Team Color, image compression for attendance verification, improved wherebouts

lib/services/background_location_service.dart

@@ -54,12 +54,14 @@ void callbackDispatcher() {
 
 /// Initialize Workmanager and register periodic background location task.
 Future<void> initBackgroundLocationService() async {
+  if (kIsWeb) return; // Workmanager is not supported on web.
   await Workmanager().initialize(callbackDispatcher);
 }
 
 /// Register a periodic task to report location every ~15 minutes
 /// (Android minimum for periodic Workmanager tasks).
 Future<void> startBackgroundLocationUpdates() async {
+  if (kIsWeb) return; // Workmanager is not supported on web.
   await Workmanager().registerPeriodicTask(
     _taskName,
     _taskName,
@@ -71,5 +73,6 @@ Future<void> startBackgroundLocationUpdates() async {
 
 /// Cancel the periodic background location task.
 Future<void> stopBackgroundLocationUpdates() async {
+  if (kIsWeb) return; // Workmanager is not supported on web.
   await Workmanager().cancelByUniqueName(_taskName);
 }

lib/services/image_compress_service.dart

@@ -0,0 +1,33 @@
+import 'dart:typed_data';
+
+import 'package:flutter_image_compress/flutter_image_compress.dart';
+
+/// Compresses a JPEG image to reduce upload size.
+///
+/// Target: ≤ 200 KB for verification selfies. Falls back to the original
+/// bytes if compression fails so the upload is never blocked.
+class ImageCompressService {
+  ImageCompressService._();
+
+  /// Compress [bytes] (JPEG/PNG) down to [quality] (1–100).
+  /// Resizes the longest side to at most [maxDimension] pixels.
+  static Future<Uint8List> compress(
+    Uint8List bytes, {
+    int quality = 70,
+    int maxDimension = 800,
+  }) async {
+    try {
+      final result = await FlutterImageCompress.compressWithList(
+        bytes,
+        minHeight: maxDimension,
+        minWidth: maxDimension,
+        quality: quality,
+        format: CompressFormat.jpeg,
+      );
+      return result;
+    } catch (_) {
+      // If compression fails on any platform, return original bytes.
+      return bytes;
+    }
+  }
+}