From 4da99c913cc1483b5fac0dddfc9c88fb8e41357d Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Mon, 28 Sep 2026 11:58:15 +0200
Subject: [PATCH] Navigation an iOS-Tabs angleichen, Benachrichtigungscenter,
 Einfacher Modus
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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Phase 2-4 der WebApp-Angleichung an die iOS-App:

- Navigation: Favoriten und Störungen sind jetzt eigene Top-Level-Tabs
  (Desktop-Tableiste + mobile Bottom-Nav) statt nur über das Mehr-Grid bzw.
  den Stern im Header erreichbar. Neue Header-Icons für Einstellungen (⚙)
  und Benachrichtigungen (🔔, mit rotem Punkt bei ungelesenen Einträgen).
  "Mehr" ist jetzt schlanker (In der Nähe, Tickets, Verlauf, App-Info mit
  Verbindungstest gegen /health/full) und die Sprachauswahl in einen neuen
  eigenen "Einstellungen"-Tab umgezogen.

- Benachrichtigungscenter (js/notifications.js, neu): persistenter
  Verlauf über IndexedDB, sowohl vom Service Worker (eingehende Web-Push-
  Nachrichten, auch bei geschlossenem Tab) als auch von der Seite selbst
  (Störungs-Matches bei Favoriten, Fahrtalarm) beschrieben. Neuer
  "Benachrichtigungen"-Tab zeigt den Verlauf, Badge am Glocken-Icon zeigt
  ungelesene Einträge, per postMessage vom Service Worker live aktualisiert.

- Einfacher Modus: neuer Toggle im Einstellungen-Tab, persistiert in
  localStorage, setzt eine .simple-mode-Klasse auf <html> - moderat
  größere Schrift plus Ausblenden von Verkehrsmittel-Filter/Fahrrad-Option/
  "Zwischenhalt hinzufügen" im Routenplaner, analog zur iOS-App (bewusst
  keine Accessibility-Schriftgrößenstufe, die ist für Screenreader gedacht).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01De7H8hR1Q9DdgyuS2ukN6y
---
 index.html          |  55 +++++++++++++++--
 js/api.js           |   7 +++
 js/app.js           | 143 +++++++++++++++++++++++++++++++++++++++++++-
 js/i18n.js          |  38 ++++++++++++
 js/notifications.js | 111 ++++++++++++++++++++++++++++++++++
 js/tripalarm.js     |   6 ++
 styles.css          |  84 ++++++++++++++++++++++++--
 sw.js               |  23 ++++++-
 8 files changed, 455 insertions(+), 12 deletions(-)
 create mode 100644 js/notifications.js

diff --git a/index.html b/index.html
index dcf8055..dbcda79 100644
--- a/index.html
+++ b/index.html
@@ -35,14 +35,20 @@
       <ul id="search-results" class="search-results" role="listbox" aria-label="Suchergebnisse" data-i18n-aria-label="search.resultsLabel" hidden></ul>
     </div>
 
+    <button id="header-settings-btn" class="header-icon-btn" data-tab="settings" type="button" title="Einstellungen" data-i18n-title="nav.settings" aria-label="Einstellungen" data-i18n-aria-label="nav.settings">⚙</button>
+    <button id="header-notifications-btn" class="header-icon-btn" data-tab="notifications" type="button" title="Benachrichtigungen" data-i18n-title="nav.notifications" aria-label="Benachrichtigungen" data-i18n-aria-label="nav.notifications">
+      🔔<span id="notifications-badge" class="notifications-badge" hidden></span>
+    </button>
     <button id="header-favorites-btn" class="header-icon-btn" data-tab="favorites" type="button" title="Favoriten" data-i18n-title="nav.favorites" aria-label="Favoriten" data-i18n-aria-label="nav.favorites">★</button>
   </header>
 
   <nav class="tab-nav" aria-label="Hauptnavigation">
     <div role="tablist" aria-label="Hauptnavigation" class="tab-nav__list">
       <button class="tab-button is-active" role="tab" aria-selected="true" aria-controls="panel-departures" id="tab-departures" tabindex="0" data-tab="departures"><span class="tab-button__icon" aria-hidden="true">🚏</span> <span data-i18n="nav.departures">Abfahrten</span></button>
+      <button class="tab-button" role="tab" aria-selected="false" aria-controls="panel-favorites" id="tab-favorites" tabindex="-1" data-tab="favorites"><span class="tab-button__icon" aria-hidden="true">★</span> <span data-i18n="favorites.title">Favoriten</span></button>
       <button class="tab-button" role="tab" aria-selected="false" aria-controls="panel-journey" id="tab-journey" tabindex="-1" data-tab="journey"><span class="tab-button__icon" aria-hidden="true">🧭</span> <span data-i18n="nav.route">Route</span></button>
       <button class="tab-button" role="tab" aria-selected="false" aria-controls="panel-map" id="tab-map" tabindex="-1" data-tab="map"><span class="tab-button__icon" aria-hidden="true">🗺</span> <span data-i18n="nav.map">Karte</span></button>
+      <button class="tab-button" role="tab" aria-selected="false" aria-controls="panel-disruptions" id="tab-disruptions" tabindex="-1" data-tab="disruptions"><span class="tab-button__icon" aria-hidden="true">⚠</span> <span data-i18n="disruptions.title">Störungen</span></button>
       <button class="tab-button" role="tab" aria-selected="false" aria-controls="panel-more" id="tab-more" tabindex="-1" data-tab="more"><span class="tab-button__icon" aria-hidden="true">☰</span> <span data-i18n="nav.more">Mehr</span></button>
     </div>
   </nav>
@@ -167,7 +173,7 @@
       <div id="nearby-list" class="nearby-list"><div class="board-empty-state" data-i18n="nearby.emptyState">Nutze deinen Standort, um Haltestellen in deiner Nähe zu finden.</div></div>
     </section>
 
-    <section class="tab-panel" data-tab-panel="favorites" hidden>
+    <section class="tab-panel" data-tab-panel="favorites" id="panel-favorites" role="tabpanel" aria-labelledby="tab-favorites mobile-tab-favorites" tabindex="-1" hidden>
       <div class="panel-heading">
         <div><span class="section-heading__eyebrow" data-i18n="favorites.eyebrow">SCHNELLZUGRIFF</span><h1 data-i18n="favorites.title">Meine Haltestellen</h1><p data-i18n="favorites.text">Deine gespeicherten Haltestellen mit Live-Abfahrten und Störungshinweisen.</p></div>
       </div>
@@ -185,7 +191,7 @@
       </div>
     </section>
 
-    <section class="tab-panel" data-tab-panel="disruptions" hidden>
+    <section class="tab-panel" data-tab-panel="disruptions" id="panel-disruptions" role="tabpanel" aria-labelledby="tab-disruptions mobile-tab-disruptions" tabindex="-1" hidden>
       <div class="panel-heading"><div><span class="section-heading__eyebrow" data-i18n="common.current">AKTUELL</span><h1 data-i18n="disruptions.title">Störungen</h1><p data-i18n="disruptions.text">Ortsbezogene und netzweite Hinweise.</p></div></div>
       <div class="disruption-section">
         <div class="section-heading"><div><h2 data-i18n="disruptions.nearbyTitle">In deiner Nähe</h2></div></div>
@@ -212,23 +218,59 @@
     <section class="tab-panel" data-tab-panel="more" id="panel-more" role="tabpanel" aria-labelledby="tab-more mobile-tab-more" tabindex="-1" hidden>
       <div class="panel-heading"><div><span class="section-heading__eyebrow" data-i18n="more.eyebrow">WEITERE FUNKTIONEN</span><h1 data-i18n="nav.more">Mehr</h1><p data-i18n="more.text">Alles, was nicht bei jeder Fahrt gebraucht wird.</p></div></div>
       <div class="more-grid">
-        <button class="more-card" data-open-tab="favorites" type="button"><span aria-hidden="true">★</span><strong data-i18n="favorites.title">Favoriten</strong><small data-i18n="more.favoritesText">Deine gespeicherten Haltestellen</small></button>
         <button class="more-card" data-open-tab="nearby" type="button"><span aria-hidden="true">📍</span><strong data-i18n="nearby.title">In der Nähe</strong><small data-i18n="more.nearbyText">Haltestellen in deiner Umgebung</small></button>
-        <button class="more-card" data-open-tab="disruptions" type="button"><span aria-hidden="true">⚠</span><strong data-i18n="disruptions.title">Störungen</strong><small data-i18n="more.disruptionsText">Ortsbezogen &amp; netzweit</small></button>
         <button class="more-card" data-open-tab="fares" type="button"><span aria-hidden="true">🎫</span><strong data-i18n="fares.title">Tickets</strong><small data-i18n="more.faresText">Preise &amp; wo kaufen</small></button>
+        <button class="more-card" data-open-tab="notifications" type="button"><span aria-hidden="true">🔔</span><strong data-i18n="notifications.title">Benachrichtigungen</strong><small data-i18n="more.notificationsText">Verlauf &amp; Push-Status</small></button>
+        <button class="more-card" data-open-tab="settings" type="button"><span aria-hidden="true">⚙</span><strong data-i18n="nav.settings">Einstellungen</strong><small data-i18n="more.settingsText">Sprache, Anzeige &amp; mehr</small></button>
       </div>
       <div class="recent-section">
         <div class="section-heading"><div><span class="section-heading__eyebrow" data-i18n="more.historyEyebrow">VERLAUF</span><h2 data-i18n="more.historyTitle">Zuletzt gesucht</h2></div><button id="clear-recent" class="text-button" type="button" data-i18n="common.clear">Leeren</button></div>
         <div id="recent-searches" class="recent-searches" role="list"></div>
       </div>
       <div class="recent-section">
-        <div class="section-heading"><div><span class="section-heading__eyebrow" data-i18n="more.langEyebrow">SPRACHE / LANGUAGE</span><h2 data-i18n="more.langTitle">Sprache</h2></div></div>
+        <div class="section-heading"><div><span class="section-heading__eyebrow" data-i18n="more.aboutEyebrow">ÜBER</span><h2 data-i18n="more.aboutTitle">App-Info</h2></div></div>
+        <div class="connection-check">
+          <div class="connection-check__row">
+            <span data-i18n="more.backend">Backend</span>
+            <span id="connection-status" class="connection-status">–</span>
+          </div>
+          <button id="connection-test-btn" class="text-button" type="button" data-i18n="more.testConnection">Verbindung testen</button>
+        </div>
+      </div>
+    </section>
+
+    <section class="tab-panel" data-tab-panel="settings" id="panel-settings" role="tabpanel" aria-labelledby="header-settings-btn" tabindex="-1" hidden>
+      <div class="panel-heading"><div><span class="section-heading__eyebrow" data-i18n="settings.eyebrow">EINSTELLUNGEN</span><h1 data-i18n="nav.settings">Einstellungen</h1><p data-i18n="settings.text">Anzeige, Sprache und Benachrichtigungen anpassen.</p></div></div>
+
+      <div class="settings-section">
+        <div class="section-heading"><div><h2 data-i18n="settings.displayTitle">Anzeige</h2></div></div>
+        <label class="settings-toggle">
+          <div class="settings-toggle__text">
+            <strong data-i18n="settings.simpleModeTitle">Einfacher Modus</strong>
+            <small data-i18n="settings.simpleModeText">Größere Schrift, weniger Optionen auf einen Blick.</small>
+          </div>
+          <input type="checkbox" id="settings-simple-mode" />
+        </label>
+      </div>
+
+      <div class="settings-section">
+        <div class="section-heading"><div><h2 data-i18n="more.langTitle">Sprache</h2></div></div>
         <div class="lang-switch" role="group" aria-label="Sprache / Language">
           <button id="lang-de" class="lang-switch__btn" type="button" data-lang="de" aria-pressed="true">Deutsch</button>
           <button id="lang-en" class="lang-switch__btn" type="button" data-lang="en" aria-pressed="false">English</button>
         </div>
       </div>
     </section>
+
+    <section class="tab-panel" data-tab-panel="notifications" id="panel-notifications" role="tabpanel" aria-labelledby="header-notifications-btn" tabindex="-1" hidden>
+      <div class="panel-heading">
+        <div><span class="section-heading__eyebrow" data-i18n="notifications.eyebrow">VERLAUF</span><h1 data-i18n="notifications.title">Benachrichtigungen</h1><p data-i18n="notifications.text">Alles, was zuletzt eine Push- oder In-App-Benachrichtigung ausgelöst hat.</p></div>
+        <button id="notifications-clear-btn" class="text-button" type="button" data-i18n="common.clear">Leeren</button>
+      </div>
+      <div id="notifications-list" class="notifications-list" role="list">
+        <div class="board-empty-state" data-i18n="notifications.empty">Noch keine Benachrichtigungen.</div>
+      </div>
+    </section>
   </main>
 
   <div class="global-disclaimer">
@@ -239,8 +281,10 @@
   <nav class="mobile-nav" aria-label="Hauptnavigation mobil">
     <div role="tablist" aria-label="Hauptnavigation mobil" class="mobile-nav__list">
       <button class="mobile-nav__item is-active" role="tab" aria-selected="true" aria-controls="panel-departures" id="mobile-tab-departures" tabindex="0" data-tab="departures"><span aria-hidden="true">🚏</span><small data-i18n="nav.departures">Abfahrten</small></button>
+      <button class="mobile-nav__item" role="tab" aria-selected="false" aria-controls="panel-favorites" id="mobile-tab-favorites" tabindex="-1" data-tab="favorites"><span aria-hidden="true">★</span><small data-i18n="favorites.title">Favoriten</small></button>
       <button class="mobile-nav__item" role="tab" aria-selected="false" aria-controls="panel-journey" id="mobile-tab-journey" tabindex="-1" data-tab="journey"><span aria-hidden="true">🧭</span><small data-i18n="nav.route">Route</small></button>
       <button class="mobile-nav__item" role="tab" aria-selected="false" aria-controls="panel-map" id="mobile-tab-map" tabindex="-1" data-tab="map"><span aria-hidden="true">🗺</span><small data-i18n="nav.map">Karte</small></button>
+      <button class="mobile-nav__item" role="tab" aria-selected="false" aria-controls="panel-disruptions" id="mobile-tab-disruptions" tabindex="-1" data-tab="disruptions"><span aria-hidden="true">⚠</span><small data-i18n="disruptions.title">Störungen</small></button>
       <button class="mobile-nav__item" role="tab" aria-selected="false" aria-controls="panel-more" id="mobile-tab-more" tabindex="-1" data-tab="more"><span aria-hidden="true">☰</span><small data-i18n="nav.more">Mehr</small></button>
     </div>
   </nav>
@@ -249,6 +293,7 @@
   <script src="js/config.js"></script>
   <script src="js/i18n.js"></script>
   <script src="js/api.js"></script>
+  <script src="js/notifications.js"></script>
   <script src="js/splitflap.js"></script>
   <script src="js/modefilter.js"></script>
   <script src="js/livemap.js"></script>
diff --git a/js/api.js b/js/api.js
index 183ed6c..0bc225d 100644
--- a/js/api.js
+++ b/js/api.js
@@ -154,6 +154,13 @@ const API = (() => {
       return request('/fares');
     },
 
+    // Einfacher Verbindungstest gegen den Health-Dashboard-Endpoint, analog
+    // zu APIClient.checkHealth() in der iOS-App - prüft nur, ob das Backend
+    // erreichbar ist (Reverse-Proxy/DNS/VPS korrekt konfiguriert).
+    checkHealth() {
+      return request('/health/full');
+    },
+
     getNearbyDisruptions({ lat, lon, distance, stops }) {
       return request(`/disruptions/nearby?${qs({ lat, lon, distance, stops })}`);
     },
diff --git a/js/app.js b/js/app.js
index a2d6913..275361f 100644
--- a/js/app.js
+++ b/js/app.js
@@ -5,6 +5,7 @@ const App = (() => {
   const SEEN_DISRUPTIONS_KEY = 'oepnv-navi:db-seen-disruptions';
   const WHEELCHAIR_KEY = 'oepnv-navi:db-wheelchair';
   const BIKE_KEY = 'oepnv-navi:db-bike';
+  const SIMPLE_MODE_KEY = 'oepnv-navi:db-simple-mode';
   const FAVORITES_POLL_MS = 30000;
   const MAX_VIAS = 3;
   const VIA_WAIT_OPTIONS = [0, 5, 10, 15, 20, 30, 45, 60];
@@ -209,11 +210,13 @@ const App = (() => {
   function notifyNewDisruption(favName, disruption) {
     const message = `${favName}: ${disruption.summary || 'Neue Störung'}`;
     showToast(message, 'warning');
+    const body = disruption.summary || disruption.text || 'Es liegt eine neue Störungsmeldung vor.';
+    recordNotification({ title: 'Störung bei ' + favName, body, icon: '⚠' });
 
     if (window.Notification && Notification.permission === 'granted') {
       try {
         new Notification('Störung bei ' + favName, {
-          body: disruption.summary || disruption.text || 'Es liegt eine neue Störungsmeldung vor.',
+          body,
           tag: `oepnv-navi-disruption-${favName}-${disruptionKey(disruption)}`,
         });
       } catch (err) {
@@ -222,6 +225,137 @@ const App = (() => {
     }
   }
 
+  // ---------- Benachrichtigungscenter ----------
+  //
+  // Persistiert lokal ausgelöste Benachrichtigungen (Störungen, Fahrtalarm)
+  // im selben IndexedDB-Store wie eingehende Web-Push-Nachrichten (siehe
+  // sw.js + js/notifications.js), damit der "Benachrichtigungen"-Tab wirklich
+  // alles zeigt, was aktuell eine Meldung auslöst - analog zum Glocken-Icon
+  // in der iOS-App.
+  function recordNotification({ title, body, icon }) {
+    if (!window.NotificationStore) return;
+    NotificationStore.add({ title, body, icon }).then(refreshNotificationBadge).catch(() => {});
+  }
+
+  async function refreshNotificationBadge() {
+    const badge = document.getElementById('notifications-badge');
+    if (!badge || !window.NotificationStore) return;
+    try {
+      const count = await NotificationStore.unreadCount();
+      badge.hidden = count === 0;
+    } catch (_) {
+      // IndexedDB evtl. nicht verfügbar (z.B. privater Modus) - Badge bleibt einfach versteckt
+    }
+  }
+
+  async function loadNotificationsPanel() {
+    const listEl = document.getElementById('notifications-list');
+    if (!listEl || !window.NotificationStore) return;
+
+    try {
+      const entries = await NotificationStore.list();
+      listEl.innerHTML = '';
+
+      if (entries.length === 0) {
+        listEl.innerHTML = `<div class="board-empty-state">${escapeHtml(I18N.t('notifications.empty'))}</div>`;
+      } else {
+        entries.forEach((entry) => {
+          const item = document.createElement('div');
+          item.className = `notification-item${entry.read ? '' : ' notification-item--unread'}`;
+          item.setAttribute('role', 'listitem');
+          const time = new Date(entry.timestamp).toLocaleString('de-DE', { day: '2-digit', month: '2-digit', hour: '2-digit', minute: '2-digit' });
+          item.innerHTML = `
+            <span class="notification-item__icon" aria-hidden="true">${escapeHtml(entry.icon || '🔔')}</span>
+            <div class="notification-item__body">
+              <strong>${escapeHtml(entry.title || '')}</strong>
+              <span>${escapeHtml(entry.body || '')}</span>
+            </div>
+            <span class="notification-item__time">${time}</span>
+          `;
+          listEl.appendChild(item);
+        });
+      }
+
+      await NotificationStore.markAllRead();
+      refreshNotificationBadge();
+    } catch (err) {
+      listEl.innerHTML = `<div class="board-error">⚠ ${escapeHtml(err.message)}</div>`;
+    }
+  }
+
+  function initNotificationsPanel() {
+    const clearBtn = document.getElementById('notifications-clear-btn');
+    if (clearBtn && window.NotificationStore) {
+      clearBtn.addEventListener('click', async () => {
+        await NotificationStore.clear();
+        loadNotificationsPanel();
+      });
+    }
+
+    // Der Service Worker meldet per postMessage, sobald eine Push-
+    // Benachrichtigung eintraf (siehe sw.js) - Badge sofort aktualisieren,
+    // auch während die App gerade offen ist.
+    if ('serviceWorker' in navigator) {
+      navigator.serviceWorker.addEventListener('message', (event) => {
+        if (event.data && event.data.type === 'oepnv-navi:notification-added') {
+          refreshNotificationBadge();
+          if (document.querySelector('[data-tab-panel="notifications"]:not([hidden])')) {
+            loadNotificationsPanel();
+          }
+        }
+      });
+    }
+
+    refreshNotificationBadge();
+  }
+
+  // ---------- Einstellungen ----------
+
+  // Einfacher Modus: moderat größere Schrift + weniger Optionen auf einen
+  // Blick (Verkehrsmittel-Filter/Fahrrad-Option im Routenplaner ausgeblendet),
+  // analog zum "Einfachen Modus" in der iOS-App - bewusst NICHT die
+  // Accessibility-Schriftgrößen-Stufe, die ist für Screenreader-Nutzung
+  // gedacht, nicht zum "einfacher gestalten".
+  function applySimpleMode(enabled) {
+    document.documentElement.classList.toggle('simple-mode', enabled);
+  }
+
+  function initSettingsPanel() {
+    const toggle = document.getElementById('settings-simple-mode');
+    if (!toggle) return;
+    const enabled = localStorage.getItem(SIMPLE_MODE_KEY) === 'true';
+    toggle.checked = enabled;
+    applySimpleMode(enabled);
+    toggle.addEventListener('change', () => {
+      localStorage.setItem(SIMPLE_MODE_KEY, toggle.checked ? 'true' : 'false');
+      applySimpleMode(toggle.checked);
+    });
+  }
+
+  // ---------- "Mehr": Verbindungstest ----------
+
+  function initMorePanel() {
+    const btn = document.getElementById('connection-test-btn');
+    const statusEl = document.getElementById('connection-status');
+    if (!btn || !statusEl) return;
+
+    btn.addEventListener('click', async () => {
+      statusEl.textContent = '…';
+      statusEl.className = 'connection-status';
+      btn.disabled = true;
+      try {
+        await API.checkHealth();
+        statusEl.textContent = I18N.t('more.connectionOk');
+        statusEl.classList.add('connection-status--ok');
+      } catch (err) {
+        statusEl.textContent = I18N.t('more.connectionError');
+        statusEl.classList.add('connection-status--error');
+      } finally {
+        btn.disabled = false;
+      }
+    });
+  }
+
   function renderFavoriteDisruption(card, favName, disruptions, seenMap, favId) {
     const el = card.querySelector('[data-disruption]');
     if (!el) return;
@@ -1003,6 +1137,10 @@ const App = (() => {
     if (tabName === 'fares' && !faresLoadedOnce) {
       loadFares();
     }
+
+    if (tabName === 'notifications') {
+      loadNotificationsPanel();
+    }
   }
 
   function initNearby() {
@@ -1766,6 +1904,9 @@ const App = (() => {
     initNearby();
     initNearbyDisruptions();
     initNotifications();
+    initNotificationsPanel();
+    initSettingsPanel();
+    initMorePanel();
     TripAlarm.load();
     renderFavoriteChips();
     renderRecentSearches();
diff --git a/js/i18n.js b/js/i18n.js
index ffae322..6b5c0e0 100644
--- a/js/i18n.js
+++ b/js/i18n.js
@@ -23,6 +23,8 @@ const I18N = (() => {
       'nav.route': 'Route',
       'nav.map': 'Karte',
       'nav.more': 'Mehr',
+      'nav.settings': 'Einstellungen',
+      'nav.notifications': 'Benachrichtigungen',
       'common.optional': 'OPTIONAL',
       'common.showAll': 'Alle anzeigen',
       'common.live': 'LIVE',
@@ -124,10 +126,27 @@ const I18N = (() => {
       'more.nearbyText': 'Haltestellen in deiner Umgebung',
       'more.disruptionsText': 'Ortsbezogen & netzweit',
       'more.faresText': 'Preise & wo kaufen',
+      'more.notificationsText': 'Verlauf & Push-Status',
+      'more.settingsText': 'Sprache, Anzeige & mehr',
       'more.historyEyebrow': 'VERLAUF',
       'more.historyTitle': 'Zuletzt gesucht',
       'more.langEyebrow': 'SPRACHE / LANGUAGE',
       'more.langTitle': 'Sprache',
+      'more.aboutEyebrow': 'ÜBER',
+      'more.aboutTitle': 'App-Info',
+      'more.backend': 'Backend',
+      'more.testConnection': 'Verbindung testen',
+      'more.connectionOk': 'Erreichbar',
+      'more.connectionError': 'Nicht erreichbar',
+      'notifications.eyebrow': 'VERLAUF',
+      'notifications.title': 'Benachrichtigungen',
+      'notifications.text': 'Alles, was zuletzt eine Push- oder In-App-Benachrichtigung ausgelöst hat.',
+      'notifications.empty': 'Noch keine Benachrichtigungen.',
+      'settings.eyebrow': 'EINSTELLUNGEN',
+      'settings.text': 'Anzeige, Sprache und Benachrichtigungen anpassen.',
+      'settings.displayTitle': 'Anzeige',
+      'settings.simpleModeTitle': 'Einfacher Modus',
+      'settings.simpleModeText': 'Größere Schrift, weniger Optionen auf einen Blick.',
       'search.noResults': 'Keine Treffer',
       'search.recentSearches': 'Zuletzt gesucht',
       'search.resultsLabel': 'Suchergebnisse',
@@ -144,6 +163,8 @@ const I18N = (() => {
       'nav.route': 'Route',
       'nav.map': 'Map',
       'nav.more': 'More',
+      'nav.settings': 'Settings',
+      'nav.notifications': 'Notifications',
       'common.optional': 'OPTIONAL',
       'common.showAll': 'Show all',
       'common.live': 'LIVE',
@@ -245,10 +266,27 @@ const I18N = (() => {
       'more.nearbyText': 'Stops around you',
       'more.disruptionsText': 'Local & network-wide',
       'more.faresText': 'Prices & where to buy',
+      'more.notificationsText': 'History & push status',
+      'more.settingsText': 'Language, display & more',
       'more.historyEyebrow': 'HISTORY',
       'more.historyTitle': 'Recently searched',
       'more.langEyebrow': 'SPRACHE / LANGUAGE',
       'more.langTitle': 'Language',
+      'more.aboutEyebrow': 'ABOUT',
+      'more.aboutTitle': 'App info',
+      'more.backend': 'Backend',
+      'more.testConnection': 'Test connection',
+      'more.connectionOk': 'Reachable',
+      'more.connectionError': 'Unreachable',
+      'notifications.eyebrow': 'HISTORY',
+      'notifications.title': 'Notifications',
+      'notifications.text': 'Everything that recently triggered a push or in-app notification.',
+      'notifications.empty': 'No notifications yet.',
+      'settings.eyebrow': 'SETTINGS',
+      'settings.text': 'Adjust display, language and notifications.',
+      'settings.displayTitle': 'Display',
+      'settings.simpleModeTitle': 'Simple mode',
+      'settings.simpleModeText': 'Larger text, fewer options at a glance.',
       'search.noResults': 'No results',
       'search.recentSearches': 'Recently searched',
       'search.resultsLabel': 'Search results',
diff --git a/js/notifications.js b/js/notifications.js
new file mode 100644
index 0000000..c1ae5a6
--- /dev/null
+++ b/js/notifications.js
@@ -0,0 +1,111 @@
+// Persistenter Benachrichtigungsverlauf ("Notification Center"), analog zum
+// Glocken-Icon in der iOS-App. Läuft als IndexedDB-Store, weil das - anders
+// als localStorage - sowohl vom offenen Tab als auch vom Service Worker aus
+// (auch bei geschlossenem Tab, siehe sw.js) beschrieben werden kann. Wird per
+// <script> in index.html UND per importScripts() in sw.js eingebunden, daher
+// bewusst keine ES-Module-Syntax.
+
+const NotificationStore = (() => {
+  const DB_NAME = 'oepnv-navi-notifications';
+  const STORE = 'notifications';
+  const MAX_ENTRIES = 50;
+
+  function openDb() {
+    return new Promise((resolve, reject) => {
+      if (!('indexedDB' in self)) {
+        reject(new Error('IndexedDB nicht verfügbar'));
+        return;
+      }
+      const req = indexedDB.open(DB_NAME, 1);
+      req.onupgradeneeded = () => {
+        const db = req.result;
+        if (!db.objectStoreNames.contains(STORE)) {
+          db.createObjectStore(STORE, { keyPath: 'id', autoIncrement: true });
+        }
+      };
+      req.onsuccess = () => resolve(req.result);
+      req.onerror = () => reject(req.error);
+    });
+  }
+
+  async function add(entry) {
+    const db = await openDb();
+    await new Promise((resolve, reject) => {
+      const tx = db.transaction(STORE, 'readwrite');
+      tx.objectStore(STORE).add({
+        title: entry.title || '',
+        body: entry.body || '',
+        url: entry.url || null,
+        icon: entry.icon || '🔔',
+        timestamp: entry.timestamp || Date.now(),
+        read: false,
+      });
+      tx.oncomplete = () => resolve();
+      tx.onerror = () => reject(tx.error);
+    });
+    await trim();
+  }
+
+  async function list() {
+    const db = await openDb();
+    return new Promise((resolve, reject) => {
+      const tx = db.transaction(STORE, 'readonly');
+      const req = tx.objectStore(STORE).getAll();
+      req.onsuccess = () => resolve(req.result.sort((a, b) => b.timestamp - a.timestamp));
+      req.onerror = () => reject(req.error);
+    });
+  }
+
+  async function clear() {
+    const db = await openDb();
+    await new Promise((resolve, reject) => {
+      const tx = db.transaction(STORE, 'readwrite');
+      tx.objectStore(STORE).clear();
+      tx.oncomplete = () => resolve();
+      tx.onerror = () => reject(tx.error);
+    });
+  }
+
+  async function markAllRead() {
+    const db = await openDb();
+    const entries = await list();
+    if (entries.length === 0) return;
+    await new Promise((resolve, reject) => {
+      const tx = db.transaction(STORE, 'readwrite');
+      const store = tx.objectStore(STORE);
+      entries.forEach((e) => store.put({ ...e, read: true }));
+      tx.oncomplete = () => resolve();
+      tx.onerror = () => reject(tx.error);
+    });
+  }
+
+  async function trim() {
+    const entries = await list();
+    if (entries.length <= MAX_ENTRIES) return;
+    const db = await openDb();
+    const toRemove = entries.slice(MAX_ENTRIES);
+    await new Promise((resolve, reject) => {
+      const tx = db.transaction(STORE, 'readwrite');
+      const store = tx.objectStore(STORE);
+      toRemove.forEach((e) => store.delete(e.id));
+      tx.oncomplete = () => resolve();
+      tx.onerror = () => reject(tx.error);
+    });
+  }
+
+  async function unreadCount() {
+    try {
+      const entries = await list();
+      return entries.filter((e) => !e.read).length;
+    } catch (_) {
+      return 0;
+    }
+  }
+
+  return { add, list, clear, markAllRead, unreadCount };
+})();
+
+// In der Seite (nicht im Service-Worker-Kontext) global verfügbar machen.
+if (typeof window !== 'undefined') {
+  window.NotificationStore = NotificationStore;
+}
diff --git a/js/tripalarm.js b/js/tripalarm.js
index d164190..5860d9b 100644
--- a/js/tripalarm.js
+++ b/js/tripalarm.js
@@ -150,6 +150,12 @@ const TripAlarm = (() => {
   }
 
   function notify(title, body) {
+    if (window.NotificationStore) {
+      NotificationStore.add({ title, body, icon: '⏰' }).then(() => {
+        const badge = document.getElementById('notifications-badge');
+        if (badge) badge.hidden = false;
+      }).catch(() => {});
+    }
     if (window.Notification && Notification.permission === 'granted') {
       try {
         new Notification(title, { body, tag: 'oepnv-navi-fahrtalarm' });
diff --git a/styles.css b/styles.css
index f367731..8fd26e7 100644
--- a/styles.css
+++ b/styles.css
@@ -1153,6 +1153,17 @@ button:active { transform: translateY(1px); }
   justify-content: center;
 }
 .header-icon-btn:hover { border-color: var(--signal-amber); }
+.header-icon-btn { position: relative; }
+.notifications-badge {
+  position: absolute;
+  top: 4px;
+  right: 5px;
+  width: 9px;
+  height: 9px;
+  border-radius: 50%;
+  background: var(--signal-red);
+  border: 1.5px solid var(--panel-raised);
+}
 
 .favorites-bar { display: none; }
 .tab-nav {
@@ -1526,6 +1537,68 @@ button:active { transform: translateY(1px); }
 .recent-item__remove:hover { background: var(--panel-raised); color: var(--signal-red); }
 .recent-empty { color: var(--ink-muted); font-size: 12px; padding: 8px 0; }
 
+.connection-check {
+  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
+  padding: 12px 14px; display: flex; flex-direction: column; gap: 8px;
+}
+.connection-check__row { display: flex; align-items: center; justify-content: space-between; font-size: 13px; }
+.connection-status { color: var(--ink-muted); font-weight: 600; }
+.connection-status--ok { color: var(--signal-green); }
+.connection-status--error { color: var(--signal-red); }
+
+.settings-section {
+  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
+  padding: 14px 16px; margin-bottom: 16px;
+}
+.settings-section .section-heading { margin-bottom: 10px; }
+.settings-toggle {
+  display: flex; align-items: center; justify-content: space-between; gap: 14px;
+  cursor: pointer;
+}
+.settings-toggle__text { display: flex; flex-direction: column; gap: 2px; }
+.settings-toggle__text strong { font-size: 14px; }
+.settings-toggle__text small { color: var(--ink-muted); font-size: 12px; }
+.settings-toggle input[type="checkbox"] {
+  appearance: none; -webkit-appearance: none; flex-shrink: 0;
+  width: 44px; height: 26px; border-radius: 999px;
+  background: var(--panel-raised); border: 1px solid var(--line);
+  position: relative; cursor: pointer;
+}
+.settings-toggle input[type="checkbox"]::before {
+  content: ''; position: absolute; top: 2px; left: 2px;
+  width: 20px; height: 20px; border-radius: 50%;
+  background: var(--ink-muted); transition: transform .15s ease, background .15s ease;
+}
+.settings-toggle input[type="checkbox"]:checked { border-color: var(--signal-amber); background: rgba(245,166,35,.18); }
+.settings-toggle input[type="checkbox"]:checked::before { background: var(--signal-amber); transform: translateX(18px); }
+
+.notifications-list { display: flex; flex-direction: column; gap: 8px; }
+.notification-item {
+  display: flex; align-items: flex-start; gap: 10px;
+  background: var(--panel); border: 1px solid var(--line); border-radius: 11px;
+  padding: 12px 14px;
+}
+.notification-item__icon { font-size: 18px; flex-shrink: 0; }
+.notification-item__body { flex: 1; min-width: 0; }
+.notification-item__body strong { display: block; font-size: 13px; }
+.notification-item__body span { display: block; color: var(--ink-muted); font-size: 12px; margin-top: 2px; }
+.notification-item__time { color: var(--ink-muted); font-size: 11px; flex-shrink: 0; white-space: nowrap; }
+.notification-item--unread { border-color: var(--signal-amber); }
+
+/* ============================================================
+   Einfacher Modus — moderat größere Schrift, reduzierte Optionen
+   (siehe Settings-Toggle in js/app.js, analog zur iOS-App)
+   ============================================================ */
+html.simple-mode { font-size: 112%; }
+html.simple-mode .journey-modes-field,
+html.simple-mode #journey-bike-row,
+html.simple-mode .journey-add-via {
+  display: none;
+}
+html.simple-mode .journey-submit,
+html.simple-mode .location-btn,
+html.simple-mode .when-choice { min-height: 46px; }
+
 .lang-switch { display: flex; gap: 8px; }
 .lang-switch__btn {
   background: var(--panel); color: var(--ink-muted); border: 1px solid var(--line);
@@ -2198,10 +2271,11 @@ button:active { transform: translateY(1px); }
 
 @media (max-width: 700px) {
   body { padding-bottom: 66px; }
-  .app-header { height: auto; min-height: 64px; padding: 10px 12px; gap: 12px; }
+  .app-header { height: auto; min-height: 64px; padding: 10px 12px; gap: 8px; }
   .brand { font-size: 15px; }
   .search-box--global { min-width: 0; }
   .search-box--global input { font-size: 14px; padding: 10px 38px; }
+  .header-icon-btn { width: 34px; height: 34px; font-size: 15px; }
   .tab-nav { display: none; }
   .app-main { padding: 16px 12px 28px; }
   .welcome-panel { padding: 20px 16px; }
@@ -2227,10 +2301,10 @@ button:active { transform: translateY(1px); }
        bedienbar bleiben, unabhängig von der Karte. */
     z-index: 1100; background: rgba(23,30,38,.97); border-top: 1px solid var(--line); padding: 5px 4px calc(5px + env(safe-area-inset-bottom));
   }
-  .mobile-nav__list { display: grid; grid-template-columns: repeat(4, 1fr); }
-  .mobile-nav__item { border: 0; background: transparent; color: var(--ink-muted); padding: 5px 2px; display: flex; flex-direction: column; align-items: center; gap: 2px; }
-  .mobile-nav__item span { font-size: 18px; line-height: 1.1; }
-  .mobile-nav__item small { font-size: 10px; }
+  .mobile-nav__list { display: grid; grid-template-columns: repeat(6, 1fr); }
+  .mobile-nav__item { border: 0; background: transparent; color: var(--ink-muted); padding: 5px 1px; display: flex; flex-direction: column; align-items: center; gap: 2px; }
+  .mobile-nav__item span { font-size: 16px; line-height: 1.1; }
+  .mobile-nav__item small { font-size: 8.5px; }
   .mobile-nav__item.is-active { color: var(--signal-amber); }
   .toast-container { bottom: calc(64px + env(safe-area-inset-bottom) + 12px); }
   .global-disclaimer { padding-bottom: calc(28px + 64px + env(safe-area-inset-bottom)); }
diff --git a/sw.js b/sw.js
index 18a2744..8cd4cb1 100644
--- a/sw.js
+++ b/sw.js
@@ -7,6 +7,17 @@
 // Service Workers ist standardmäßig auf sein eigenes Verzeichnis und alles
 // darunter beschränkt.
 
+// Schreibt jede eingehende Push-Nachricht zusätzlich in den persistenten
+// Benachrichtigungsverlauf (js/notifications.js), damit sie im "Mehr" >
+// "Benachrichtigungen"-Tab sichtbar ist - auch wenn sie ankam, während kein
+// Tab offen war (der Store läuft über IndexedDB, nicht über die Seite).
+try {
+  self.importScripts('./js/notifications.js');
+} catch (err) {
+  // Sollte importScripts fehlschlagen, bleibt die Push-Zustellung selbst
+  // trotzdem funktionsfähig - nur der Verlauf fehlt dann.
+}
+
 self.addEventListener('install', () => {
   self.skipWaiting();
 });
@@ -32,7 +43,17 @@ self.addEventListener('push', (event) => {
     data: { url: data.url || '/' },
   };
 
-  event.waitUntil(self.registration.showNotification(title, options));
+  event.waitUntil(
+    Promise.all([
+      self.registration.showNotification(title, options),
+      (typeof NotificationStore !== 'undefined'
+        ? NotificationStore.add({ title, body: options.body, url: options.data.url }).catch(() => {})
+        : Promise.resolve()),
+      self.clients.matchAll({ type: 'window', includeUncontrolled: true }).then((clientList) => {
+        clientList.forEach((client) => client.postMessage({ type: 'oepnv-navi:notification-added' }));
+      }),
+    ]),
+  );
 });
 
 // Klick auf die Benachrichtigung: vorhandenen App-Tab in den Vordergrund