implemented RMV commute integration in the timetable, added Nominatim geocoding for home station lookup, created CommuteCubit for daily trip management with TTL caching, and introduced specialized timetable tiles, detail sheets, and settings for transit connections and walking buffers

Reviewed-on: #100

.gitignore

@@ -48,14 +48,14 @@ lib/generated_plugin_registrant.dart
 #pubspec.lock
 
 # Android related
-**/android/**/gradle-wrapper.jar
-**/android/.gradle
-**/android/captures/
-**/android/gradlew
-**/android/gradlew.bat
-**/android/key.properties
-**/android/local.properties
-**/android/**/GeneratedPluginRegistrant.java
+materials/screenshots/android/**/gradle-wrapper.jar
+materials/screenshots/android/.gradle
+materials/screenshots/android/captures/
+materials/screenshots/android/gradlew
+materials/screenshots/android/gradlew.bat
+materials/screenshots/android/key.properties
+materials/screenshots/android/local.properties
+materials/screenshots/android/**/GeneratedPluginRegistrant.java
 
 # iOS/XCode related
 **/ios/**/*.mode1v3

CLAUDE.md

@@ -0,0 +1,77 @@
+# MarianumMobile Client
+
+Flutter-App für die Schul-Community: Webuntis-Stundenplan, Nextcloud Talk + Files, Custom MHSL-Backend (Breaker, Custom Events, Push).
+
+## Stack
+
+- **Flutter** (Dart >= 3.8)
+- **State:** `flutter_bloc` + `hydrated_bloc` (persistente BLoCs pro Modul)
+- **Navigation:** `persistent_bottom_nav_bar_v2` mit zentraler `AppRoutes`-Klasse als Single Entry Point
+- **HTTP:** `dio`, lokales Caching via `localstore` (Generic `RequestCache<T>`)
+- **Calendar:** `syncfusion_flutter_calendar`
+- **Datum/Zeit:** `jiffy` – wird **nur** über die Extensions in `lib/extensions/date_time.dart` verwendet
+- **Code-Gen:** `freezed`, `json_serializable`
+
+## Ordnerstruktur
+
+```
+lib/
+├── api/                    HTTP-Layer pro Backend (mhsl/, marianumcloud/, webuntis/, holidays/)
+├── state/app/modules/      BLoC pro Feature-Modul (timetable, chat, chat_list, files, ...)
+├── state/app/infrastructure LoadableState<T>, DataLoader, geteilte BLoC-Bausteine
+├── view/                   Screens
+│   ├── login/              Login-Flow
+│   └── pages/              ein Verzeichnis pro Modul (timetable, files, talk, ...)
+├── widget/                 Geteilte UI-Komponenten (Dialoge, Buttons, Sheets)
+├── extensions/             DateTime-, Text-, TimeOfDay-Extensions
+├── routing/                AppRoutes (Single Navigation Entry)
+├── theming/                Light/Dark Theme
+├── storage/                Freezed Settings-Modelle (HydratedBloc-persistent)
+├── notification/           Firebase + flutter_local_notifications
+└── utils/                  Helper (clipboard_helper, debouncer, download_manager, ...)
+```
+
+## Konventionen
+
+**Navigation:** Ausschließlich über `AppRoutes.openX(context, ...)`. Direkte `Navigator.push(...)` für volle Pages sind nicht erlaubt – `Navigator.pop` für Sheets/Dialogs bleibt am Call-Site.
+
+**Dialoge:**
+- Info/Fehler: `InfoDialog.show(context, body, copyable: true, title: '...')` aus `lib/widget/info_dialog.dart`.
+- Bestätigung: `ConfirmDialog(...).asDialog(context)` aus `lib/widget/confirm_dialog.dart`. Async-Bestätigung nutzt `onConfirmAsync` (zeigt Spinner und Inline-Fehler über `AsyncDialogAction`).
+- **Kein** inline `AlertDialog`/`SimpleDialog` mehr.
+
+**Bottom-Sheets:** Detail-Sheets gehen über `showDetailsBottomSheet(context, header: ..., children: (ctx) => [...])` aus `lib/widget/details_bottom_sheet.dart`. Header ist optional.
+
+**Async-Actions:** Statt manuelles Spinner+Try/Catch die `AsyncActionButton`-Familie aus `lib/widget/async_action_button.dart` (`AsyncActionButton`, `AsyncTextButton`, `AsyncIconButton`, `AsyncFab`, `AsyncListTile`, `AsyncDialogAction`, `runWithErrorDialog`). Fehler-Mapping läuft über `errorBuilder` oder zentral über `errorToUserMessage` aus `lib/api/errors/error_mapper.dart`.
+
+**Clipboard:** Über `copyToClipboard(context, text)` aus `lib/utils/clipboard_helper.dart`. Zeigt automatisch SnackBar.
+
+**Datum/Zeit-Formatierung:** Über die Extensions in `lib/extensions/date_time.dart`:
+`dt.formatHm()`, `dt.formatDate()`, `dt.formatDateTime()`, `dt.formatDateShort()`, `dt.formatRelative()`, `start.timeRangeTo(end)`. **Kein** direktes `Jiffy.parseFromDateTime(...).format(pattern: '...')` im View-Code.
+
+**Settings:** Pro Feature ein Freezed-Modell unter `lib/storage/`, persistiert via HydratedBloc.
+
+## Build / Run
+
+```bash
+flutter pub get
+dart run build_runner build --delete-conflicting-outputs   # nach Änderungen an Freezed/JSON-Modellen
+flutter run                                                  # Debug auf angeschlossenem Device
+flutter analyze                                              # statische Analyse, muss 0 Issues melden
+flutter test                                                 # Tests (siehe test/)
+```
+
+## Backend-Integrationen
+
+| Backend                   | Pfad                  | Zweck                                  |
+|---------------------------|-----------------------|----------------------------------------|
+| Webuntis                  | `lib/api/webuntis/`   | Stundenplan, Klassen, Räume, Lehrer    |
+| Nextcloud (Talk + WebDAV) | `lib/api/marianumcloud/` | Chats, Datei-Verwaltung             |
+| Custom MHSL-Server        | `lib/api/mhsl/`       | Breaker, Custom Events, Notify, Noten  |
+| Holiday-Calendar          | `lib/api/holidays/`   | Ferien                                 |
+
+`nextcloud`-Paket ist auf einen Custom-Fork gepinnt (siehe `pubspec.yaml` `dependency_overrides`).
+
+## Tests
+
+`test/` deckt aktuell nur Kern-Funktionen ab (DateTime-Extensions, AsyncActionController, LessonResolver). Beim Hinzufügen neuer pure-function-Helper bitte Test mit dazu.

analysis_options.yaml

@@ -1,44 +1,88 @@
-# This file configures the analyzer, which statically analyzes Dart code to
-# check for errors, warnings, and lints.
+# Static analysis configuration for the Flutter project.
+# https://dart.dev/guides/language/analysis-options
 #
-# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
-# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
-# invoked from the command line by running `flutter analyze`.
+# Base ruleset: flutter_lints (recommended Flutter defaults).
+# Additional lints below catch real bugs and enforce consistent style.
 
-# The following line activates a set of recommended lints for Flutter apps,
-# packages, and plugins designed to encourage good coding practices.
 include: package:flutter_lints/flutter.yaml
 
 analyzer:
+  language:
+    strict-casts: true
+    strict-raw-types: true
   errors:
     invalid_annotation_target: ignore
+    todo: ignore
+  exclude:
+    - "**/*.g.dart"
+    - "**/*.freezed.dart"
+    - "lib/firebase_options.dart"
+    - "build/**"
 
 linter:
-  # The lint rules applied to this project can be customized in the
-  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
-  # included above or to enable additional rules. A list of all available lints
-  # and their documentation is published at
-  # https://dart-lang.github.io/linter/lints/index.html.
-  #
-  # Instead of disabling a lint rule for the entire project in the
-  # section below, it can also be suppressed for a single line of code
-  # or a specific dart file by using the `// ignore: name_of_lint` and
-  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
-  # producing the lint.
   rules:
-    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
-    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
-    file_names: false
+    # === Project conventions ===
     prefer_relative_imports: true
-    unnecessary_lambdas: true
     prefer_single_quotes: true
-    prefer_if_elements_to_conditional_expressions: true
-    prefer_expression_function_bodies: true
-    omit_local_variable_types: true
     eol_at_end_of_file: true
-    cast_nullable_to_non_nullable: true
-    avoid_void_async: true
+    omit_local_variable_types: true
     avoid_multiple_declarations_per_line: true
 
-# Additional information about this file can be found at
-# https://dart.dev/guides/language/analysis-options
+    # === Bug catchers ===
+    always_declare_return_types: true
+    avoid_empty_else: true
+    avoid_slow_async_io: true
+    avoid_type_to_string: true
+    avoid_void_async: true
+    await_only_futures: true
+    cancel_subscriptions: true
+    cast_nullable_to_non_nullable: true
+    close_sinks: true
+    empty_catches: true
+    hash_and_equals: true
+    no_adjacent_strings_in_list: true
+    no_duplicate_case_values: true
+    test_types_in_equals: true
+    throw_in_finally: true
+    unawaited_futures: true
+    unnecessary_statements: true
+    unrelated_type_equality_checks: true
+    use_build_context_synchronously: true
+    valid_regexps: true
+
+    # === Flutter widget hygiene ===
+    avoid_unnecessary_containers: true
+    sized_box_for_whitespace: true
+    sort_child_properties_last: true
+    use_colored_box: true
+    use_decorated_box: true
+    use_full_hex_values_for_flutter_colors: true
+    use_key_in_widget_constructors: true
+
+    # === Code clarity ===
+    directives_ordering: true
+    library_prefixes: true
+    no_leading_underscores_for_local_identifiers: true
+    prefer_conditional_assignment: true
+    prefer_if_elements_to_conditional_expressions: true
+    prefer_if_null_operators: true
+    prefer_initializing_formals: true
+    prefer_interpolation_to_compose_strings: true
+    prefer_is_empty: true
+    prefer_is_not_empty: true
+    prefer_is_not_operator: true
+    prefer_iterable_whereType: true
+    prefer_null_aware_operators: true
+    prefer_spread_collections: true
+    prefer_void_to_null: true
+    unnecessary_await_in_return: true
+    unnecessary_brace_in_string_interps: true
+    unnecessary_lambdas: true
+    unnecessary_null_aware_assignments: true
+    unnecessary_null_checks: true
+    unnecessary_parenthesis: true
+    unnecessary_string_interpolations: true
+    use_super_parameters: true
+
+    # === File naming ===
+    file_names: true

android/app/build.gradle

@@ -25,15 +25,16 @@ if (flutterVersionName == null) {
 android {
     namespace "eu.mhsl.marianum.mobile.client"
     compileSdk flutter.compileSdkVersion
-    ndkVersion flutter.ndkVersion
+    ndkVersion "28.2.13676358"
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
+        coreLibraryDesugaringEnabled true
     }
 
     kotlinOptions {
-        jvmTarget = '1.8'
+        jvmTarget = '17'
     }
 
     sourceSets {
@@ -41,11 +42,8 @@ android {
     }
 
     defaultConfig {
-        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "eu.mhsl.marianum.mobile.client"
-        // You can update the following values to match your application needs.
-        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
-        minSdkVersion 21
+        minSdkVersion 26
         targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
@@ -66,5 +64,6 @@ flutter {
 }
 
 dependencies {
-    implementation 'com.android.support:multidex:1.0.3'
+    implementation 'com.android.support:multidex:2.0.1'
+    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:2.1.4'
 }

android/app/src/main/AndroidManifest.xml

@@ -2,7 +2,10 @@
     <application
         android:label="Marianum Fulda"
         android:name="${applicationName}"
-        android:icon="@mipmap/ic_launcher">
+        android:icon="@mipmap/ic_launcher"
+        android:fullBackupContent="@xml/backup_rules"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:networkSecurityConfig="@xml/network_security_config">
         <activity
             android:name=".MainActivity"
             android:exported="true"
@@ -23,23 +26,88 @@
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.SEND" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:mimeType="image/*" />
+                <data android:mimeType="video/*" />
+                <data android:mimeType="application/*" />
+                <data android:mimeType="text/*" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.SEND_MULTIPLE" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:mimeType="image/*" />
+                <data android:mimeType="video/*" />
+                <data android:mimeType="application/*" />
+            </intent-filter>
         </activity>
         <!-- Don't delete the meta-data below.
              This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
-    </application>
-    <!-- Required to query activities that can process text, see:
-         https://developer.android.com/training/package-visibility?hl=en and
-         https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.
 
-         In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
+        <!-- Receiver classes live at the package root (NOT under .widgets) because
+             the home_widget Flutter plugin resolves them as <app-package>.<name>. -->
+        <receiver
+            android:name="eu.mhsl.marianum.mobile.client.TimetableDayWidget"
+            android:label="@string/widget_day_label"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+            </intent-filter>
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/timetable_day_widget_info" />
+        </receiver>
+
+        <receiver
+            android:name="eu.mhsl.marianum.mobile.client.TimetableWeekWidget"
+            android:label="@string/widget_week_label"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+            </intent-filter>
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/timetable_week_widget_info" />
+        </receiver>
+    </application>
+    <!-- Required so url_launcher / can_launch can actually see browsers,
+         mail clients and dialers under Android 11+ package-visibility rules
+         (otherwise UrlLauncher logs "component name for ... is null" and
+         link taps in Talk silently do nothing). The PROCESS_TEXT intent is
+         needed by io.flutter.plugin.text.ProcessTextPlugin (selection
+         menu).
+         See https://developer.android.com/training/package-visibility -->
     <queries>
         <intent>
             <action android:name="android.intent.action.PROCESS_TEXT"/>
             <data android:mimeType="text/plain"/>
         </intent>
+        <intent>
+            <action android:name="android.intent.action.VIEW"/>
+            <data android:scheme="https"/>
+        </intent>
+        <intent>
+            <action android:name="android.intent.action.VIEW"/>
+            <data android:scheme="http"/>
+        </intent>
+        <intent>
+            <action android:name="android.intent.action.VIEW"/>
+            <data android:scheme="mailto"/>
+        </intent>
+        <intent>
+            <action android:name="android.intent.action.VIEW"/>
+            <data android:scheme="tel"/>
+        </intent>
     </queries>
     <uses-permission android:name="android.permission.INTERNET"/>
+    <!-- Workmanager periodic widget refresh needs to reschedule after device
+         reboot, otherwise the widget freezes until the user opens the app. -->
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
+    <!-- RMV "in meiner Nähe"-Suche. Coarse reicht (RMV-Suchradius >= 500 m). -->
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
 </manifest>

android/app/src/main/kotlin/eu/mhsl/marianum/mobile/client/MainActivity.kt

@@ -1,5 +1,42 @@
 package eu.mhsl.marianum.mobile.client
 
+import android.content.Intent
 import io.flutter.embedding.android.FlutterActivity
+import io.flutter.embedding.engine.FlutterEngine
+import io.flutter.plugin.common.MethodChannel
 
-class MainActivity: FlutterActivity()
+class MainActivity : FlutterActivity() {
+    private val widgetChannel = "eu.mhsl.marianum.widget"
+    /// Last seen widget tap target. Cleared by Dart via `consumePendingNavigation`
+    /// so the same intent isn't replayed on every resume.
+    private var pendingTimetableTap: Boolean = false
+
+    override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
+        super.configureFlutterEngine(flutterEngine)
+        MethodChannel(
+            flutterEngine.dartExecutor.binaryMessenger,
+            widgetChannel
+        ).setMethodCallHandler { call, result ->
+            when (call.method) {
+                "consumePendingNavigation" -> {
+                    val pending = pendingTimetableTap
+                    pendingTimetableTap = false
+                    result.success(pending)
+                }
+                else -> result.notImplemented()
+            }
+        }
+        consumeIntentData(intent)
+    }
+
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+        consumeIntentData(intent)
+    }
+
+    private fun consumeIntentData(intent: Intent?) {
+        if (intent?.getBooleanExtra("widget_open_timetable", false) == true) {
+            pendingTimetableTap = true
+        }
+    }
+}

android/app/src/main/kotlin/eu/mhsl/marianum/mobile/client/TimetableDayWidget.kt

@@ -0,0 +1,37 @@
+package eu.mhsl.marianum.mobile.client
+
+import android.appwidget.AppWidgetManager
+import android.appwidget.AppWidgetProvider
+import android.content.Context
+import android.os.Bundle
+import eu.mhsl.marianum.mobile.client.widgets.WidgetRenderer
+
+/**
+ * Lives at the package root (not under `widgets/`) because the home_widget
+ * Flutter plugin resolves the receiver class as `<app-package>.<androidName>`.
+ */
+class TimetableDayWidget : AppWidgetProvider() {
+    override fun onUpdate(
+        context: Context,
+        appWidgetManager: AppWidgetManager,
+        appWidgetIds: IntArray,
+    ) {
+        for (id in appWidgetIds) {
+            val options = appWidgetManager.getAppWidgetOptions(id)
+            val views = WidgetRenderer.buildDay(context, context.packageName, options)
+            appWidgetManager.updateAppWidget(id, views)
+        }
+    }
+
+    override fun onAppWidgetOptionsChanged(
+        context: Context,
+        appWidgetManager: AppWidgetManager,
+        appWidgetId: Int,
+        newOptions: Bundle,
+    ) {
+        // Re-render on resize, otherwise the tiles stay at install-time size
+        // and either clip or leave dead space.
+        val views = WidgetRenderer.buildDay(context, context.packageName, newOptions)
+        appWidgetManager.updateAppWidget(appWidgetId, views)
+    }
+}

android/app/src/main/kotlin/eu/mhsl/marianum/mobile/client/TimetableWeekWidget.kt

@@ -0,0 +1,31 @@
+package eu.mhsl.marianum.mobile.client
+
+import android.appwidget.AppWidgetManager
+import android.appwidget.AppWidgetProvider
+import android.content.Context
+import android.os.Bundle
+import eu.mhsl.marianum.mobile.client.widgets.WidgetRenderer
+
+class TimetableWeekWidget : AppWidgetProvider() {
+    override fun onUpdate(
+        context: Context,
+        appWidgetManager: AppWidgetManager,
+        appWidgetIds: IntArray,
+    ) {
+        for (id in appWidgetIds) {
+            val options = appWidgetManager.getAppWidgetOptions(id)
+            val views = WidgetRenderer.buildWeek(context, context.packageName, options)
+            appWidgetManager.updateAppWidget(id, views)
+        }
+    }
+
+    override fun onAppWidgetOptionsChanged(
+        context: Context,
+        appWidgetManager: AppWidgetManager,
+        appWidgetId: Int,
+        newOptions: Bundle,
+    ) {
+        val views = WidgetRenderer.buildWeek(context, context.packageName, newOptions)
+        appWidgetManager.updateAppWidget(appWidgetId, views)
+    }
+}

android/app/src/main/kotlin/eu/mhsl/marianum/mobile/client/widgets/WidgetData.kt

@@ -0,0 +1,157 @@
+package eu.mhsl.marianum.mobile.client.widgets
+
+import org.json.JSONException
+import org.json.JSONObject
+import java.text.SimpleDateFormat
+import java.util.Calendar
+import java.util.Date
+import java.util.Locale
+import java.util.TimeZone
+
+// Mirror of lib/widget_data/widget_data.dart — JSON keys + enum names
+// must stay in sync.
+enum class WidgetLessonStatus {
+    REGULAR, ONGOING, PAST, CANCELLED, IRREGULAR, TEACHER_CHANGED, EVENT;
+
+    companion object {
+        fun fromWire(raw: String?): WidgetLessonStatus = when (raw) {
+            "regular" -> REGULAR
+            "ongoing" -> ONGOING
+            "past" -> PAST
+            "cancelled" -> CANCELLED
+            "irregular" -> IRREGULAR
+            "teacherChanged" -> TEACHER_CHANGED
+            "event" -> EVENT
+            else -> REGULAR
+        }
+    }
+}
+
+data class WidgetLesson(
+    val start: Date,
+    val end: Date,
+    val subjectShort: String,
+    val subjectLong: String?,
+    val room: String?,
+    val teacher: String?,
+    val originalTeacher: String?,
+    val status: WidgetLessonStatus,
+    val customColor: String?,
+    val siblingCount: Int,
+)
+
+data class WidgetPeriod(
+    val name: String,
+    val startMinutes: Int,
+    val endMinutes: Int,
+    val virtualStartMinutes: Int,
+    val virtualEndMinutes: Int,
+)
+
+data class WidgetTimetableData(
+    val fetchedAt: Date,
+    val anchorDate: Date,
+    val lessons: List<WidgetLesson>,
+    val periods: List<WidgetPeriod>,
+    val isHoliday: Boolean,
+    val holidayName: String?,
+)
+
+object WidgetDataParser {
+    private val isoFormat: SimpleDateFormat
+        get() = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS", Locale.ROOT).apply {
+            timeZone = TimeZone.getDefault()
+        }
+
+    /// Dart's toIso8601String() ships microseconds (6 digits) when non-zero;
+    /// SimpleDateFormat only parses 3 → strip the extra digits. Local time
+    /// without Z is the default, so removeSuffix("Z") makes the parser
+    /// tolerate both shapes.
+    private fun parseDate(raw: String?): Date? {
+        if (raw.isNullOrEmpty()) return null
+        val cleaned = raw
+            .replace(Regex("([.,]\\d{3})\\d+"), "$1")
+            .removeSuffix("Z")
+        return try {
+            isoFormat.parse(cleaned)
+        } catch (_: Exception) {
+            null
+        }
+    }
+
+    fun parse(json: String?): WidgetTimetableData? {
+        if (json.isNullOrEmpty()) return null
+        return try {
+            val root = JSONObject(json)
+            val lessonsArray = root.optJSONArray("lessons")
+            val lessons = mutableListOf<WidgetLesson>()
+            if (lessonsArray != null) {
+                for (i in 0 until lessonsArray.length()) {
+                    val obj = lessonsArray.optJSONObject(i) ?: continue
+                    val start = parseDate(obj.stringOrNull("start")) ?: continue
+                    val end = parseDate(obj.stringOrNull("end")) ?: continue
+                    lessons += WidgetLesson(
+                        start = start,
+                        end = end,
+                        subjectShort = obj.stringOrNull("subjectShort") ?: "",
+                        subjectLong = obj.stringOrNull("subjectLong"),
+                        room = obj.stringOrNull("room"),
+                        teacher = obj.stringOrNull("teacher"),
+                        originalTeacher = obj.stringOrNull("originalTeacher"),
+                        status = WidgetLessonStatus.fromWire(obj.stringOrNull("status")),
+                        customColor = obj.stringOrNull("customColor"),
+                        siblingCount = obj.optInt("siblingCount", 0),
+                    )
+                }
+            }
+            val periodsArray = root.optJSONArray("periods")
+            val periods = mutableListOf<WidgetPeriod>()
+            if (periodsArray != null) {
+                for (i in 0 until periodsArray.length()) {
+                    val obj = periodsArray.optJSONObject(i) ?: continue
+                    periods += WidgetPeriod(
+                        name = obj.stringOrNull("name") ?: "",
+                        startMinutes = obj.optInt("startMinutes", 0),
+                        endMinutes = obj.optInt("endMinutes", 0),
+                        virtualStartMinutes = obj.optInt("virtualStartMinutes", 0),
+                        virtualEndMinutes = obj.optInt("virtualEndMinutes", 0),
+                    )
+                }
+            }
+            WidgetTimetableData(
+                fetchedAt = parseDate(root.stringOrNull("fetchedAt")) ?: Date(),
+                anchorDate = parseDate(root.stringOrNull("anchorDate")) ?: Date(),
+                lessons = lessons,
+                periods = periods,
+                isHoliday = root.optBoolean("isHoliday", false),
+                holidayName = root.stringOrNull("holidayName"),
+            )
+        } catch (_: JSONException) {
+            null
+        }
+    }
+
+    private fun JSONObject.stringOrNull(key: String): String? {
+        if (!has(key) || isNull(key)) return null
+        val raw = optString(key, "")
+        return if (raw.isEmpty()) null else raw
+    }
+}
+
+object WidgetDateUtils {
+    fun startOfDay(date: Date): Date {
+        val cal = Calendar.getInstance().apply { time = date }
+        cal.set(Calendar.HOUR_OF_DAY, 0)
+        cal.set(Calendar.MINUTE, 0)
+        cal.set(Calendar.SECOND, 0)
+        cal.set(Calendar.MILLISECOND, 0)
+        return cal.time
+    }
+
+    fun isSameDay(a: Date, b: Date): Boolean {
+        val ca = Calendar.getInstance().apply { time = a }
+        val cb = Calendar.getInstance().apply { time = b }
+        return ca.get(Calendar.YEAR) == cb.get(Calendar.YEAR) &&
+            ca.get(Calendar.DAY_OF_YEAR) == cb.get(Calendar.DAY_OF_YEAR)
+    }
+}

android/app/src/main/kotlin/eu/mhsl/marianum/mobile/client/widgets/WidgetRenderer.kt

@@ -0,0 +1,743 @@
+package eu.mhsl.marianum.mobile.client.widgets
+
+import android.app.PendingIntent
+import android.appwidget.AppWidgetManager
+import android.content.Context
+import android.content.Intent
+import android.content.SharedPreferences
+import android.content.res.Configuration
+import android.os.Bundle
+import android.util.TypedValue
+import android.view.View
+import android.widget.RemoteViews
+import eu.mhsl.marianum.mobile.client.MainActivity
+import eu.mhsl.marianum.mobile.client.R
+import java.text.SimpleDateFormat
+import java.util.Calendar
+import java.util.Date
+import java.util.Locale
+import kotlin.math.max
+
+/**
+ * Renders the day and week widgets as a time-grid: lesson blocks absolutely
+ * positioned on a vertical axis, mirroring the in-app Syncfusion calendar.
+ * Per-hour dp is computed from the widget bundle so the grid scales with
+ * resize, clamped to [MIN_HOUR_HEIGHT_DP, MAX_HOUR_HEIGHT_DP].
+ */
+object WidgetRenderer {
+    private const val FALLBACK_VIRTUAL_MINUTES = 11 * 60
+
+    private const val DAY_CHROME_DP = 40
+    private const val WEEK_CHROME_DP = 64
+
+    private const val MIN_HOUR_HEIGHT_DP = 18
+    private const val MAX_HOUR_HEIGHT_DP = 72
+
+    private const val MIN_BLOCK_HEIGHT_DP = 16
+    private const val LESSON_GAP_DP = 1.5f
+
+    // Below SHOW_ROOM_MIN: subject only. Below SHOW_TEACHER_SEPARATE_MIN:
+    // subject + room. Above: subject + room + teacher stacked.
+    private const val BLOCK_SHOW_ROOM_MIN_DP = 18
+    private const val BLOCK_SHOW_TEACHER_SEPARATE_MIN_DP = 30
+
+    /// Below this column width autoSize can't fit subject + room — drop
+    /// room/teacher entirely on the week-widget.
+    private const val WEEK_COLUMN_TIGHT_DP = 45
+
+    private val timeFormat = SimpleDateFormat("HH:mm", Locale.GERMAN)
+    private val dateShort = SimpleDateFormat("dd.MM.", Locale.GERMAN)
+    private val weekdayShort = SimpleDateFormat("EE", Locale.GERMAN)
+    private val dateTimeShort = SimpleDateFormat("dd.MM. HH:mm", Locale.GERMAN)
+
+    /// Hex values mirror LightAppTheme / DarkAppTheme tokens so the widget
+    /// matches the app's branding rather than the generic system look.
+    private data class WidgetPalette(
+        val background: Int,
+        val textPrimary: Int,
+        val textSecondary: Int,
+        val divider: Int,
+        val breakBlock: Int,
+        val watermarkAlpha: Float,
+    )
+
+    private val lightPalette = WidgetPalette(
+        background = 0xFFFCF7F5.toInt(),
+        textPrimary = 0xFF1A1A1A.toInt(),
+        textSecondary = 0xFF555555.toInt(),
+        divider = 0x22000000,
+        breakBlock = 0x0C000000,
+        watermarkAlpha = 0.014f,
+    )
+
+    private val darkPalette = WidgetPalette(
+        background = 0xFF1F1716.toInt(),
+        textPrimary = 0xFFF1F1F1.toInt(),
+        textSecondary = 0xFFB0B0B0.toInt(),
+        divider = 0x33FFFFFF,
+        breakBlock = 0x14FFFFFF,
+        watermarkAlpha = 0.025f,
+    )
+
+    private fun resolvePalette(context: Context, themeMode: String?): WidgetPalette {
+        val isDark = when (themeMode) {
+            "light" -> false
+            "dark" -> true
+            else -> {
+                val uiMode = context.resources.configuration.uiMode and
+                    Configuration.UI_MODE_NIGHT_MASK
+                uiMode == Configuration.UI_MODE_NIGHT_YES
+            }
+        }
+        return if (isDark) darkPalette else lightPalette
+    }
+
+    fun buildDay(
+        context: Context,
+        packageName: String,
+        options: Bundle? = null,
+    ): RemoteViews {
+        val prefs = sharedPrefs(context)
+        val palette = resolvePalette(context, prefs.getString(KEY_THEME_MODE, "system"))
+        if (!prefs.getBoolean(KEY_LOGGED_IN, false)) {
+            return buildPlaceholder(
+                context,
+                packageName,
+                context.getString(R.string.widget_login_required),
+                palette,
+            )
+        }
+        val data = WidgetDataParser.parse(prefs.getString(KEY_DAY_DATA, null))
+            ?: return buildPlaceholder(
+                context,
+                packageName,
+                context.getString(R.string.widget_loading),
+                palette,
+            )
+
+        val totalVirtualMin = data.periods.lastOrNull()?.virtualEndMinutes
+            ?: FALLBACK_VIRTUAL_MINUTES
+        val hourHeightDp = resolveHourHeight(options, DAY_CHROME_DP, totalVirtualMin)
+
+        val views = RemoteViews(packageName, R.layout.widget_day)
+        applyChrome(views, palette, options)
+        views.setTextColor(R.id.widget_day_title, palette.textPrimary)
+        views.setTextColor(R.id.widget_day_subtitle, palette.textSecondary)
+        views.setTextColor(R.id.widget_day_empty, palette.textSecondary)
+        views.setTextViewText(
+            R.id.widget_day_title,
+            "${dayLabel(context, data.anchorDate)} · ${dateShort.format(data.anchorDate)}",
+        )
+        views.setTextViewText(
+            R.id.widget_day_subtitle,
+            context.getString(R.string.widget_status_label, freshnessLabel(context, data.fetchedAt)),
+        )
+
+        views.removeAllViews(R.id.widget_day_time_labels)
+        views.removeAllViews(R.id.widget_day_grid)
+
+        if (data.isHoliday) {
+            views.setViewVisibility(R.id.widget_day_empty, View.VISIBLE)
+            views.setTextViewText(
+                R.id.widget_day_empty,
+                data.holidayName ?: context.getString(R.string.widget_holiday),
+            )
+        } else if (data.lessons.isEmpty()) {
+            views.setViewVisibility(R.id.widget_day_empty, View.VISIBLE)
+            views.setTextViewText(
+                R.id.widget_day_empty,
+                context.getString(R.string.widget_no_lessons),
+            )
+        } else {
+            views.setViewVisibility(R.id.widget_day_empty, View.GONE)
+            populateGridLines(packageName, views, R.id.widget_day_time_labels, hourHeightDp, palette, data.periods)
+            populateTimeLabels(packageName, views, R.id.widget_day_time_labels, hourHeightDp, palette, data.periods)
+            populateGridLines(packageName, views, R.id.widget_day_grid, hourHeightDp, palette, data.periods)
+            populateBreakBlocks(packageName, views, R.id.widget_day_grid, hourHeightDp, palette, data.periods)
+            for (lesson in data.lessons) {
+                addLessonBlock(
+                    context = context,
+                    packageName = packageName,
+                    parent = views,
+                    containerId = R.id.widget_day_grid,
+                    lesson = lesson,
+                    hourHeightDp = hourHeightDp,
+                    periods = data.periods,
+                    subjectOnly = false,
+                    horizontalPaddingDp = 7,
+                )
+            }
+        }
+
+        views.setOnClickPendingIntent(R.id.widget_root, openAppIntent(context))
+        return views
+    }
+
+    fun buildWeek(
+        context: Context,
+        packageName: String,
+        options: Bundle? = null,
+    ): RemoteViews {
+        val prefs = sharedPrefs(context)
+        val palette = resolvePalette(context, prefs.getString(KEY_THEME_MODE, "system"))
+        if (!prefs.getBoolean(KEY_LOGGED_IN, false)) {
+            return buildPlaceholder(
+                context,
+                packageName,
+                context.getString(R.string.widget_login_required),
+                palette,
+            )
+        }
+        val data = WidgetDataParser.parse(prefs.getString(KEY_WEEK_DATA, null))
+            ?: return buildPlaceholder(
+                context,
+                packageName,
+                context.getString(R.string.widget_loading),
+                palette,
+            )
+
+        val totalVirtualMin = data.periods.lastOrNull()?.virtualEndMinutes
+            ?: FALLBACK_VIRTUAL_MINUTES
+        val hourHeightDp = resolveHourHeight(options, WEEK_CHROME_DP, totalVirtualMin)
+
+        val views = RemoteViews(packageName, R.layout.widget_week)
+        applyChrome(views, palette, options)
+        views.setTextColor(R.id.widget_week_title, palette.textPrimary)
+        views.setTextColor(R.id.widget_week_subtitle, palette.textSecondary)
+        val cal = Calendar.getInstance().apply { time = data.anchorDate }
+        val weekNumber = cal.get(Calendar.WEEK_OF_YEAR)
+        val end = Calendar.getInstance().apply {
+            time = data.anchorDate
+            add(Calendar.DAY_OF_YEAR, 4)
+        }.time
+        val kwPrefix = context.getString(R.string.widget_calendar_week_prefix)
+        views.setTextViewText(
+            R.id.widget_week_title,
+            "$kwPrefix $weekNumber · ${dateShort.format(data.anchorDate)}–${dateShort.format(end)}",
+        )
+        views.setTextViewText(
+            R.id.widget_week_subtitle,
+            context.getString(R.string.widget_status_label, freshnessLabel(context, data.fetchedAt)),
+        )
+
+        val headerIds = listOf(
+            R.id.widget_week_header_mon,
+            R.id.widget_week_header_tue,
+            R.id.widget_week_header_wed,
+            R.id.widget_week_header_thu,
+            R.id.widget_week_header_fri,
+        )
+        val columnIds = listOf(
+            R.id.widget_week_col_mon,
+            R.id.widget_week_col_tue,
+            R.id.widget_week_col_wed,
+            R.id.widget_week_col_thu,
+            R.id.widget_week_col_fri,
+        )
+        views.removeAllViews(R.id.widget_week_time_labels)
+        populateGridLines(packageName, views, R.id.widget_week_time_labels, hourHeightDp, palette, data.periods)
+        populateTimeLabels(packageName, views, R.id.widget_week_time_labels, hourHeightDp, palette, data.periods)
+
+        val (weekWidthDp, _) = widgetSizeDp(options)
+        // Time-label column is 28dp wide; the rest is split across 5 days
+        // plus thin dividers (negligible). Drop room/teacher only on the
+        // very narrowest week widgets — autoSize handles the in-between
+        // sizes.
+        val dayColumnWidthDp = (weekWidthDp - 28f - 20f) / 5f
+        val subjectOnly = dayColumnWidthDp < WEEK_COLUMN_TIGHT_DP
+
+        for ((index, columnId) in columnIds.withIndex()) {
+            views.removeAllViews(headerIds[index])
+            views.removeAllViews(columnId)
+            val day = Calendar.getInstance().apply {
+                time = data.anchorDate
+                add(Calendar.DAY_OF_YEAR, index)
+            }.time
+            val header = RemoteViews(packageName, R.layout.widget_week_day_header)
+            header.setTextColor(R.id.widget_week_day_header_weekday, palette.textPrimary)
+            header.setTextColor(R.id.widget_week_day_header_date, palette.textSecondary)
+            header.setTextViewText(R.id.widget_week_day_header_weekday, weekdayShort.format(day))
+            header.setTextViewText(R.id.widget_week_day_header_date, dateShort.format(day))
+            views.addView(headerIds[index], header)
+
+            populateGridLines(packageName, views, columnId, hourHeightDp, palette, data.periods)
+            populateBreakBlocks(packageName, views, columnId, hourHeightDp, palette, data.periods)
+            for (lesson in data.lessons.filter { WidgetDateUtils.isSameDay(it.start, day) }) {
+                addLessonBlock(
+                    context = context,
+                    packageName = packageName,
+                    parent = views,
+                    containerId = columnId,
+                    lesson = lesson,
+                    hourHeightDp = hourHeightDp,
+                    periods = data.periods,
+                    subjectOnly = subjectOnly,
+                    horizontalPaddingDp = 3,
+                )
+            }
+        }
+
+        views.setOnClickPendingIntent(R.id.widget_root, openAppIntent(context))
+        return views
+    }
+
+    /// Pulls the launcher-reported widget size out of the AppWidget options
+    /// bundle. The grid now spans `totalVirtualMin` minutes (lessons +
+    /// preserved big breaks), so we divide by that instead of a fixed hour
+    /// count to keep tiles readable across different timetables.
+    private fun resolveHourHeight(
+        options: Bundle?,
+        chromeDp: Int,
+        totalVirtualMin: Int,
+    ): Float {
+        val virtualHours = (totalVirtualMin / 60.0f).coerceAtLeast(1f)
+        val rawHeightDp = options?.let {
+            max(
+                it.getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_HEIGHT, 0),
+                it.getInt(AppWidgetManager.OPTION_APPWIDGET_MAX_HEIGHT, 0),
+            )
+        } ?: 0
+        if (rawHeightDp <= 0) return 32f
+        val gridHeightDp = (rawHeightDp - chromeDp)
+            .coerceAtLeast((MIN_HOUR_HEIGHT_DP * virtualHours).toInt())
+        return (gridHeightDp.toFloat() / virtualHours)
+            .coerceIn(MIN_HOUR_HEIGHT_DP.toFloat(), MAX_HOUR_HEIGHT_DP.toFloat())
+    }
+
+    /// Real wall-clock minute → position on the virtual axis. Inside a
+    /// period: linear. In a gap: linear across the virtual gap (zero for
+    /// squeezed small breaks, real width for big breaks).
+    private fun realMinutesToVirtual(
+        realMin: Int,
+        periods: List<WidgetPeriod>,
+    ): Float {
+        if (periods.isEmpty()) return realMin.toFloat()
+        for (period in periods) {
+            if (realMin in period.startMinutes..period.endMinutes) {
+                return period.virtualStartMinutes + (realMin - period.startMinutes).toFloat()
+            }
+        }
+        val first = periods.first()
+        if (realMin < first.startMinutes) {
+            return (realMin - first.startMinutes + first.virtualStartMinutes).toFloat()
+        }
+        val last = periods.last()
+        if (realMin > last.endMinutes) {
+            return last.virtualEndMinutes + (realMin - last.endMinutes).toFloat()
+        }
+        var prev = first
+        for (i in 1 until periods.size) {
+            val curr = periods[i]
+            if (realMin in (prev.endMinutes + 1) until curr.startMinutes) {
+                val gap = curr.startMinutes - prev.endMinutes
+                val virtualGap = curr.virtualStartMinutes - prev.virtualEndMinutes
+                return if (gap > 0) {
+                    prev.virtualEndMinutes +
+                        (realMin - prev.endMinutes).toFloat() * virtualGap / gap
+                } else {
+                    curr.virtualStartMinutes.toFloat()
+                }
+            }
+            prev = curr
+        }
+        return 0f
+    }
+
+    /// Below this per-hour height the two-line label collapses to a single
+    /// period number — time + number overlap otherwise.
+    private const val TIME_LABEL_COMPACT_THRESHOLD_DP = 26f
+
+    private fun populateTimeLabels(
+        packageName: String,
+        parent: RemoteViews,
+        containerId: Int,
+        hourHeightDp: Float,
+        palette: WidgetPalette,
+        periods: List<WidgetPeriod>,
+    ) {
+        val compact = hourHeightDp < TIME_LABEL_COMPACT_THRESHOLD_DP
+        for (period in periods) {
+            val label = RemoteViews(packageName, R.layout.widget_time_label)
+            label.setTextViewText(R.id.widget_time_label_number, "${period.name}.")
+            label.setTextViewText(R.id.widget_time_label_time, formatHm(period.startMinutes))
+            if (compact) {
+                label.setViewVisibility(R.id.widget_time_label_time, View.GONE)
+                label.setTextViewTextSize(
+                    R.id.widget_time_label_number,
+                    TypedValue.COMPLEX_UNIT_SP,
+                    9f,
+                )
+                label.setTextColor(R.id.widget_time_label_number, palette.textPrimary)
+            } else {
+                label.setViewVisibility(R.id.widget_time_label_time, View.VISIBLE)
+                label.setTextViewTextSize(
+                    R.id.widget_time_label_number,
+                    TypedValue.COMPLEX_UNIT_SP,
+                    7f,
+                )
+                label.setTextColor(R.id.widget_time_label_number, palette.textSecondary)
+            }
+            label.setTextColor(R.id.widget_time_label_time, palette.textPrimary)
+            val topDp = period.virtualStartMinutes * hourHeightDp / 60.0f
+            label.setViewLayoutMargin(
+                R.id.widget_time_label_root,
+                RemoteViews.MARGIN_TOP,
+                topDp,
+                TypedValue.COMPLEX_UNIT_DIP,
+            )
+            parent.addView(containerId, label)
+        }
+    }
+
+    private fun populateGridLines(
+        packageName: String,
+        parent: RemoteViews,
+        containerId: Int,
+        hourHeightDp: Float,
+        palette: WidgetPalette,
+        periods: List<WidgetPeriod>,
+    ) {
+        // Lines at every period start + end, deduped by virtual minute so
+        // adjacent periods share a line and big-break boundaries get both
+        // upper and lower edges.
+        val drawn = mutableSetOf<Int>()
+        for (period in periods) {
+            for (virtualMin in listOf(period.virtualStartMinutes, period.virtualEndMinutes)) {
+                if (!drawn.add(virtualMin)) continue
+                val line = RemoteViews(packageName, R.layout.widget_grid_line)
+                line.setInt(R.id.widget_grid_line_root, "setBackgroundColor", palette.divider)
+                val topDp = virtualMin * hourHeightDp / 60.0f
+                line.setViewLayoutMargin(
+                    R.id.widget_grid_line_root,
+                    RemoteViews.MARGIN_TOP,
+                    topDp,
+                    TypedValue.COMPLEX_UNIT_DIP,
+                )
+                parent.addView(containerId, line)
+            }
+        }
+    }
+
+    /// Faint translucent block in any virtual gap between two periods —
+    /// only big breaks (Hofpause, Mittagspause) survive the mapper's
+    /// small-break collapse.
+    private fun populateBreakBlocks(
+        packageName: String,
+        parent: RemoteViews,
+        containerId: Int,
+        hourHeightDp: Float,
+        palette: WidgetPalette,
+        periods: List<WidgetPeriod>,
+    ) {
+        for (i in 0 until periods.size - 1) {
+            val curr = periods[i]
+            val next = periods[i + 1]
+            val virtualGap = next.virtualStartMinutes - curr.virtualEndMinutes
+            if (virtualGap <= 0) continue
+            val block = RemoteViews(packageName, R.layout.widget_break_block)
+            val topDp = curr.virtualEndMinutes * hourHeightDp / 60.0f
+            val heightDp = virtualGap * hourHeightDp / 60.0f
+            block.setViewLayoutMargin(
+                R.id.widget_break_block_root,
+                RemoteViews.MARGIN_TOP,
+                topDp,
+                TypedValue.COMPLEX_UNIT_DIP,
+            )
+            block.setViewLayoutHeight(
+                R.id.widget_break_block_root,
+                heightDp,
+                TypedValue.COMPLEX_UNIT_DIP,
+            )
+            block.setInt(
+                R.id.widget_break_block_root,
+                "setBackgroundColor",
+                palette.breakBlock,
+            )
+            parent.addView(containerId, block)
+        }
+    }
+
+    private fun formatHm(minutesSinceMidnight: Int): String {
+        val h = minutesSinceMidnight / 60
+        val m = minutesSinceMidnight % 60
+        return "%02d:%02d".format(h, m)
+    }
+
+    /// Overrides the chrome XML's `@color/widget_*` defaults when the user
+    /// pins a fixed light/dark theme, and resizes the watermark M to match
+    /// the current widget bounds.
+    private fun applyChrome(views: RemoteViews, palette: WidgetPalette, options: Bundle?) {
+        views.setInt(R.id.widget_root, "setBackgroundColor", palette.background)
+        views.setInt(R.id.widget_watermark, "setColorFilter", palette.textPrimary)
+        views.setFloat(R.id.widget_watermark, "setAlpha", palette.watermarkAlpha)
+
+        val (widthDp, heightDp) = widgetSizeDp(options)
+        // Sized to the longer edge so the M scales with widget resize.
+        // Negative end/bottom margin lets a sliver tuck behind the edge.
+        val markSize = (max(widthDp, heightDp) * 0.8f).coerceIn(160f, 400f)
+        val offsetEnd = -(markSize * 0.18f)
+        val offsetBottom = -(markSize * 0.18f)
+        views.setViewLayoutWidth(
+            R.id.widget_watermark,
+            markSize,
+            TypedValue.COMPLEX_UNIT_DIP,
+        )
+        views.setViewLayoutHeight(
+            R.id.widget_watermark,
+            markSize,
+            TypedValue.COMPLEX_UNIT_DIP,
+        )
+        views.setViewLayoutMargin(
+            R.id.widget_watermark,
+            RemoteViews.MARGIN_END,
+            offsetEnd,
+            TypedValue.COMPLEX_UNIT_DIP,
+        )
+        views.setViewLayoutMargin(
+            R.id.widget_watermark,
+            RemoteViews.MARGIN_BOTTOM,
+            offsetBottom,
+            TypedValue.COMPLEX_UNIT_DIP,
+        )
+    }
+
+    private fun widgetSizeDp(options: Bundle?): Pair<Int, Int> {
+        if (options == null) return Pair(220, 220)
+        val width = max(
+            options.getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_WIDTH, 0),
+            options.getInt(AppWidgetManager.OPTION_APPWIDGET_MAX_WIDTH, 0),
+        ).coerceAtLeast(140)
+        val height = max(
+            options.getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_HEIGHT, 0),
+            options.getInt(AppWidgetManager.OPTION_APPWIDGET_MAX_HEIGHT, 0),
+        ).coerceAtLeast(140)
+        return Pair(width, height)
+    }
+
+    private fun addLessonBlock(
+        context: Context,
+        packageName: String,
+        parent: RemoteViews,
+        containerId: Int,
+        lesson: WidgetLesson,
+        hourHeightDp: Float,
+        periods: List<WidgetPeriod>,
+        subjectOnly: Boolean,
+        horizontalPaddingDp: Int,
+    ) {
+        val cal = Calendar.getInstance()
+        cal.time = lesson.start
+        val startMinutes = cal.get(Calendar.HOUR_OF_DAY) * 60 + cal.get(Calendar.MINUTE)
+        cal.time = lesson.end
+        val endMinutes = cal.get(Calendar.HOUR_OF_DAY) * 60 + cal.get(Calendar.MINUTE)
+        val durationMinutes = (endMinutes - startMinutes).coerceAtLeast(15)
+
+        val virtualStart = realMinutesToVirtual(startMinutes, periods)
+        val virtualEnd = realMinutesToVirtual(startMinutes + durationMinutes, periods)
+        if (virtualEnd <= virtualStart) return
+
+        // Half the gap above + half below so the grid line under the tile
+        // stays visible.
+        val topDp = virtualStart * hourHeightDp / 60.0f + LESSON_GAP_DP / 2f
+        val heightDp = ((virtualEnd - virtualStart) * hourHeightDp / 60.0f - LESSON_GAP_DP)
+            .coerceAtLeast(MIN_BLOCK_HEIGHT_DP.toFloat())
+
+        val block = RemoteViews(packageName, R.layout.widget_lesson_block)
+        block.setViewLayoutMargin(
+            R.id.widget_lesson_block_root,
+            RemoteViews.MARGIN_TOP,
+            topDp,
+            TypedValue.COMPLEX_UNIT_DIP,
+        )
+        block.setViewLayoutHeight(
+            R.id.widget_lesson_block_root,
+            heightDp,
+            TypedValue.COMPLEX_UNIT_DIP,
+        )
+        block.setInt(
+            R.id.widget_lesson_block_root,
+            "setBackgroundResource",
+            statusDrawable(lesson),
+        )
+
+        val density = context.resources.displayMetrics.density
+        val padXPx = (horizontalPaddingDp * density).toInt()
+        val padYPx = (3 * density).toInt()
+        block.setViewPadding(
+            R.id.widget_lesson_block_root,
+            padXPx, padYPx, padXPx, padYPx,
+        )
+
+        block.setTextViewText(R.id.widget_lesson_subject, subjectLabel(lesson))
+
+        // Separate fixed-size badge so the +N hint stays readable when
+        // autoSize shrinks the subject on narrow tiles.
+        if (lesson.siblingCount > 0) {
+            block.setTextViewText(
+                R.id.widget_lesson_sibling_badge,
+                "+${lesson.siblingCount}",
+            )
+            block.setViewVisibility(R.id.widget_lesson_sibling_badge, View.VISIBLE)
+        } else {
+            block.setViewVisibility(R.id.widget_lesson_sibling_badge, View.GONE)
+        }
+
+        val room = roomLabel(lesson)
+        val teacher = teacherLabel(lesson)
+        val noSecondaryContent = room.isNullOrEmpty() && teacher.isNullOrEmpty()
+        val hideSecondary = subjectOnly ||
+            heightDp < BLOCK_SHOW_ROOM_MIN_DP ||
+            noSecondaryContent
+        block.setViewVisibility(
+            R.id.widget_lesson_secondary_stack,
+            if (hideSecondary) View.GONE else View.VISIBLE,
+        )
+        // Custom-events have no room/teacher → let the subject wrap to 2 lines
+        // so long titles don't autoshrink to nothing.
+        block.setInt(
+            R.id.widget_lesson_subject,
+            "setMaxLines",
+            if (noSecondaryContent) 2 else 1,
+        )
+        when {
+            hideSecondary -> {
+                applyOptionalText(block, R.id.widget_lesson_room, null)
+                applyOptionalText(block, R.id.widget_lesson_teacher, null)
+            }
+            heightDp < BLOCK_SHOW_TEACHER_SEPARATE_MIN_DP -> {
+                applyOptionalText(block, R.id.widget_lesson_room, room)
+                applyOptionalText(block, R.id.widget_lesson_teacher, null)
+            }
+            else -> {
+                applyOptionalText(block, R.id.widget_lesson_room, room)
+                applyOptionalText(block, R.id.widget_lesson_teacher, teacher)
+            }
+        }
+
+        parent.addView(containerId, block)
+    }
+
+    private fun applyOptionalText(views: RemoteViews, viewId: Int, text: String?) {
+        if (text.isNullOrEmpty()) {
+            views.setViewVisibility(viewId, View.GONE)
+        } else {
+            views.setTextViewText(viewId, text)
+            views.setViewVisibility(viewId, View.VISIBLE)
+        }
+    }
+
+    /// Custom-events use the user-picked palette (orange/red/green/blue,
+    /// mirroring CustomTimetableColors).
+    private fun statusDrawable(lesson: WidgetLesson): Int {
+        if (lesson.status == WidgetLessonStatus.EVENT && lesson.customColor != null) {
+            return when (lesson.customColor) {
+                "orange" -> R.drawable.widget_lesson_block_event_orange
+                "red" -> R.drawable.widget_lesson_block_event_red
+                "green" -> R.drawable.widget_lesson_block_event_green
+                "blue" -> R.drawable.widget_lesson_block_event_blue
+                else -> R.drawable.widget_lesson_block_event_orange
+            }
+        }
+        return when (lesson.status) {
+            WidgetLessonStatus.CANCELLED -> R.drawable.widget_lesson_block_cancelled
+            WidgetLessonStatus.IRREGULAR -> R.drawable.widget_lesson_block_irregular
+            WidgetLessonStatus.TEACHER_CHANGED -> R.drawable.widget_lesson_block_teacher_changed
+            WidgetLessonStatus.PAST -> R.drawable.widget_lesson_block_past
+            WidgetLessonStatus.EVENT -> R.drawable.widget_lesson_block_event_orange
+            // ONGOING collapses into REGULAR — widgets only refresh every
+            // ~30min so "the current lesson" is stale most of the time and
+            // the visual highlight would mislead more than help.
+            WidgetLessonStatus.ONGOING,
+            WidgetLessonStatus.REGULAR -> R.drawable.widget_lesson_block_regular
+        }
+    }
+
+    private fun subjectLabel(lesson: WidgetLesson): String {
+        return lesson.subjectShort.ifEmpty { lesson.subjectLong ?: "—" }
+    }
+
+    private fun roomLabel(lesson: WidgetLesson): String? = lesson.room
+
+    private fun teacherLabel(lesson: WidgetLesson): String? =
+        lesson.teacher ?: lesson.originalTeacher
+
+    private fun dayLabel(context: Context, anchor: Date): String {
+        val today = WidgetDateUtils.startOfDay(Date())
+        val tomorrow = Calendar.getInstance().apply {
+            time = today
+            add(Calendar.DAY_OF_YEAR, 1)
+        }.time
+        val anchorStart = WidgetDateUtils.startOfDay(anchor)
+        return when {
+            anchorStart == today -> context.getString(R.string.widget_today)
+            anchorStart == tomorrow -> context.getString(R.string.widget_tomorrow)
+            else -> SimpleDateFormat("EEEE", Locale.GERMAN).format(anchor)
+        }
+    }
+
+    private fun freshnessLabel(context: Context, fetchedAt: Date): String {
+        val today = WidgetDateUtils.startOfDay(Date())
+        val fetchedDay = WidgetDateUtils.startOfDay(fetchedAt)
+        val yesterday = Calendar.getInstance().apply {
+            time = today
+            add(Calendar.DAY_OF_YEAR, -1)
+        }.time
+        val yesterdayPrefix = context.getString(R.string.widget_yesterday_prefix)
+        return when (fetchedDay) {
+            today -> timeFormat.format(fetchedAt)
+            yesterday -> "$yesterdayPrefix ${timeFormat.format(fetchedAt)}"
+            else -> dateTimeShort.format(fetchedAt)
+        }
+    }
+
+    private fun buildPlaceholder(
+        context: Context,
+        packageName: String,
+        message: String,
+        palette: WidgetPalette,
+    ): RemoteViews {
+        val views = RemoteViews(packageName, R.layout.widget_placeholder)
+        applyChrome(views, palette, null)
+        views.setTextColor(R.id.widget_placeholder_title, palette.textPrimary)
+        views.setTextColor(R.id.widget_placeholder_message, palette.textSecondary)
+        views.setTextViewText(
+            R.id.widget_placeholder_title,
+            context.getString(R.string.widget_placeholder_title),
+        )
+        views.setTextViewText(R.id.widget_placeholder_message, message)
+        views.setOnClickPendingIntent(
+            R.id.widget_placeholder_message,
+            openAppIntent(context),
+        )
+        return views
+    }
+
+    private fun openAppIntent(context: Context): PendingIntent {
+        // ACTION_MAIN + LAUNCHER mirrors a launcher tap; the boolean extra
+        // is consumed by Dart via WidgetNavigation to route to the timetable.
+        val intent = Intent(context, MainActivity::class.java).apply {
+            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_SINGLE_TOP
+            action = Intent.ACTION_MAIN
+            addCategory(Intent.CATEGORY_LAUNCHER)
+            putExtra("widget_open_timetable", true)
+        }
+        return PendingIntent.getActivity(
+            context,
+            0,
+            intent,
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE,
+        )
+    }
+
+    private fun sharedPrefs(context: Context): SharedPreferences {
+        return context.getSharedPreferences(
+            "HomeWidgetPreferences",
+            Context.MODE_PRIVATE,
+        )
+    }
+
+    const val KEY_DAY_DATA = "widget_data_day_v1"
+    const val KEY_WEEK_DATA = "widget_data_week_v1"
+    const val KEY_LOGGED_IN = "widget_data_logged_in_v1"
+    const val KEY_THEME_MODE = "widget_setting_theme_mode_v1"
+}

android/app/src/main/res/drawable/app_widget_background.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Plain rounded rectangle. We deliberately avoid ?attr/appWidgetRadius
+     because RemoteViews inflation does not resolve custom theme attributes
+     reliably across launchers. Hard-coded 20dp matches the system home-screen
+     radius closely on stock Android. -->
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners android:radius="20dp" />
+    <solid android:color="@color/widget_background" />
+</shape>

android/app/src/main/res/drawable/marianum_m_watermark.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Direct port of /home/elias/Bilder/marianum_m_white.svg.
+  - viewport matches the source SVG (70mm × 82.2mm).
+  - Transforms recreate the SVG's three nested matrices: outer scale+offset,
+    inner translate, and a final scale+y-flip that pulls the path data into
+    the visible coordinate space.
+  - Tinted at runtime via setColorFilter so light/dark themes can share one
+    drawable.
+-->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="70dp"
+    android:height="82dp"
+    android:viewportWidth="70.000168"
+    android:viewportHeight="82.227348">
+
+    <group
+        android:scaleX="0.26458333"
+        android:scaleY="0.26458334"
+        android:translateX="107.44411"
+        android:translateY="-80.482198">
+        <group
+            android:translateX="-749.41293"
+            android:translateY="290.52252">
+            <group
+                android:scaleX="0.13333333"
+                android:scaleY="-0.13333333"
+                android:translateX="0"
+                android:translateY="632.14667">
+                <path
+                    android:fillColor="#FFFFFF"
+                    android:pathData="M 3499.67,4594.33 c -16.43,-106.19 -29.71,-199.97 -43.79,-293.49 86.83,-19 138.5,-27.61 223.38,-43.82 63.81,-12.18 175.24,-20.4 179.64,-83.23 6.46,-92.69 -124.69,-55.41 -188.38,-43.81 -84.33,15.36 -159.13,28.84 -232.2,43.81 -13.68,-60.72 -26.83,-118.68 -39.43,-179.61 -36.76,-178.32 -73.67,-368.16 -105.11,-551.97 18.09,25.66 30.84,42.72 43.8,65.7 66.7,118.26 140.39,245.04 227.76,354.83 33.49,42.05 76.86,94.81 118.31,113.91 98.42,45.36 166.68,-22.2 170.87,-118.28 3.68,-85.28 -23.09,-181.17 -35.08,-275.99 -12.4,-98.19 -22.89,-194.93 -35.03,-275.98 72.44,102.69 147.93,269.64 240.95,381.12 27.51,33 73.55,80.61 118.27,87.62 218.76,34.33 126.58,-312.17 127.05,-473.13 0.4,-144.9 44.01,-255.37 175.21,-271.59 43.02,-5.31 105.84,11.16 112.7,-26.34 8.67,-47.38 -78.15,-60.52 -125.84,-61.28 -291.34,-4.51 -322.06,262.33 -311.01,573.88 -19.85,-18.57 -35.71,-47.53 -52.57,-74.47 -97.59,-155.88 -203.95,-327.22 -297.92,-503.79 -25.93,-48.79 -53.68,-114.7 -135.8,-83.23 -17.27,6.63 -48.25,44.39 -52.56,56.96 -19.58,57.19 1.55,137.42 8.76,205.89 21.54,203.72 57.81,389.09 78.87,587.01 -26.3,0.51 -43.93,-30.07 -56.96,-48.2 -46.9,-65.27 -86.02,-140.76 -127.04,-214.64 -52.84,-95.15 -108.23,-192.84 -157.71,-293.52 -75.25,-153.09 -188.6,-501.89 -242.12,-678.81 -8.67,-28.67 -17.7,-58.08 -26.3,-87.64 -7.48,-25.72 -10.39,-57.68 -35.05,-74.46 -100.02,18.93 -89.71,104.89 -70.09,205.9 47.35,243.43 170.89,706.45 211.48,946.04 -72.97,-70.97 -153.99,-207.41 -289.14,-236.55 -136.47,-29.44 -217.95,47.68 -271.6,122.66 -17.14,23.96 -41.43,49.54 -26.29,78.84 83.96,35.51 113.37,-65.2 197.15,-74.47 22.65,-2.5 54.56,2.4 74.46,8.78 132.4,42.34 237.57,218.76 297.87,346.07 74.16,156.45 125.32,330.5 148.95,490.64 -65.71,11.4 -142.96,22.15 -219.25,36.52 -109.8,20.72 -158.81,10.75 -201.29,59.86 9.15,41.95 41.41,60.8 70.1,83.24 126.26,-16.84 252.45,-33.77 372.36,-56.97 20.43,89.25 51.98,218.51 74.45,311.05 40.53,26.02 88.88,-8.43 105.17,-35.06 z" />
+            </group>
+        </group>
+    </group>
+</vector>

android/app/src/main/res/drawable/widget_grid_line.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@color/widget_divider" />
+</shape>

android/app/src/main/res/drawable/widget_lesson_block_cancelled.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item>
+        <shape android:shape="rectangle">
+            <corners android:radius="6dp" />
+            <solid android:color="@color/widget_lesson_cancelled" />
+            <stroke android:width="1.5dp" android:color="#C8FF0000" />
+        </shape>
+    </item>
+    <item
+        android:left="3dp"
+        android:top="3dp"
+        android:right="3dp"
+        android:bottom="3dp"
+        android:drawable="@drawable/widget_lesson_cancelled_x" />
+</layer-list>

android/app/src/main/res/drawable/widget_lesson_block_event_blue.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners android:radius="6dp" />
+    <solid android:color="#FF2196F3" />
+</shape>

android/app/src/main/res/drawable/widget_lesson_block_event_green.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners android:radius="6dp" />
+    <solid android:color="#FF4CAF50" />
+</shape>

android/app/src/main/res/drawable/widget_lesson_block_event_orange.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners android:radius="6dp" />
+    <solid android:color="#FFEF6C00" />
+</shape>

android/app/src/main/res/drawable/widget_lesson_block_event_red.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners android:radius="6dp" />
+    <solid android:color="#FF993333" />
+</shape>

android/app/src/main/res/drawable/widget_lesson_block_irregular.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners android:radius="6dp" />
+    <solid android:color="@color/widget_lesson_irregular" />
+</shape>

android/app/src/main/res/drawable/widget_lesson_block_ongoing.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners android:radius="6dp" />
+    <solid android:color="@color/widget_lesson_ongoing" />
+</shape>

android/app/src/main/res/drawable/widget_lesson_block_past.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners android:radius="6dp" />
+    <solid android:color="@color/widget_lesson_past" />
+</shape>

android/app/src/main/res/drawable/widget_lesson_block_regular.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners android:radius="6dp" />
+    <solid android:color="@color/widget_lesson_regular" />
+</shape>

android/app/src/main/res/drawable/widget_lesson_block_teacher_changed.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <corners android:radius="6dp" />
+    <solid android:color="@color/widget_lesson_teacher_changed" />
+</shape>

android/app/src/main/res/drawable/widget_lesson_cancelled_x.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="100dp"
+    android:height="100dp"
+    android:viewportWidth="100"
+    android:viewportHeight="100">
+    <path
+        android:strokeColor="#C8FF0000"
+        android:strokeWidth="5"
+        android:pathData="M0,0 L100,100 M100,0 L0,100" />
+</vector>

android/app/src/main/res/layout/widget_break_block.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/widget_break_block_root"
+    android:layout_width="match_parent"
+    android:layout_height="14dp"
+    android:layout_marginTop="0dp"
+    android:layout_marginStart="2dp"
+    android:layout_marginEnd="2dp" />

android/app/src/main/res/layout/widget_day.xml

@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- FrameLayout root so the Marianum watermark can sit at bottom|end behind
+     the actual widget content without disturbing the LinearLayout flow. -->
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/widget_root"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/app_widget_background">
+
+    <!-- Bottom-leading so the mark looks like it's peeking out of the lower
+         left corner. Width/height/start+bottom margins are overridden in the
+         renderer so the mark scales with the widget size. -->
+    <ImageView
+        android:id="@+id/widget_watermark"
+        android:layout_width="160dp"
+        android:layout_height="160dp"
+        android:layout_gravity="bottom|end"
+        android:scaleType="fitCenter"
+        android:importantForAccessibility="no"
+        android:contentDescription="@null"
+        android:alpha="0.025"
+        android:src="@drawable/marianum_m_watermark" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical"
+        android:padding="10dp">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:gravity="center_vertical">
+            <TextView
+                android:id="@+id/widget_day_title"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:textSize="14sp"
+                android:textStyle="bold"
+                android:textColor="@color/widget_text_primary"
+                android:singleLine="true"
+                android:ellipsize="end"
+                tools:text="Heute · 08.05." />
+            <TextView
+                android:id="@+id/widget_day_subtitle"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:textSize="10sp"
+                android:textColor="@color/widget_text_secondary"
+                tools:text="Stand: 14:32" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_weight="1"
+            android:layout_marginTop="6dp"
+            android:orientation="horizontal">
+
+            <FrameLayout
+                android:id="@+id/widget_day_time_labels"
+                android:layout_width="32dp"
+                android:layout_height="match_parent" />
+
+            <FrameLayout
+                android:layout_width="1dp"
+                android:layout_height="match_parent"
+                android:background="@color/widget_divider" />
+
+            <FrameLayout
+                android:id="@+id/widget_day_grid"
+                android:layout_width="0dp"
+                android:layout_height="match_parent"
+                android:layout_weight="1" />
+        </LinearLayout>
+
+        <TextView
+            android:id="@+id/widget_day_empty"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:visibility="gone"
+            android:textSize="13sp"
+            android:textColor="@color/widget_text_secondary"
+            android:gravity="center"
+            android:padding="12dp"
+            tools:text="Keine Stunden" />
+    </LinearLayout>
+</FrameLayout>

android/app/src/main/res/layout/widget_day_preview.xml

@@ -0,0 +1,185 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/widget_background">
+
+    <ImageView
+        android:layout_width="160dp"
+        android:layout_height="160dp"
+        android:layout_gravity="bottom|end"
+        android:layout_marginEnd="-28dp"
+        android:layout_marginBottom="-28dp"
+        android:scaleType="fitCenter"
+        android:importantForAccessibility="no"
+        android:contentDescription="@null"
+        android:alpha="0.018"
+        android:src="@drawable/marianum_m_watermark" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical"
+        android:padding="10dp">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:gravity="center_vertical">
+            <TextView
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:textSize="14sp"
+                android:textStyle="bold"
+                android:textColor="@color/widget_text_primary"
+                android:singleLine="true"
+                android:text="Heute · 06.05." />
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:textSize="10sp"
+                android:textColor="@color/widget_text_secondary"
+                android:text="Stand: 07:50" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_weight="1"
+            android:orientation="horizontal"
+            android:layout_marginTop="6dp">
+
+            <FrameLayout
+                android:layout_width="32dp"
+                android:layout_height="match_parent">
+
+                <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content"
+                    android:orientation="vertical" android:gravity="end" android:paddingEnd="3dp"
+                    android:layout_marginTop="22dp">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:textSize="11sp" android:textStyle="bold"
+                        android:textColor="@color/widget_text_primary" android:text="1." />
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:textSize="7sp" android:textColor="@color/widget_text_secondary" android:text="07:55" />
+                </LinearLayout>
+                <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content"
+                    android:orientation="vertical" android:gravity="end" android:paddingEnd="3dp"
+                    android:layout_marginTop="50dp">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:textSize="11sp" android:textStyle="bold"
+                        android:textColor="@color/widget_text_primary" android:text="2." />
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:textSize="7sp" android:textColor="@color/widget_text_secondary" android:text="08:40" />
+                </LinearLayout>
+                <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content"
+                    android:orientation="vertical" android:gravity="end" android:paddingEnd="3dp"
+                    android:layout_marginTop="79dp">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:textSize="11sp" android:textStyle="bold"
+                        android:textColor="@color/widget_text_primary" android:text="3." />
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:textSize="7sp" android:textColor="@color/widget_text_secondary" android:text="09:30" />
+                </LinearLayout>
+                <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content"
+                    android:orientation="vertical" android:gravity="end" android:paddingEnd="3dp"
+                    android:layout_marginTop="115dp">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:textSize="11sp" android:textStyle="bold"
+                        android:textColor="@color/widget_text_primary" android:text="4." />
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:textSize="7sp" android:textColor="@color/widget_text_secondary" android:text="10:35" />
+                </LinearLayout>
+                <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content"
+                    android:orientation="vertical" android:gravity="end" android:paddingEnd="3dp"
+                    android:layout_marginTop="142dp">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:textSize="11sp" android:textStyle="bold"
+                        android:textColor="@color/widget_text_primary" android:text="5." />
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:textSize="7sp" android:textColor="@color/widget_text_secondary" android:text="11:25" />
+                </LinearLayout>
+                <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content"
+                    android:orientation="vertical" android:gravity="end" android:paddingEnd="3dp"
+                    android:layout_marginTop="169dp">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:textSize="11sp" android:textStyle="bold"
+                        android:textColor="@color/widget_text_primary" android:text="6." />
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:textSize="7sp" android:textColor="@color/widget_text_secondary" android:text="12:15" />
+                </LinearLayout>
+            </FrameLayout>
+
+            <FrameLayout
+                android:layout_width="0dp"
+                android:layout_height="match_parent"
+                android:layout_weight="1">
+
+                <FrameLayout android:layout_width="match_parent" android:layout_height="1dp" android:layout_marginTop="29dp" android:background="@color/widget_divider" />
+                <FrameLayout android:layout_width="match_parent" android:layout_height="1dp" android:layout_marginTop="56dp" android:background="@color/widget_divider" />
+                <FrameLayout android:layout_width="match_parent" android:layout_height="1dp" android:layout_marginTop="83dp" android:background="@color/widget_divider" />
+                <FrameLayout android:layout_width="match_parent" android:layout_height="1dp" android:layout_marginTop="115dp" android:background="@color/widget_divider" />
+                <FrameLayout android:layout_width="match_parent" android:layout_height="1dp" android:layout_marginTop="143dp" android:background="@color/widget_divider" />
+                <FrameLayout android:layout_width="match_parent" android:layout_height="1dp" android:layout_marginTop="170dp" android:background="@color/widget_divider" />
+
+                <FrameLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="22dp"
+                    android:layout_marginTop="29dp"
+                    android:layout_marginStart="2dp"
+                    android:layout_marginEnd="2dp"
+                    android:padding="3dp"
+                    android:background="@drawable/widget_lesson_block_regular">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:textSize="11sp" android:textStyle="bold"
+                        android:textColor="@android:color/white" android:text="MA-LK" />
+                </FrameLayout>
+
+                <FrameLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="55dp"
+                    android:layout_marginTop="83dp"
+                    android:layout_marginStart="2dp"
+                    android:layout_marginEnd="2dp"
+                    android:padding="3dp"
+                    android:background="@drawable/widget_lesson_block_regular">
+                    <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:orientation="vertical">
+                        <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                            android:textSize="11sp" android:textStyle="bold"
+                            android:textColor="@android:color/white" android:text="DE-GK" />
+                        <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                            android:textSize="9sp" android:textColor="#CCFFFFFF" android:text="B11" />
+                    </LinearLayout>
+                </FrameLayout>
+
+                <FrameLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="22dp"
+                    android:layout_marginTop="143dp"
+                    android:layout_marginStart="2dp"
+                    android:layout_marginEnd="2dp"
+                    android:padding="3dp"
+                    android:background="@drawable/widget_lesson_block_cancelled">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:textSize="11sp" android:textStyle="bold"
+                        android:textColor="@android:color/white" android:text="BIO" />
+                </FrameLayout>
+
+                <FrameLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="22dp"
+                    android:layout_marginTop="170dp"
+                    android:layout_marginStart="2dp"
+                    android:layout_marginEnd="2dp"
+                    android:padding="3dp"
+                    android:background="@drawable/widget_lesson_block_teacher_changed">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
+                        android:textSize="11sp" android:textStyle="bold"
+                        android:textColor="@android:color/white" android:text="GE" />
+                </FrameLayout>
+            </FrameLayout>
+        </LinearLayout>
+    </LinearLayout>
+</FrameLayout>

android/app/src/main/res/layout/widget_grid_line.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/widget_grid_line_root"
+    android:layout_width="match_parent"
+    android:layout_height="1dp"
+    android:layout_marginTop="0dp"
+    android:background="@drawable/widget_grid_line" />

android/app/src/main/res/layout/widget_lesson_block.xml

@@ -0,0 +1,93 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/widget_lesson_block_root"
+    android:layout_width="match_parent"
+    android:layout_height="40dp"
+    android:layout_marginStart="2dp"
+    android:layout_marginEnd="2dp"
+    android:layout_marginTop="0dp"
+    android:paddingStart="7dp"
+    android:paddingEnd="7dp"
+    android:paddingTop="3dp"
+    android:paddingBottom="3dp"
+    android:background="@drawable/widget_lesson_block_regular">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="horizontal"
+        android:gravity="top"
+        android:baselineAligned="false">
+
+        <TextView
+            android:id="@+id/widget_lesson_subject"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:textStyle="bold"
+            android:textColor="@android:color/white"
+            android:maxLines="1"
+            android:ellipsize="end"
+            android:gravity="top|start"
+            android:includeFontPadding="false"
+            android:autoSizeTextType="uniform"
+            android:autoSizeMinTextSize="5sp"
+            android:autoSizeMaxTextSize="11sp"
+            android:autoSizeStepGranularity="1sp"
+            tools:text="MA-LK" />
+
+        <LinearLayout
+            android:id="@+id/widget_lesson_secondary_stack"
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:orientation="vertical"
+            android:gravity="top|end"
+            android:layout_marginStart="4dp">
+
+            <TextView
+                android:id="@+id/widget_lesson_room"
+                android:layout_width="wrap_content"
+                android:layout_height="12dp"
+                android:textColor="#CCFFFFFF"
+                android:maxLines="1"
+                android:ellipsize="end"
+                android:gravity="end|top"
+                android:includeFontPadding="false"
+                android:autoSizeTextType="uniform"
+                android:autoSizeMinTextSize="5sp"
+                android:autoSizeMaxTextSize="11sp"
+                android:autoSizeStepGranularity="1sp"
+                tools:text="A12" />
+
+            <TextView
+                android:id="@+id/widget_lesson_teacher"
+                android:layout_width="wrap_content"
+                android:layout_height="12dp"
+                android:textColor="#B3FFFFFF"
+                android:maxLines="1"
+                android:ellipsize="end"
+                android:gravity="end|top"
+                android:includeFontPadding="false"
+                android:autoSizeTextType="uniform"
+                android:autoSizeMinTextSize="5sp"
+                android:autoSizeMaxTextSize="11sp"
+                android:autoSizeStepGranularity="1sp"
+                tools:text="Müller" />
+        </LinearLayout>
+    </LinearLayout>
+
+    <TextView
+        android:id="@+id/widget_lesson_sibling_badge"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|start"
+        android:textStyle="bold"
+        android:textSize="12sp"
+        android:textColor="@android:color/white"
+        android:maxLines="1"
+        android:includeFontPadding="false"
+        android:visibility="gone"
+        tools:text="+1" />
+</FrameLayout>

android/app/src/main/res/layout/widget_placeholder.xml

@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/widget_root"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/app_widget_background">
+
+    <ImageView
+        android:id="@+id/widget_watermark"
+        android:layout_width="160dp"
+        android:layout_height="160dp"
+        android:layout_gravity="bottom|end"
+        android:scaleType="fitCenter"
+        android:importantForAccessibility="no"
+        android:contentDescription="@null"
+        android:alpha="0.025"
+        android:src="@drawable/marianum_m_watermark" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical"
+        android:gravity="center"
+        android:padding="16dp">
+
+        <TextView
+            android:id="@+id/widget_placeholder_title"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textSize="14sp"
+            android:textStyle="bold"
+            android:textColor="@color/widget_text_primary"
+            tools:text="Marianum Vertretungsplan" />
+
+        <TextView
+            android:id="@+id/widget_placeholder_message"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:gravity="center"
+            android:textSize="12sp"
+            android:layout_marginTop="6dp"
+            android:textColor="@color/widget_text_secondary"
+            tools:text="Bitte einloggen, um den Stundenplan zu laden" />
+    </LinearLayout>
+</FrameLayout>

android/app/src/main/res/layout/widget_time_label.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/widget_time_label_root"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginTop="0dp"
+    android:orientation="vertical"
+    android:gravity="end"
+    android:paddingEnd="3dp">
+
+    <TextView
+        android:id="@+id/widget_time_label_time"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textSize="9sp"
+        android:textColor="@color/widget_text_primary"
+        android:singleLine="true"
+        android:lineSpacingExtra="-2dp"
+        tools:text="07:55" />
+
+    <TextView
+        android:id="@+id/widget_time_label_number"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textSize="7sp"
+        android:textColor="@color/widget_text_secondary"
+        android:singleLine="true"
+        android:lineSpacingExtra="-2dp"
+        tools:text="1." />
+</LinearLayout>

android/app/src/main/res/layout/widget_week.xml

@@ -0,0 +1,185 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/widget_root"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/app_widget_background">
+
+    <ImageView
+        android:id="@+id/widget_watermark"
+        android:layout_width="160dp"
+        android:layout_height="160dp"
+        android:layout_gravity="bottom|end"
+        android:scaleType="fitCenter"
+        android:importantForAccessibility="no"
+        android:contentDescription="@null"
+        android:alpha="0.025"
+        android:src="@drawable/marianum_m_watermark" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical"
+        android:padding="10dp">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:gravity="center_vertical">
+            <TextView
+                android:id="@+id/widget_week_title"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:textSize="14sp"
+                android:textStyle="bold"
+                android:textColor="@color/widget_text_primary"
+                android:singleLine="true"
+                android:ellipsize="end"
+                tools:text="KW 19 · 06.05.–10.05." />
+            <TextView
+                android:id="@+id/widget_week_subtitle"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:textSize="10sp"
+                android:textColor="@color/widget_text_secondary"
+                tools:text="Stand: 14:32" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:layout_marginTop="6dp">
+
+            <FrameLayout
+                android:layout_width="28dp"
+                android:layout_height="wrap_content" />
+
+            <FrameLayout
+                android:layout_width="1dp"
+                android:layout_height="match_parent"
+                android:background="@color/widget_divider" />
+
+            <FrameLayout
+                android:id="@+id/widget_week_header_mon"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1" />
+
+            <FrameLayout
+                android:layout_width="1dp"
+                android:layout_height="match_parent"
+                android:background="@color/widget_divider" />
+
+            <FrameLayout
+                android:id="@+id/widget_week_header_tue"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1" />
+
+            <FrameLayout
+                android:layout_width="1dp"
+                android:layout_height="match_parent"
+                android:background="@color/widget_divider" />
+
+            <FrameLayout
+                android:id="@+id/widget_week_header_wed"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1" />
+
+            <FrameLayout
+                android:layout_width="1dp"
+                android:layout_height="match_parent"
+                android:background="@color/widget_divider" />
+
+            <FrameLayout
+                android:id="@+id/widget_week_header_thu"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1" />
+
+            <FrameLayout
+                android:layout_width="1dp"
+                android:layout_height="match_parent"
+                android:background="@color/widget_divider" />
+
+            <FrameLayout
+                android:id="@+id/widget_week_header_fri"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1" />
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_weight="1"
+            android:layout_marginTop="2dp"
+            android:orientation="horizontal">
+
+            <FrameLayout
+                android:id="@+id/widget_week_time_labels"
+                android:layout_width="28dp"
+                android:layout_height="match_parent" />
+
+            <FrameLayout
+                android:layout_width="1dp"
+                android:layout_height="match_parent"
+                android:background="@color/widget_divider" />
+
+            <FrameLayout
+                android:id="@+id/widget_week_col_mon"
+                android:layout_width="0dp"
+                android:layout_height="match_parent"
+                android:layout_weight="1" />
+
+            <FrameLayout
+                android:layout_width="1dp"
+                android:layout_height="match_parent"
+                android:background="@color/widget_divider" />
+
+            <FrameLayout
+                android:id="@+id/widget_week_col_tue"
+                android:layout_width="0dp"
+                android:layout_height="match_parent"
+                android:layout_weight="1" />
+
+            <FrameLayout
+                android:layout_width="1dp"
+                android:layout_height="match_parent"
+                android:background="@color/widget_divider" />
+
+            <FrameLayout
+                android:id="@+id/widget_week_col_wed"
+                android:layout_width="0dp"
+                android:layout_height="match_parent"
+                android:layout_weight="1" />
+
+            <FrameLayout
+                android:layout_width="1dp"
+                android:layout_height="match_parent"
+                android:background="@color/widget_divider" />
+
+            <FrameLayout
+                android:id="@+id/widget_week_col_thu"
+                android:layout_width="0dp"
+                android:layout_height="match_parent"
+                android:layout_weight="1" />
+
+            <FrameLayout
+                android:layout_width="1dp"
+                android:layout_height="match_parent"
+                android:background="@color/widget_divider" />
+
+            <FrameLayout
+                android:id="@+id/widget_week_col_fri"
+                android:layout_width="0dp"
+                android:layout_height="match_parent"
+                android:layout_weight="1" />
+        </LinearLayout>
+    </LinearLayout>
+</FrameLayout>

android/app/src/main/res/layout/widget_week_day_header.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/widget_week_day_header_root"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:gravity="center"
+    android:paddingTop="2dp"
+    android:paddingBottom="3dp">
+
+    <TextView
+        android:id="@+id/widget_week_day_header_weekday"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textSize="11sp"
+        android:textStyle="bold"
+        android:textColor="@color/widget_text_primary"
+        tools:text="Mo" />
+
+    <TextView
+        android:id="@+id/widget_week_day_header_date"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textSize="9sp"
+        android:textColor="@color/widget_text_secondary"
+        tools:text="06.05." />
+</LinearLayout>

android/app/src/main/res/layout/widget_week_preview.xml

@@ -0,0 +1,147 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Static preview for the week widget. Five day columns with two short
+     demo blocks each so the structure is recognisable in the picker. -->
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/widget_background">
+
+    <ImageView
+        android:layout_width="200dp"
+        android:layout_height="200dp"
+        android:layout_gravity="bottom|end"
+        android:layout_marginEnd="-36dp"
+        android:layout_marginBottom="-36dp"
+        android:scaleType="fitCenter"
+        android:importantForAccessibility="no"
+        android:contentDescription="@null"
+        android:alpha="0.018"
+        android:src="@drawable/marianum_m_watermark" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical"
+        android:padding="10dp">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:gravity="center_vertical">
+            <TextView
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:textSize="14sp"
+                android:textStyle="bold"
+                android:textColor="@color/widget_text_primary"
+                android:singleLine="true"
+                android:text="KW 19 · 06.05.–10.05." />
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:textSize="10sp"
+                android:textColor="@color/widget_text_secondary"
+                android:text="Stand: 07:50" />
+        </LinearLayout>
+
+        <!-- Day-name + date row -->
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:layout_marginTop="6dp">
+            <FrameLayout android:layout_width="20dp" android:layout_height="wrap_content" />
+            <FrameLayout android:layout_width="1dp" android:layout_height="match_parent" android:background="@color/widget_divider" />
+            <LinearLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:orientation="vertical" android:gravity="center">
+                <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="11sp" android:textStyle="bold" android:textColor="@color/widget_text_primary" android:text="Mo" />
+                <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="9sp" android:textColor="@color/widget_text_secondary" android:text="06.05." />
+            </LinearLayout>
+            <FrameLayout android:layout_width="1dp" android:layout_height="match_parent" android:background="@color/widget_divider" />
+            <LinearLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:orientation="vertical" android:gravity="center">
+                <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="11sp" android:textStyle="bold" android:textColor="@color/widget_text_primary" android:text="Di" />
+                <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="9sp" android:textColor="@color/widget_text_secondary" android:text="07.05." />
+            </LinearLayout>
+            <FrameLayout android:layout_width="1dp" android:layout_height="match_parent" android:background="@color/widget_divider" />
+            <LinearLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:orientation="vertical" android:gravity="center">
+                <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="11sp" android:textStyle="bold" android:textColor="@color/widget_text_primary" android:text="Mi" />
+                <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="9sp" android:textColor="@color/widget_text_secondary" android:text="08.05." />
+            </LinearLayout>
+            <FrameLayout android:layout_width="1dp" android:layout_height="match_parent" android:background="@color/widget_divider" />
+            <LinearLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:orientation="vertical" android:gravity="center">
+                <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="11sp" android:textStyle="bold" android:textColor="@color/widget_text_primary" android:text="Do" />
+                <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="9sp" android:textColor="@color/widget_text_secondary" android:text="09.05." />
+            </LinearLayout>
+            <FrameLayout android:layout_width="1dp" android:layout_height="match_parent" android:background="@color/widget_divider" />
+            <LinearLayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:orientation="vertical" android:gravity="center">
+                <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="11sp" android:textStyle="bold" android:textColor="@color/widget_text_primary" android:text="Fr" />
+                <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="9sp" android:textColor="@color/widget_text_secondary" android:text="10.05." />
+            </LinearLayout>
+        </LinearLayout>
+
+        <!-- Time grid: time-label column + 5 day columns -->
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_weight="1"
+            android:orientation="horizontal"
+            android:layout_marginTop="2dp">
+
+            <FrameLayout android:layout_width="20dp" android:layout_height="match_parent">
+                <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="0dp" android:gravity="end" android:paddingEnd="3dp" android:textSize="8sp" android:textColor="@color/widget_text_secondary" android:text="08" />
+                <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="36dp" android:gravity="end" android:paddingEnd="3dp" android:textSize="8sp" android:textColor="@color/widget_text_secondary" android:text="10" />
+                <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="72dp" android:gravity="end" android:paddingEnd="3dp" android:textSize="8sp" android:textColor="@color/widget_text_secondary" android:text="12" />
+            </FrameLayout>
+            <FrameLayout android:layout_width="1dp" android:layout_height="match_parent" android:background="@color/widget_divider" />
+
+            <!-- Mon -->
+            <FrameLayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1">
+                <FrameLayout android:layout_width="match_parent" android:layout_height="14dp" android:layout_marginTop="2dp" android:layout_marginStart="1dp" android:layout_marginEnd="1dp" android:padding="2dp" android:background="@drawable/widget_lesson_block_regular">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="9sp" android:textStyle="bold" android:textColor="@android:color/white" android:text="MA" />
+                </FrameLayout>
+                <FrameLayout android:layout_width="match_parent" android:layout_height="14dp" android:layout_marginTop="40dp" android:layout_marginStart="1dp" android:layout_marginEnd="1dp" android:padding="2dp" android:background="@drawable/widget_lesson_block_regular">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="9sp" android:textStyle="bold" android:textColor="@android:color/white" android:text="EN" />
+                </FrameLayout>
+            </FrameLayout>
+            <FrameLayout android:layout_width="1dp" android:layout_height="match_parent" android:background="@color/widget_divider" />
+
+            <!-- Tue -->
+            <FrameLayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1">
+                <FrameLayout android:layout_width="match_parent" android:layout_height="14dp" android:layout_marginTop="20dp" android:layout_marginStart="1dp" android:layout_marginEnd="1dp" android:padding="2dp" android:background="@drawable/widget_lesson_block_cancelled">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="9sp" android:textStyle="bold" android:textColor="@android:color/white" android:text="BIO" />
+                </FrameLayout>
+                <FrameLayout android:layout_width="match_parent" android:layout_height="14dp" android:layout_marginTop="60dp" android:layout_marginStart="1dp" android:layout_marginEnd="1dp" android:padding="2dp" android:background="@drawable/widget_lesson_block_regular">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="9sp" android:textStyle="bold" android:textColor="@android:color/white" android:text="DE" />
+                </FrameLayout>
+            </FrameLayout>
+            <FrameLayout android:layout_width="1dp" android:layout_height="match_parent" android:background="@color/widget_divider" />
+
+            <!-- Wed -->
+            <FrameLayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1">
+                <FrameLayout android:layout_width="match_parent" android:layout_height="32dp" android:layout_marginTop="2dp" android:layout_marginStart="1dp" android:layout_marginEnd="1dp" android:padding="2dp" android:background="@drawable/widget_lesson_block_regular">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="9sp" android:textStyle="bold" android:textColor="@android:color/white" android:text="MA" />
+                </FrameLayout>
+            </FrameLayout>
+            <FrameLayout android:layout_width="1dp" android:layout_height="match_parent" android:background="@color/widget_divider" />
+
+            <!-- Thu -->
+            <FrameLayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1">
+                <FrameLayout android:layout_width="match_parent" android:layout_height="14dp" android:layout_marginTop="2dp" android:layout_marginStart="1dp" android:layout_marginEnd="1dp" android:padding="2dp" android:background="@drawable/widget_lesson_block_teacher_changed">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="9sp" android:textStyle="bold" android:textColor="@android:color/white" android:text="GE" />
+                </FrameLayout>
+                <FrameLayout android:layout_width="match_parent" android:layout_height="14dp" android:layout_marginTop="40dp" android:layout_marginStart="1dp" android:layout_marginEnd="1dp" android:padding="2dp" android:background="@drawable/widget_lesson_block_regular">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="9sp" android:textStyle="bold" android:textColor="@android:color/white" android:text="PH" />
+                </FrameLayout>
+            </FrameLayout>
+            <FrameLayout android:layout_width="1dp" android:layout_height="match_parent" android:background="@color/widget_divider" />
+
+            <!-- Fri -->
+            <FrameLayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1">
+                <FrameLayout android:layout_width="match_parent" android:layout_height="14dp" android:layout_marginTop="20dp" android:layout_marginStart="1dp" android:layout_marginEnd="1dp" android:padding="2dp" android:background="@drawable/widget_lesson_block_regular">
+                    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="9sp" android:textStyle="bold" android:textColor="@android:color/white" android:text="EN" />
+                </FrameLayout>
+            </FrameLayout>
+        </LinearLayout>
+    </LinearLayout>
+</FrameLayout>

android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -1,5 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
   <background android:drawable="@drawable/ic_launcher_background"/>
-  <foreground android:drawable="@drawable/ic_launcher_foreground"/>
+  <foreground>
+      <inset
+          android:drawable="@drawable/ic_launcher_foreground"
+          android:inset="16%" />
+  </foreground>
 </adaptive-icon>

android/app/src/main/res/values-night/widget_colors.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="widget_background">#FF1F1716</color>
+    <color name="widget_text_primary">#FFF1F1F1</color>
+    <color name="widget_text_secondary">#FFB0B0B0</color>
+    <color name="widget_divider">#33FFFFFF</color>
+</resources>

android/app/src/main/res/values/strings.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="widget_day_label">Marianum · Heute</string>
+    <string name="widget_week_label">Marianum · Woche</string>
+    <string name="widget_day_description">Stundenplan und Vertretungen für den anstehenden Schultag.</string>
+    <string name="widget_week_description">Stundenplan und Vertretungen für die ganze Schulwoche.</string>
+    <string name="widget_no_lessons">Keine Stunden</string>
+    <string name="widget_holiday">Ferien</string>
+    <string name="widget_login_required">Bitte einloggen, um den Stundenplan zu laden</string>
+    <string name="widget_loading">Lade…</string>
+    <string name="widget_status_label">Stand: %1$s</string>
+    <string name="widget_today">Heute</string>
+    <string name="widget_tomorrow">Morgen</string>
+    <string name="widget_placeholder_title">Marianum Stundenplan</string>
+    <string name="widget_calendar_week_prefix">KW</string>
+    <string name="widget_yesterday_prefix">gestern</string>
+</resources>

android/app/src/main/res/values/widget_colors.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Status colors mirror lib/view/pages/timetable/data/lesson_color.dart
+         exactly so widget tiles match the in-app calendar. -->
+    <color name="widget_lesson_regular">#FF993333</color>
+    <color name="widget_lesson_ongoing">#FFC83333</color>
+    <color name="widget_lesson_past">#FF993333</color>
+    <color name="widget_lesson_cancelled">#FF000000</color>
+    <color name="widget_lesson_irregular">#FF8F19B3</color>
+    <color name="widget_lesson_teacher_changed">#FF29639B</color>
+    <color name="widget_lesson_event">#FF2E7D32</color>
+
+    <color name="widget_background">#FFFCF7F5</color>
+    <color name="widget_text_primary">#FF111111</color>
+    <color name="widget_text_secondary">#FF555555</color>
+    <color name="widget_divider">#22000000</color>
+</resources>

android/app/src/main/res/xml/backup_rules.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Auto-Backup rules for Android 11 and below.
+     Excludes the home_widget plugin's SharedPreferences file
+     (HomeWidgetPreferences) so the cached timetable — which contains
+     teacher names, room numbers and personal custom events — is not
+     uploaded to the user's Google Drive. -->
+<full-backup-content>
+    <exclude domain="sharedpref" path="HomeWidgetPreferences.xml"/>
+</full-backup-content>

android/app/src/main/res/xml/data_extraction_rules.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Backup + device-transfer rules for Android 12+.
+     Excludes the home_widget plugin's SharedPreferences file
+     (HomeWidgetPreferences) so the cached timetable — which contains
+     teacher names, room numbers and personal custom events — is not
+     uploaded to the user's Google Drive or transferred to a new device.
+     The widget repopulates from a fresh Webuntis fetch after sign-in. -->
+<data-extraction-rules>
+    <cloud-backup>
+        <exclude domain="sharedpref" path="HomeWidgetPreferences.xml"/>
+    </cloud-backup>
+    <device-transfer>
+        <exclude domain="sharedpref" path="HomeWidgetPreferences.xml"/>
+    </device-transfer>
+</data-extraction-rules>

android/app/src/main/res/xml/network_security_config.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<network-security-config>
+    <!-- Allow cleartext for the MarianumConnect test instance only. Once the
+         production URL with HTTPS is live, drop this domain-config entry. -->
+    <domain-config cleartextTrafficPermitted="true">
+        <domain includeSubdomains="true">muelleel.ddns.net</domain>
+    </domain-config>
+</network-security-config>

android/app/src/main/res/xml/timetable_day_widget_info.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+    android:initialLayout="@layout/widget_placeholder"
+    android:minWidth="110dp"
+    android:minHeight="180dp"
+    android:targetCellWidth="2"
+    android:targetCellHeight="5"
+    android:resizeMode="horizontal|vertical"
+    android:widgetCategory="home_screen"
+    android:updatePeriodMillis="0"
+    android:description="@string/widget_day_description"
+    android:previewLayout="@layout/widget_day_preview" />

android/app/src/main/res/xml/timetable_week_widget_info.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+    android:initialLayout="@layout/widget_placeholder"
+    android:minWidth="320dp"
+    android:minHeight="240dp"
+    android:targetCellWidth="5"
+    android:targetCellHeight="5"
+    android:resizeMode="horizontal|vertical"
+    android:widgetCategory="home_screen"
+    android:updatePeriodMillis="0"
+    android:description="@string/widget_week_description"
+    android:previewLayout="@layout/widget_week_preview" />

android/build.gradle

@@ -9,6 +9,29 @@ rootProject.buildDir = '../build'
 subprojects {
     project.buildDir = "${rootProject.buildDir}/${project.name}"
 }
+// Pin every Android subproject to JVM 17 so plugins that ship Kotlin sources
+// compiled with a higher target (e.g. receive_sharing_intent at 21) or stale
+// Java compatibility (e.g. home_widget at 1.8) don't break the build under
+// newer Gradle/Kotlin tooling. Registered before evaluationDependsOn so the
+// afterEvaluate fires at the right point in the lifecycle.
+subprojects { sub ->
+    sub.afterEvaluate {
+        if (sub.hasProperty('android')) {
+            sub.android {
+                compileOptions {
+                    sourceCompatibility = JavaVersion.VERSION_17
+                    targetCompatibility = JavaVersion.VERSION_17
+                }
+            }
+        }
+        sub.tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
+            kotlinOptions {
+                jvmTarget = '17'
+            }
+        }
+    }
+}
+
 subprojects {
     project.evaluationDependsOn(':app')
 }

android/gradle.properties

@@ -1,3 +1,6 @@
 org.gradle.jvmargs=-Xmx4G
 android.useAndroidX=true
 android.enableJetifier=true
+android.defaults.buildfeatures.buildconfig=true
+android.nonTransitiveRClass=false
+android.nonFinalResIds=false

android/gradle/gradle-daemon-jvm.properties

@@ -0,0 +1,2 @@
+#This file is generated by updateDaemonJvm
+toolchainVersion=21

android/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.13-all.zip
 networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

android/settings.gradle

@@ -19,8 +19,10 @@ pluginManagement {
 
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "7.3.0" apply false
-    id "org.jetbrains.kotlin.android" version "1.8.10" apply false
+    id "com.android.application" version '8.13.2' apply false
+    id "com.android.library" version '8.13.2' apply false
+    id "org.jetbrains.kotlin.android" version "2.2.20" apply false
+    id 'org.gradle.toolchains.foojay-resolver-convention' version '0.10.0'
 }
 
 include ":app"

assets/ca/lets-encrypt-r10.pem

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+KPpdzvvtTnOPlC7SQZSYmdunr3Bf9b77AiC/ZidstK36dRILKz7OA54=
+-----END CERTIFICATE-----

assets/ca/lets-encrypt-r13.pem

@@ -0,0 +1,29 @@
+-----BEGIN CERTIFICATE-----
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assets/img/marianum_m_red.svg

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assets/img/marianum_m_white.svg

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devtools_options.yaml

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 extensions:
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+  - shared_preferences: true
+  - provider: true

flutter_launcher_icons.yaml

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+flutter_launcher_icons:
+  android: true
+  ios: true
+  remove_alpha_ios: true
+  image_path_android: "assets/logo/icon/ic_launcher.png"
+  image_path_ios: "assets/logo/icon/1024.png"
+  adaptive_icon_background: "assets/logo/icon/ic_launcher_adaptive_back.png" # only available for Android 8.0 devices and above
+  adaptive_icon_foreground: "assets/logo/icon/ic_launcher_adaptive_fore.png" # only available for Android 8.0 devices and above
+  min_sdk_android: 16 # android min sdk min:16, default 21