No need update check for web

lib/services/app_update_service.dart

@@ -3,6 +3,7 @@ import 'dart:io';
 
 import 'package:ota_update/ota_update.dart';
 import 'package:package_info_plus/package_info_plus.dart';
+import 'package:pub_semver/pub_semver.dart';
 import 'package:permission_handler/permission_handler.dart';
 import 'package:supabase_flutter/supabase_flutter.dart';
 
@@ -48,26 +49,48 @@ class AppUpdateService {
   /// (network down, no supabase instance) are simply re‑thrown; the caller can
   /// decide whether to ignore them or surface them to the user.
   Future<AppUpdateInfo> checkForUpdate() async {
-    final pkg = await PackageInfo.fromPlatform();
-    final currentBuild = int.tryParse(pkg.buildNumber) ?? 0;
-
-    final serverVersion = await _fetchLatestVersion();
-
-    if (serverVersion == null) {
-      // table empty – nothing to do
+    // only run on Android devices; web and other platforms skip
+    if (!Platform.isAndroid) {
       return AppUpdateInfo(
-        currentBuildNumber: currentBuild,
+        currentBuildNumber: '',
         latestVersion: null,
         isUpdateAvailable: false,
         isForceUpdate: false,
       );
     }
 
-    final available = currentBuild < serverVersion.versionCode;
-    final force = currentBuild < serverVersion.minVersionRequired;
+    final pkg = await PackageInfo.fromPlatform();
+    final currentVersion = pkg.buildNumber.trim();
+
+    final serverVersion = await _fetchLatestVersion();
+
+    if (serverVersion == null) {
+      return AppUpdateInfo(
+        currentBuildNumber: currentVersion,
+        latestVersion: null,
+        isUpdateAvailable: false,
+        isForceUpdate: false,
+      );
+    }
+
+    // compare using semantic versioning where possible
+    Version safeParse(String s) {
+      try {
+        return Version.parse(s);
+      } catch (_) {
+        return Version(0, 0, 0);
+      }
+    }
+
+    final vCurrent = safeParse(currentVersion);
+    final vLatest = safeParse(serverVersion.versionCode);
+    final vMin = safeParse(serverVersion.minVersionRequired);
+
+    final available = vCurrent < vLatest;
+    final force = vCurrent < vMin;
 
     return AppUpdateInfo(
-      currentBuildNumber: currentBuild,
+      currentBuildNumber: currentVersion,
       latestVersion: serverVersion,
       isUpdateAvailable: available,
       isForceUpdate: force,