return [];
+
+    final response = await post('/api/changes/sync', {
+      'changes': changes.map((c) => c.toJson()).toList(),
+    });
+
+    final data = jsonDecode(response.body);
+    final applied = (data['applied'] as List<dynamic>).cast<int>();
+    _log.info('Uploaded ${changes.length} changes, ${applied.length} applied');
+    return applied;
+  }
+
+  /// Checks if the server is reachable.
+  ///
+  /// Returns true if the server responds, false otherwise.
+  Future<bool> checkConnection() async {
+    try {
+      final url = Uri.parse('$baseUrl/api/health');
+      final response = await http
+          .get(url, headers: _buildHeaders())
+          .timeout(const Duration(seconds: 5));
+      return response.statusCode == 200;
+    } catch (e) {
+      _log.fine('Connection check failed: $e');
+      return false;
+    }
+  }
+}
+
+/// Represents an annotation from the server.
+class ServerAnnotation {
+  final int page;
+  final DateTime lastModified;
+  final String annotationsJson;
+
+  ServerAnnotation({
+    required this.page,
+    required this.lastModified,
+    required this.annotationsJson,
+  });
+
+  factory ServerAnnotation.fromJson(Map<String, dynamic> json) {
+    return ServerAnnotation(
+      page: json['page'] as int,
+      lastModified: DateTime.parse(json['lastModified'] as String),
+      annotationsJson: json['annotations'] as String,
+    );
+  }
+}
+
+/// Exception thrown when an API request fails.
+class ApiException implements Exception {
+  final String message;
+  final int statusCode;
+  final String body;
+
+  ApiException(this.message, {required this.statusCode, required this.body});
+
+  @override
+  String toString() => 'ApiException: $message (status: $statusCode)\n$body';
+}

lib/core/services/storage_service.dart

@@ -0,0 +1,429 @@
+import 'dart:convert';
+
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+import 'package:hive/hive.dart';
+import 'package:sheetless/core/models/change.dart';
+import 'package:sheetless/core/models/config.dart';
+import 'package:sheetless/core/models/sheet.dart';
+
+/// Keys for secure storage (credentials and tokens).
+enum SecureStorageKey { url, jwt, email }
+
+/// Data class for storing annotations with metadata.
+class StoredAnnotation {
+  final String annotationsJson;
+  final DateTime lastModified;
+
+  StoredAnnotation({required this.annotationsJson, required this.lastModified});
+
+  Map<String, dynamic> toMap() => {
+    'annotationsJson': annotationsJson,
+    'lastModified': lastModified.toIso8601String(),
+  };
+
+  factory StoredAnnotation.fromMap(Map<dynamic, dynamic> map) {
+    return StoredAnnotation(
+      annotationsJson: map['annotationsJson'] as String,
+      lastModified: DateTime.parse(map['lastModified'] as String),
+    );
+  }
+}
+
+/// Service for managing local storage operations.
+///
+/// Uses [FlutterSecureStorage] for sensitive data (credentials, tokens)
+/// and [Hive] for general app data (config, sheet access times, change queue,
+/// and PDF annotations).
+/// Data class for a pending annotation upload.
+class PendingAnnotationUpload {
+  final String sheetUuid;
+  final int page;
+  final String annotationsJson;
+  final DateTime lastModified;
+
+  PendingAnnotationUpload({
+    required this.sheetUuid,
+    required this.page,
+    required this.annotationsJson,
+    required this.lastModified,
+  });
+
+  Map<String, dynamic> toMap() => {
+    'sheetUuid': sheetUuid,
+    'page': page,
+    'annotationsJson': annotationsJson,
+    'lastModified': lastModified.toIso8601String(),
+  };
+
+  factory PendingAnnotationUpload.fromMap(Map<dynamic, dynamic> map) {
+    return PendingAnnotationUpload(
+      sheetUuid: map['sheetUuid'] as String,
+      page: map['page'] as int,
+      annotationsJson: map['annotationsJson'] as String,
+      lastModified: DateTime.parse(map['lastModified'] as String),
+    );
+  }
+
+  /// Unique key for deduplication (newer uploads replace older ones).
+  String get key => '${sheetUuid}_page_$page';
+}
+
+/// Service for managing local storage operations.
+///
+/// Uses [FlutterSecureStorage] for sensitive data (credentials, tokens)
+/// and [Hive] for general app data (config, sheet access times, change queue,
+/// and PDF annotations).
+class StorageService {
+  // Hive box names
+  static const String _sheetAccessTimesBox = 'sheetAccessTimes';
+  static const String _configBox = 'config';
+  static const String _changeQueueBox = 'changeQueue';
+  static const String _annotationsBox = 'annotations';
+  static const String _sheetsBox = 'sheets';
+  static const String _pendingAnnotationsBox = 'pendingAnnotations';
+
+  late final FlutterSecureStorage _secureStorage;
+
+  StorageService() {
+    _secureStorage = FlutterSecureStorage();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Secure Storage (Credentials & Tokens)
+  // ---------------------------------------------------------------------------
+
+  /// Reads a value from secure storage.
+  Future<String?> readSecure(SecureStorageKey key) {
+    return _secureStorage.read(key: key.name);
+  }
+
+  /// Writes a value to secure storage.
+  ///
+  /// Pass `null` to delete the key.
+  Future<void> writeSecure(SecureStorageKey key, String? value) {
+    return _secureStorage.write(key: key.name, value: value);
+  }
+
+  /// Clears all user data except URL and email.
+  ///
+  /// Called on logout to ensure a clean state for the next user,
+  /// while preserving server URL and email for convenience.
+  Future<void> clearAllUserData() async {
+    // Clear JWT token
+    await writeSecure(SecureStorageKey.jwt, null);
+
+    // Clear all Hive boxes
+    final sheetAccessTimesBox = await Hive.openBox(_sheetAccessTimesBox);
+    await sheetAccessTimesBox.clear();
+
+    final configBox = await Hive.openBox(_configBox);
+    await configBox.clear();
+
+    final changeQueueBox = await Hive.openBox(_changeQueueBox);
+    await changeQueueBox.clear();
+
+    final annotationsBox = await Hive.openBox(_annotationsBox);
+    await annotationsBox.clear();
+
+    final sheetsBox = await Hive.openBox(_sheetsBox);
+    await sheetsBox.clear();
+
+    final pendingAnnotationsBox = await Hive.openBox(_pendingAnnotationsBox);
+    await pendingAnnotationsBox.clear();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Config
+  // ---------------------------------------------------------------------------
+
+  /// Reads the app configuration from storage.
+  Future<Config> readConfig() async {
+    final box = await Hive.openBox(_configBox);
+    return Config(
+      twoPageMode: box.get(Config.keyTwoPageMode) ?? false,
+      fullscreen: box.get(Config.keyFullscreen) ?? false,
+    );
+  }
+
+  /// Writes the app configuration to storage.
+  Future<void> writeConfig(Config config) async {
+    final box = await Hive.openBox(_configBox);
+    await box.put(Config.keyTwoPageMode, config.twoPageMode);
+    await box.put(Config.keyFullscreen, config.fullscreen);
+  }
+
+  // ---------------------------------------------------------------------------
+  // Sheet Access Times (for sorting by recency)
+  // ---------------------------------------------------------------------------
+
+  /// Reads all sheet access times.
+  ///
+  /// Returns a map of sheet UUID to last access time.
+  Future<Map<String, DateTime>> readSheetAccessTimes() async {
+    final box = await Hive.openBox(_sheetAccessTimesBox);
+    return box.toMap().map(
+      (key, value) => MapEntry(key as String, DateTime.parse(value as String)),
+    );
+  }
+
+  /// Records when a sheet was last accessed.
+  Future<void> writeSheetAccessTime(String uuid, DateTime datetime) async {
+    final box = await Hive.openBox(_sheetAccessTimesBox);
+    await box.put(uuid, datetime.toIso8601String());
+  }
+
+  // ---------------------------------------------------------------------------
+  // Change Queue (Offline Sync)
+  // ---------------------------------------------------------------------------
+
+  /// Adds a change to the offline queue.
+  Future<void> writeChange(Change change) async {
+    final box = await Hive.openBox(_changeQueueBox);
+    await box.add(change.toMap());
+  }
+
+  /// Reads all pending changes from the queue.
+  Future<ChangeQueue> readChangeQueue() async {
+    final box = await Hive.openBox(_changeQueueBox);
+    final queue = ChangeQueue();
+
+    for (final map in box.values) {
+      queue.addChange(Change.fromMap(map as Map<dynamic, dynamic>));
+    }
+
+    return queue;
+  }
+
+  /// Removes the oldest change from the queue.
+  ///
+  /// Call this after successfully syncing a change to the server.
+  Future<void> deleteOldestChange() async {
+    final box = await Hive.openBox(_changeQueueBox);
+    if (box.isNotEmpty) {
+      await box.deleteAt(0);
+    }
+  }
+
+  // ---------------------------------------------------------------------------
+  // Annotations (PDF Drawing Persistence)
+  // ---------------------------------------------------------------------------
+
+  /// Generates a storage key for a specific page's annotations.
+  String _annotationKey(String sheetUuid, int pageNumber) {
+    return '${sheetUuid}_page_$pageNumber';
+  }
+
+  /// Reads annotations for a specific sheet page.
+  ///
+  /// Returns the JSON string of annotations, or null if none exist.
+  Future<String?> readAnnotations(String sheetUuid, int pageNumber) async {
+    final box = await Hive.openBox(_annotationsBox);
+    final value = box.get(_annotationKey(sheetUuid, pageNumber));
+
+    // Handle legacy format (plain string) and new format (map with metadata)
+    if (value == null) return null;
+    if (value is String) return value;
+    if (value is Map) {
+      final stored = StoredAnnotation.fromMap(value);
+      return stored.annotationsJson;
+    }
+    return null;
+  }
+
+  /// Writes annotations with a specific lastModified timestamp.
+  ///
+  /// Used when syncing from server to preserve server's timestamp.
+  Future<void> writeAnnotationsWithMetadata(
+    String sheetUuid,
+    int pageNumber,
+    String? annotationsJson,
+    DateTime lastModified,
+  ) async {
+    final box = await Hive.openBox(_annotationsBox);
+    final key = _annotationKey(sheetUuid, pageNumber);
+
+    if (annotationsJson == null || annotationsJson.isEmpty) {
+      await box.delete(key);
+    } else {
+      final stored = StoredAnnotation(
+        annotationsJson: annotationsJson,
+        lastModified: lastModified,
+      );
+      await box.put(key, stored.toMap());
+    }
+  }
+
+  /// Reads all annotations for a sheet (all pages).
+  ///
+  /// Returns a map of page number to JSON string.
+  Future<Map<int, String>> readAllAnnotations(String sheetUuid) async {
+    final box = await Hive.openBox(_annotationsBox);
+    final prefix = '${sheetUuid}_page_';
+    final result = <int, String>{};
+
+    for (final key in box.keys) {
+      if (key is String && key.startsWith(prefix)) {
+        final pageStr = key.substring(prefix.length);
+        final pageNumber = int.tryParse(pageStr);
+        if (pageNumber != null) {
+          final value = box.get(key);
+          if (value != null) {
+            // Handle legacy format (plain string) and new format (map)
+            if (value is String && value.isNotEmpty) {
+              result[pageNumber] = value;
+            } else if (value is Map) {
+              final stored = StoredAnnotation.fromMap(value);
+              if (stored.annotationsJson.isNotEmpty) {
+                result[pageNumber] = stored.annotationsJson;
+              }
+            }
+          }
+        }
+      }
+    }
+
+    return result;
+  }
+
+  /// Reads all annotations with metadata for a sheet (all pages).
+  ///
+  /// Returns a map of page number to [StoredAnnotation].
+  Future<Map<int, StoredAnnotation>> readAllAnnotationsWithMetadata(
+    String sheetUuid,
+  ) async {
+    final box = await Hive.openBox(_annotationsBox);
+    final prefix = '${sheetUuid}_page_';
+    final result = <int, StoredAnnotation>{};
+
+    for (final key in box.keys) {
+      if (key is String && key.startsWith(prefix)) {
+        final pageStr = key.substring(prefix.length);
+        final pageNumber = int.tryParse(pageStr);
+        if (pageNumber != null) {
+          final value = box.get(key);
+          if (value != null) {
+            StoredAnnotation? stored;
+            // Handle legacy format (plain string) and new format (map)
+            if (value is String && value.isNotEmpty) {
+              stored = StoredAnnotation(
+                annotationsJson: value,
+                lastModified: DateTime.fromMillisecondsSinceEpoch(0),
+              );
+            } else if (value is Map) {
+              stored = StoredAnnotation.fromMap(value);
+            }
+            if (stored != null && stored.annotationsJson.isNotEmpty) {
+              result[pageNumber] = stored;
+            }
+          }
+        }
+      }
+    }
+
+    return result;
+  }
+
+  /// Deletes all annotations for a sheet.
+  Future<void> deleteAllAnnotations(String sheetUuid) async {
+    final box = await Hive.openBox(_annotationsBox);
+    final prefix = '${sheetUuid}_page_';
+    final keysToDelete = box.keys.where(
+      (key) => key is String && key.startsWith(prefix),
+    );
+
+    for (final key in keysToDelete.toList()) {
+      await box.delete(key);
+    }
+  }
+
+  // ---------------------------------------------------------------------------
+  // Sheets Cache (Offline Support)
+  // ---------------------------------------------------------------------------
+
+  /// Reads cached sheets from local storage.
+  ///
+  /// Returns an empty list if no cached sheets exist.
+  Future<List<Sheet>> readCachedSheets() async {
+    final box = await Hive.openBox(_sheetsBox);
+    final sheetsJson = box.get('sheets');
+
+    if (sheetsJson == null) return [];
+
+    final List<dynamic> sheetsList = jsonDecode(sheetsJson as String);
+    return sheetsList
+        .map((json) => Sheet.fromJson(json as Map<String, dynamic>))
+        .toList();
+  }
+
+  /// Caches the sheets list to local storage.
+  Future<void> writeCachedSheets(List<Sheet> sheets) async {
+    final box = await Hive.openBox(_sheetsBox);
+    final sheetsJson = jsonEncode(sheets.map((s) => s.toJson()).toList());
+    await box.put('sheets', sheetsJson);
+  }
+
+  // ---------------------------------------------------------------------------
+  // Pending Annotation Uploads (Offline Support)
+  // ---------------------------------------------------------------------------
+
+  /// Adds or updates a pending annotation upload.
+  ///
+  /// If an upload for the same sheet/page already exists, it will be replaced
+  /// with the newer version.
+  Future<void> writePendingAnnotationUpload(
+    PendingAnnotationUpload upload,
+  ) async {
+    final box = await Hive.openBox(_pendingAnnotationsBox);
+    await box.put(upload.key, upload.toMap());
+  }
+
+  /// Reads all pending annotation uploads.
+  Future<List<PendingAnnotationUpload>> readPendingAnnotationUploads() async {
+    final box = await Hive.openBox(_pendingAnnotationsBox);
+    final uploads = <PendingAnnotationUpload>[];
+
+    for (final value in box.values) {
+      uploads.add(PendingAnnotationUpload.fromMap(value as Map));
+    }
+
+    return uploads;
+  }
+
+  /// Removes a pending annotation upload after successful sync.
+  Future<void> deletePendingAnnotationUpload(String key) async {
+    final box = await Hive.openBox(_pendingAnnotationsBox);
+    await box.delete(key);
+  }
+
+  /// Checks if there are any pending annotation uploads.
+  Future<bool> hasPendingAnnotationUploads() async {
+    final box = await Hive.openBox(_pendingAnnotationsBox);
+    return box.isNotEmpty;
+  }
+
+  // ---------------------------------------------------------------------------
+  // Change Queue Enhancements
+  // ---------------------------------------------------------------------------
+
+  /// Returns the number of pending changes.
+  Future<int> getChangeQueueLength() async {
+    final box = await Hive.openBox(_changeQueueBox);
+    return box.length;
+  }
+
+  /// Clears all pending changes.
+  ///
+  /// Use with caution - only call after all changes are synced.
+  Future<void> clearChangeQueue() async {
+    final box = await Hive.openBox(_changeQueueBox);
+    await box.clear();
+  }
+
+  /// Gets all changes as a list (for batch upload).
+  Future<List<Change>> readChangeList() async {
+    final box = await Hive.openBox(_changeQueueBox);
+    return box.values
+        .map((map) => Change.fromMap(map as Map<dynamic, dynamic>))
+        .toList();
+  }
+}

lib/core/services/sync_service.dart

@@ -0,0 +1,292 @@
+import 'package:logging/logging.dart';
+
+import '../models/change.dart';
+import '../models/sheet.dart';
+import 'api_client.dart';
+import 'storage_service.dart';
+
+/// Result of a sync operation.
+class SyncResult {
+  final List<Sheet> sheets;
+  final bool isOnline;
+  final int changesSynced;
+  final int annotationsSynced;
+  final int changesUnsynced;
+  final int annotationsUnsynced;
+
+  SyncResult({
+    required this.sheets,
+    required this.isOnline,
+    required this.changesSynced,
+    required this.annotationsSynced,
+    required this.changesUnsynced,
+    required this.annotationsUnsynced,
+  });
+}
+
+/// Service for coordinating offline/online synchronization.
+///
+/// Handles:
+/// - Fetching sheets with offline fallback to cached data
+/// - Uploading pending changes when connection is available
+/// - Uploading pending annotation uploads
+/// - Applying local changes to sheets list
+class SyncService {
+  final _log = Logger('SyncService');
+  final ApiClient _apiClient;
+  final StorageService _storageService;
+
+  SyncService({
+    required ApiClient apiClient,
+    required StorageService storageService,
+  }) : _apiClient = apiClient,
+       _storageService = storageService;
+
+  /// Performs a full sync operation.
+  ///
+  /// 1. Checks if online
+  /// 2. If online: fetches sheets, uploads pending changes, uploads pending annotations
+  /// 3. If offline: loads cached sheets and applies pending changes locally
+  ///
+  /// Returns [SyncResult] with the sheets list and sync status.
+  Future<SyncResult> sync() async {
+    final isOnline = await _apiClient.checkConnection();
+
+    if (isOnline) {
+      return _syncOnline();
+    } else {
+      return _syncOffline();
+    }
+  }
+
+  /// Online sync: fetch from server, upload pending data.
+  Future<SyncResult> _syncOnline() async {
+    _log.info('Online sync starting...');
+
+    int changesSynced = 0;
+    int annotationsSynced = 0;
+
+    // 1. Fetch fresh sheets from server
+    List<Sheet> sheets;
+    try {
+      sheets = await _apiClient.fetchSheets();
+      _log.info('Fetched ${sheets.length} sheets from server');
+
+      // Cache the fetched sheets
+      await _storageService.writeCachedSheets(sheets);
+    } catch (e) {
+      _log.warning('Failed to fetch sheets, falling back to cache: $e');
+      return _syncOffline();
+    }
+
+    // 2. Upload pending changes
+    changesSynced = await _uploadPendingChanges();
+
+    // 3. Upload pending annotations
+    annotationsSynced = await _uploadPendingAnnotations();
+    final remainingAnnotations = await _storageService
+        .readPendingAnnotationUploads();
+
+    // 4. Apply any remaining local changes (in case some failed to upload)
+    final changeQueue = await _storageService.readChangeQueue();
+    if (changeQueue.isNotEmpty) {
+      try {
+        changeQueue.applyToSheets(sheets);
+        // Update cache with applied changes
+        await _storageService.writeCachedSheets(sheets);
+      } catch (e) {
+        _log.warning('Failed to apply remaining changes: $e');
+      }
+    }
+
+    _log.info(
+      'Online sync complete: $changesSynced changes, $annotationsSynced annotations synced',
+    );
+
+    return SyncResult(
+      sheets: sheets,
+      isOnline: true,
+      changesSynced: changesSynced,
+      annotationsSynced: annotationsSynced,
+      changesUnsynced: changeQueue.length,
+      annotationsUnsynced: remainingAnnotations.length,
+    );
+  }
+
+  /// Offline sync: use cached data with local changes applied.
+  Future<SyncResult> _syncOffline() async {
+    _log.info('Offline mode: loading cached data...');
+
+    // 1. Load cached sheets
+    var sheets = await _storageService.readCachedSheets();
+
+    if (sheets.isEmpty) {
+      _log.warning('No cached sheets available in offline mode');
+    }
+
+    // 2. Apply pending changes locally
+    final changeQueue = await _storageService.readChangeQueue();
+    if (changeQueue.isNotEmpty) {
+      _log.info('Applying ${changeQueue.length} pending changes locally');
+      try {
+        changeQueue.applyToSheets(sheets);
+      } catch (e) {
+        _log.warning('Failed to apply some changes: $e');
+      }
+    }
+
+    final remainingAnnotations = await _storageService
+        .readPendingAnnotationUploads();
+
+    return SyncResult(
+      sheets: sheets,
+      isOnline: false,
+      changesSynced: 0,
+      annotationsSynced: 0,
+      changesUnsynced: changeQueue.length,
+      annotationsUnsynced: remainingAnnotations.length,
+    );
+  }
+
+  /// Uploads all pending changes to the server.
+  ///
+  /// Returns the number of successfully synced changes.
+  Future<int> _uploadPendingChanges() async {
+    final changes = await _storageService.readChangeList();
+    if (changes.isEmpty) return 0;
+
+    _log.info('Uploading ${changes.length} pending changes...');
+
+    try {
+      final appliedIndices = await _apiClient.uploadChanges(changes);
+
+      // Delete successfully synced changes (in reverse order to maintain indices)
+      for (int i = appliedIndices.length - 1; i >= 0; i--) {
+        await _storageService.deleteOldestChange();
+      }
+
+      _log.info('${appliedIndices.length} changes synced successfully');
+      return appliedIndices.length;
+    } catch (e) {
+      _log.warning('Failed to upload changes: $e');
+      return 0;
+    }
+  }
+
+  /// Uploads all pending annotation uploads to the server.
+  ///
+  /// Returns the number of successfully synced annotations.
+  Future<int> _uploadPendingAnnotations() async {
+    final pendingUploads = await _storageService.readPendingAnnotationUploads();
+    if (pendingUploads.isEmpty) return 0;
+
+    _log.info('Uploading ${pendingUploads.length} pending annotations...');
+
+    int syncedCount = 0;
+
+    for (final upload in pendingUploads) {
+      try {
+        await _apiClient.uploadAnnotation(
+          sheetUuid: upload.sheetUuid,
+          page: upload.page,
+          lastModified: upload.lastModified,
+          annotationsJson: upload.annotationsJson,
+        );
+
+        // Delete from pending queue after successful upload
+        await _storageService.deletePendingAnnotationUpload(upload.key);
+        syncedCount++;
+      } catch (e) {
+        _log.warning(
+          'Failed to upload annotation for ${upload.sheetUuid} page ${upload.page}: $e',
+        );
+        // Continue with other uploads
+      }
+    }
+
+    _log.info('$syncedCount annotations synced successfully');
+    return syncedCount;
+  }
+
+  /// Queues a change for sync.
+  ///
+  /// If online, attempts immediate upload. Otherwise, stores locally.
+  Future<void> queueChange(Change change) async {
+    // Always store locally first
+    await _storageService.writeChange(change);
+
+    // Try to upload immediately if online
+    try {
+      final isOnline = await _apiClient.checkConnection();
+      if (isOnline) {
+        final changes = await _storageService.readChangeList();
+        final appliedIndices = await _apiClient.uploadChanges(changes);
+
+        // Delete synced changes
+        for (int i = 0; i < appliedIndices.length; i++) {
+          await _storageService.deleteOldestChange();
+        }
+      }
+    } catch (e) {
+      _log.fine('Immediate upload failed, change queued for later: $e');
+    }
+  }
+
+  /// Queues an annotation upload.
+  ///
+  /// If the upload fails (e.g., offline), it will be stored for later sync.
+  Future<bool> uploadAnnotationWithFallback({
+    required String sheetUuid,
+    required int page,
+    required String annotationsJson,
+    required DateTime lastModified,
+  }) async {
+    try {
+      await _apiClient.uploadAnnotation(
+        sheetUuid: sheetUuid,
+        page: page,
+        lastModified: lastModified,
+        annotationsJson: annotationsJson,
+      );
+      return true;
+    } catch (e) {
+      _log.fine('Annotation upload failed, queuing for later: $e');
+
+      // Store for later upload
+      await _storageService.writePendingAnnotationUpload(
+        PendingAnnotationUpload(
+          sheetUuid: sheetUuid,
+          page: page,
+          annotationsJson: annotationsJson,
+          lastModified: lastModified,
+        ),
+      );
+      return false;
+    }
+  }
+
+  /// Updates the local cache after a sheet edit.
+  ///
+  /// Call this after applying changes to the sheets list locally.
+  Future<void> updateCachedSheets(List<Sheet> sheets) async {
+    await _storageService.writeCachedSheets(sheets);
+  }
+
+  /// Gets the number of pending changes.
+  Future<int> getPendingChangesCount() async {
+    return _storageService.getChangeQueueLength();
+  }
+
+  /// Gets the number of pending annotation uploads.
+  Future<int> getPendingAnnotationsCount() async {
+    final uploads = await _storageService.readPendingAnnotationUploads();
+    return uploads.length;
+  }
+
+  /// Checks if there is any pending data to sync.
+  Future<bool> hasPendingData() async {
+    final changesCount = await getPendingChangesCount();
+    final annotationsCount = await getPendingAnnotationsCount();
+    return changesCount > 0 || annotationsCount > 0;
+  }
+}

lib/edit_bottom_sheet.dart

@@ -1,70 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:sheetless/sheet.dart';
-
-typedef SheetEditedCallback = void Function(String newName, String newComposer);
-
-class EditItemBottomSheet extends StatefulWidget {
-  final Sheet sheet;
-  final SheetEditedCallback onSheetEdited;
-
-  const EditItemBottomSheet({
-    super.key,
-    required this.sheet,
-    required this.onSheetEdited,
-  });
-
-  @override
-  State<EditItemBottomSheet> createState() => _EditItemBottomSheetState();
-}
-
-class _EditItemBottomSheetState extends State<EditItemBottomSheet> {
-  late TextEditingController sheetNameController;
-  late TextEditingController composerNameController;
-
-  @override
-  void initState() {
-    sheetNameController = TextEditingController(text: widget.sheet.name);
-    composerNameController = TextEditingController(
-      text: widget.sheet.composerName,
-    );
-    super.initState();
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Padding(
-      padding: EdgeInsets.fromLTRB(
-        16,
-        16,
-        16,
-        MediaQuery.of(context).viewInsets.bottom + 16,
-      ),
-      child: Column(
-        mainAxisSize: MainAxisSize.min,
-        children: [
-          TextField(
-            controller: sheetNameController,
-            decoration: InputDecoration(labelText: "Sheet"),
-          ),
-          TextField(
-            controller: composerNameController,
-            decoration: InputDecoration(labelText: "Composer"),
-          ),
-          const SizedBox(height: 16),
-          ElevatedButton(
-            onPressed: () {
-              // TODO: check text fields are not empty
-              // TODO: save on pressing enter
-              widget.onSheetEdited(
-                sheetNameController.text,
-                composerNameController.text,
-              );
-              Navigator.pop(context);
-            },
-            child: Text("Save"),
-          ),
-        ],
-      ),
-    );
-  }
-}

lib/features/auth/login_page.dart

@@ -0,0 +1,242 @@
+import 'package:flutter/material.dart';
+import 'package:jwt_decoder/jwt_decoder.dart';
+import 'package:logging/logging.dart';
+import 'package:sheetless/core/services/api_client.dart';
+import 'package:sheetless/core/services/storage_service.dart';
+
+import '../home/home_page.dart';
+
+/// Login page for authenticating with the Sheetless server.
+class LoginPage extends StatefulWidget {
+  const LoginPage({super.key});
+
+  @override
+  State<LoginPage> createState() => _LoginPageState();
+}
+
+class _LoginPageState extends State<LoginPage> {
+  final _log = Logger('LoginPage');
+  final _formKey = GlobalKey<FormState>();
+  final _storageService = StorageService();
+
+  final _urlController = TextEditingController(
+    text: 'https://sheetless.julian-mutter.de',
+  );
+  final _usernameController = TextEditingController();
+  final _passwordController = TextEditingController();
+
+  String? _errorMessage;
+  bool _isLoggingIn = false;
+
+  @override
+  void initState() {
+    super.initState();
+    _tryAutoLogin();
+  }
+
+  @override
+  void dispose() {
+    _urlController.dispose();
+    _usernameController.dispose();
+    _passwordController.dispose();
+    super.dispose();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Auto-Login
+  // ---------------------------------------------------------------------------
+
+  /// Attempts to auto-login using a stored JWT token.
+  Future<void> _tryAutoLogin() async {
+    final jwt = await _storageService.readSecure(SecureStorageKey.jwt);
+
+    if (jwt != null && _isTokenValid(jwt)) {
+      await _navigateToHome();
+      return;
+    }
+
+    // Restore saved credentials for convenience
+    await _restoreCredentials();
+  }
+
+  /// Checks if a JWT token is still valid (not expired).
+  bool _isTokenValid(String jwt) {
+    try {
+      return !JwtDecoder.isExpired(jwt);
+    } on FormatException {
+      return false;
+    }
+  }
+
+  /// Restores previously saved URL and username for convenience.
+  Future<void> _restoreCredentials() async {
+    final url = await _storageService.readSecure(SecureStorageKey.url);
+    final username = await _storageService.readSecure(SecureStorageKey.email);
+
+    if (url != null) _urlController.text = url;
+    if (username != null) _usernameController.text = username;
+  }
+
+  // ---------------------------------------------------------------------------
+  // Login
+  // ---------------------------------------------------------------------------
+
+  /// Handles the login button press.
+  Future<void> _handleLogin() async {
+    if (_isLoggingIn) return;
+    if (!_formKey.currentState!.validate()) return;
+
+    setState(() {
+      _isLoggingIn = true;
+      _errorMessage = null;
+    });
+
+    try {
+      final apiClient = ApiClient(baseUrl: _urlController.text);
+      await apiClient.login(_usernameController.text, _passwordController.text);
+
+      // Save credentials for next time
+      await _saveCredentials(apiClient.token!);
+      await _navigateToHome();
+    } catch (e) {
+      _log.warning('Login failed', e);
+      setState(() {
+        _errorMessage = 'Login failed.\n$e';
+      });
+    } finally {
+      if (mounted) {
+        setState(() => _isLoggingIn = false);
+      }
+    }
+  }
+
+  /// Saves credentials after successful login.
+  Future<void> _saveCredentials(String token) async {
+    await _storageService.writeSecure(
+      SecureStorageKey.url,
+      _urlController.text,
+    );
+    await _storageService.writeSecure(SecureStorageKey.jwt, token);
+    await _storageService.writeSecure(
+      SecureStorageKey.email,
+      _usernameController.text,
+    );
+  }
+
+  /// Navigates to the home page after successful authentication.
+  Future<void> _navigateToHome() async {
+    final config = await _storageService.readConfig();
+
+    if (!mounted) return;
+    Navigator.of(context).pushReplacement(
+      MaterialPageRoute(builder: (_) => HomePage(config: config)),
+    );
+  }
+
+  // ---------------------------------------------------------------------------
+  // Validation
+  // ---------------------------------------------------------------------------
+
+  String? _validateNotEmpty(String? value) {
+    if (value == null || value.isEmpty) {
+      return 'This field is required';
+    }
+    return null;
+  }
+
+  // ---------------------------------------------------------------------------
+  // UI
+  // ---------------------------------------------------------------------------
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: const Text('Login')),
+      body: SafeArea(
+        child: Padding(
+          padding: const EdgeInsets.all(16.0),
+          child: Form(
+            key: _formKey,
+            child: Column(
+              mainAxisAlignment: MainAxisAlignment.center,
+              crossAxisAlignment: CrossAxisAlignment.stretch,
+              children: [
+                _buildUrlField(),
+                const SizedBox(height: 16),
+                _buildUsernameField(),
+                const SizedBox(height: 16),
+                _buildPasswordField(),
+                const SizedBox(height: 24),
+                _buildLoginButton(),
+                if (_errorMessage != null) _buildErrorMessage(),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+
+  Widget _buildUrlField() {
+    return TextFormField(
+      controller: _urlController,
+      validator: _validateNotEmpty,
+      decoration: const InputDecoration(
+        labelText: 'Server URL',
+        prefixIcon: Icon(Icons.dns),
+      ),
+      keyboardType: TextInputType.url,
+      textInputAction: TextInputAction.next,
+    );
+  }
+
+  Widget _buildUsernameField() {
+    return TextFormField(
+      controller: _usernameController,
+      validator: _validateNotEmpty,
+      decoration: const InputDecoration(
+        labelText: 'Username',
+        prefixIcon: Icon(Icons.person),
+      ),
+      textInputAction: TextInputAction.next,
+    );
+  }
+
+  Widget _buildPasswordField() {
+    return TextFormField(
+      controller: _passwordController,
+      validator: _validateNotEmpty,
+      decoration: const InputDecoration(
+        labelText: 'Password',
+        prefixIcon: Icon(Icons.lock),
+      ),
+      obscureText: true,
+      textInputAction: TextInputAction.done,
+      onFieldSubmitted: (_) => _handleLogin(),
+    );
+  }
+
+  Widget _buildLoginButton() {
+    return ElevatedButton(
+      onPressed: _isLoggingIn ? null : _handleLogin,
+      child: _isLoggingIn
+          ? const SizedBox(
+              height: 20,
+              width: 20,
+              child: CircularProgressIndicator(strokeWidth: 2),
+            )
+          : const Text('Login'),
+    );
+  }
+
+  Widget _buildErrorMessage() {
+    return Padding(
+      padding: const EdgeInsets.only(top: 16.0),
+      child: Text(
+        _errorMessage!,
+        style: const TextStyle(color: Colors.red),
+        textAlign: TextAlign.center,
+      ),
+    );
+  }
+}

lib/features/home/home_page.dart

@@ -0,0 +1,268 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_fullscreen/flutter_fullscreen.dart';
+import 'package:logging/logging.dart';
+import 'package:package_info_plus/package_info_plus.dart';
+import 'package:sheetless/core/models/config.dart';
+import 'package:sheetless/core/models/sheet.dart';
+import 'package:sheetless/core/services/api_client.dart';
+import 'package:sheetless/core/services/storage_service.dart';
+import 'package:sheetless/core/services/sync_service.dart';
+
+import '../../app.dart';
+import '../auth/login_page.dart';
+import '../sheet_viewer/sheet_viewer_page.dart';
+import 'widgets/app_drawer.dart';
+import 'widgets/sheets_list.dart';
+
+/// Main home page displaying the list of sheet music.
+///
+/// Features:
+/// - Pull-to-refresh sheet list
+/// - Shuffle mode for random practice
+/// - Navigation to sheet viewer
+/// - Logout functionality
+class HomePage extends StatefulWidget {
+  final Config config;
+
+  const HomePage({super.key, required this.config});
+
+  @override
+  State<HomePage> createState() => _HomePageState();
+}
+
+class _HomePageState extends State<HomePage> with RouteAware {
+  final _log = Logger('HomePage');
+  final _storageService = StorageService();
+
+  ApiClient? _apiClient;
+  SyncService? _syncService;
+  late Future<SyncResult> _syncFuture;
+  List<Sheet> _sheets = [];
+  bool _isShuffling = false;
+  bool _isOnline = true;
+  String? _appName;
+  String? _appVersion;
+
+  @override
+  void initState() {
+    super.initState();
+
+    // Exit fullscreen when entering home page
+    if (FullScreen.isFullScreen) {
+      FullScreen.setFullScreen(false);
+    }
+
+    // Subscribe to route changes
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      routeObserver.subscribe(this, ModalRoute.of(context)!);
+    });
+
+    _loadAppInfo();
+    _syncFuture = _loadSheets();
+  }
+
+  @override
+  void dispose() {
+    routeObserver.unsubscribe(this);
+    super.dispose();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Route Aware (Fullscreen Management)
+  // ---------------------------------------------------------------------------
+
+  @override
+  void didPush() {
+    // Exit fullscreen when entering home page
+    if (FullScreen.isFullScreen) {
+      FullScreen.setFullScreen(false);
+    }
+    super.didPush();
+  }
+
+  @override
+  void didPopNext() {
+    // Exit fullscreen when returning to home page
+    if (FullScreen.isFullScreen) {
+      FullScreen.setFullScreen(false);
+    }
+    super.didPopNext();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Data Loading
+  // ---------------------------------------------------------------------------
+
+  Future<void> _loadAppInfo() async {
+    final info = await PackageInfo.fromPlatform();
+    setState(() {
+      _appName = info.appName;
+      _appVersion = info.version;
+    });
+  }
+
+  Future<SyncResult> _loadSheets() async {
+    final url = await _storageService.readSecure(SecureStorageKey.url);
+    final jwt = await _storageService.readSecure(SecureStorageKey.jwt);
+
+    _apiClient = ApiClient(baseUrl: url!, token: jwt);
+    _syncService = SyncService(
+      apiClient: _apiClient!,
+      storageService: _storageService,
+    );
+
+    // Perform sync (fetches sheets, uploads pending changes/annotations)
+    final result = await _syncService!.sync();
+    _log.info(
+      '${result.sheets.length} sheets loaded (online: ${result.isOnline}, '
+      'changes synced: ${result.changesSynced}, '
+      'annotations synced: ${result.annotationsSynced})',
+    );
+
+    // Sort and store sheets
+    _sheets = await _sortSheetsByRecency(result.sheets);
+    _isOnline = result.isOnline;
+
+    return result;
+  }
+
+  Future<List<Sheet>> _sortSheetsByRecency(List<Sheet> sheets) async {
+    final accessTimes = await _storageService.readSheetAccessTimes();
+
+    sheets.sort((a, b) {
+      // Use local access time if available and more recent than server update
+      var dateA = accessTimes[a.uuid];
+      var dateB = accessTimes[b.uuid];
+
+      if (dateA == null || a.updatedAt.isAfter(dateA)) {
+        dateA = a.updatedAt;
+      }
+      if (dateB == null || b.updatedAt.isAfter(dateB)) {
+        dateB = b.updatedAt;
+      }
+
+      return dateB.compareTo(dateA); // Most recent first
+    });
+
+    return sheets;
+  }
+
+  Future<void> _refreshSheets() async {
+    setState(() {
+      _syncFuture = _loadSheets();
+    });
+  }
+
+  // ---------------------------------------------------------------------------
+  // Actions
+  // ---------------------------------------------------------------------------
+
+  void _handleShuffleChanged(bool enabled) async {
+    if (enabled) {
+      _sheets.shuffle();
+    } else {
+      await _sortSheetsByRecency(_sheets);
+    }
+
+    setState(() => _isShuffling = enabled);
+  }
+
+  Future<void> _handleLogout() async {
+    await _storageService.clearAllUserData();
+
+    if (!mounted) return;
+
+    Navigator.of(
+      context,
+    ).pushReplacement(MaterialPageRoute(builder: (_) => const LoginPage()));
+  }
+
+  void _openSheet(Sheet sheet) {
+    // Record access time for recency sorting
+    _storageService.writeSheetAccessTime(sheet.uuid, DateTime.now());
+
+    Navigator.push(
+      context,
+      MaterialPageRoute(
+        builder: (_) => SheetViewerPage(
+          sheet: sheet,
+          apiClient: _apiClient!,
+          config: widget.config,
+        ),
+      ),
+    );
+  }
+
+  // ---------------------------------------------------------------------------
+  // UI
+  // ---------------------------------------------------------------------------
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Row(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            const Text('Sheetless'),
+            if (!_isOnline)
+              const Padding(
+                padding: EdgeInsets.only(left: 8),
+                child: Icon(Icons.cloud_off, color: Colors.orange, size: 20),
+              ),
+          ],
+        ),
+      ),
+      endDrawer: AppDrawer(
+        isShuffling: _isShuffling,
+        onShuffleChanged: _handleShuffleChanged,
+        onLogout: _handleLogout,
+        appName: _appName,
+        appVersion: _appVersion,
+        syncFuture: _syncFuture,
+      ),
+      body: RefreshIndicator(onRefresh: _refreshSheets, child: _buildBody()),
+    );
+  }
+
+  Widget _buildBody() {
+    return FutureBuilder<SyncResult>(
+      future: _syncFuture,
+      builder: (context, snapshot) {
+        if (snapshot.connectionState != ConnectionState.done) {
+          return const Center(child: CircularProgressIndicator());
+        }
+
+        if (snapshot.hasError) {
+          _log.warning('Error loading sheets', snapshot.error);
+          return _buildError(snapshot.error.toString());
+        }
+
+        if (snapshot.hasData) {
+          return SheetsList(
+            sheets: _sheets,
+            onSheetSelected: _openSheet,
+            syncService: _syncService!,
+          );
+        }
+
+        return const Center(child: CircularProgressIndicator());
+      },
+    );
+  }
+
+  Widget _buildError(String message) {
+    return Center(
+      child: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Text(
+          message,
+          style: Theme.of(
+            context,
+          ).textTheme.titleMedium?.copyWith(color: Colors.red),
+          textAlign: TextAlign.center,
+        ),
+      ),
+    );
+  }
+}

lib/features/home/widgets/app_drawer.dart

@@ -0,0 +1,114 @@
+import 'package:flutter/material.dart';
+import 'package:sheetless/core/services/sync_service.dart';
+
+/// Callback for shuffle state changes.
+typedef ShuffleCallback = void Function(bool enabled);
+
+/// Navigation drawer for the home page.
+///
+/// Provides access to app-level actions like shuffle mode and logout.
+class AppDrawer extends StatelessWidget {
+  final bool isShuffling;
+  final ShuffleCallback onShuffleChanged;
+  final VoidCallback onLogout;
+  final String? appName;
+  final String? appVersion;
+  final Future<SyncResult> syncFuture;
+
+  const AppDrawer({
+    super.key,
+    required this.isShuffling,
+    required this.onShuffleChanged,
+    required this.onLogout,
+    required this.syncFuture,
+    this.appName,
+    this.appVersion,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Drawer(
+      child: SafeArea(
+        child: Padding(
+          padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 30),
+          child: Column(
+            mainAxisAlignment: MainAxisAlignment.spaceBetween,
+            children: [
+              _buildActions(),
+              Column(children: [_buildSyncStatus(), _buildAppInfo()]),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+
+  Widget _buildActions() {
+    return Column(
+      children: [
+        ListTile(
+          leading: Icon(Icons.shuffle, color: isShuffling ? Colors.blue : null),
+          title: const Text('Shuffle'),
+          onTap: () => onShuffleChanged(!isShuffling),
+        ),
+        ListTile(
+          leading: const Icon(Icons.logout),
+          title: const Text('Logout'),
+          onTap: onLogout,
+        ),
+      ],
+    );
+  }
+
+  Widget _buildSyncStatus() {
+    return Center(
+      // padding: const EdgeInsets.all(5.0),
+      child: FutureBuilder<SyncResult>(
+        future: syncFuture,
+        builder: (context, snapshot) {
+          if (snapshot.connectionState != ConnectionState.done) {
+            return const Center(child: CircularProgressIndicator());
+          }
+
+          if (snapshot.hasError) {
+            return Text(
+              "Error: ${snapshot.error.toString()}",
+              style: const TextStyle(color: Colors.red),
+              textAlign: TextAlign.center,
+            );
+          }
+
+          if (snapshot.hasData) {
+            final changes = snapshot.data!.changesUnsynced;
+            final annotations = snapshot.data!.annotationsUnsynced;
+            if (changes == 0 && annotations == 0) {
+              return Text(
+                "All synced!",
+                style: const TextStyle(color: Colors.black),
+                textAlign: TextAlign.center,
+              );
+            }
+            return Text(
+              "$changes changes and $annotations annotations unsynchronized!",
+              style: const TextStyle(color: Colors.red),
+              textAlign: TextAlign.center,
+            );
+          }
+
+          return const Center(child: CircularProgressIndicator());
+        },
+      ),
+    );
+  }
+
+  Widget _buildAppInfo() {
+    final versionText = appName != null && appVersion != null
+        ? '$appName v$appVersion'
+        : 'Loading...';
+
+    return Padding(
+      padding: const EdgeInsets.all(16.0),
+      child: Text(versionText, style: const TextStyle(color: Colors.grey)),
+    );
+  }
+}

lib/features/home/widgets/sheet_list_item.dart

@@ -0,0 +1,29 @@
+import 'package:flutter/material.dart';
+
+import '../../../core/models/sheet.dart';
+
+/// A list tile displaying a single sheet's information.
+///
+/// Shows the sheet name and composer, with tap and long-press handlers.
+class SheetListItem extends StatelessWidget {
+  final Sheet sheet;
+  final VoidCallback onTap;
+  final VoidCallback onLongPress;
+
+  const SheetListItem({
+    super.key,
+    required this.sheet,
+    required this.onTap,
+    required this.onLongPress,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return ListTile(
+      title: Text(sheet.name),
+      subtitle: Text(sheet.composer),
+      onTap: onTap,
+      onLongPress: onLongPress,
+    );
+  }
+}

lib/features/home/widgets/sheet_search_bar.dart

@@ -0,0 +1,38 @@
+import 'package:flutter/material.dart';
+
+/// Search bar for filtering sheets.
+///
+/// Provides a text input with search icon and clear button.
+class SheetSearchBar extends StatelessWidget {
+  final TextEditingController controller;
+  final VoidCallback onClear;
+
+  const SheetSearchBar({
+    super.key,
+    required this.controller,
+    required this.onClear,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.all(8.0),
+      child: TextField(
+        controller: controller,
+        decoration: InputDecoration(
+          hintText: 'Search sheets...',
+          prefixIcon: const Icon(Icons.search),
+          suffixIcon: controller.text.isNotEmpty
+              ? IconButton(
+                  icon: const Icon(Icons.clear),
+                  onPressed: onClear,
+                )
+              : null,
+          border: OutlineInputBorder(
+            borderRadius: BorderRadius.circular(8.0),
+          ),
+        ),
+      ),
+    );
+  }
+}

lib/features/home/widgets/sheets_list.dart

@@ -0,0 +1,191 @@
+import 'dart:async';
+import 'dart:ui';
+
+import 'package:flutter/material.dart';
+import 'package:sheetless/core/models/change.dart';
+import 'package:sheetless/core/models/sheet.dart';
+import 'package:sheetless/core/services/sync_service.dart';
+
+import '../../../shared/widgets/edit_sheet_bottom_sheet.dart';
+import 'sheet_list_item.dart';
+import 'sheet_search_bar.dart';
+
+/// Widget displaying a searchable list of sheets.
+///
+/// Features:
+/// - Debounced search filtering by name and composer
+/// - Long-press to edit sheet metadata
+/// - Cross-platform scroll support (mouse and touch)
+class SheetsList extends StatefulWidget {
+  final List<Sheet> sheets;
+  final ValueSetter<Sheet> onSheetSelected;
+  final SyncService syncService;
+
+  const SheetsList({
+    super.key,
+    required this.sheets,
+    required this.onSheetSelected,
+    required this.syncService,
+  });
+
+  @override
+  State<SheetsList> createState() => _SheetsListState();
+}
+
+class _SheetsListState extends State<SheetsList> {
+  static const _searchDebounceMs = 500;
+
+  final _searchController = TextEditingController();
+  Timer? _debounceTimer;
+  late List<Sheet> _filteredSheets;
+
+  @override
+  void initState() {
+    super.initState();
+    _filteredSheets = widget.sheets;
+    _searchController.addListener(_onSearchChanged);
+  }
+
+  @override
+  void dispose() {
+    _searchController.removeListener(_onSearchChanged);
+    _searchController.dispose();
+    _debounceTimer?.cancel();
+    super.dispose();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Search
+  // ---------------------------------------------------------------------------
+
+  void _onSearchChanged() {
+    _debounceTimer?.cancel();
+    _debounceTimer = Timer(
+      const Duration(milliseconds: _searchDebounceMs),
+      _filterSheets,
+    );
+  }
+
+  void _filterSheets() {
+    final query = _searchController.text.toLowerCase().trim();
+
+    if (query.isEmpty) {
+      setState(() => _filteredSheets = widget.sheets);
+      return;
+    }
+
+    // Split query into terms for multi-word search
+    final terms = query.split(RegExp(r'\s+'));
+
+    setState(() {
+      _filteredSheets = widget.sheets.where((sheet) {
+        final name = sheet.name.toLowerCase();
+        final composer = sheet.composer.toLowerCase();
+
+        // Each term must appear in either name or composer
+        return terms.every(
+          (term) => name.contains(term) || composer.contains(term),
+        );
+      }).toList();
+    });
+  }
+
+  void _clearSearch() {
+    _searchController.clear();
+    setState(() => _filteredSheets = widget.sheets);
+  }
+
+  // ---------------------------------------------------------------------------
+  // Edit Sheet
+  // ---------------------------------------------------------------------------
+
+  void _openEditSheet(BuildContext context, Sheet sheet) {
+    showModalBottomSheet(
+      context: context,
+      isScrollControlled: true,
+      builder: (_) => EditSheetBottomSheet(
+        sheet: sheet,
+        onSave: (newName, newComposer) =>
+            _handleSheetEdit(sheet, newName, newComposer),
+      ),
+    );
+  }
+
+  void _handleSheetEdit(Sheet sheet, String newName, String newComposer) {
+    // Queue changes for server sync (with timestamp for conflict resolution)
+    if (newName != sheet.name) {
+      widget.syncService.queueChange(
+        Change(
+          type: ChangeType.sheetNameChange,
+          sheetUuid: sheet.uuid,
+          value: newName,
+        ),
+      );
+    }
+    if (newComposer != sheet.composer) {
+      widget.syncService.queueChange(
+        Change(
+          type: ChangeType.composerNameChange,
+          sheetUuid: sheet.uuid,
+          value: newComposer,
+        ),
+      );
+    }
+
+    // Update local state
+    setState(() {
+      sheet.name = newName;
+      sheet.composer = newComposer;
+    });
+
+    // Update cached sheets
+    widget.syncService.updateCachedSheets(widget.sheets);
+  }
+
+  // ---------------------------------------------------------------------------
+  // Sheet Selection
+  // ---------------------------------------------------------------------------
+
+  void _handleSheetTap(Sheet sheet) {
+    // Move selected sheet to top of list (most recently accessed)
+    widget.sheets.remove(sheet);
+    widget.sheets.insert(0, sheet);
+
+    widget.onSheetSelected(sheet);
+  }
+
+  // ---------------------------------------------------------------------------
+  // UI
+  // ---------------------------------------------------------------------------
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        SheetSearchBar(controller: _searchController, onClear: _clearSearch),
+        Expanded(child: _buildList()),
+      ],
+    );
+  }
+
+  Widget _buildList() {
+    // Enable both mouse and touch scrolling for web compatibility
+    return ScrollConfiguration(
+      behavior: ScrollConfiguration.of(context).copyWith(
+        dragDevices: {PointerDeviceKind.touch, PointerDeviceKind.mouse},
+      ),
+      child: ListView.builder(
+        physics: const AlwaysScrollableScrollPhysics(),
+        itemCount: _filteredSheets.length,
+        itemBuilder: (context, index) {
+          final sheet = _filteredSheets[index];
+          return SheetListItem(
+            sheet: sheet,
+            onTap: () => _handleSheetTap(sheet),
+            onLongPress: () => _openEditSheet(context, sheet),
+          );
+        },
+      ),
+    );
+  }
+}

lib/features/sheet_viewer/drawing/drawing.dart

@@ -0,0 +1,12 @@
+/// Custom drawing library for PDF annotations.
+///
+/// Provides scalable drawing with normalized coordinates (0-1 range)
+/// that work correctly when the canvas size changes.
+library;
+
+export 'drawing_board.dart';
+export 'drawing_canvas.dart';
+export 'drawing_controller.dart';
+export 'drawing_line.dart';
+export 'drawing_toolbar.dart';
+export 'paint_preset.dart';

lib/features/sheet_viewer/drawing/drawing_board.dart

@@ -0,0 +1,200 @@
+import 'package:flutter/material.dart';
+
+import 'drawing_canvas.dart';
+import 'drawing_controller.dart';
+
+/// A drawing board that overlays a child widget with a drawing canvas.
+///
+/// Supports:
+/// - Drawing with normalized coordinates that scale correctly
+/// - Zooming and panning via InteractiveViewer
+/// - Toggle between view-only and drawing modes
+class DrawingBoard extends StatefulWidget {
+  /// The widget to display behind the drawing (e.g., PDF page)
+  final Widget child;
+
+  /// Size of the drawing area (should match child size)
+  final Size boardSize;
+
+  /// Controller for managing drawing state
+  final DrawingController controller;
+
+  /// Whether drawing is enabled (false = view only)
+  final bool drawingEnabled;
+
+  /// Minimum zoom scale
+  final double minScale;
+
+  /// Maximum zoom scale
+  final double maxScale;
+
+  /// Alignment of the board within available space
+  final Alignment alignment;
+
+  const DrawingBoard({
+    super.key,
+    required this.child,
+    required this.boardSize,
+    required this.controller,
+    this.drawingEnabled = true,
+    this.minScale = 1.0,
+    this.maxScale = 3.0,
+    this.alignment = Alignment.topCenter,
+  });
+
+  @override
+  State<DrawingBoard> createState() => _DrawingBoardState();
+}
+
+class _DrawingBoardState extends State<DrawingBoard> {
+  final TransformationController _transformationController =
+      TransformationController();
+
+  /// Tracks whether we're currently in a drawing gesture
+  bool _isDrawing = false;
+
+  /// Tracks the number of active pointers for gesture disambiguation
+  int _pointerCount = 0;
+
+  @override
+  void dispose() {
+    _transformationController.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    // The content that will be transformed (zoomed/panned)
+    final content = SizedBox(
+      width: widget.boardSize.width,
+      height: widget.boardSize.height,
+      child: Stack(
+        children: [
+          // Background child (e.g., PDF)
+          Positioned.fill(child: widget.child),
+
+          // Drawing overlay
+          Positioned.fill(
+            child: widget.drawingEnabled
+                ? _buildDrawingLayer()
+                : DrawingOverlay(
+                    controller: widget.controller,
+                    canvasSize: widget.boardSize,
+                  ),
+          ),
+        ],
+      ),
+    );
+
+    if (!widget.drawingEnabled) {
+      // View-only mode: just show the content (no zoom/pan here,
+      // let parent handle navigation)
+      return Align(
+        alignment: widget.alignment,
+        child: content,
+      );
+    }
+
+    // Drawing mode: wrap with InteractiveViewer for zoom/pan
+    // Use LayoutBuilder to get available size and center content manually
+    return LayoutBuilder(
+      builder: (context, constraints) {
+        // Calculate padding to center the content
+        final horizontalPadding =
+            (constraints.maxWidth - widget.boardSize.width) / 2;
+        final verticalPadding =
+            (constraints.maxHeight - widget.boardSize.height) / 2;
+
+        return InteractiveViewer(
+          transformationController: _transformationController,
+          minScale: widget.minScale,
+          maxScale: widget.maxScale,
+          boundaryMargin: const EdgeInsets.all(double.infinity),
+          constrained: false,
+          panEnabled: !_isDrawing,
+          scaleEnabled: !_isDrawing,
+          child: Padding(
+            padding: EdgeInsets.only(
+              left: horizontalPadding > 0 ? horizontalPadding : 0,
+              top: verticalPadding > 0 ? verticalPadding : 0,
+            ),
+            child: content,
+          ),
+        );
+      },
+    );
+  }
+
+  /// Builds the drawing layer with gesture handling.
+  ///
+  /// Uses Listener for drawing and distinguishes between:
+  /// - Single finger: Draw
+  /// - Two+ fingers: Pan/Zoom (handled by InteractiveViewer)
+  Widget _buildDrawingLayer() {
+    return Listener(
+      onPointerDown: _onPointerDown,
+      onPointerMove: _onPointerMove,
+      onPointerUp: _onPointerUp,
+      onPointerCancel: _onPointerCancel,
+      behavior: HitTestBehavior.translucent,
+      child: DrawingOverlay(
+        controller: widget.controller,
+        canvasSize: widget.boardSize,
+      ),
+    );
+  }
+
+  void _onPointerDown(PointerDownEvent event) {
+    _pointerCount++;
+
+    // Only start drawing with single finger touch
+    if (_pointerCount == 1) {
+      _isDrawing = true;
+      final normalized = _toNormalized(event.localPosition);
+      widget.controller.startLine(normalized);
+      setState(() {}); // Update to disable pan/scale
+    } else {
+      // Multiple fingers: cancel drawing, enable pan/zoom
+      if (_isDrawing) {
+        widget.controller.endLine();
+        _isDrawing = false;
+        setState(() {});
+      }
+    }
+  }
+
+  void _onPointerMove(PointerMoveEvent event) {
+    if (_isDrawing && _pointerCount == 1) {
+      final normalized = _toNormalized(event.localPosition);
+      widget.controller.addPoint(normalized);
+    }
+  }
+
+  void _onPointerUp(PointerUpEvent event) {
+    _pointerCount = (_pointerCount - 1).clamp(0, 10);
+
+    if (_isDrawing) {
+      widget.controller.endLine();
+      _isDrawing = false;
+      setState(() {}); // Re-enable pan/scale
+    }
+  }
+
+  void _onPointerCancel(PointerCancelEvent event) {
+    _pointerCount = (_pointerCount - 1).clamp(0, 10);
+
+    if (_isDrawing) {
+      widget.controller.endLine();
+      _isDrawing = false;
+      setState(() {});
+    }
+  }
+
+  /// Converts local position to normalized coordinates (0-1).
+  Offset _toNormalized(Offset localPosition) {
+    return Offset(
+      (localPosition.dx / widget.boardSize.width).clamp(0.0, 1.0),
+      (localPosition.dy / widget.boardSize.height).clamp(0.0, 1.0),
+    );
+  }
+}

lib/features/sheet_viewer/drawing/drawing_canvas.dart

@@ -0,0 +1,115 @@
+import 'package:flutter/material.dart';
+
+import 'drawing_controller.dart';
+import 'drawing_line.dart';
+
+/// Custom painter that renders drawing lines on a canvas.
+///
+/// Converts normalized coordinates (0-1) to actual canvas coordinates
+/// based on the provided canvas size.
+class DrawingPainter extends CustomPainter {
+  final List<DrawingLine> lines;
+  final DrawingLine? currentLine;
+  final Size canvasSize;
+
+  DrawingPainter({
+    required this.lines,
+    required this.currentLine,
+    required this.canvasSize,
+  });
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    // Draw all completed lines
+    for (final line in lines) {
+      _drawLine(canvas, line);
+    }
+
+    // Draw the current line being drawn
+    if (currentLine != null) {
+      _drawLine(canvas, currentLine!);
+    }
+  }
+
+  void _drawLine(Canvas canvas, DrawingLine line) {
+    if (line.points.length < 2) return;
+
+    final paint = Paint()
+      ..color = line.color
+      ..strokeWidth = line.strokeWidth * canvasSize.width
+      ..strokeCap = StrokeCap.round
+      ..strokeJoin = StrokeJoin.round
+      ..style = PaintingStyle.stroke
+      ..isAntiAlias = true;
+
+    // Create path from normalized points
+    final path = Path();
+    final firstPoint = _toCanvasPoint(line.points.first);
+    path.moveTo(firstPoint.dx, firstPoint.dy);
+
+    // Use quadratic bezier curves for smooth lines
+    if (line.points.length == 2) {
+      final endPoint = _toCanvasPoint(line.points.last);
+      path.lineTo(endPoint.dx, endPoint.dy);
+    } else {
+      for (int i = 1; i < line.points.length - 1; i++) {
+        final p0 = _toCanvasPoint(line.points[i]);
+        final p1 = _toCanvasPoint(line.points[i + 1]);
+        final midPoint = Offset((p0.dx + p1.dx) / 2, (p0.dy + p1.dy) / 2);
+        path.quadraticBezierTo(p0.dx, p0.dy, midPoint.dx, midPoint.dy);
+      }
+      // Draw to the last point
+      final lastPoint = _toCanvasPoint(line.points.last);
+      path.lineTo(lastPoint.dx, lastPoint.dy);
+    }
+
+    canvas.drawPath(path, paint);
+  }
+
+  /// Converts a normalized point (0-1) to canvas coordinates.
+  Offset _toCanvasPoint(Offset normalizedPoint) {
+    return Offset(
+      normalizedPoint.dx * canvasSize.width,
+      normalizedPoint.dy * canvasSize.height,
+    );
+  }
+
+  @override
+  bool shouldRepaint(covariant DrawingPainter oldDelegate) {
+    return lines != oldDelegate.lines ||
+        currentLine != oldDelegate.currentLine ||
+        canvasSize != oldDelegate.canvasSize;
+  }
+}
+
+/// A widget that displays drawing lines on a transparent canvas.
+///
+/// This widget only shows the drawings, it doesn't handle input.
+/// Use [DrawingCanvas] or [DrawingBoard] for input handling.
+class DrawingOverlay extends StatelessWidget {
+  final DrawingController controller;
+  final Size canvasSize;
+
+  const DrawingOverlay({
+    super.key,
+    required this.controller,
+    required this.canvasSize,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return ListenableBuilder(
+      listenable: controller,
+      builder: (context, _) {
+        return CustomPaint(
+          size: canvasSize,
+          painter: DrawingPainter(
+            lines: controller.lines,
+            currentLine: controller.currentLine,
+            canvasSize: canvasSize,
+          ),
+        );
+      },
+    );
+  }
+}

lib/features/sheet_viewer/drawing/drawing_controller.dart

@@ -0,0 +1,381 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+
+import 'drawing_line.dart';
+import 'paint_preset.dart';
+
+/// Represents an undoable action.
+sealed class DrawingAction {
+  const DrawingAction();
+}
+
+/// Action for adding a line.
+class AddLineAction extends DrawingAction {
+  final DrawingLine line;
+  const AddLineAction(this.line);
+}
+
+/// Action for erasing lines.
+class EraseAction extends DrawingAction {
+  final List<DrawingLine> erasedLines;
+  const EraseAction(this.erasedLines);
+}
+
+/// Controller for managing drawing state with undo/redo support.
+///
+/// Manages a stack of [DrawingLine] objects and provides methods for
+/// drawing, undoing, redoing, and serializing the drawing state.
+class DrawingController extends ChangeNotifier {
+  /// All completed lines in the drawing
+  final List<DrawingLine> _lines = [];
+
+  /// Stack of actions for undo functionality
+  final List<DrawingAction> _undoStack = [];
+
+  /// Stack of actions for redo functionality
+  final List<DrawingAction> _redoStack = [];
+
+  /// The line currently being drawn (null when not drawing)
+  DrawingLine? _currentLine;
+
+  /// Current paint preset being used
+  PaintPreset _currentPreset = PaintPreset.blackPen;
+
+  /// Whether eraser mode is active
+  bool _isEraserMode = false;
+
+  /// Lines erased in the current eraser stroke (for undo as single action)
+  final List<DrawingLine> _currentErasedLines = [];
+
+  /// Maximum number of history steps to keep
+  final int maxHistorySteps;
+
+  /// Whether there are unsaved changes since last load/clear
+  bool _hasUnsavedChanges = false;
+
+  DrawingController({this.maxHistorySteps = 50});
+
+  // ---------------------------------------------------------------------------
+  // Getters
+  // ---------------------------------------------------------------------------
+
+  /// All completed lines (read-only)
+  List<DrawingLine> get lines => List.unmodifiable(_lines);
+
+  /// The line currently being drawn
+  DrawingLine? get currentLine => _currentLine;
+
+  /// Current paint preset
+  PaintPreset get currentPreset => _currentPreset;
+
+  /// Whether eraser mode is active
+  bool get isEraserMode => _isEraserMode;
+
+  /// Whether undo is available
+  bool get canUndo => _undoStack.isNotEmpty;
+
+  /// Whether redo is available
+  bool get canRedo => _redoStack.isNotEmpty;
+
+  /// Whether there are unsaved changes since last load/clear/markSaved
+  bool get hasUnsavedChanges => _hasUnsavedChanges;
+
+  // ---------------------------------------------------------------------------
+  // Drawing Operations
+  // ---------------------------------------------------------------------------
+
+  /// Starts a new line at the given normalized position.
+  void startLine(Offset normalizedPoint) {
+    if (_isEraserMode) {
+      _currentErasedLines.clear();
+      _eraseAtPoint(normalizedPoint);
+      return;
+    }
+
+    _currentLine = DrawingLine(
+      points: [normalizedPoint],
+      color: _currentPreset.color,
+      strokeWidth: _currentPreset.strokeWidth,
+    );
+    notifyListeners();
+  }
+
+  /// Adds a point to the current line.
+  void addPoint(Offset normalizedPoint) {
+    if (_isEraserMode) {
+      _eraseAtPoint(normalizedPoint);
+      return;
+    }
+
+    if (_currentLine == null) return;
+
+    // Filter points that are too close to reduce memory usage
+    if (_currentLine!.isPointTooClose(normalizedPoint)) return;
+
+    _currentLine = _currentLine!.addPoint(normalizedPoint);
+    notifyListeners();
+  }
+
+  /// Completes the current line and adds it to the history.
+  void endLine() {
+    if (_isEraserMode) {
+      // If we erased lines in this stroke, record as single action
+      if (_currentErasedLines.isNotEmpty) {
+        _undoStack.add(EraseAction(List.from(_currentErasedLines)));
+        _redoStack.clear();
+        _trimHistory();
+        _currentErasedLines.clear();
+        _hasUnsavedChanges = true;
+        notifyListeners(); // Update UI to enable undo button
+      }
+      return;
+    }
+
+    if (_currentLine == null) return;
+
+    // Only add lines with at least 2 points
+    if (_currentLine!.points.length >= 2) {
+      _lines.add(_currentLine!);
+      _undoStack.add(AddLineAction(_currentLine!));
+      _redoStack.clear();
+      _trimHistory();
+      _hasUnsavedChanges = true;
+    }
+
+    _currentLine = null;
+    notifyListeners();
+  }
+
+  /// Trims history to maxHistorySteps to prevent memory growth.
+  void _trimHistory() {
+    while (_undoStack.length > maxHistorySteps) {
+      _undoStack.removeAt(0);
+    }
+  }
+
+  // ---------------------------------------------------------------------------
+  // Eraser Operations
+  // ---------------------------------------------------------------------------
+
+  /// Eraser hit radius in normalized coordinates
+  static const double _eraserRadius = 0.015;
+
+  /// Checks if a point is near a line and erases it if so.
+  void _eraseAtPoint(Offset point) {
+    // Find all lines that intersect with the eraser point
+    final linesToRemove = <DrawingLine>[];
+
+    for (final line in _lines) {
+      if (_lineIntersectsPoint(
+          line, point, _eraserRadius + line.strokeWidth / 2)) {
+        linesToRemove.add(line);
+      }
+    }
+
+    // Remove intersecting lines and track them for undo
+    for (final line in linesToRemove) {
+      _lines.remove(line);
+      _currentErasedLines.add(line);
+    }
+
+    if (linesToRemove.isNotEmpty) {
+      notifyListeners();
+    }
+  }
+
+  /// Checks if a line intersects with a circular point.
+  bool _lineIntersectsPoint(DrawingLine line, Offset point, double radius) {
+    // Check if any point is within radius
+    for (final linePoint in line.points) {
+      if ((linePoint - point).distance <= radius) {
+        return true;
+      }
+    }
+    // Check line segments
+    for (int i = 0; i < line.points.length - 1; i++) {
+      if (_pointToSegmentDistance(point, line.points[i], line.points[i + 1]) <=
+          radius) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /// Calculates the distance from a point to a line segment.
+  double _pointToSegmentDistance(Offset point, Offset segStart, Offset segEnd) {
+    final dx = segEnd.dx - segStart.dx;
+    final dy = segEnd.dy - segStart.dy;
+    final lengthSquared = dx * dx + dy * dy;
+
+    if (lengthSquared == 0) {
+      // Segment is a point
+      return (point - segStart).distance;
+    }
+
+    // Project point onto the line, clamping to segment
+    var t = ((point.dx - segStart.dx) * dx + (point.dy - segStart.dy) * dy) /
+        lengthSquared;
+    t = t.clamp(0.0, 1.0);
+
+    final projection = Offset(
+      segStart.dx + t * dx,
+      segStart.dy + t * dy,
+    );
+
+    return (point - projection).distance;
+  }
+
+  // ---------------------------------------------------------------------------
+  // Eraser Mode
+  // ---------------------------------------------------------------------------
+
+  /// Toggles eraser mode.
+  void toggleEraserMode() {
+    _isEraserMode = !_isEraserMode;
+    notifyListeners();
+  }
+
+  /// Sets eraser mode.
+  void setEraserMode(bool enabled) {
+    if (_isEraserMode != enabled) {
+      _isEraserMode = enabled;
+      notifyListeners();
+    }
+  }
+
+  // ---------------------------------------------------------------------------
+  // Undo/Redo
+  // ---------------------------------------------------------------------------
+
+  /// Undoes the last action.
+  void undo() {
+    if (!canUndo) return;
+
+    final action = _undoStack.removeLast();
+
+    switch (action) {
+      case AddLineAction(:final line):
+        // Remove the line that was added
+        _lines.remove(line);
+        _redoStack.add(action);
+      case EraseAction(:final erasedLines):
+        // Restore the lines that were erased
+        _lines.addAll(erasedLines);
+        _redoStack.add(action);
+    }
+
+    _hasUnsavedChanges = true;
+    notifyListeners();
+  }
+
+  /// Redoes the last undone action.
+  void redo() {
+    if (!canRedo) return;
+
+    final action = _redoStack.removeLast();
+
+    switch (action) {
+      case AddLineAction(:final line):
+        // Re-add the line
+        _lines.add(line);
+        _undoStack.add(action);
+      case EraseAction(:final erasedLines):
+        // Re-erase the lines
+        for (final line in erasedLines) {
+          _lines.remove(line);
+        }
+        _undoStack.add(action);
+    }
+
+    _hasUnsavedChanges = true;
+    notifyListeners();
+  }
+
+  /// Clears all lines from the canvas.
+  void clear() {
+    _lines.clear();
+    _undoStack.clear();
+    _redoStack.clear();
+    _currentLine = null;
+    _currentErasedLines.clear();
+    _hasUnsavedChanges = false;
+    notifyListeners();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Paint Preset
+  // ---------------------------------------------------------------------------
+
+  /// Sets the current paint preset and disables eraser mode.
+  void setPreset(PaintPreset preset) {
+    _currentPreset = preset;
+    _isEraserMode = false;
+    notifyListeners();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Serialization
+  // ---------------------------------------------------------------------------
+
+  /// Exports all lines to a JSON-serializable list.
+  List<Map<String, dynamic>> toJsonList() {
+    return _lines.map((line) => line.toJson()).toList();
+  }
+
+  /// Exports all lines to a JSON string.
+  String toJsonString() {
+    return jsonEncode(toJsonList());
+  }
+
+  /// Imports lines from a JSON-serializable list.
+  void fromJsonList(List<Map<String, dynamic>> jsonList) {
+    _lines.clear();
+    _undoStack.clear();
+    _redoStack.clear();
+    _currentLine = null;
+    _currentErasedLines.clear();
+    _hasUnsavedChanges = false;
+
+    for (final json in jsonList) {
+      _lines.add(DrawingLine.fromJson(json));
+    }
+
+    notifyListeners();
+  }
+
+  /// Imports lines from a JSON string.
+  void fromJsonString(String jsonString) {
+    if (jsonString.isEmpty || jsonString == '[]') {
+      clear();
+      return;
+    }
+
+    final decoded = jsonDecode(jsonString) as List;
+    if (decoded.isEmpty) {
+      clear();
+      return;
+    }
+    fromJsonList(decoded.cast<Map<String, dynamic>>());
+  }
+
+  /// Adds existing lines without clearing (for merging annotations).
+  void addLines(List<DrawingLine> newLines) {
+    _lines.addAll(newLines);
+    _trimHistory();
+    notifyListeners();
+  }
+
+  /// Marks the current state as saved (resets unsaved changes flag).
+  void markSaved() {
+    _hasUnsavedChanges = false;
+  }
+
+  @override
+  void dispose() {
+    _lines.clear();
+    _undoStack.clear();
+    _redoStack.clear();
+    super.dispose();
+  }
+}

lib/features/sheet_viewer/drawing/drawing_line.dart

@@ -0,0 +1,99 @@
+import 'dart:ui';
+
+/// Represents a single stroke/line drawn on the canvas.
+///
+/// Points are stored in normalized coordinates (0.0 to 1.0) where:
+/// - (0, 0) is the top-left corner of the drawing area
+/// - (1, 1) is the bottom-right corner of the drawing area
+///
+/// This allows drawings to scale correctly when the canvas size changes.
+class DrawingLine {
+  /// The minimal squared distance between to points which are normalized so that this point is allowed to be added to the line
+  static const minNormalizedPointDistanceSquared = 0.001 * 0.001;
+
+  /// Points in normalized coordinates (0.0 to 1.0)
+  final List<Offset> points;
+
+  /// Color of the line (stored as ARGB integer for JSON serialization)
+  final Color color;
+
+  /// Stroke width in normalized units (relative to canvas width)
+  /// A value of 0.01 means the stroke is 1% of the canvas width
+  final double strokeWidth;
+
+  const DrawingLine({
+    required this.points,
+    required this.color,
+    required this.strokeWidth,
+  });
+
+  /// Creates a DrawingLine from JSON data.
+  factory DrawingLine.fromJson(Map<String, dynamic> json) {
+    final pointsList = (json['points'] as List)
+        .map(
+          (p) => Offset((p['x'] as num).toDouble(), (p['y'] as num).toDouble()),
+        )
+        .toList();
+
+    return DrawingLine(
+      points: pointsList,
+      color: Color(json['color'] as int),
+      strokeWidth: (json['strokeWidth'] as num).toDouble(),
+    );
+  }
+
+  /// Converts this line to a JSON-serializable map.
+  Map<String, dynamic> toJson() {
+    return {
+      'points': points.map((p) => {'x': p.dx, 'y': p.dy}).toList(),
+      'color': color.toARGB32(),
+      'strokeWidth': strokeWidth,
+    };
+  }
+
+  /// Creates a copy of this line with an additional point.
+  DrawingLine addPoint(Offset normalizedPoint) {
+    return DrawingLine(
+      points: [...points, normalizedPoint],
+      color: color,
+      strokeWidth: strokeWidth,
+    );
+  }
+
+  bool isPointTooClose(Offset nextNormalizedPoint) {
+    if (points.isEmpty) {
+      return false;
+    }
+    return (points.last - nextNormalizedPoint).distanceSquared <
+        minNormalizedPointDistanceSquared;
+  }
+
+  /// Creates a copy with updated points.
+  DrawingLine copyWith({
+    List<Offset>? points,
+    Color? color,
+    double? strokeWidth,
+  }) {
+    return DrawingLine(
+      points: points ?? this.points,
+      color: color ?? this.color,
+      strokeWidth: strokeWidth ?? this.strokeWidth,
+    );
+  }
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+    if (other is! DrawingLine) return false;
+    if (points.length != other.points.length) return false;
+    if (color != other.color) return false;
+    if (strokeWidth != other.strokeWidth) return false;
+    for (int i = 0; i < points.length; i++) {
+      if (points[i] != other.points[i]) return false;
+    }
+    return true;
+  }
+
+  @override
+  int get hashCode => Object.hash(Object.hashAll(points), color, strokeWidth);
+}

lib/features/sheet_viewer/drawing/drawing_toolbar.dart

@@ -0,0 +1,236 @@
+import 'package:flutter/material.dart';
+
+import 'drawing_controller.dart';
+import 'paint_preset.dart';
+
+/// A floating toolbar for drawing controls.
+///
+/// Provides quick access to:
+/// - Paint presets (pens and markers)
+/// - Undo/Redo buttons
+class DrawingToolbar extends StatelessWidget {
+  final DrawingController controller;
+  final VoidCallback? onClose;
+
+  const DrawingToolbar({
+    super.key,
+    required this.controller,
+    this.onClose,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return ListenableBuilder(
+      listenable: controller,
+      builder: (context, _) {
+        return Container(
+          padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
+          decoration: BoxDecoration(
+            color: Theme.of(context).colorScheme.surface,
+            borderRadius: BorderRadius.circular(24),
+            boxShadow: [
+              BoxShadow(
+                color: Colors.black.withValues(alpha: 0.2),
+                blurRadius: 8,
+                offset: const Offset(0, 2),
+              ),
+            ],
+          ),
+          child: Row(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              // Paint presets
+              ...PaintPreset.quickAccess.map((preset) => _buildPresetButton(
+                    context,
+                    preset,
+                    isSelected: !controller.isEraserMode &&
+                        controller.currentPreset == preset,
+                  )),
+
+              const SizedBox(width: 8),
+              _buildDivider(context),
+              const SizedBox(width: 8),
+
+              // Eraser button
+              _buildEraserButton(
+                context,
+                isSelected: controller.isEraserMode,
+              ),
+
+              const SizedBox(width: 8),
+              _buildDivider(context),
+              const SizedBox(width: 8),
+
+              // Undo button
+              _buildActionButton(
+                context,
+                icon: Icons.undo,
+                onPressed: controller.canUndo ? controller.undo : null,
+                tooltip: 'Undo',
+              ),
+
+              // Redo button
+              _buildActionButton(
+                context,
+                icon: Icons.redo,
+                onPressed: controller.canRedo ? controller.redo : null,
+                tooltip: 'Redo',
+              ),
+
+              if (onClose != null) ...[
+                const SizedBox(width: 8),
+                _buildDivider(context),
+                const SizedBox(width: 8),
+                _buildActionButton(
+                  context,
+                  icon: Icons.close,
+                  onPressed: onClose,
+                  tooltip: 'Exit Drawing Mode',
+                ),
+              ],
+            ],
+          ),
+        );
+      },
+    );
+  }
+
+  Widget _buildPresetButton(
+    BuildContext context,
+    PaintPreset preset, {
+    required bool isSelected,
+  }) {
+    final isMarker = preset.strokeWidth > 0.01;
+    final colorScheme = Theme.of(context).colorScheme;
+
+    return Tooltip(
+      message: preset.name,
+      child: InkWell(
+        onTap: () => controller.setPreset(preset),
+        borderRadius: BorderRadius.circular(20),
+        child: Container(
+          width: 36,
+          height: 36,
+          margin: const EdgeInsets.symmetric(horizontal: 2),
+          decoration: BoxDecoration(
+            shape: BoxShape.circle,
+            border: isSelected
+                ? Border.all(color: colorScheme.primary, width: 2)
+                : null,
+          ),
+          child: Center(
+            child: Container(
+              width: isMarker ? 24 : 18,
+              height: isMarker ? 12 : 18,
+              decoration: BoxDecoration(
+                color: preset.color,
+                borderRadius: isMarker
+                    ? BorderRadius.circular(2)
+                    : BorderRadius.circular(9),
+                border: preset.color.a < 1
+                    ? Border.all(color: Colors.grey.shade400, width: 0.5)
+                    : null,
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+
+  Widget _buildEraserButton(
+    BuildContext context, {
+    required bool isSelected,
+  }) {
+    final colorScheme = Theme.of(context).colorScheme;
+
+    return Tooltip(
+      message: 'Eraser',
+      child: InkWell(
+        onTap: () => controller.setEraserMode(true),
+        borderRadius: BorderRadius.circular(20),
+        child: Container(
+          width: 36,
+          height: 36,
+          margin: const EdgeInsets.symmetric(horizontal: 2),
+          decoration: BoxDecoration(
+            shape: BoxShape.circle,
+            border: isSelected
+                ? Border.all(color: colorScheme.primary, width: 2)
+                : null,
+          ),
+          child: Icon(
+            Icons.auto_fix_high,
+            size: 20,
+            color: colorScheme.onSurface,
+          ),
+        ),
+      ),
+    );
+  }
+
+  Widget _buildActionButton(
+    BuildContext context, {
+    required IconData icon,
+    required VoidCallback? onPressed,
+    required String tooltip,
+  }) {
+    final colorScheme = Theme.of(context).colorScheme;
+
+    return Tooltip(
+      message: tooltip,
+      child: InkWell(
+        onTap: onPressed,
+        borderRadius: BorderRadius.circular(20),
+        child: Container(
+          width: 36,
+          height: 36,
+          margin: const EdgeInsets.symmetric(horizontal: 2),
+          child: Icon(
+            icon,
+            size: 20,
+            color: onPressed != null
+                ? colorScheme.onSurface
+                : colorScheme.onSurface.withValues(alpha: 0.3),
+          ),
+        ),
+      ),
+    );
+  }
+
+  Widget _buildDivider(BuildContext context) {
+    return Container(
+      width: 1,
+      height: 24,
+      color: Theme.of(context).dividerColor,
+    );
+  }
+}
+
+/// A compact floating action button to toggle paint mode.
+class DrawingModeButton extends StatelessWidget {
+  final bool isActive;
+  final VoidCallback onPressed;
+
+  const DrawingModeButton({
+    super.key,
+    required this.isActive,
+    required this.onPressed,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return FloatingActionButton.small(
+      onPressed: onPressed,
+      backgroundColor: isActive
+          ? Theme.of(context).colorScheme.primaryContainer
+          : Theme.of(context).colorScheme.surface,
+      child: Icon(
+        isActive ? Icons.brush : Icons.brush_outlined,
+        color: isActive
+            ? Theme.of(context).colorScheme.onPrimaryContainer
+            : Theme.of(context).colorScheme.onSurface,
+      ),
+    );
+  }
+}

lib/features/sheet_viewer/drawing/paint_preset.dart

@@ -0,0 +1,111 @@
+import 'package:flutter/material.dart';
+
+/// Predefined paint configurations for common annotation styles.
+///
+/// Each preset defines a color and stroke width for drawing.
+/// Stroke width is normalized (relative to canvas width).
+class PaintPreset {
+  /// Display name for the preset
+  final String name;
+
+  /// Color of the paint (including opacity)
+  final Color color;
+
+  /// Stroke width in normalized units (relative to canvas width)
+  /// A value of 0.005 means the stroke is 0.5% of the canvas width
+  final double strokeWidth;
+
+  /// Icon to display for this preset
+  final IconData icon;
+
+  const PaintPreset({
+    required this.name,
+    required this.color,
+    required this.strokeWidth,
+    required this.icon,
+  });
+
+  // ---------------------------------------------------------------------------
+  // Default Presets
+  // ---------------------------------------------------------------------------
+
+  /// Black pen for writing/notes
+  static const blackPen = PaintPreset(
+    name: 'Black Pen',
+    color: Colors.black,
+    strokeWidth: 0.003, // Thin line for writing
+    icon: Icons.edit,
+  );
+
+  /// Red pen for corrections/markings
+  static const redPen = PaintPreset(
+    name: 'Red Pen',
+    color: Colors.red,
+    strokeWidth: 0.003,
+    icon: Icons.edit,
+  );
+
+  /// Blue pen for annotations
+  static const bluePen = PaintPreset(
+    name: 'Blue Pen',
+    color: Colors.blue,
+    strokeWidth: 0.003,
+    icon: Icons.edit,
+  );
+
+  /// Yellow highlighter (semi-transparent, thicker)
+  static const yellowMarker = PaintPreset(
+    name: 'Yellow Marker',
+    color: Color(0x80FFEB3B), // Yellow with 50% opacity
+    strokeWidth: 0.02, // Thicker for highlighting
+    icon: Icons.highlight,
+  );
+
+  /// Green highlighter
+  static const greenMarker = PaintPreset(
+    name: 'Green Marker',
+    color: Color(0x804CAF50), // Green with 50% opacity
+    strokeWidth: 0.018,
+    icon: Icons.highlight,
+  );
+
+  /// Pink highlighter
+  static const pinkMarker = PaintPreset(
+    name: 'Pink Marker',
+    color: Color(0x80E91E63), // Pink with 50% opacity
+    strokeWidth: 0.015,
+    icon: Icons.highlight,
+  );
+
+  /// All available default presets
+  static const List<PaintPreset> defaults = [
+    blackPen,
+    redPen,
+    bluePen,
+    yellowMarker,
+    greenMarker,
+    pinkMarker,
+  ];
+
+  /// Quick access presets (shown in main toolbar)
+  static const List<PaintPreset> quickAccess = [
+    blackPen,
+    redPen,
+    bluePen,
+    yellowMarker,
+    greenMarker,
+    pinkMarker,
+  ];
+
+  @override
+  bool operator ==(Object other) {
+    if (identical(this, other)) return true;
+    return other is PaintPreset &&
+        other.name == name &&
+        other.color == color &&
+        other.strokeWidth == strokeWidth;
+  }
+
+  @override
+  int get hashCode => Object.hash(name, color, strokeWidth);
+}

lib/features/sheet_viewer/sheet_viewer_page.dart

@@ -0,0 +1,402 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:flutter_fullscreen/flutter_fullscreen.dart';
+import 'package:logging/logging.dart';
+import 'package:pdfrx/pdfrx.dart';
+import 'package:sheetless/core/models/config.dart';
+import 'package:sheetless/core/models/sheet.dart';
+import 'package:sheetless/core/services/annotation_sync_service.dart';
+import 'package:sheetless/core/services/api_client.dart';
+import 'package:sheetless/core/services/storage_service.dart';
+
+import '../../shared/input/pedal_shortcuts.dart';
+import 'drawing/drawing.dart';
+import 'widgets/pdf_page_display.dart';
+import 'widgets/touch_navigation_layer.dart';
+
+/// Page for viewing and annotating PDF sheet music.
+class SheetViewerPage extends StatefulWidget {
+  final Sheet sheet;
+  final ApiClient apiClient;
+  final Config config;
+
+  const SheetViewerPage({
+    super.key,
+    required this.sheet,
+    required this.apiClient,
+    required this.config,
+  });
+
+  @override
+  State<SheetViewerPage> createState() => _SheetViewerPageState();
+}
+
+class _SheetViewerPageState extends State<SheetViewerPage>
+    with FullScreenListener {
+  final _log = Logger('SheetViewerPage');
+  final _storageService = StorageService();
+  late final AnnotationSyncService _syncService;
+
+  PdfDocument? _document;
+  late Future<bool> _documentLoaded;
+  int _currentPage = 1;
+  int _totalPages = 1;
+  bool _isPaintMode = false;
+
+  /// Drawing controller for the current left page
+  late DrawingController _leftDrawingController;
+
+  /// Drawing controller for the right page (two-page mode)
+  late DrawingController _rightDrawingController;
+
+  @override
+  void initState() {
+    super.initState();
+
+    // Initialize sync service
+    _syncService = AnnotationSyncService(
+      apiClient: widget.apiClient,
+      storageService: _storageService,
+    );
+
+    // Initialize drawing controllers
+    _leftDrawingController = DrawingController(maxHistorySteps: 50);
+    _rightDrawingController = DrawingController(maxHistorySteps: 50);
+
+    FullScreen.addListener(this);
+    if (FullScreen.isFullScreen != widget.config.fullscreen) {
+      FullScreen.setFullScreen(widget.config.fullscreen);
+    }
+    _documentLoaded = _loadPdf();
+  }
+
+  @override
+  void dispose() {
+    // Make sure annotations are saved before exiting
+    if (_isPaintMode) {
+      _saveCurrentAnnotations();
+    }
+
+    _leftDrawingController.dispose();
+    _rightDrawingController.dispose();
+    FullScreen.removeListener(this);
+    _document?.dispose();
+    super.dispose();
+  }
+
+  // ---------------------------------------------------------------------------
+  // PDF Loading
+  // ---------------------------------------------------------------------------
+
+  Future<bool> _loadPdf() async {
+    if (kIsWeb) {
+      // Web: load directly into memory
+      final data = await widget.apiClient.fetchPdfData(widget.sheet.uuid);
+      _document = await PdfDocument.openData(data);
+    } else {
+      // Native: use file cache
+      final file = await widget.apiClient.getPdfFileCached(widget.sheet.uuid);
+      _document = await PdfDocument.openFile(file.path);
+    }
+
+    setState(() {
+      _totalPages = _document!.pages.length;
+    });
+
+    // Sync annotations from server (downloads newer versions)
+    await _syncService.syncFromServer(widget.sheet.uuid);
+
+    // Load annotations for current page(s)
+    await _loadAnnotationsForCurrentPages();
+
+    return true;
+  }
+
+  // ---------------------------------------------------------------------------
+  // Annotation Persistence
+  // ---------------------------------------------------------------------------
+
+  /// Loads annotations for the current page(s) from storage.
+  Future<void> _loadAnnotationsForCurrentPages() async {
+    // Load left page annotations
+    final leftJson = await _storageService.readAnnotations(
+      widget.sheet.uuid,
+      _currentPage,
+    );
+    if (leftJson != null && leftJson.isNotEmpty) {
+      _leftDrawingController.fromJsonString(leftJson);
+    } else {
+      _leftDrawingController.clear();
+    }
+
+    // Load right page annotations (two-page mode)
+    if (widget.config.twoPageMode && _currentPage < _totalPages) {
+      final rightJson = await _storageService.readAnnotations(
+        widget.sheet.uuid,
+        _currentPage + 1,
+      );
+      if (rightJson != null && rightJson.isNotEmpty) {
+        _rightDrawingController.fromJsonString(rightJson);
+      } else {
+        _rightDrawingController.clear();
+      }
+    }
+  }
+
+  /// Saves the current page(s) annotations to storage and uploads to server.
+  ///
+  /// Only saves if there are actual changes to avoid unnecessary writes/uploads.
+  Future<void> _saveCurrentAnnotations() async {
+    final now = DateTime.now();
+
+    // Save left page only if changed
+    if (_leftDrawingController.hasUnsavedChanges) {
+      final leftJson = _leftDrawingController.toJsonString();
+      final leftHasContent = leftJson.isNotEmpty && leftJson != '[]';
+
+      await _storageService.writeAnnotationsWithMetadata(
+        widget.sheet.uuid,
+        _currentPage,
+        leftHasContent ? leftJson : null,
+        now,
+      );
+
+      // Upload left page to server
+      _syncService.uploadAnnotation(
+        sheetUuid: widget.sheet.uuid,
+        page: _currentPage,
+        annotationsJson: leftJson,
+        lastModified: now,
+      );
+
+      _leftDrawingController.markSaved();
+    }
+
+    // Save right page (two-page mode) only if changed
+    if (widget.config.twoPageMode &&
+        _currentPage < _totalPages &&
+        _rightDrawingController.hasUnsavedChanges) {
+      final rightJson = _rightDrawingController.toJsonString();
+      final rightHasContent = rightJson.isNotEmpty && rightJson != '[]';
+
+      await _storageService.writeAnnotationsWithMetadata(
+        widget.sheet.uuid,
+        _currentPage + 1,
+        rightHasContent ? rightJson : null,
+        now,
+      );
+
+      // Upload right page to server
+      _syncService.uploadAnnotation(
+        sheetUuid: widget.sheet.uuid,
+        page: _currentPage + 1,
+        annotationsJson: rightJson,
+        lastModified: now,
+      );
+
+      _rightDrawingController.markSaved();
+    }
+  }
+
+  // ---------------------------------------------------------------------------
+  // Fullscreen
+  // ---------------------------------------------------------------------------
+
+  @override
+  void onFullScreenChanged(bool enabled, SystemUiMode? systemUiMode) {
+    setState(() {
+      widget.config.fullscreen = enabled;
+      _storageService.writeConfig(widget.config);
+    });
+  }
+
+  void _toggleFullscreen() {
+    FullScreen.setFullScreen(!FullScreen.isFullScreen);
+  }
+
+  // ---------------------------------------------------------------------------
+  // Navigation
+  // ---------------------------------------------------------------------------
+
+  Future<void> _turnPage(int delta) async {
+    // Save current annotations before turning
+    await _saveCurrentAnnotations();
+
+    // Calculate new page
+    final newPage = (_currentPage + delta).clamp(1, _totalPages);
+
+    // Load annotations for new page(s) BEFORE updating state
+    _currentPage = newPage;
+    await _loadAnnotationsForCurrentPages();
+
+    // Now update UI
+    setState(() {});
+  }
+
+  // ---------------------------------------------------------------------------
+  // Mode Switching
+  // ---------------------------------------------------------------------------
+
+  void _togglePaintMode() {
+    if (widget.config.twoPageMode) {
+      _showSnackBar('Paint mode is only available in single page mode');
+      return;
+    }
+
+    if (_isPaintMode) {
+      // Exiting paint mode - save annotations
+      _saveCurrentAnnotations();
+    }
+
+    setState(() => _isPaintMode = !_isPaintMode);
+  }
+
+  void _toggleTwoPageMode() {
+    if (_isPaintMode) {
+      _showSnackBar('Cannot enter two-page mode while painting');
+      return;
+    }
+
+    setState(() {
+      widget.config.twoPageMode = !widget.config.twoPageMode;
+      _storageService.writeConfig(widget.config);
+    });
+
+    // Reload annotations for new mode
+    _loadAnnotationsForCurrentPages();
+  }
+
+  // ---------------------------------------------------------------------------
+  // UI
+  // ---------------------------------------------------------------------------
+
+  @override
+  Widget build(BuildContext context) {
+    return PedalShortcuts(
+      onPageForward: () => _turnPage(1),
+      onPageBackward: () => _turnPage(-1),
+      child: Scaffold(
+        appBar: _buildAppBar(),
+        body: _buildBody(),
+        floatingActionButton: _isPaintMode ? _buildDrawingToolbar() : null,
+        floatingActionButtonLocation: FloatingActionButtonLocation.centerFloat,
+      ),
+    );
+  }
+
+  PreferredSizeWidget? _buildAppBar() {
+    // Hide app bar in fullscreen when document is loaded
+    if (widget.config.fullscreen && _document != null) {
+      return null;
+    }
+
+    return AppBar(
+      title: Text(widget.sheet.name),
+      actions: [
+        IconButton(
+          icon: Icon(
+            widget.config.fullscreen ? Icons.fullscreen_exit : Icons.fullscreen,
+          ),
+          tooltip: widget.config.fullscreen
+              ? 'Exit Fullscreen'
+              : 'Enter Fullscreen',
+          onPressed: _toggleFullscreen,
+        ),
+        IconButton(
+          icon: Icon(_isPaintMode ? Icons.brush : Icons.brush_outlined),
+          tooltip: _isPaintMode ? 'Exit Paint Mode' : 'Enter Paint Mode',
+          onPressed: _togglePaintMode,
+        ),
+        IconButton(
+          icon: Icon(
+            widget.config.twoPageMode ? Icons.filter_1 : Icons.filter_2,
+          ),
+          tooltip: widget.config.twoPageMode
+              ? 'Single Page Mode'
+              : 'Two Page Mode',
+          onPressed: _toggleTwoPageMode,
+        ),
+      ],
+    );
+  }
+
+  Widget _buildBody() {
+    return FutureBuilder<bool>(
+      future: _documentLoaded,
+      builder: (context, snapshot) {
+        if (snapshot.hasError) {
+          _log.warning('Error loading PDF', snapshot.error);
+          return _buildError(snapshot.error.toString());
+        }
+
+        if (snapshot.hasData && _document != null) {
+          return _buildPdfViewer();
+        }
+
+        return const Center(child: CircularProgressIndicator());
+      },
+    );
+  }
+
+  Widget _buildPdfViewer() {
+    final pageDisplay = PdfPageDisplay(
+      document: _document!,
+      numPages: _totalPages,
+      currentPageNumber: _currentPage,
+      config: widget.config,
+      leftDrawingController: _leftDrawingController,
+      rightDrawingController: widget.config.twoPageMode
+          ? _rightDrawingController
+          : null,
+      drawingEnabled: _isPaintMode,
+    );
+
+    // When in paint mode, show the page display directly (DrawingBoard handles zoom/pan)
+    if (_isPaintMode) {
+      return pageDisplay;
+    }
+
+    // When not in paint mode, wrap with touch navigation
+    return TouchNavigationLayer(
+      pageDisplay: pageDisplay,
+      config: widget.config,
+      onToggleFullscreen: _toggleFullscreen,
+      onExit: () => Navigator.pop(context),
+      onPageTurn: _turnPage,
+    );
+  }
+
+  Widget _buildDrawingToolbar() {
+    return SafeArea(
+      child: Padding(
+        padding: const EdgeInsets.only(bottom: 16),
+        child: DrawingToolbar(
+          controller: _leftDrawingController,
+          onClose: _togglePaintMode,
+        ),
+      ),
+    );
+  }
+
+  Widget _buildError(String message) {
+    return Center(
+      child: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Text(
+          message,
+          style: Theme.of(
+            context,
+          ).textTheme.titleMedium?.copyWith(color: Colors.red),
+          textAlign: TextAlign.center,
+        ),
+      ),
+    );
+  }
+
+  void _showSnackBar(String message) {
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(content: Text(message), duration: const Duration(seconds: 2)),
+    );
+  }
+}

lib/features/sheet_viewer/widgets/pdf_page_display.dart

@@ -0,0 +1,197 @@
+import 'dart:math';
+
+import 'package:flutter/material.dart';
+import 'package:pdfrx/pdfrx.dart';
+
+import '../../../core/models/config.dart';
+import '../drawing/drawing.dart';
+
+/// Displays PDF pages with optional two-page mode and drawing overlay.
+class PdfPageDisplay extends StatelessWidget {
+  final PdfDocument document;
+  final int numPages;
+  final int currentPageNumber;
+  final Config config;
+
+  /// Controller for the left/main page drawing
+  final DrawingController? leftDrawingController;
+
+  /// Controller for the right page drawing (two-page mode only)
+  final DrawingController? rightDrawingController;
+
+  /// Whether drawing is enabled
+  final bool drawingEnabled;
+
+  const PdfPageDisplay({
+    super.key,
+    required this.document,
+    required this.numPages,
+    required this.currentPageNumber,
+    required this.config,
+    this.leftDrawingController,
+    this.rightDrawingController,
+    this.drawingEnabled = false,
+  });
+
+  /// Whether two-page mode is active and we have enough pages.
+  bool get _showTwoPages => config.twoPageMode && numPages >= 2;
+
+  @override
+  Widget build(BuildContext context) {
+    return LayoutBuilder(
+      builder: (context, constraints) {
+        final maxSize = Size(constraints.maxWidth, constraints.maxHeight);
+        final (leftSize, rightSize) = calculateScaledPageSizes(maxSize);
+
+        if (_showTwoPages) {
+          // Two-page mode: pages touch each other and are centered together
+          return Center(
+            child: Row(
+              mainAxisSize: MainAxisSize.min,
+              crossAxisAlignment: CrossAxisAlignment.center,
+              children: [
+                _buildPage(
+                  pageNumber: currentPageNumber,
+                  pageSize: leftSize,
+                  controller: leftDrawingController,
+                ),
+                // Only show right page if there is one
+                if (currentPageNumber < numPages)
+                  _buildPage(
+                    pageNumber: currentPageNumber + 1,
+                    pageSize: rightSize!,
+                    controller: rightDrawingController,
+                  )
+                else
+                  // Empty space to keep left page position consistent on last page
+                  SizedBox(width: rightSize!.width, height: rightSize.height),
+              ],
+            ),
+          );
+        }
+
+        // Single page mode
+        return Center(
+          child: _buildPage(
+            pageNumber: currentPageNumber,
+            pageSize: leftSize,
+            controller: leftDrawingController,
+          ),
+        );
+      },
+    );
+  }
+
+  Widget _buildPage({
+    required int pageNumber,
+    required Size pageSize,
+    required DrawingController? controller,
+  }) {
+    final pdfPage = SizedBox(
+      width: pageSize.width,
+      height: pageSize.height,
+      child: Stack(
+        children: [
+          PdfPageView(
+            key: ValueKey(pageNumber),
+            document: document,
+            pageNumber: pageNumber,
+            maximumDpi: 300,
+            alignment: Alignment.center,
+          ),
+          _buildPageIndicator(pageNumber, pageSize),
+        ],
+      ),
+    );
+
+    // If no controller, just show the PDF
+    if (controller == null) {
+      return pdfPage;
+    }
+
+    // Wrap with DrawingBoard
+    return DrawingBoard(
+      boardSize: pageSize,
+      controller: controller,
+      drawingEnabled: drawingEnabled,
+      minScale: 1.0,
+      maxScale: 3.0,
+      alignment: Alignment.center,
+      child: pdfPage,
+    );
+  }
+
+  Widget _buildPageIndicator(int pageNumber, Size pageSize) {
+    return Positioned(
+      bottom: 5,
+      left: 0,
+      right: 0,
+      child: Center(
+        child: Text(
+          '$pageNumber / $numPages',
+          style: const TextStyle(
+            fontSize: 12,
+            color: Colors.black54,
+          ),
+        ),
+      ),
+    );
+  }
+
+  // ---------------------------------------------------------------------------
+  // Page Size Calculations
+  // ---------------------------------------------------------------------------
+
+  /// Calculates scaled page sizes for the current view.
+  ///
+  /// Returns a tuple of (leftPageSize, rightPageSize).
+  /// rightPageSize is null when not in two-page mode.
+  (Size, Size?) calculateScaledPageSizes(Size parentSize) {
+    if (config.twoPageMode) {
+      return _calculateTwoPageSizes(parentSize);
+    }
+    return (_calculateSinglePageSize(parentSize), null);
+  }
+
+  (Size, Size?) _calculateTwoPageSizes(Size parentSize) {
+    final leftSize = _getUnscaledPageSize(currentPageNumber);
+    final rightSize = numPages > currentPageNumber
+        ? _getUnscaledPageSize(currentPageNumber + 1)
+        : leftSize;
+
+    // Combine pages for scaling calculation
+    final combinedSize = Size(
+      leftSize.width + rightSize.width,
+      max(leftSize.height, rightSize.height),
+    );
+
+    final scaledCombined = _scaleToFit(parentSize, combinedSize);
+    final scaleFactor = scaledCombined.width / combinedSize.width;
+
+    return (leftSize * scaleFactor, rightSize * scaleFactor);
+  }
+
+  Size _calculateSinglePageSize(Size parentSize) {
+    return _scaleToFit(parentSize, _getUnscaledPageSize(currentPageNumber));
+  }
+
+  Size _getUnscaledPageSize(int pageNumber) {
+    return document.pages.elementAt(pageNumber - 1).size;
+  }
+
+  /// Scales a page size to fit within parent bounds while maintaining aspect ratio.
+  Size _scaleToFit(Size parentSize, Size pageSize) {
+    // Determine if height or width is the limiting factor
+    if (parentSize.aspectRatio > pageSize.aspectRatio) {
+      // Constrained by height
+      final height = parentSize.height;
+      final width = height * pageSize.aspectRatio;
+      return Size(width, height);
+    } else {
+      // Constrained by width
+      final width = parentSize.width;
+      final height = width / pageSize.aspectRatio;
+      return Size(width, height);
+    }
+  }
+}

lib/features/sheet_viewer/widgets/touch_navigation_layer.dart

@@ -0,0 +1,126 @@
+import 'package:flutter/material.dart';
+
+import '../../../core/models/config.dart';
+import 'pdf_page_display.dart';
+
+/// Callback for page turn events.
+typedef PageTurnCallback = dynamic Function(int delta);
+
+/// Gesture layer for touch-based navigation over PDF pages.
+///
+/// Touch zones:
+/// - Top 2cm: Toggle fullscreen (or exit if in fullscreen + top-right corner)
+/// - Left side: Turn page backward (-1 or -2 in two-page mode)
+/// - Right side: Turn page forward (+1 or +2 in two-page mode)
+class TouchNavigationLayer extends StatelessWidget {
+  final PdfPageDisplay pageDisplay;
+  final Config config;
+  final VoidCallback onToggleFullscreen;
+  final VoidCallback onExit;
+  final PageTurnCallback onPageTurn;
+
+  const TouchNavigationLayer({
+    super.key,
+    required this.pageDisplay,
+    required this.config,
+    required this.onToggleFullscreen,
+    required this.onExit,
+    required this.onPageTurn,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      behavior: HitTestBehavior.opaque,
+      onTapUp: (details) => _handleTap(context, details),
+      child: pageDisplay,
+    );
+  }
+
+  void _handleTap(BuildContext context, TapUpDetails details) {
+    final mediaQuery = MediaQuery.of(context);
+    final position = details.localPosition;
+
+    // Calculate physical measurements for consistent touch zones
+    final pixelsPerCm = _calculatePixelsPerCm(mediaQuery.devicePixelRatio);
+    final touchZoneHeight = 2 * pixelsPerCm;
+    final touchZoneWidth = 2 * pixelsPerCm;
+
+    final screenWidth = mediaQuery.size.width;
+    final screenCenter = screenWidth / 2;
+
+    // Get page sizes for accurate touch zone calculation
+    final (leftPageSize, rightPageSize) = pageDisplay.calculateScaledPageSizes(
+      mediaQuery.size,
+    );
+
+    // Check top zone first
+    if (position.dy < touchZoneHeight) {
+      _handleTopZoneTap(position, screenWidth, touchZoneWidth);
+      return;
+    }
+
+    // Handle page turning based on tap position
+    _handlePageTurnTap(position, screenCenter, leftPageSize, rightPageSize);
+  }
+
+  void _handleTopZoneTap(
+    Offset position,
+    double screenWidth,
+    double touchZoneWidth,
+  ) {
+    // Top-right corner in fullscreen mode = exit
+    if (config.fullscreen && position.dx >= screenWidth - touchZoneWidth) {
+      onExit();
+    } else {
+      onToggleFullscreen();
+    }
+  }
+
+  void _handlePageTurnTap(
+    Offset position,
+    double screenCenter,
+    Size leftPageSize,
+    Size? rightPageSize,
+  ) {
+    final isLeftSide = position.dx < screenCenter;
+
+    if (config.twoPageMode) {
+      _handleTwoPageModeTap(
+        position,
+        screenCenter,
+        leftPageSize,
+        rightPageSize,
+      );
+    } else {
+      // Single page mode: simple left/right
+      onPageTurn(isLeftSide ? -1 : 1);
+    }
+  }
+
+  void _handleTwoPageModeTap(
+    Offset position,
+    double screenCenter,
+    Size leftPageSize,
+    Size? rightPageSize,
+  ) {
+    final leftEdge = screenCenter - leftPageSize.width / 2;
+    final rightEdge = screenCenter + (rightPageSize?.width ?? 0) / 2;
+
+    if (position.dx < leftEdge) {
+      onPageTurn(-2);
+    } else if (position.dx < screenCenter) {
+      onPageTurn(-1);
+    } else if (position.dx > rightEdge) {
+      onPageTurn(2);
+    } else {
+      onPageTurn(1);
+    }
+  }
+
+  double _calculatePixelsPerCm(double devicePixelRatio) {
+    const baseDpi = 160.0; // Android baseline DPI
+    const cmPerInch = 2.54;
+    return (devicePixelRatio * baseDpi) / cmPerInch;
+  }
+}

lib/home_page.dart

@@ -1,236 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:flutter_fullscreen/flutter_fullscreen.dart';
-import 'package:logging/logging.dart';
-import 'package:sheetless/login_page.dart';
-import 'package:sheetless/main.dart';
-import 'package:sheetless/sheet_viewer_page.dart';
-import 'package:sheetless/storage_helper.dart';
-import 'package:package_info_plus/package_info_plus.dart';
-
-import 'api.dart';
-import 'sheet.dart';
-
-class MyHomePage extends StatefulWidget {
-  final Config config;
-
-  const MyHomePage({super.key, required this.config});
-
-  @override
-  State<MyHomePage> createState() => _MyHomePageState();
-}
-
-class _MyHomePageState extends State<MyHomePage> with RouteAware {
-  ApiClient? apiClient;
-  Future<bool> apiLoggedIn = Future.value(false);
-  final StorageHelper _storageHelper = StorageHelper();
-  final log = Logger("MyHomePage");
-  String? appName;
-  String? appVersion;
-  bool shuffling = false;
-  late Future<List<Sheet>> sheets;
-
-  @override
-  void initState() {
-    // Deactivate fullscreen by default
-    FullScreen.setFullScreen(false);
-
-    // So RouteAware gets bound
-    WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
-      routeObserver.subscribe(this, ModalRoute.of(context)!);
-    });
-
-    super.initState();
-    _loadAppInfo();
-    sheets = acquireSheets();
-  }
-
-  @override
-  void dispose() {
-    super.dispose();
-  }
-
-  @override
-  void didPush() {
-    FullScreen.setFullScreen(false);
-    super.didPush();
-  }
-
-  @override
-  void didPopNext() {
-    FullScreen.setFullScreen(false);
-    super.didPopNext();
-  }
-
-  Future<void> _loadAppInfo() async {
-    final info = await PackageInfo.fromPlatform();
-    setState(() {
-      appName = info.appName;
-      appVersion = info.version;
-    });
-  }
-
-  Future<List<Sheet>> acquireSheets() async {
-    final url = await _storageHelper.readSecure(SecureStorageKey.url);
-    final jwt = await _storageHelper.readSecure(SecureStorageKey.jwt);
-    apiClient = ApiClient(baseUrl: url!, token: jwt);
-    // TODO: check if really logged in
-    final sheets = await apiClient!.fetchSheets();
-    log.info("${sheets.length} sheets fetched");
-    final sheetsSorted = await sortSheetsByRecency(sheets);
-    log.info("${sheetsSorted.length} sheets sorted");
-
-    // TODO: make work
-    // final changeQueue = await _storageHelper.readChangeQueue();
-    // changeQueue.applyToSheets(sheetsSorted);
-    // log.info("${changeQueue.length()} changes applied");
-
-    return sheetsSorted;
-  }
-
-  Future<List<Sheet>> sortSheetsByRecency(List<Sheet> sheets) async {
-    final accessTimes = await _storageHelper.readSheetAccessTimes();
-
-    sheets.sort((a, b) {
-      var dateA = accessTimes[a.uuid];
-      var dateB = accessTimes[b.uuid];
-
-      if (dateA == null || a.updatedAt.isAfter(dateA)) {
-        dateA = a.updatedAt;
-      }
-      if (dateB == null || b.updatedAt.isAfter(dateB)) {
-        dateB = b.updatedAt;
-      }
-
-      return dateB.compareTo(dateA);
-    });
-
-    return sheets;
-  }
-
-  Future<void> _refreshSheets() async {
-    setState(() {
-      sheets = acquireSheets();
-    });
-  }
-
-  Future<void> _logOut() async {
-    // Delete saved jwt
-    await _storageHelper.writeSecure(SecureStorageKey.jwt, null);
-
-    if (!mounted) return; // Widget already removed
-
-    Navigator.of(
-      context,
-    ).pushReplacement(MaterialPageRoute(builder: (_) => LoginPage()));
-  }
-
-  void switchShufflingState(bool newState) async {
-    if (newState) {
-      (await sheets).shuffle();
-    } else {
-      sheets = sortSheetsByRecency(await sheets);
-    }
-
-    setState(() {
-      shuffling = newState;
-    });
-  }
-
-  Drawer _buildDrawer() {
-    return Drawer(
-      child: SafeArea(
-        child: Padding(
-          padding: EdgeInsetsGeometry.directional(start: 10, end: 10, top: 30),
-          child: Column(
-            mainAxisAlignment: MainAxisAlignment.spaceBetween,
-            children: [
-              // Drawer Actions
-              Column(
-                children: [
-                  ListTile(
-                    leading: Icon(
-                      Icons.shuffle,
-                      color: shuffling ? Colors.blue : null,
-                    ),
-                    title: const Text('Shuffle'),
-                    onTap: () {
-                      switchShufflingState(!shuffling);
-                    },
-                  ),
-                  ListTile(
-                    leading: const Icon(Icons.logout),
-                    title: const Text('Logout'),
-                    onTap: _logOut,
-                  ),
-                ],
-              ),
-
-              // App Info at bottom
-              Padding(
-                padding: const EdgeInsets.all(16.0),
-                child: Text(
-                  '$appName v$appVersion',
-                  style: const TextStyle(color: Colors.grey),
-                ),
-              ),
-            ],
-          ),
-        ),
-      ),
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      // Icon for drawer appears automatically
-      appBar: AppBar(title: const Text("Sheetless")),
-      endDrawer: _buildDrawer(),
-      body: RefreshIndicator(
-        onRefresh: _refreshSheets,
-        child: FutureBuilder(
-          future: sheets,
-          builder: (BuildContext context, AsyncSnapshot<List<Sheet>> snapshot) {
-            if (snapshot.connectionState != ConnectionState.done) {
-              return const Center(child: CircularProgressIndicator());
-            }
-            if (snapshot.hasData) {
-              return SheetsWidget(
-                sheets: snapshot.data!,
-                onSheetOpenRequest: (sheet) {
-                  _storageHelper.writeSheetAccessTime(
-                    sheet.uuid,
-                    DateTime.now(),
-                  );
-                  Navigator.push(
-                    context,
-                    MaterialPageRoute(
-                      builder: (context) => SheetViewerPage(
-                        sheet: sheet,
-                        apiClient: apiClient!,
-                        config: widget.config,
-                      ),
-                    ),
-                  );
-                },
-              );
-            } else if (snapshot.hasError) {
-              log.warning("Error loading sheets:", snapshot.error);
-              return Center(
-                child: Text(
-                  style: Theme.of(
-                    context,
-                  ).textTheme.displaySmall!.copyWith(color: Colors.red),
-                  textAlign: TextAlign.center,
-                  snapshot.error.toString(),
-                ),
-              );
-            } else {
-              return const Center(child: CircularProgressIndicator());
-            }
-          },
-        ),
-      ),
-    );
-  }
-}

lib/login_page.dart

@@ -1,159 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:jwt_decoder/jwt_decoder.dart';
-import 'package:logging/logging.dart';
-import 'package:sheetless/api.dart';
-import 'package:sheetless/home_page.dart';
-import 'package:sheetless/storage_helper.dart';
-
-class LoginPage extends StatefulWidget {
-  const LoginPage({super.key});
-
-  @override
-  State<LoginPage> createState() => _LoginPageState();
-}
-
-class _LoginPageState extends State<LoginPage> {
-  final log = Logger("_LoginPageState");
-
-  final TextEditingController _urlController = TextEditingController(
-    text: "https://sheetable.julian-mutter.de",
-  );
-  final TextEditingController _usernameController = TextEditingController();
-  final TextEditingController _passwordController = TextEditingController();
-
-  final _formKey = GlobalKey<FormState>();
-
-  final StorageHelper _storageHelper = StorageHelper();
-  String? _error;
-  bool loggingIn = false;
-
-  @override
-  void initState() {
-    super.initState();
-    _restoreStoredValues();
-  }
-
-  Future<void> _restoreStoredValues() async {
-    final jwt = await _storageHelper.readSecure(SecureStorageKey.jwt);
-    if (jwt != null && await _isJwtValid(jwt)) {
-      await _navigateToMainPage();
-      return;
-    }
-    final url = await _storageHelper.readSecure(SecureStorageKey.url);
-    final username = await _storageHelper.readSecure(SecureStorageKey.email);
-    if (url != null) {
-      _urlController.text = url;
-    }
-    if (username != null) {
-      _usernameController.text = username;
-    }
-  }
-
-  Future<bool> _isJwtValid(String jwt) async {
-    try {
-      bool expired = JwtDecoder.isExpired(jwt);
-      return !expired;
-    } on FormatException {
-      return false;
-    }
-  }
-
-  Future<void> _login(
-      String serverUrl, String username, String password) async {
-    setState(() {
-      _error = null;
-    });
-    final apiClient = ApiClient(baseUrl: serverUrl);
-    try {
-      await apiClient.login(username, password);
-
-      await _storageHelper.writeSecure(SecureStorageKey.url, serverUrl);
-      await _storageHelper.writeSecure(SecureStorageKey.jwt, apiClient.token!);
-      await _storageHelper.writeSecure(SecureStorageKey.email, username);
-      await _navigateToMainPage();
-    } catch (e) {
-      setState(() {
-        _error = "Login failed.\n$e";
-      });
-    }
-  }
-
-  Future<void> _navigateToMainPage() async {
-    final config = await _storageHelper.readConfig();
-    Navigator.of(context).pushReplacement(
-      MaterialPageRoute(builder: (_) => MyHomePage(config: config)),
-    );
-  }
-
-  String? validateNotEmpty(String? content) {
-    if (content == null || content.isEmpty) {
-      return "Do not leave this field empty";
-    }
-    return null;
-  }
-
-  void handleLoginPressed() async {
-    if (loggingIn) return;
-
-    loggingIn = true;
-    if (_formKey.currentState!.validate()) {
-      await _login(
-        _urlController.text,
-        _usernameController.text,
-        _passwordController.text,
-      );
-    }
-    loggingIn = false;
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(title: Text('Login')),
-      body: Padding(
-        padding: const EdgeInsets.all(16.0),
-        child: Form(
-          key: _formKey,
-          child: Column(
-            mainAxisAlignment: MainAxisAlignment.center,
-            children: [
-              TextFormField(
-                controller: _urlController,
-                validator: validateNotEmpty,
-                decoration: InputDecoration(labelText: 'Url'),
-                textInputAction: TextInputAction.next,
-              ),
-              TextFormField(
-                controller: _usernameController,
-                validator: validateNotEmpty,
-                decoration: InputDecoration(labelText: 'Username'),
-                textInputAction: TextInputAction.next,
-              ),
-              TextFormField(
-                controller: _passwordController,
-                validator: validateNotEmpty,
-                // focusNode: _passwordFocusNode,
-                decoration: InputDecoration(labelText: 'Password'),
-                obscureText: true,
-                textInputAction: TextInputAction
-                    .next, // with submit or go, onFieldSubmitted is not called
-                onFieldSubmitted: (_) => handleLoginPressed(),
-              ),
-              // ),
-              SizedBox(height: 5),
-              ElevatedButton(
-                onPressed: loggingIn ? null : handleLoginPressed,
-                child: Text('Login'),
-              ),
-              if (_error != null)
-                Padding(
-                  padding: const EdgeInsets.only(top: 8.0),
-                  child: Text(_error!, style: TextStyle(color: Colors.red)),
-                ),
-            ],
-          ),
-        ),
-      ),
-    );
-  }
-}

lib/main.dart

@@ -1,49 +1,47 @@
-import 'dart:io';
-
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_fullscreen/flutter_fullscreen.dart';
 import 'package:hive/hive.dart';
 import 'package:logging/logging.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:pdfrx/pdfrx.dart';
-import 'package:flutter_fullscreen/flutter_fullscreen.dart';
 
-import 'login_page.dart';
+import 'app.dart';
 
-final RouteObserver<ModalRoute> routeObserver = RouteObserver<ModalRoute>();
+/// Application entry point.
+///
+/// Performs platform-specific initialization before running the app
 Future<void> main() async {
-  Logger.root.level = Level.ALL; // defaults to Level.INFO
+  WidgetsFlutterBinding.ensureInitialized();
+
+  await _initializeLogging();
+  await _initializePlugins();
+
+  runApp(const SheetlessApp());
+}
+
+/// Configures the logging system.
+Future<void> _initializeLogging() async {
+  Logger.root.level = Level.ALL;
   Logger.root.onRecord.listen((record) {
     debugPrint('${record.level.name}: ${record.time}: ${record.message}');
     if (record.error != null) {
       debugPrint('${record.error}');
     }
   });
+}
 
-  // setup for flutter_fullscreen
+/// Initializes platform-specific plugins and services.
-  WidgetsFlutterBinding.ensureInitialized(); // Needs to be initialized first, otherwise app gets stuck in splash screen
+Future<void> _initializePlugins() async {
+  // Fullscreen support
   await FullScreen.ensureInitialized();
 
-  pdfrxFlutterInitialize(); // Needed especially for web
+  // PDF rendering (especially needed for web)
+  pdfrxFlutterInitialize();
 
+  // Local storage (not supported on web)
   if (!kIsWeb) {
-    Directory dir = await getApplicationDocumentsDirectory();
+    final dir = await getApplicationDocumentsDirectory();
-    Hive.init(dir.path); // Needed only if not web
+    Hive.init(dir.path);
-  }
-
-  runApp(const MyApp());
-}
-
-class MyApp extends StatelessWidget {
-  const MyApp({super.key});
-
-  @override
-  Widget build(BuildContext context) {
-    return MaterialApp(
-      title: 'Sheetless',
-      theme: ThemeData(useMaterial3: true, primarySwatch: Colors.blue),
-      home: const LoginPage(),
-      navigatorObservers: [routeObserver],
-    );
   }
 }

lib/shared/input/pedal_shortcuts.dart

@@ -0,0 +1,40 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+/// Widget that handles Bluetooth pedal and keyboard shortcuts for page turning.
+///
+/// Listens for arrow key presses and invokes the appropriate callback:
+/// - Arrow Down/Right: Turn page forward
+/// - Arrow Up/Left: Turn page backward
+class PedalShortcuts extends StatelessWidget {
+  final Widget child;
+  final VoidCallback onPageForward;
+  final VoidCallback onPageBackward;
+
+  const PedalShortcuts({
+    super.key,
+    required this.child,
+    required this.onPageForward,
+    required this.onPageBackward,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return CallbackShortcuts(
+      bindings: _buildBindings(),
+      child: Focus(autofocus: true, child: child),
+    );
+  }
+
+  Map<ShortcutActivator, VoidCallback> _buildBindings() {
+    return {
+      // Forward navigation
+      const SingleActivator(LogicalKeyboardKey.arrowDown): onPageForward,
+      const SingleActivator(LogicalKeyboardKey.arrowRight): onPageForward,
+
+      // Backward navigation
+      const SingleActivator(LogicalKeyboardKey.arrowUp): onPageBackward,
+      const SingleActivator(LogicalKeyboardKey.arrowLeft): onPageBackward,
+    };
+  }
+}

lib/shared/widgets/edit_sheet_bottom_sheet.dart

@@ -0,0 +1,103 @@
+import 'package:flutter/material.dart';
+
+import '../../core/models/sheet.dart';
+
+/// Callback when sheet metadata is saved.
+typedef SheetEditCallback = void Function(String newName, String newComposer);
+
+/// Bottom sheet for editing sheet metadata (name and composer).
+class EditSheetBottomSheet extends StatefulWidget {
+  final Sheet sheet;
+  final SheetEditCallback onSave;
+
+  const EditSheetBottomSheet({
+    super.key,
+    required this.sheet,
+    required this.onSave,
+  });
+
+  @override
+  State<EditSheetBottomSheet> createState() => _EditSheetBottomSheetState();
+}
+
+class _EditSheetBottomSheetState extends State<EditSheetBottomSheet> {
+  final _formKey = GlobalKey<FormState>();
+  late final TextEditingController _nameController;
+  late final TextEditingController _composerController;
+
+  @override
+  void initState() {
+    super.initState();
+    _nameController = TextEditingController(text: widget.sheet.name);
+    _composerController = TextEditingController(text: widget.sheet.composer);
+  }
+
+  @override
+  void dispose() {
+    _nameController.dispose();
+    _composerController.dispose();
+    super.dispose();
+  }
+
+  void _handleSave() {
+    if (!_formKey.currentState!.validate()) return;
+
+    widget.onSave(_nameController.text.trim(), _composerController.text.trim());
+    Navigator.pop(context);
+  }
+
+  String? _validateNotEmpty(String? value) {
+    if (value == null || value.trim().isEmpty) {
+      return 'This field cannot be empty';
+    }
+    return null;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: EdgeInsets.fromLTRB(
+        16,
+        16,
+        16,
+        MediaQuery.of(context).viewInsets.bottom + 16,
+      ),
+      child: Form(
+        key: _formKey,
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.stretch,
+          children: [
+            Text(
+              'Edit Sheet',
+              style: Theme.of(context).textTheme.titleLarge,
+              textAlign: TextAlign.center,
+            ),
+            const SizedBox(height: 16),
+            TextFormField(
+              controller: _nameController,
+              validator: _validateNotEmpty,
+              decoration: const InputDecoration(
+                labelText: 'Sheet Name',
+                border: OutlineInputBorder(),
+              ),
+              textInputAction: TextInputAction.next,
+            ),
+            const SizedBox(height: 12),
+            TextFormField(
+              controller: _composerController,
+              decoration: const InputDecoration(
+                labelText: 'Composer',
+                border: OutlineInputBorder(),
+              ),
+              textInputAction: TextInputAction.done,
+              onFieldSubmitted: (_) => _handleSave(),
+            ),
+            const SizedBox(height: 16),
+            ElevatedButton(onPressed: _handleSave, child: const Text('Save')),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/sheet.dart

@@ -1,185 +0,0 @@
-import 'dart:async';
-import 'dart:ui';
-import 'package:flutter/material.dart';
-import 'package:sheetless/edit_bottom_sheet.dart';
-import 'package:sheetless/storage_helper.dart';
-import 'package:sheetless/upload_queue.dart';
-
-class Sheet {
-  final String uuid;
-  String name;
-  String composerUuid;
-  String composerName;
-  DateTime updatedAt;
-
-  Sheet({
-    required this.uuid,
-    required this.name,
-    required this.composerUuid,
-    required this.composerName,
-    required this.updatedAt,
-  });
-
-  // Factory constructor for creating a Sheet from JSON
-  factory Sheet.fromJson(Map<String, dynamic> json) {
-    final composer = json['composer'] as Map<String, dynamic>?;
-    return Sheet(
-      uuid: json['uuid'].toString(),
-      name: json['title'],
-      composerUuid: json['composer_uuid']?.toString() ?? '',
-      composerName: composer?['name'] ?? 'Unknown',
-      updatedAt: DateTime.parse(json['updated_at']),
-    );
-  }
-}
-
-class SheetsWidget extends StatefulWidget {
-  final List<Sheet> sheets;
-  final ValueSetter<Sheet> onSheetOpenRequest;
-
-  const SheetsWidget({
-    super.key,
-    required this.sheets,
-    required this.onSheetOpenRequest,
-  });
-
-  @override
-  State<SheetsWidget> createState() => _SheetsWidgetState();
-}
-
-class _SheetsWidgetState extends State<SheetsWidget> {
-  late List<Sheet> filteredSheets;
-  final StorageHelper storageHelper = StorageHelper();
-  final TextEditingController _searchController = TextEditingController();
-  Timer? _debounce;
-
-  @override
-  void initState() {
-    super.initState();
-    filteredSheets = widget.sheets;
-    _searchController.addListener(_onSearchChanged);
-  }
-
-  @override
-  void dispose() {
-    _searchController.removeListener(_onSearchChanged);
-    _searchController.dispose();
-    _debounce?.cancel();
-    super.dispose();
-  }
-
-  void _onSearchChanged() {
-    if (_debounce?.isActive ?? false) _debounce!.cancel();
-
-    _debounce = Timer(const Duration(milliseconds: 500), () {
-      _filterSheets();
-    });
-  }
-
-  void _filterSheets() {
-    setState(() {
-      String query = _searchController.text.toLowerCase().trim();
-      List<String> terms = query.split(RegExp(r'\s+')); // Split by whitespace
-
-      filteredSheets = widget.sheets.where((sheet) {
-        String name = sheet.name.toLowerCase();
-        String composer = sheet.composerName.toLowerCase();
-
-        // Each term must be found in either the name or composer
-        return terms.every(
-          (term) => name.contains(term) || composer.contains(term),
-        );
-      }).toList();
-    });
-  }
-
-  void _clearSearch() {
-    _searchController.clear();
-  }
-
-  void _openEditSheet(BuildContext context, Sheet sheet) {
-    showModalBottomSheet(
-      context: context,
-      isScrollControlled: true,
-      builder: (_) => EditItemBottomSheet(
-        sheet: sheet,
-        onSheetEdited: (String newName, String newComposer) {
-          if (newName != sheet.name) {
-            storageHelper.writeChange(
-              Change(
-                type: ChangeType.sheetNameChange,
-                sheetUuid: sheet.uuid,
-                value: newName,
-              ),
-            );
-          }
-          if (newComposer != sheet.composerName) {
-            storageHelper.writeChange(
-              Change(
-                type: ChangeType.composerNameChange,
-                sheetUuid: sheet.uuid,
-                value: newComposer,
-              ),
-            );
-          }
-          setState(() {
-            sheet.name = newName;
-            sheet.composerName = newComposer;
-          });
-        },
-      ),
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Column(
-      children: [
-        Padding(
-          padding: const EdgeInsets.all(8.0),
-          child: TextField(
-            controller: _searchController,
-            decoration: InputDecoration(
-              hintText: 'Search...',
-              prefixIcon: const Icon(Icons.search),
-              suffixIcon: _searchController.text.isNotEmpty
-                  ? IconButton(
-                      icon: const Icon(Icons.clear),
-                      onPressed: _clearSearch,
-                    )
-                  : null,
-              border: OutlineInputBorder(
-                borderRadius: BorderRadius.circular(8.0),
-              ),
-            ),
-          ),
-        ),
-        Expanded(
-          // Fixes scroll on web
-          child: ScrollConfiguration(
-            behavior: ScrollConfiguration.of(context).copyWith(
-              dragDevices: {PointerDeviceKind.touch, PointerDeviceKind.mouse},
-            ),
-            child: ListView.builder(
-              physics: const AlwaysScrollableScrollPhysics(),
-              itemCount: filteredSheets.length,
-              itemBuilder: (context, index) {
-                var sheet = filteredSheets[index];
-                return ListTile(
-                  title: Text(sheet.name),
-                  subtitle: Text(sheet.composerName),
-                  onTap: () => setState(() {
-                    widget.onSheetOpenRequest(sheet);
-                    widget.sheets.remove(sheet);
-                    widget.sheets.insert(0, sheet);
-                  }),
-                  onLongPress: () => _openEditSheet(context, sheet),
-                );
-              },
-            ),
-          ),
-        ),
-      ],
-    );
-  }
-}

lib/sheet_viewer_page.dart

@@ -1,426 +0,0 @@
-import 'dart:math';
-
-import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
-import 'package:flutter_drawing_board/flutter_drawing_board.dart';
-import 'package:logging/logging.dart';
-import 'package:pdfrx/pdfrx.dart';
-import 'package:sheetless/api.dart';
-import 'package:sheetless/bt_pedal_shortcuts.dart';
-import 'package:sheetless/sheet.dart';
-import 'package:sheetless/storage_helper.dart';
-import 'package:flutter_fullscreen/flutter_fullscreen.dart';
-
-class SheetViewerPage extends StatefulWidget {
-  final Sheet sheet;
-  final ApiClient apiClient;
-  final Config config;
-
-  const SheetViewerPage({
-    super.key,
-    required this.sheet,
-    required this.apiClient,
-    required this.config,
-  });
-
-  @override
-  State<SheetViewerPage> createState() => _SheetViewerPageState();
-}
-
-class _SheetViewerPageState extends State<SheetViewerPage>
-    with FullScreenListener {
-  final log = Logger("SheetViewerPage");
-  final StorageHelper storageHelper = StorageHelper();
-
-  int currentPageNumber = 1;
-  int numPages = 1;
-  late Future<bool> documentLoaded;
-  PdfDocument? document;
-  bool paintMode = false;
-  Pages? pages;
-
-  @override
-  void initState() {
-    FullScreen.addListener(this);
-
-    // Load saved fullscreen
-    FullScreen.setFullScreen(widget.config.fullscreen);
-
-    super.initState();
-    documentLoaded = loadPdf();
-  }
-
-  @override
-  void dispose() {
-    FullScreen.removeListener(this);
-    document?.dispose(); // Make sure document gets garbage collected
-    super.dispose();
-  }
-
-  Future<bool> loadPdf() async {
-    if (kIsWeb) {
-      final data = await widget.apiClient.fetchPdfFileData(widget.sheet.uuid);
-
-      document = await PdfDocument.openData(data);
-    } else {
-      final file = await widget.apiClient.getPdfFileCached(widget.sheet.uuid);
-
-      document = await PdfDocument.openFile(file.path);
-    }
-    setState(() {
-      // document changed
-    });
-    return true;
-  }
-
-  @override
-  void onFullScreenChanged(bool enabled, SystemUiMode? systemUiMode) {
-    setState(() {
-      widget.config.fullscreen = enabled;
-      storageHelper.writeConfig(widget.config);
-    });
-  }
-
-  void toggleFullscreen() {
-    FullScreen.setFullScreen(!widget.config.fullscreen);
-  }
-
-  void turnPage(int numTurns) {
-    setState(() {
-      currentPageNumber += numTurns;
-      currentPageNumber = currentPageNumber.clamp(1, numPages);
-    });
-  }
-
-  AppBar? buildAppBar() {
-    if (widget.config.fullscreen && document != null) {
-      return null;
-    }
-    return AppBar(
-      title: Text(widget.sheet.name),
-      actions: [
-        IconButton(
-          icon: Icon(
-            widget.config.fullscreen ? Icons.fullscreen_exit : Icons.fullscreen,
-          ),
-          tooltip: widget.config.fullscreen
-              ? 'Exit Fullscreen'
-              : 'Enter Fullscreen',
-          onPressed: () {
-            toggleFullscreen();
-          },
-        ),
-        IconButton(
-          onPressed: () {
-            setState(() {
-              if (widget.config.twoPageMode) {
-                // TODO: notification that paint mode only in single page mode
-              } else {
-                paintMode = !paintMode;
-              }
-            });
-          },
-          icon: Icon(Icons.brush),
-        ),
-        IconButton(
-          onPressed: () {
-            setState(() {
-              widget.config.twoPageMode = !widget.config.twoPageMode;
-              storageHelper.writeConfig(widget.config);
-              if (widget.config.twoPageMode) {
-                paintMode = false;
-                // TODO: notification that paint mode was deactivated since only possible in single page mode
-              }
-            });
-          },
-          icon: Icon(
-            widget.config.twoPageMode ? Icons.filter_1 : Icons.filter_2,
-          ),
-        ),
-      ],
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return BtPedalShortcuts(
-      onTurnPageForward: () => turnPage(1),
-      onTurnPageBackward: () => turnPage(-1),
-      child: Scaffold(
-        appBar: buildAppBar(),
-        body: FutureBuilder(
-          future: documentLoaded,
-          builder: (BuildContext context, AsyncSnapshot<bool> snapshot) {
-            if (snapshot.hasData && document != null) {
-              numPages = document!.pages.length;
-              pages = Pages(
-                document: document!,
-                numPages: numPages,
-                config: widget.config,
-                currentPageNumber: currentPageNumber,
-              );
-
-              return Stack(
-                children: [
-                  Stack(
-                    children: [
-                      Visibility(
-                        visible: !paintMode,
-                        child: TouchablePages(
-                          pages: pages!,
-                          onToggleFullscreen: () {
-                            toggleFullscreen();
-                          },
-                          onExitSheetViewer: () {
-                            Navigator.pop(context);
-                          },
-                          onTurnPage: (int numTurns) {
-                            turnPage(numTurns);
-                          },
-                        ),
-                      ),
-                      Visibility(
-                        visible: paintMode,
-                        child: PaintablePages(pages: pages!),
-                      ),
-                    ],
-                  ),
-                ],
-              );
-            } else if (snapshot.hasError) {
-              log.warning("Error loading pdf:", snapshot.error);
-              return Center(
-                child: Text(
-                  style: Theme.of(
-                    context,
-                  ).textTheme.displaySmall!.copyWith(color: Colors.red),
-                  textAlign: TextAlign.center,
-                  snapshot.error.toString(),
-                ),
-              );
-            } else {
-              return const Center(child: CircularProgressIndicator());
-            }
-          },
-        ),
-      ),
-    );
-  }
-}
-
-typedef PageturnCallback = void Function(int numTurns);
-
-class TouchablePages extends StatelessWidget {
-  final Pages pages;
-  final VoidCallback onToggleFullscreen;
-  final VoidCallback onExitSheetViewer;
-  final PageturnCallback onTurnPage;
-
-  const TouchablePages({
-    super.key,
-    required this.pages,
-    required this.onToggleFullscreen,
-    required this.onExitSheetViewer,
-    required this.onTurnPage,
-  });
-
-  @override
-  Widget build(BuildContext context) {
-    return GestureDetector(
-      behavior:
-          HitTestBehavior.opaque, // Also register when outside of pdf pages
-      onTapUp: (TapUpDetails details) {
-        final mediaQuery = MediaQuery.of(context);
-        final pixelsPerInch =
-            mediaQuery.devicePixelRatio *
-            160; // 160 dpi = 1 logical inch baseline
-        final pixelsPerCm = pixelsPerInch / 2.54;
-
-        final touchAreaWidth = mediaQuery.size.width;
-
-        final (leftPageSize, rightPageSize) = pages.calcPageSizesScaled(
-          mediaQuery.size,
-        );
-
-        if (details.localPosition.dy < 2 * pixelsPerCm &&
-            details.localPosition.dx >= touchAreaWidth - 2 * pixelsPerCm &&
-            pages.config.fullscreen) {
-          onExitSheetViewer();
-        } else if (details.localPosition.dy < 2 * pixelsPerCm) {
-          onToggleFullscreen();
-        } else if (pages.config.twoPageMode &&
-            details.localPosition.dx <
-                touchAreaWidth / 2 - leftPageSize.width / 2) {
-          onTurnPage(-2);
-        } else if (details.localPosition.dx < touchAreaWidth / 2) {
-          onTurnPage(-1);
-        } else if (pages.config.twoPageMode &&
-            details.localPosition.dx >
-                touchAreaWidth / 2 + rightPageSize!.width / 2) {
-          onTurnPage(2);
-        } else {
-          onTurnPage(1);
-        }
-      },
-      child: pages,
-    );
-  }
-}
-
-class PaintablePages extends StatelessWidget {
-  final Pages pages;
-
-  const PaintablePages({super.key, required this.pages});
-
-  @override
-  Widget build(BuildContext context) {
-    return SizedBox.expand(
-      child: LayoutBuilder(
-        builder: (context, constraints) {
-          final maxSize = Size(constraints.maxWidth, constraints.maxHeight);
-          final (pageSizeScaled, _) = pages.calcPageSizesScaled(maxSize);
-          return DrawingBoard(
-            background: SizedBox(
-              width: pageSizeScaled.width,
-              height: pageSizeScaled.height,
-              child: pages,
-            ),
-            // showDefaultTools: true,
-            // showDefaultActions: true,
-            boardConstrained: true,
-            minScale: 1,
-            maxScale: 3,
-            alignment: Alignment.topRight,
-            boardBoundaryMargin: EdgeInsets.all(0),
-          );
-        },
-      ),
-    );
-  }
-}
-
-class Pages extends StatelessWidget {
-  final PdfDocument document;
-  final int numPages;
-  final int currentPageNumber; // Starts at 1
-  final Config config;
-
-  const Pages({
-    super.key,
-    required this.document,
-    required this.numPages,
-    required this.currentPageNumber,
-    required this.config,
-  });
-
-  @override
-  Widget build(BuildContext context) {
-    return Row(
-      mainAxisAlignment: MainAxisAlignment.center,
-      crossAxisAlignment: CrossAxisAlignment.center,
-      spacing: 0,
-      children: [
-        Expanded(
-          child: Stack(
-            children: [
-              PdfPageView(
-                key: ValueKey(currentPageNumber),
-                document: document,
-                pageNumber: currentPageNumber,
-                maximumDpi: 300,
-                alignment: config.twoPageMode && numPages >= 2
-                    ? Alignment.centerRight
-                    : Alignment.center,
-              ),
-              Positioned.fill(
-                child: Container(
-                  alignment: Alignment.bottomCenter,
-                  padding: EdgeInsets.only(bottom: 5),
-                  child: Text('$currentPageNumber / $numPages'),
-                ),
-              ),
-            ],
-          ),
-        ),
-        Visibility(
-          visible: config.twoPageMode == true && numPages >= 2,
-          child: Expanded(
-            child: Stack(
-              children: [
-                PdfPageView(
-                  key: ValueKey(currentPageNumber + 1),
-                  document: document,
-                  pageNumber: currentPageNumber + 1,
-                  maximumDpi: 300,
-                  alignment: Alignment.centerLeft,
-                  // alignment: Alignment.center,
-                ),
-                Positioned.fill(
-                  child: Container(
-                    alignment: Alignment.bottomCenter,
-                    padding: EdgeInsets.only(bottom: 5),
-                    child: Text('${currentPageNumber + 1} / $numPages'),
-                  ),
-                ),
-              ],
-            ),
-          ),
-        ),
-      ],
-    );
-  }
-
-  (Size, Size?) calcPageSizesScaled(Size parentSize) {
-    if (config.twoPageMode) {
-      Size leftPageSizeUnscaled = _getPageSizeUnscaled(currentPageNumber);
-      Size rightPageSizeUnscaled;
-      if (numPages > currentPageNumber) {
-        rightPageSizeUnscaled = _getPageSizeUnscaled(currentPageNumber + 1);
-      } else {
-        rightPageSizeUnscaled = leftPageSizeUnscaled;
-      }
-      Size combinedPageSizesUnscaled = Size(
-        leftPageSizeUnscaled.width + rightPageSizeUnscaled.width,
-        max(leftPageSizeUnscaled.height, rightPageSizeUnscaled.height),
-      );
-      Size combinedPageSizesScaled = _calcScaledPageSize(
-        parentSize,
-        combinedPageSizesUnscaled,
-      );
-      double scaleFactor =
-          combinedPageSizesScaled.width / combinedPageSizesUnscaled.width;
-      return (
-        leftPageSizeUnscaled * scaleFactor,
-        rightPageSizeUnscaled * scaleFactor,
-      );
-    } else {
-      return (
-        _calcScaledPageSize(
-          parentSize,
-          _getPageSizeUnscaled(currentPageNumber),
-        ),
-        null,
-      );
-    }
-  }
-
-  Size _getPageSizeUnscaled(int pageNumber) {
-    return document.pages.elementAt(pageNumber - 1).size;
-  }
-
-  Size _calcScaledPageSize(Size parentSize, Size pageSize) {
-    // page restricted by height
-    if (parentSize.aspectRatio > pageSize.aspectRatio) {
-      final height = parentSize.height;
-      final width = height * pageSize.aspectRatio;
-      return Size(width, height);
-    }
-    // page restricted by width
-    else {
-      final width = parentSize.width;
-      final height = width / pageSize.aspectRatio;
-      return Size(width, height);
-    }
-  }
-}

lib/storage_helper.dart

@@ -1,84 +0,0 @@
-import 'package:flutter_secure_storage/flutter_secure_storage.dart';
-import 'package:hive/hive.dart';
-import 'package:sheetless/upload_queue.dart';
-
-enum SecureStorageKey { url, jwt, email }
-
-enum ConfigKey { twoPageMode }
-
-class Config {
-  Config({required this.twoPageMode, required this.fullscreen});
-
-  static const String keyTwoPageMode = "twoPageMode";
-  static const String keyFullscreen = "fullscreen";
-
-  bool twoPageMode;
-  bool fullscreen;
-}
-
-class StorageHelper {
-  final sheetAccessTimesBox = "sheetAccessTimes";
-  final configBox = "config";
-  final changeQueueBox = "changeQueue";
-
-  late FlutterSecureStorage secureStorage;
-
-  StorageHelper() {
-    AndroidOptions getAndroidOptions() =>
-        const AndroidOptions(encryptedSharedPreferences: true);
-    secureStorage = FlutterSecureStorage(aOptions: getAndroidOptions());
-  }
-
-  Future<String?> readSecure(SecureStorageKey key) {
-    return secureStorage.read(key: key.name);
-  }
-
-  Future<void> writeSecure(SecureStorageKey key, String? value) {
-    return secureStorage.write(key: key.name, value: value);
-  }
-
-  Future<Config> readConfig() async {
-    final box = await Hive.openBox(configBox);
-    return Config(
-      twoPageMode: box.get(Config.keyTwoPageMode) ?? false,
-      fullscreen: box.get(Config.keyFullscreen) ?? false,
-    );
-  }
-
-  Future<void> writeConfig(Config config) async {
-    final box = await Hive.openBox(configBox);
-    box.put(Config.keyTwoPageMode, config.twoPageMode);
-    box.put(Config.keyFullscreen, config.fullscreen);
-  }
-
-  Future<Map<String, DateTime>> readSheetAccessTimes() async {
-    final box = await Hive.openBox(sheetAccessTimesBox);
-    return box.toMap().map(
-      (k, v) => MapEntry(k as String, DateTime.parse(v as String)),
-    );
-  }
-
-  Future<void> writeSheetAccessTime(String uuid, DateTime datetime) async {
-    final box = await Hive.openBox(sheetAccessTimesBox);
-    await box.put(uuid, datetime.toIso8601String());
-  }
-
-  Future<void> writeChange(Change change) async {
-    final box = await Hive.openBox(changeQueueBox);
-    box.add(change.toMap());
-  }
-
-  Future<ChangeQueue> readChangeQueue() async {
-    final box = await Hive.openBox(changeQueueBox);
-    ChangeQueue queue = ChangeQueue();
-    for (Map<dynamic, dynamic> map in box.values) {
-      queue.addChange(Change.fromMap(map));
-    }
-    return queue;
-  }
-
-  Future<void> deleteOldestChange(Change change) async {
-    final box = await Hive.openBox(changeQueueBox);
-    box.deleteAt(0);
-  }
-}

lib/upload_queue.dart

@@ -1,66 +0,0 @@
-import 'dart:collection';
-
-import 'package:sheetless/sheet.dart';
-
-enum ChangeType {
-  sheetNameChange,
-  composerNameChange,
-  addTagChange,
-  removeTagChange,
-}
-
-class Change {
-  final ChangeType type;
-  final String sheetUuid;
-  final String value;
-
-  Change({required this.type, required this.sheetUuid, required this.value});
-
-  Map<String, dynamic> toMap() => {
-    "type": type.index,
-    "sheetUuid": sheetUuid,
-    "value": value,
-  };
-
-  factory Change.fromMap(Map<dynamic, dynamic> map) {
-    return Change(
-      type: ChangeType
-          .values[map["type"]], // TODO: this will create problems if new enums are added
-      sheetUuid: map["sheetUuid"],
-      value: map["value"],
-    );
-  }
-}
-
-class ChangeQueue {
-  // Queue with oldest change first
-  final Queue<Change> queue = Queue();
-
-  ChangeQueue() {}
-
-  void addChange(Change change) {
-    queue.addLast(change);
-  }
-
-  int length() {
-    return queue.length;
-  }
-
-  void applyToSheets(List<Sheet> sheets) {
-    for (Change change in queue) {
-      var sheet = sheets.where((sheet) => sheet.uuid == change.sheetUuid).first;
-      switch (change.type) {
-        case ChangeType.sheetNameChange:
-          sheet.name = change.value;
-        case ChangeType.composerNameChange:
-          sheet.composerName = change.value;
-        case ChangeType.addTagChange:
-          // TODO: Handle this case.
-          throw UnimplementedError();
-        case ChangeType.removeTagChange:
-          // TODO: Handle this case.
-          throw UnimplementedError();
-      }
-    }
-  }
-}

linux/flutter/generated_plugins.cmake

@@ -10,7 +10,7 @@ list(APPEND FLUTTER_PLUGIN_LIST
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST
-  pdfrx
+  pdfium_flutter
 )
 
 set(PLUGIN_BUNDLED_LIBRARIES)

local.properties

@@ -1,3 +1,3 @@
 # This file was automatically generated by nix-shell.
-sdk.dir=/nix/store/0sbpck94abij5q1hcq1jzps3lr68p1dq-androidsdk/libexec/android-sdk
+sdk.dir=/nix/store/ri84qrj5wk61x6cja29cfcv5x0iarhs5-androidsdk/libexec/android-sdk
-ndk.dir=/nix/store/0sbpck94abij5q1hcq1jzps3lr68p1dq-androidsdk/libexec/android-sdk/ndk-bundle
+ndk.dir=/nix/store/ri84qrj5wk61x6cja29cfcv5x0iarhs5-androidsdk/libexec/android-sdk/ndk-bundle

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -5,18 +5,16 @@
 import FlutterMacOS
 import Foundation
 
-import flutter_secure_storage_macos
+import flutter_secure_storage_darwin
 import package_info_plus
-import path_provider_foundation
 import screen_retriever_macos
 import sqflite_darwin
 import url_launcher_macos
 import window_manager
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
-  FlutterSecureStoragePlugin.register(with: registry.registrar(forPlugin: "FlutterSecureStoragePlugin"))
+  FlutterSecureStorageDarwinPlugin.register(with: registry.registrar(forPlugin: "FlutterSecureStorageDarwinPlugin"))
   FPPPackageInfoPlusPlugin.register(with: registry.registrar(forPlugin: "FPPPackageInfoPlusPlugin"))
-  PathProviderPlugin.register(with: registry.registrar(forPlugin: "PathProviderPlugin"))
   ScreenRetrieverMacosPlugin.register(with: registry.registrar(forPlugin: "ScreenRetrieverMacosPlugin"))
   SqflitePlugin.register(with: registry.registrar(forPlugin: "SqflitePlugin"))
   UrlLauncherPlugin.register(with: registry.registrar(forPlugin: "UrlLauncherPlugin"))

pubspec.lock

@@ -65,6 +65,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.2"
+  code_assets:
+    dependency: transitive
+    description:
+      name: code_assets
+      sha256: "83ccdaa064c980b5596c35dd64a8d3ecc68620174ab9b90b6343b753aa721687"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
   collection:
     dependency: transitive
     description:
@@ -77,10 +85,10 @@ packages:
     dependency: transitive
     description:
       name: crypto
-      sha256: "1e445881f28f22d6140f181e07737b22f1e099a5e1ff94b0af2f9e4a463f4855"
+      sha256: c8ea0233063ba03258fbcf2ca4d6dadfefe14f02fab57702265467a19f27fadf
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.6"
+    version: "3.0.7"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -89,14 +97,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.8"
-  dart_pubspec_licenses:
-    dependency: transitive
-    description:
-      name: dart_pubspec_licenses
-      sha256: "23ddb78ff9204d08e3109ced67cd3c6c6a066f581b0edf5ee092fc3e1127f4ea"
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.0.4"
   fake_async:
     dependency: transitive
     description:
@@ -109,10 +109,10 @@ packages:
     dependency: transitive
     description:
       name: ffi
-      sha256: "289279317b4b16eb2bb7e271abccd4bf84ec9bdcbe999e278a94b804f5630418"
+      sha256: d07d37192dbf97461359c1518788f203b0c9102cfd2c35a716b823741219542c
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.4"
+    version: "2.1.5"
   file:
     dependency: transitive
     description:
@@ -142,14 +142,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.4.1"
-  flutter_drawing_board:
-    dependency: "direct main"
-    description:
-      name: flutter_drawing_board
-      sha256: b7eef8c506a12485853e8b4cdc110d1d307993279b588f3a35902a7d7082dbd4
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.9.8"
   flutter_fullscreen:
     dependency: "direct main"
     description:
@@ -178,50 +170,50 @@ packages:
     dependency: "direct main"
     description:
       name: flutter_secure_storage
-      sha256: "9cad52d75ebc511adfae3d447d5d13da15a55a92c9410e50f67335b6d21d16ea"
+      sha256: da922f2aab2d733db7e011a6bcc4a825b844892d4edd6df83ff156b09a9b2e40
       url: "https://pub.dev"
     source: hosted
-    version: "9.2.4"
+    version: "10.0.0"
+  flutter_secure_storage_darwin:
+    dependency: transitive
+    description:
+      name: flutter_secure_storage_darwin
+      sha256: "8878c25136a79def1668c75985e8e193d9d7d095453ec28730da0315dc69aee3"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
   flutter_secure_storage_linux:
     dependency: transitive
     description:
       name: flutter_secure_storage_linux
-      sha256: be76c1d24a97d0b98f8b54bce6b481a380a6590df992d0098f868ad54dc8f688
+      sha256: "2b5c76dce569ab752d55a1cee6a2242bcc11fdba927078fb88c503f150767cda"
       url: "https://pub.dev"
     source: hosted
-    version: "1.2.3"
+    version: "3.0.0"
-  flutter_secure_storage_macos:
-    dependency: transitive
-    description:
-      name: flutter_secure_storage_macos
-      sha256: "6c0a2795a2d1de26ae202a0d78527d163f4acbb11cde4c75c670f3a0fc064247"
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.1.3"
   flutter_secure_storage_platform_interface:
     dependency: transitive
     description:
       name: flutter_secure_storage_platform_interface
-      sha256: cf91ad32ce5adef6fba4d736a542baca9daf3beac4db2d04be350b87f69ac4a8
+      sha256: "8ceea1223bee3c6ac1a22dabd8feefc550e4729b3675de4b5900f55afcb435d6"
       url: "https://pub.dev"
     source: hosted
-    version: "1.1.2"
+    version: "2.0.1"
   flutter_secure_storage_web:
     dependency: transitive
     description:
       name: flutter_secure_storage_web
-      sha256: f4ebff989b4f07b2656fb16b47852c0aab9fed9b4ec1c70103368337bc1886a9
+      sha256: "6a1137df62b84b54261dca582c1c09ea72f4f9a4b2fcee21b025964132d5d0c3"
       url: "https://pub.dev"
     source: hosted
-    version: "1.2.1"
+    version: "2.1.0"
   flutter_secure_storage_windows:
     dependency: transitive
     description:
       name: flutter_secure_storage_windows
-      sha256: b20b07cb5ed4ed74fc567b78a72936203f587eba460af1df11281c9326cd3709
+      sha256: "3b7c8e068875dfd46719ff57c90d8c459c87f2302ed6b00ff006b3c9fcad1613"
       url: "https://pub.dev"
     source: hosted
-    version: "3.1.2"
+    version: "4.1.0"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -232,6 +224,14 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      sha256: c3f1ee72c96f8f78935e18aa8cecced9ab132419e8625dc187e1c2408efc20de
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.3"
   hive:
     dependency: "direct main"
     description:
@@ -240,14 +240,22 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.2.3"
+  hooks:
+    dependency: transitive
+    description:
+      name: hooks
+      sha256: "7a08a0d684cb3b8fb604b78455d5d352f502b68079f7b80b831c62220ab0a4f6"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.1"
   http:
     dependency: "direct main"
     description:
       name: http
-      sha256: "2c11f3f94c687ee9bad77c171151672986360b2b001d109814ee7140b2cf261b"
+      sha256: "87721a4a50b19c7f1d49001e51409bddc46303966ce89a65af4f4e6004896412"
       url: "https://pub.dev"
     source: hosted
-    version: "1.4.0"
+    version: "1.6.0"
   http_parser:
     dependency: transitive
     description:
@@ -260,26 +268,18 @@ packages:
     dependency: transitive
     description:
       name: image
-      sha256: "4e973fcf4caae1a4be2fa0a13157aa38a8f9cb049db6529aa00b4d71abc4d928"
+      sha256: "492bd52f6c4fbb6ee41f781ff27765ce5f627910e1e0cbecfa3d9add5562604c"
       url: "https://pub.dev"
     source: hosted
-    version: "4.5.4"
+    version: "4.7.2"
-  js:
-    dependency: transitive
-    description:
-      name: js
-      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.6.7"
   json_annotation:
     dependency: transitive
     description:
       name: json_annotation
-      sha256: "1ce844379ca14835a50d2f019a3099f419082cfdd231cd86a142af94dd5c6bb1"
+      sha256: "805fa86df56383000f640384b282ce0cb8431f1a7a2396de92fb66186d8c57df"
       url: "https://pub.dev"
     source: hosted
-    version: "4.9.0"
+    version: "4.10.0"
   jwt_decoder:
     dependency: "direct main"
     description:
@@ -292,34 +292,34 @@ packages:
     dependency: transitive
     description:
       name: leak_tracker
-      sha256: "6bb818ecbdffe216e81182c2f0714a2e62b593f4a4f13098713ff1685dfb6ab0"
+      sha256: "33e2e26bdd85a0112ec15400c8cbffea70d0f9c3407491f672a2fad47915e2de"
       url: "https://pub.dev"
     source: hosted
-    version: "10.0.9"
+    version: "11.0.2"
   leak_tracker_flutter_testing:
     dependency: transitive
     description:
       name: leak_tracker_flutter_testing
-      sha256: f8b613e7e6a13ec79cfdc0e97638fddb3ab848452eff057653abd3edba760573
+      sha256: "1dbc140bb5a23c75ea9c4811222756104fbcd1a27173f0c34ca01e16bea473c1"
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.9"
+    version: "3.0.10"
   leak_tracker_testing:
     dependency: transitive
     description:
       name: leak_tracker_testing
-      sha256: "6ba465d5d76e67ddf503e1161d1f4a6bc42306f9d66ca1e8f079a47290fb06d3"
+      sha256: "8d5a2d49f4a66b49744b23b018848400d23e54caf9463f4eb20df3eb8acb2eb1"
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.1"
+    version: "3.0.2"
   lints:
     dependency: transitive
     description:
       name: lints
-      sha256: a5e2b223cb7c9c8efdc663ef484fdd95bb243bff242ef5b13e26883547fce9a0
+      sha256: "12f842a479589fea194fe5c5a3095abc7be0c1f2ddfa9a0e76aed1dbd26a87df"
       url: "https://pub.dev"
     source: hosted
-    version: "6.0.0"
+    version: "6.1.0"
   logging:
     dependency: "direct main"
     description:
@@ -348,10 +348,26 @@ packages:
     dependency: transitive
     description:
       name: meta
-      sha256: e3641ec5d63ebf0d9b41bd43201a66e3fc79a65db5f61fc181f04cd27aab950c
+      sha256: "23f08335362185a5ea2ad3a4e597f1375e78bce8a040df5c600c8d3552ef2394"
       url: "https://pub.dev"
     source: hosted
-    version: "1.16.0"
+    version: "1.17.0"
+  native_toolchain_c:
+    dependency: transitive
+    description:
+      name: native_toolchain_c
+      sha256: "89e83885ba09da5fdf2cdacc8002a712ca238c28b7f717910b34bcd27b0d03ac"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.17.4"
+  objective_c:
+    dependency: transitive
+    description:
+      name: objective_c
+      sha256: "100a1c87616ab6ed41ec263b083c0ef3261ee6cd1dc3b0f35f8ddfa4f996fe52"
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.3.0"
   package_info_plus:
     dependency: "direct main"
     description:
@@ -388,18 +404,18 @@ packages:
     dependency: transitive
     description:
       name: path_provider_android
-      sha256: d0d310befe2c8ab9e7f393288ccbb11b60c019c6b5afc21973eeee4dda2b35e9
+      sha256: f2c65e21139ce2c3dad46922be8272bb5963516045659e71bb16e151c93b580e
       url: "https://pub.dev"
     source: hosted
-    version: "2.2.17"
+    version: "2.2.22"
   path_provider_foundation:
     dependency: transitive
     description:
       name: path_provider_foundation
-      sha256: "4843174df4d288f5e29185bd6e72a6fbdf5a4a4602717eed565497429f179942"
+      sha256: "2a376b7d6392d80cd3705782d2caa734ca4727776db0b6ec36ef3f1855197699"
       url: "https://pub.dev"
     source: hosted
-    version: "2.4.1"
+    version: "2.6.0"
   path_provider_linux:
     dependency: transitive
     description:
@@ -424,22 +440,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.3.0"
+  pdfium_dart:
+    dependency: transitive
+    description:
+      name: pdfium_dart
+      sha256: f1683b9070ddc5c9189c6ee008c285791da66328ce1b882c7162d3393f3a4a74
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.3"
+  pdfium_flutter:
+    dependency: transitive
+    description:
+      name: pdfium_flutter
+      sha256: "0c8b7d5d11d20a1486eade599648e907067568955bd14a1b06de076a968b60a1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.9"
   pdfrx:
     dependency: "direct main"
     description:
       name: pdfrx
-      sha256: a88e7797623d3b89d4a863f583c973c681f39aa48eadceb4aa61c0c99cc7fa19
+      sha256: e32e0c786528eec2b3c56b43f59ef1debce3a27c7accd862b95413f949afcfa9
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.3"
+    version: "2.2.24"
   pdfrx_engine:
     dependency: transitive
     description:
       name: pdfrx_engine
-      sha256: "69a2448ca87d0536fe4eb78fbe753fb2fb2f8ae3a1b73e2fd1937585e717c2b1"
+      sha256: a8914433d1f6188b903c53d36b9d7dc908bfa89131591a9db22f1a22470d3a48
       url: "https://pub.dev"
     source: hosted
-    version: "0.1.12"
+    version: "0.3.9"
   permission_handler:
     dependency: "direct main"
     description:
@@ -492,10 +524,10 @@ packages:
     dependency: transitive
     description:
       name: petitparser
-      sha256: "07c8f0b1913bcde1ff0d26e57ace2f3012ccbf2b204e070290dad3bb22797646"
+      sha256: "1a97266a94f7350d30ae522c0af07890c70b8e62c71e8e3920d1db4d23c057d1"
       url: "https://pub.dev"
     source: hosted
-    version: "6.1.0"
+    version: "7.0.1"
   platform:
     dependency: transitive
     description:
@@ -520,6 +552,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.0.3"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      sha256: "5bfcf68ca79ef689f8990d1160781b4bad40a3bd5e5218ad4076ddb7f4081585"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
   rxdart:
     dependency: transitive
     description:
@@ -577,18 +617,10 @@ packages:
     dependency: transitive
     description:
       name: source_span
-      sha256: "254ee5351d6cb365c859e20ee823c3bb479bf4a293c22d17a9f1bf144ce86f7c"
+      sha256: "56a02f1f4cd1a2d96303c0144c93bd6d909eea6bee6bf5a0e0b685edbd4c47ab"
       url: "https://pub.dev"
     source: hosted
-    version: "1.10.1"
+    version: "1.10.2"
-  sprintf:
-    dependency: transitive
-    description:
-      name: sprintf
-      sha256: "1fc9ffe69d4df602376b52949af107d8f5703b77cda567c4d7d86a0693120f23"
-      url: "https://pub.dev"
-    source: hosted
-    version: "7.0.0"
   sqflite:
     dependency: transitive
     description:
@@ -601,10 +633,10 @@ packages:
     dependency: transitive
     description:
       name: sqflite_android
-      sha256: "2b3070c5fa881839f8b402ee4a39c1b4d561704d4ebbbcfb808a119bc2a1701b"
+      sha256: ecd684501ebc2ae9a83536e8b15731642b9570dc8623e0073d227d0ee2bfea88
       url: "https://pub.dev"
     source: hosted
-    version: "2.4.1"
+    version: "2.4.2+2"
   sqflite_common:
     dependency: transitive
     description:
@@ -673,10 +705,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: fb31f383e2ee25fbbfe06b40fe21e1e458d14080e3c67e7ba0acfde4df4e0bbd
+      sha256: ab2726c1a94d3176a45960b6234466ec367179b87dd74f1611adb1f3b5fb9d55
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.4"
+    version: "0.7.7"
   typed_data:
     dependency: transitive
     description:
@@ -697,34 +729,34 @@ packages:
     dependency: transitive
     description:
       name: url_launcher_android
-      sha256: "8582d7f6fe14d2652b4c45c9b6c14c0b678c2af2d083a11b604caeba51930d79"
+      sha256: "767344bf3063897b5cf0db830e94f904528e6dd50a6dfaf839f0abf509009611"
       url: "https://pub.dev"
     source: hosted
-    version: "6.3.16"
+    version: "6.3.28"
   url_launcher_ios:
     dependency: transitive
     description:
       name: url_launcher_ios
-      sha256: "7f2022359d4c099eea7df3fdf739f7d3d3b9faf3166fb1dd390775176e0b76cb"
+      sha256: cfde38aa257dae62ffe79c87fab20165dfdf6988c1d31b58ebf59b9106062aad
       url: "https://pub.dev"
     source: hosted
-    version: "6.3.3"
+    version: "6.3.6"
   url_launcher_linux:
     dependency: transitive
     description:
       name: url_launcher_linux
-      sha256: "4e9ba368772369e3e08f231d2301b4ef72b9ff87c31192ef471b380ef29a4935"
+      sha256: d5e14138b3bc193a0f63c10a53c94b91d399df0512b1f29b94a043db7482384a
       url: "https://pub.dev"
     source: hosted
-    version: "3.2.1"
+    version: "3.2.2"
   url_launcher_macos:
     dependency: transitive
     description:
       name: url_launcher_macos
-      sha256: "17ba2000b847f334f16626a574c702b196723af2a289e7a93ffcb79acff855c2"
+      sha256: "368adf46f71ad3c21b8f06614adb38346f193f3a59ba8fe9a2fd74133070ba18"
       url: "https://pub.dev"
     source: hosted
-    version: "3.2.2"
+    version: "3.2.5"
   url_launcher_platform_interface:
     dependency: transitive
     description:
@@ -737,42 +769,42 @@ packages:
     dependency: transitive
     description:
       name: url_launcher_web
-      sha256: "4bd2b7b4dc4d4d0b94e5babfffbca8eac1a126c7f3d6ecbc1a11013faa3abba2"
+      sha256: d0412fcf4c6b31ecfdb7762359b7206ffba3bbffd396c6d9f9c4616ece476c1f
       url: "https://pub.dev"
     source: hosted
-    version: "2.4.1"
+    version: "2.4.2"
   url_launcher_windows:
     dependency: transitive
     description:
       name: url_launcher_windows
-      sha256: "3284b6d2ac454cf34f114e1d3319866fdd1e19cdc329999057e44ffe936cfa77"
+      sha256: "712c70ab1b99744ff066053cbe3e80c73332b38d46e5e945c98689b2e66fc15f"
       url: "https://pub.dev"
     source: hosted
-    version: "3.1.4"
+    version: "3.1.5"
   uuid:
     dependency: transitive
     description:
       name: uuid
-      sha256: a5be9ef6618a7ac1e964353ef476418026db906c4facdedaa299b7a2e71690ff
+      sha256: a11b666489b1954e01d992f3d601b1804a33937b5a8fe677bd26b8a9f96f96e8
       url: "https://pub.dev"
     source: hosted
-    version: "4.5.1"
+    version: "4.5.2"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
-      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
+      sha256: d530bd74fea330e6e364cda7a85019c434070188383e1cd8d9777ee586914c5b
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.4"
+    version: "2.2.0"
   vm_service:
     dependency: transitive
     description:
       name: vm_service
-      sha256: ddfa8d30d89985b96407efce8acbdd124701f96741f2d981ca860662f1c0dc02
+      sha256: "45caa6c5917fa127b5dbcfbd1fa60b14e583afdc08bfc96dda38886ca252eb60"
       url: "https://pub.dev"
     source: hosted
-    version: "15.0.0"
+    version: "15.0.2"
   web:
     dependency: transitive
     description:
@@ -785,10 +817,10 @@ packages:
     dependency: transitive
     description:
       name: win32
-      sha256: "66814138c3562338d05613a6e368ed8cfb237ad6d64a9e9334be3f309acfca03"
+      sha256: d7cb55e04cd34096cd3a79b3330245f54cb96a370a1c27adb3c84b917de8b08e
       url: "https://pub.dev"
     source: hosted
-    version: "5.14.0"
+    version: "5.15.0"
   window_manager:
     dependency: transitive
     description:
@@ -809,10 +841,10 @@ packages:
     dependency: transitive
     description:
       name: xml
-      sha256: b015a8ad1c488f66851d762d3090a21c600e479dc75e68328c52774040cf9226
+      sha256: "971043b3a0d3da28727e40ed3e0b5d18b742fa5a68665cca88e74b7876d5e025"
       url: "https://pub.dev"
     source: hosted
-    version: "6.5.0"
+    version: "6.6.1"
   yaml:
     dependency: transitive
     description:
@@ -822,5 +854,5 @@ packages:
     source: hosted
     version: "3.1.3"
 sdks:
-  dart: ">=3.8.1 <4.0.0"
+  dart: ">=3.10.3 <4.0.0"
-  flutter: ">=3.29.0"
+  flutter: ">=3.38.4"

pubspec.yaml

@@ -16,7 +16,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 0.1.2
+version: 0.2.0
 
 environment:
   sdk: ^3.0.0
@@ -41,11 +41,10 @@ dependencies:
   http: ^1.2.2
   path_provider: ^2.1.5
   flutter_cache_manager: ^3.4.1
-  flutter_secure_storage: ^9.2.2
+  flutter_secure_storage: ^10.0.0
   jwt_decoder: ^2.0.1
   pdfrx: ^2.0.4
   logging: ^1.3.0
-  flutter_drawing_board: ^0.9.8
   flutter_launcher_icons: ^0.14.4
   hive: ^2.2.3
   flutter_fullscreen: ^1.2.0

test/widget_test.dart

@@ -7,13 +7,12 @@
 
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
-
+import 'package:sheetless/app.dart';
-import 'package:sheetless/main.dart';
 
 void main() {
   testWidgets('Counter increments smoke test', (WidgetTester tester) async {
     // Build our app and trigger a frame.
-    await tester.pumpWidget(const MyApp());
+    await tester.pumpWidget(const SheetlessApp());
 
     // Verify that our counter starts at 0.
     expect(find.text('0'), findsOneWidget);

windows/flutter/generated_plugins.cmake

@@ -11,7 +11,7 @@ list(APPEND FLUTTER_PLUGIN_LIST
 )
 
 list(APPEND FLUTTER_FFI_PLUGIN_LIST
-  pdfrx
+  pdfium_flutter
 )
 
 set(PLUGIN_BUNDLED_LIBRARIES)