Add logging, await token callback and widget refresh

Fixes async token handling and improves observability: await the callback in KretaClient to ensure proper async flow, add informative logs for token expiry/refresh and warn on empty 200/201 API responses. Enhance token refresh flow in token_grant with detailed info/warning/severe logs and exception logging for easier debugging. Update widget DB helper to force fresh fetches for timetables/grades when updating widget cache, avoid writing empty caches and add debug prints for counts and cache status. Wire widget refresh into LiveActivityService background fetch (with import and try/catch logging) so iOS widgets get refreshed during background processing.

firka/lib/helpers/api/client/kreta_client.dart

@@ -66,7 +66,7 @@ class KretaClient {
     }
     _tokenMutex = true;
     try {
-      return callback();
+      return await callback();
     } finally {
       _tokenMutex = false;
     }
@@ -78,7 +78,7 @@ class KretaClient {
 
       if (now.millisecondsSinceEpoch >=
           model.expiryDate!.millisecondsSinceEpoch) {
-        logger.finest("Token expired, refreshing: $model");
+        logger.info("Token expired at ${model.expiryDate}, refreshing for user: ${model.studentId}");
         var extended = await extendToken(model);
         var tokenModel = TokenModel.fromResp(extended);
 
@@ -86,7 +86,7 @@ class KretaClient {
           await isar.tokenModels.put(tokenModel);
         });
 
-        logger.finest("Token refreshed and saved: $model");
+        logger.info("Token refreshed successfully. New expiry: ${tokenModel.expiryDate}");
 
         model = tokenModel;
       }
@@ -116,6 +116,15 @@ class KretaClient {
       if (!url.endsWith("TanuloAdatlap")) {
         logger.finest("Response: ${resp.statusCode} ${resp.data}");
       }
+
+      if (resp.statusCode == 200 || resp.statusCode == 201) {
+        final responseData = resp.data;
+        if (responseData == null ||
+            (responseData is List && responseData.isEmpty) ||
+            (responseData is Map && responseData.isEmpty)) {
+          logger.warning("API returned ${resp.statusCode} with empty data for: $url - possible stale session");
+        }
+      }
     } catch (ex) {
       if (ex is Error) {
         logger.shout(

firka/lib/helpers/api/token_grant.dart

@@ -41,6 +41,8 @@ Future<TokenGrantResponse> getAccessToken(String code) async {
 }
 
 Future<TokenGrantResponse> extendToken(TokenModel model) async {
+  logger.info("Extending token for user: ${model.studentId}, institute: ${model.iss}");
+
   final headers = <String, String>{
     "content-type": "application/x-www-form-urlencoded; charset=UTF-8",
     "accept": "*/*",
@@ -60,16 +62,21 @@ Future<TokenGrantResponse> extendToken(TokenModel model) async {
 
     switch (response.statusCode) {
       case 200:
+        logger.info("Token extended successfully for user: ${model.studentId}");
         return TokenGrantResponse.fromJson(response.data);
       case 400:
+        logger.warning("Token refresh failed (400) - refresh token expired for user: ${model.studentId}");
         throw TokenExpiredException();
       case 401:
+        logger.warning("Token refresh failed (401) - invalid grant for user: ${model.studentId}");
         throw InvalidGrantException();
       default:
+        logger.severe("Token refresh failed with unexpected status: ${response.statusCode} for user: ${model.studentId}");
         throw Exception(
             "Failed to get access token, response code: ${response.statusCode}");
     }
   } catch (e) {
+    logger.severe("Token refresh exception for user: ${model.studentId}: $e");
     rethrow;
   }
 }

firka/lib/helpers/db/widget.dart

@@ -64,13 +64,16 @@ class WidgetCacheHelper {
 
     final start = now.subtract(Duration(days: 7));
     final end = now.add(Duration(days: 14));
-    final lessons = await client.getTimeTable(start, end);
+    final lessons = await client.getTimeTable(start, end, forceCache: false);
 
     final widgetFile = File(p.join(dataDir.path, "widget_state.json"));
 
     if (lessons.response != null) {
+      debugPrint('Android widget cache: ${lessons.response!.length} lessons (cached: ${lessons.cached})');
       widgetFile.writeAsString(
           jsonEncode(WidgetCacheHelper.toJson(style, lessons.response!)));
+    } else {
+      debugPrint('Android widget cache: No lessons to cache');
     }
   }
 
@@ -137,7 +140,6 @@ class WidgetCacheHelper {
           theme = isLightMode.value ? 'light' : 'dark';
       }
 
-      // Get today's and tomorrow's lessons
       final now = timeNow();
       final todayMidnight = DateTime(now.year, now.month, now.day);
       final tomorrowMidnight = todayMidnight.add(Duration(days: 1));
@@ -145,19 +147,24 @@ class WidgetCacheHelper {
       final todayResponse = await client.getTimeTable(
         todayMidnight,
         todayMidnight.add(Duration(hours: 23, minutes: 59)),
+        forceCache: false,
       );
       final tomorrowResponse = await client.getTimeTable(
         tomorrowMidnight,
         tomorrowMidnight.add(Duration(hours: 23, minutes: 59)),
+        forceCache: false,
       );
 
       final todayLessons = todayResponse.response ?? [];
       final tomorrowLessons = tomorrowResponse.response ?? [];
 
-      // Get grades
-      final gradesResponse = await client.getGrades();
+      debugPrint('iOS widget refresh: ${todayLessons.length} today lessons, ${tomorrowLessons.length} tomorrow lessons');
+
+      final gradesResponse = await client.getGrades(forceCache: false);
       final grades = gradesResponse.response ?? [];
 
+      debugPrint('iOS widget refresh: ${grades.length} grades fetched (cached: ${gradesResponse.cached})');
+
       // Calculate subject averages
       final Map<String, double> subjectAverages = {};
       final Set<String> subjectUids = {};

firka/lib/helpers/live_activity_service.dart

@@ -5,6 +5,7 @@ import 'package:firka/helpers/api/client/live_activity_backend_client.dart';
 import 'package:firka/helpers/api/model/generic.dart';
 import 'package:firka/helpers/api/model/timetable.dart';
 import 'package:firka/helpers/db/models/app_settings_model.dart';
+import 'package:firka/helpers/db/widget.dart';
 import 'package:firka/helpers/live_activity_manager.dart';
 import 'package:firka/helpers/settings.dart';
 import 'package:firka/ui/phone/screens/live_activity/live_activity_consent_screen.dart';
@@ -443,6 +444,14 @@ class LiveActivityService {
         }
       }
 
+      try {
+        _logger.info('Background fetch: refreshing iOS widgets...');
+        await WidgetCacheHelper.refreshIOSWidgets(client, initData.settings);
+        _logger.info('Background fetch: iOS widgets refreshed successfully');
+      } catch (e) {
+        _logger.warning('Background fetch: failed to refresh iOS widgets: $e');
+      }
+
       bool foundFirstSchoolDay = false;
       for (int dayOffset = 1; dayOffset <= 5; dayOffset++) {
         final candidateDay = endOfWeek.add(Duration(days: dayOffset));