simplified code across the app and consolidated duplicated helpers

lib/widget_data/widget_sync.dart

@@ -53,13 +53,21 @@ class WidgetSync {
   static Future<void> writeWeekData(WidgetTimetableData data) =>
       _writeData(weekDataKey, data);
 
+  /// Writes a complete snapshot and marks the widget signed in, then asks the
+  /// native side to re-render.
+  static Future<void> publishSnapshot({
+    required WidgetTimetableData day,
+    required WidgetTimetableData week,
+  }) async {
+    await writeDayData(day);
+    await writeWeekData(week);
+    await setLoggedIn(true);
+    await triggerUpdate();
+  }
+
   static Future<void> _writeData(String key, WidgetTimetableData data) async {
-    await ensureInitialized();
-    await HomeWidget.saveWidgetData<String>(key, jsonEncode(data.toJson()));
-    await HomeWidget.saveWidgetData<String>(
-      fetchedAtKey,
-      data.fetchedAt.toIso8601String(),
-    );
+    await _setString(key, jsonEncode(data.toJson()));
+    await _setString(fetchedAtKey, data.fetchedAt.toIso8601String());
   }
 
   static Future<void> setLoggedIn(bool loggedIn) =>
@@ -88,27 +96,30 @@ class WidgetSync {
     return await HomeWidget.getWidgetData<bool>(key) ?? defaultValue;
   }
 
-  static Future<void> setThemeMode(String mode) async {
-    await ensureInitialized();
-    await HomeWidget.saveWidgetData<String>(themeModeKey, mode);
-  }
+  static Future<void> setThemeMode(String mode) =>
+      _setString(themeModeKey, mode);
 
-  static Future<void> setMarianumConnectBaseUrl(String url) async {
-    await ensureInitialized();
-    await HomeWidget.saveWidgetData<String>(marianumConnectBaseUrlKey, url);
-  }
+  static Future<void> setMarianumConnectBaseUrl(String url) =>
+      _setString(marianumConnectBaseUrlKey, url);
 
-  static Future<String?> getMarianumConnectBaseUrl() async {
-    await ensureInitialized();
-    return HomeWidget.getWidgetData<String>(marianumConnectBaseUrlKey);
-  }
+  static Future<String?> getMarianumConnectBaseUrl() =>
+      _getString(marianumConnectBaseUrlKey);
 
   static Future<DateTime?> getFetchedAt() async {
-    await ensureInitialized();
-    final raw = await HomeWidget.getWidgetData<String>(fetchedAtKey);
+    final raw = await _getString(fetchedAtKey);
     return raw == null ? null : DateTime.tryParse(raw);
   }
 
+  static Future<void> _setString(String key, String? value) async {
+    await ensureInitialized();
+    await HomeWidget.saveWidgetData<String>(key, value);
+  }
+
+  static Future<String?> _getString(String key) async {
+    await ensureInitialized();
+    return HomeWidget.getWidgetData<String>(key);
+  }
+
   static Future<void> clear() async {
     WidgetPublisher.resetDedupe();
     await ensureInitialized();