No need update check for web

lib/models/app_version.dart

@@ -2,13 +2,14 @@
 /// `AppUpdateService` fetches the most recent entry and compares it against the
 /// running application's build number.
 class AppVersion {
-  /// Incrementing integer that matches the Android `versionCode`.
-  final int versionCode;
+  /// Version string, e.g. `1.2.3` or `2026.03.12`.  Stored as text in
+  /// the database so semantic versions are allowed.
+  final String versionCode;
 
   /// If the device is running a build number that is *strictly less* than this
   /// value the update is considered "forced" and the user cannot continue
-  /// using the existing install.
-  final int minVersionRequired;
+  /// using the existing install.  Also a string.
+  final String minVersionRequired;
 
   /// A publicly‑accessible URL pointing at an APK stored in Supabase Storage.
   final String downloadUrl;
@@ -25,8 +26,8 @@ class AppVersion {
 
   factory AppVersion.fromMap(Map<String, dynamic> map) {
     return AppVersion(
-      versionCode: map['version_code'] as int,
-      minVersionRequired: map['min_version_required'] as int,
+      versionCode: map['version_code']?.toString() ?? '',
+      minVersionRequired: map['min_version_required']?.toString() ?? '',
       downloadUrl: map['download_url'] as String,
       releaseNotes: map['release_notes'] as String? ?? '',
     );
@@ -40,8 +41,9 @@ class AppUpdateInfo {
   /// table was empty (should not happen in normal operation).
   final AppVersion? latestVersion;
 
-  /// Current build number as reported by ``package_info_plus``.
-  final int currentBuildNumber;
+  /// Current build number / version string.  May be empty on non-Android
+  /// platforms since checkForUpdate is skipped there.
+  final String currentBuildNumber;
 
   /// ``true`` when ``currentBuildNumber < latestVersion.versionCode``.
   final bool isUpdateAvailable;