Fix lint errors by converting relative imports to package imports

Replace all relative imports (../) with package imports (package:flutter_flatseal/) to comply with the always_use_package_imports lint rule. This fixes the failing CI analyze job.

Files updated:
- lib/main.dart
- lib/screens/home_screen.dart
- lib/services/flatpak_service.dart
- lib/widgets/app_list.dart
- lib/widgets/permission_details.dart
- lib/widgets/permission_group.dart

Co-authored-by: jwinarske <[email protected]>

Author: Copilot

lib/main.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
-import 'screens/home_screen.dart';
-import 'services/flatpak_service.dart';
+import 'package:flutter_flatseal/screens/home_screen.dart';
+import 'package:flutter_flatseal/services/flatpak_service.dart';
 
 void main() {
   runApp(const FlatsealApp());

lib/screens/home_screen.dart

@@ -1,8 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
-import '../services/flatpak_service.dart';
-import '../widgets/app_list.dart';
-import '../widgets/permission_details.dart';
+import 'package:flutter_flatseal/services/flatpak_service.dart';
+import 'package:flutter_flatseal/widgets/app_list.dart';
+import 'package:flutter_flatseal/widgets/permission_details.dart';
 
 class HomeScreen extends StatefulWidget {
   const HomeScreen({super.key});

lib/services/flatpak_service.dart

@@ -1,7 +1,7 @@
 import 'dart:io';
 import 'package:flutter/foundation.dart';
-import '../models/flatpak_app.dart';
-import '../models/permission.dart';
+import 'package:flutter_flatseal/models/flatpak_app.dart';
+import 'package:flutter_flatseal/models/permission.dart';
 
 /// Service to interact with Flatpak command-line tools
 class FlatpakService extends ChangeNotifier {

lib/widgets/app_list.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
-import '../models/flatpak_app.dart';
-import '../services/flatpak_service.dart';
+import 'package:flutter_flatseal/models/flatpak_app.dart';
+import 'package:flutter_flatseal/services/flatpak_service.dart';
 
 class AppList extends StatefulWidget {
   final List<FlatpakApp> apps;

lib/widgets/permission_details.dart

@@ -1,9 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
-import '../models/flatpak_app.dart';
-import '../models/permission.dart';
-import '../services/flatpak_service.dart';
-import 'permission_group.dart';
+import 'package:flutter_flatseal/models/flatpak_app.dart';
+import 'package:flutter_flatseal/models/permission.dart';
+import 'package:flutter_flatseal/services/flatpak_service.dart';
+import 'package:flutter_flatseal/widgets/permission_group.dart';
 
 class PermissionDetails extends StatelessWidget {
   final FlatpakApp app;

lib/widgets/permission_group.dart

@@ -1,8 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
-import '../models/flatpak_app.dart';
-import '../models/permission.dart';
-import '../services/flatpak_service.dart';
+import 'package:flutter_flatseal/models/flatpak_app.dart';
+import 'package:flutter_flatseal/models/permission.dart';
+import 'package:flutter_flatseal/services/flatpak_service.dart';
 
 class PermissionGroup extends StatelessWidget {
   final String title;