dist files for v1.4.7 built

REQUIREMENTS.md

@@ -54,10 +54,13 @@ Das System umfasst die Darstellung von Menüplänen in einer Wochenübersicht, d
 | FR-071 | Die Hervorhebung muss anhand von Menüname und Beschreibung erfolgen (Substring-Matching, case-insensitive). | Niedrig | v1.1.0 |
 | FR-072 | Hervorgehobene Menüs müssen ein Tag-Badge mit dem matchenden Schlagwort anzeigen. | Niedrig | v1.2.4 |
 | FR-073 | Die Nächste-Woche-Navigation muss die Anzahl der dort gefundenen Highlights als Badge anzeigen. | Niedrig | v1.2.5 |
-| **Darstellung & Theming** | | | |
 | FR-080 | Das System muss einen hellen und einen dunklen Darstellungsmodus (Light/Dark Theme) unterstützen. | Niedrig | v1.0.1 |
 | FR-081 | Die Theme-Präferenz des Benutzers muss persistent gespeichert werden. | Niedrig | v1.0.1 |
 | FR-082 | Das System muss beim erstmaligen Laden die Betriebssystem-Präferenz für das Farbschema berücksichtigen. | Niedrig | v1.0.1 |
+| **Header UI & Navigation** | | | |
+| FR-090 | Die Hauptnavigation (Wochen-Toggles) muss linksbündig neben dem App-Titel positioniert sein. | Niedrig | v1.5.0 |
+| FR-091 | Ein dynamisches Alarm-Icon im Header muss den Überwachungsstatus geflaggter Menüs anzeigen (Gelb=Überwachung aktiv, Grün=Menü verfügbar, Versteckt=keine Flags). Der Tooltip muss den Zeitpunkt der letzten Prüfung als relativen String (z.B. "vor 4 Min.") enthalten. | Mittel | v1.5.0 |
+| FR-092 | Sobald über den Daten-Refresh erstmals Menüdaten für die Nächste Woche geladen werden, muss der entsprechende Navigation-Button animiert und farblich (Gelb) hervorgehoben werden. Zusätzlich muss einmalig ein Hinweis eingeblendet werden. Bei Klick auf den Button muss die Hervorhebung erlöschen. | Mittel | v1.6.0 |
 | **Benutzer-Feedback** | | | |
 | FR-090 | Alle benutzerrelevanten Aktionen (Bestellung, Stornierung, Fehler) müssen durch nicht-blockierende Benachrichtigungen (Toasts) bestätigt werden. | Mittel | v1.0.1 |
 | FR-091 | Bei einem Verbindungsfehler muss ein Fehlerdialog mit Fallback-Link zur Originalseite angezeigt werden. | Mittel | v1.0.1 |
@@ -69,6 +72,7 @@ Das System umfasst die Darstellung von Menüplänen in einer Wochenübersicht, d
 | FR-112 | Benutzer müssen eine Versionsliste mit Installationslinks einsehen können (Versionsmenü). | Niedrig | v1.3.0 |
 | FR-113 | Es muss möglich sein, zu einer älteren Version zurückzukehren (Downgrade). | Niedrig | v1.3.0 |
 | FR-114 | Ein Dev-Mode muss es ermöglichen, zwischen stabilen Releases und Entwicklungs-Tags umzuschalten. | Niedrig | v1.3.0 |
+| FR-115 | Das Versionsmenü muss Links zur Erstellung von Feature-Requests und Bug-Reports auf GitHub enthalten. | Niedrig | v1.4.4 |
 
 ## 3. Nicht-funktionale Anforderungen
 

build-bookmarklet.sh

@@ -171,7 +171,7 @@ cat > "$DIST_DIR/install.html" << INSTALLEOF
     </div>
 
     <div style="text-align: center; margin-top: 40px; color: #5c6b7f; font-size: 0.8rem;">
-        <p>Powered by <strong>Kaufi-Kitchen</strong> 👨‍🍳</p>
+        <p>Powered by <strong>Kaufis-Kitchen</strong> 👨‍🍳</p>
     </div>
 
 

changelog.md

@@ -1,3 +1,18 @@
+## v1.4.7 (2026-02-24)
+- **Performance**: Die Bestellhistorie nutzt nun einen inkrementellen Delta-Cache anstatt immer alle Seiten von der API herunterzuladen, was die Ladezeiten für Vielbesteller enorm reduziert.
+
+## v1.4.6 (2026-02-24)
+- **Fix**: Die Umrandung für bereits bestellte Menüs der vergangenen Tage ist nun ebenfalls einheitlich violett statt blau.
+
+## v1.4.5 (2026-02-24)
+- **Fix**: Doppelten Scrollbalken in der Versionen-Liste entfernt.
+
+## v1.4.4 (2026-02-24)
+- **Feature**: Das Versionsmenü enthält nun direkte Links zu GitHub, um Fehler zu melden oder neue Features vorzuschlagen.
+
+## v1.4.3 (2026-02-24)
+- **Fix**: Der Rahmen des "Heute Bestellt" Menüs ist nun konsequent violett (passend zum Glow-Effekt).
+
 ## v1.4.2 (2026-02-23)
 - **Fix**: Das "Heute Bestellt" Menü leuchtet nun stimmig im Design-Violett statt Blau.
 - **Fix**: Abfangen des GitHub API Rate Limit (403) im Versionsdialog mit einer freundlicheren Fehlermeldung, da der User-Agent im Browser nicht manuell gesetzt werden darf.

dist/kantine-standalone.html

@@ -197,6 +197,32 @@ body {
     color: white;
 }
 
+/* Notification state for Next Week */
+.nav-btn.new-week-available {
+    animation: goldPulse 2s infinite;
+    border-color: #f59e0b;
+    color: var(--accent-color);
+}
+
+.nav-btn.new-week-available.active {
+    color: white;
+}
+
+@keyframes goldPulse {
+    0% {
+        box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.7);
+    }
+
+    70% {
+        box-shadow: 0 0 0 10px rgba(245, 158, 11, 0);
+    }
+
+    100% {
+        box-shadow: 0 0 0 0 rgba(245, 158, 11, 0);
+    }
+}
+
+
 /* Badge for nav buttons (day count indicator) */
 .nav-badge {
     background-color: var(--error-color);
@@ -786,7 +812,7 @@ body {
     /* No opacity/filter here - fully visible */
     background: var(--bg-card);
     box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
-    border: 1px solid var(--accent-color);
+    border: 1px solid #8b5cf6;
     border-radius: 8px;
     padding: 1rem;
     margin: 0 -1rem 1.5rem -1rem;
@@ -795,7 +821,7 @@ body {
 }
 
 .menu-item.today-ordered {
-    border: 2px solid var(--accent-color);
+    border: 2px solid #8b5cf6;
     box-shadow: 0 0 20px rgba(139, 92, 246, 0.4);
     border-radius: 8px;
     padding: 1rem;
@@ -1606,8 +1632,6 @@ body {
 .version-list {
     list-style: none;
     padding: 0;
-    max-height: 350px;
-    overflow-y: auto;
     margin: 0;
 }
 
@@ -1997,9 +2021,16 @@ body {
                     <div class="brand">
                         <span class="material-icons-round logo-icon">restaurant_menu</span>
                         <div class="header-left">
-                            <h1>Kantinen Übersicht <small class="version-tag" style="font-size: 0.6em; opacity: 0.7; font-weight: 400; cursor: pointer;" title="Klick für Versionsmenü">v1.4.2</small></h1>
+                            <h1>Kantinen Übersicht <small class="version-tag" style="font-size: 0.6em; opacity: 0.7; font-weight: 400; cursor: pointer;" title="Klick für Versionsmenü">v1.4.7</small></h1>
                             <div id="last-updated-subtitle" class="subtitle"></div>
                         </div>
+                        <div class="nav-group" style="margin-left: 1rem;">
+                            <button id="btn-this-week" class="nav-btn active">Diese Woche</button>
+                            <button id="btn-next-week" class="nav-btn">Nächste Woche</button>
+                        </div>
+                        <button id="alarm-bell" class="icon-btn hidden" aria-label="Benachrichtigungen" title="Keine beobachteten Menüs" style="margin-left: -0.5rem;">
+                            <span class="material-icons-round" id="alarm-bell-icon" style="color:var(--text-secondary); transition: color 0.3s;">notifications</span>
+                        </button>
                     </div>
                     <div class="header-center-wrapper">
                         <div id="header-week-info" class="header-week-info"></div>
@@ -2015,10 +2046,6 @@ body {
                         <button id="btn-highlights" class="icon-btn" aria-label="Persönliche Highlights verwalten" title="Persönliche Highlights verwalten">
                             <span class="material-icons-round">label</span>
                         </button>
-                        <div class="nav-group">
-                            <button id="btn-this-week" class="nav-btn active">Diese Woche</button>
-                            <button id="btn-next-week" class="nav-btn">Nächste Woche</button>
-                        </div>
                         <button id="theme-toggle" class="icon-btn" aria-label="Toggle Theme">
                             <span class="material-icons-round theme-icon">light_mode</span>
                         </button>
@@ -2136,7 +2163,7 @@ body {
                     </div>
                     <div class="modal-body">
                         <div style="margin-bottom: 1rem;">
-                            <strong>Aktuell:</strong> <span id="version-current">v1.4.2</span>
+                            <strong>Aktuell:</strong> <span id="version-current">v1.4.7</span>
                         </div>
                         <div class="dev-toggle">
                             <label style="display:flex;align-items:center;gap:8px;cursor:pointer;">
@@ -2144,9 +2171,17 @@ body {
                                 <span>Dev-Mode (alle Tags anzeigen)</span>
                             </label>
                         </div>
-                        <div id="version-list-container" style="margin-top:1rem;">
+                        <div id="version-list-container" style="margin-top:1rem; max-height: 250px; overflow-y: auto;">
                             <p style="color:var(--text-secondary);">Lade Versionen...</p>
                         </div>
+                        <div style="margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--border-color); display: flex; flex-direction: column; gap: 0.75rem; font-size: 0.9em;">
+                            <a href="https://github.com/TauNeutrino/kantine-overview/issues" target="_blank" rel="noopener noreferrer" style="color: var(--primary-color); text-decoration: none; display: flex; align-items: center; gap: 0.5rem;" title="Melde einen Fehler auf GitHub">
+                                <span class="material-icons-round" style="font-size: 1.2em;">bug_report</span> Fehler melden
+                            </a>
+                            <a href="https://github.com/TauNeutrino/kantine-overview/discussions/categories/ideas" target="_blank" rel="noopener noreferrer" style="color: var(--primary-color); text-decoration: none; display: flex; align-items: center; gap: 0.5rem;" title="Schlage ein neues Feature auf GitHub vor">
+                                <span class="material-icons-round" style="font-size: 1.2em;">lightbulb</span> Feature vorschlagen
+                            </a>
+                        </div>
                     </div>
                 </div>
             </div>
@@ -2280,6 +2315,7 @@ body {
         });
 
         btnNextWeek.addEventListener('click', () => {
+            btnNextWeek.classList.remove('new-week-available');
             if (displayMode !== 'next-week') {
                 displayMode = 'next-week';
                 btnNextWeek.classList.add('active');
@@ -2484,24 +2520,49 @@ body {
         const progressFill = document.getElementById('history-progress-fill');
         const progressText = document.getElementById('history-progress-text');
 
+        // Check local storage cache (we still use memory cache if available)
+        let localCache = [];
         if (fullOrderHistoryCache) {
-            renderHistory(fullOrderHistoryCache);
-            return;
+            localCache = fullOrderHistoryCache;
+        } else {
+            const ls = localStorage.getItem('kantine_history_cache');
+            if (ls) {
+                try {
+                    localCache = JSON.parse(ls);
+                    fullOrderHistoryCache = localCache;
+                } catch (e) {
+                    console.warn('History cache parse error', e);
+                }
+            }
+        }
+
+        // Show cached version immediately if we have one
+        if (localCache.length > 0) {
+            renderHistory(localCache);
         }
 
         if (!authToken) return;
 
-        historyContent.innerHTML = '';
-        historyLoading.classList.remove('hidden');
-        progressFill.style.width = '0%';
-        progressText.textContent = 'Lade Bestellhistorie...';
+        // Start background delta sync
+        if (localCache.length === 0) {
+            historyContent.innerHTML = '';
+            historyLoading.classList.remove('hidden');
+        }
 
-        let nextUrl = `${API_BASE}/user/orders/?venue=${VENUE_ID}&ordering=-created&limit=50`;
-        let allOrders = [];
+        progressFill.style.width = '0%';
+        progressText.textContent = localCache.length > 0 ? 'Suche nach neuen Bestellungen...' : 'Lade Bestellhistorie...';
+        if (localCache.length > 0) historyLoading.classList.remove('hidden');
+
+        let nextUrl = localCache.length > 0
+            ? `${API_BASE}/user/orders/?venue=${VENUE_ID}&ordering=-created&limit=5`
+            : `${API_BASE}/user/orders/?venue=${VENUE_ID}&ordering=-created&limit=50`;
+        let fetchedOrders = [];
         let totalCount = 0;
+        let requiresFullFetch = localCache.length === 0;
+        let deltaComplete = false;
 
         try {
-            while (nextUrl) {
+            while (nextUrl && !deltaComplete) {
                 const response = await fetch(nextUrl, { headers: apiHeaders(authToken) });
                 if (!response.ok) throw new Error(`Fetch failed: ${response.status}`);
 
@@ -2511,26 +2572,75 @@ body {
                     totalCount = data.count;
                 }
 
-                allOrders = allOrders.concat(data.results || []);
+                const results = data.results || [];
 
-                // Update progress
-                if (totalCount > 0) {
-                    const pct = Math.round((allOrders.length / totalCount) * 100);
-                    progressFill.style.width = `${pct}%`;
-                    progressText.textContent = `Lade Bestellung ${allOrders.length} von ${totalCount}...`;
-                } else {
-                    progressText.textContent = `Lade Bestellung ${allOrders.length}...`;
+                for (const order of results) {
+                    // Check if we hit an order that is already in our cache AND has the exact same state/update time
+                    // Bessa returns 'updated' timestamp, we can use it to determine if anything changed
+                    const existingOrderIndex = localCache.findIndex(cached => cached.id === order.id);
+
+                    if (!requiresFullFetch && existingOrderIndex !== -1) {
+                        const existingOrder = localCache[existingOrderIndex];
+                        // If order exists and wasn't updated since our cache, we've reached the point 
+                        // where everything older is already correctly cached.
+                        // order.updated is an ISO string like "2025-02-18T10:30:15.123456Z"
+                        if (existingOrder.updated === order.updated && existingOrder.order_state === order.order_state) {
+                            deltaComplete = true;
+                            break;
+                        }
+                    }
+                    fetchedOrders.push(order);
                 }
 
-                nextUrl = data.next;
+                // Update progress
+                if (!deltaComplete && requiresFullFetch) {
+                    if (totalCount > 0) {
+                        const pct = Math.round((fetchedOrders.length / totalCount) * 100);
+                        progressFill.style.width = `${pct}%`;
+                        progressText.textContent = `Lade Bestellung ${fetchedOrders.length} von ${totalCount}...`;
+                    } else {
+                        progressText.textContent = `Lade Bestellung ${fetchedOrders.length}...`;
+                    }
+                } else if (!deltaComplete) {
+                    progressText.textContent = `${fetchedOrders.length} neue/geänderte Bestellungen gefunden...`;
+                }
+
+                nextUrl = deltaComplete ? null : data.next;
             }
 
-            fullOrderHistoryCache = allOrders;
-            renderHistory(fullOrderHistoryCache);
+            // Merge fetched orders with cache
+            if (fetchedOrders.length > 0) {
+                // We have new/updated orders. We need to merge them into the cache.
+                // 1. Create a map of the existing cache for quick ID lookup
+                const cacheMap = new Map(localCache.map(o => [o.id, o]));
+
+                // 2. Update/Insert the newly fetched orders
+                for (const order of fetchedOrders) {
+                    cacheMap.set(order.id, order); // Overwrites existing, or adds new
+                }
+
+                // 3. Convert back to array and sort by created date (descending)
+                const mergedOrders = Array.from(cacheMap.values());
+                mergedOrders.sort((a, b) => new Date(b.created) - new Date(a.created));
+
+                fullOrderHistoryCache = mergedOrders;
+                try {
+                    localStorage.setItem('kantine_history_cache', JSON.stringify(mergedOrders));
+                } catch (e) {
+                    console.warn('History cache write error', e);
+                }
+
+                // Render the updated history
+                renderHistory(fullOrderHistoryCache);
+            }
 
         } catch (error) {
-            console.error('Error fetching full history:', error);
-            historyContent.innerHTML = `<p style="color:var(--error-color);text-align:center;">Fehler beim Laden der Historie.</p>`;
+            console.error('Error in history sync:', error);
+            if (localCache.length === 0) {
+                historyContent.innerHTML = `<p style="color:var(--error-color);text-align:center;">Fehler beim Laden der Historie.</p>`;
+            } else {
+                showToast('Hintergrund-Synchronisation fehlgeschlagen', 'error');
+            }
         } finally {
             historyLoading.classList.add('hidden');
         }
@@ -2732,6 +2842,7 @@ body {
 
             if (response.ok || response.status === 201) {
                 showToast(`Bestellt: ${name}`, 'success');
+                fullOrderHistoryCache = null; // Clear memory cache so next history open triggers delta sync
                 await fetchOrders();
             } else {
                 const data = await response.json();
@@ -2761,6 +2872,7 @@ body {
 
             if (response.ok) {
                 showToast(`Storniert: ${name}`, 'success');
+                fullOrderHistoryCache = null; // Clear memory cache so next history open triggers delta sync
                 await fetchOrders();
             } else {
                 const data = await response.json();
@@ -2777,6 +2889,55 @@ body {
         localStorage.setItem('kantine_flags', JSON.stringify([...userFlags]));
     }
 
+    function updateAlarmBell() {
+        const bellBtn = document.getElementById('alarm-bell');
+        const bellIcon = document.getElementById('alarm-bell-icon');
+        if (!bellBtn || !bellIcon) return;
+
+        if (userFlags.size === 0) {
+            bellBtn.classList.add('hidden');
+            return;
+        }
+
+        bellBtn.classList.remove('hidden');
+
+        // Check if any flagged item is available
+        let anyAvailable = false;
+        for (const wk of allWeeks) {
+            if (!wk.days) continue;
+            for (const d of wk.days) {
+                if (!d.items) continue;
+                for (const item of d.items) {
+                    if (item.available && userFlags.has(item.id)) {
+                        anyAvailable = true;
+                        break;
+                    }
+                }
+                if (anyAvailable) break;
+            }
+            if (anyAvailable) break;
+        }
+
+        const lastUpdatedStr = localStorage.getItem('kantine_last_updated');
+        let timeStr = 'Unbekannt';
+        if (lastUpdatedStr) {
+            const lastUpdated = new Date(lastUpdatedStr);
+            const diffMs = Date.now() - lastUpdated.getTime();
+            const diffMins = Math.floor(diffMs / 60000);
+            if (diffMins < 60) timeStr = `vor ${diffMins} Min.`;
+            else timeStr = `vor ${Math.floor(diffMins / 60)} Std.`;
+        }
+        bellBtn.title = `Zuletzt geprüft: ${timeStr}`;
+
+        if (anyAvailable) {
+            bellIcon.style.color = 'var(--warning-color)';
+            bellIcon.style.textShadow = '0 0 10px rgba(245, 158, 11, 0.4)';
+        } else {
+            bellIcon.style.color = 'var(--text-secondary)';
+            bellIcon.style.textShadow = 'none';
+        }
+    }
+
     function toggleFlag(date, articleId, name, cutoff) {
         const id = `${date}_${articleId}`;
         if (userFlags.has(id)) {
@@ -2790,6 +2951,7 @@ body {
             }
         }
         saveFlags();
+        updateAlarmBell();
         renderVisibleWeeks();
     }
 
@@ -3158,6 +3320,7 @@ body {
             updateAuthUI(); // This will trigger fetchOrders if logged in
             renderVisibleWeeks();
             updateNextWeekBadge();
+            updateAlarmBell();
 
             progressMessage.textContent = 'Fertig!';
             setTimeout(() => progressModal.classList.add('hidden'), 500);
@@ -3315,6 +3478,14 @@ body {
                 badge.classList.add('has-highlights');
             }
 
+            // FR-092: Highlight Next Week Button when new data arrives
+            const storageKey = `kantine_notified_nextweek_${nextYear}_${nextWeek}`;
+            if (!localStorage.getItem(storageKey)) {
+                localStorage.setItem(storageKey, 'true');
+                btnNextWeek.classList.add('new-week-available');
+                showToast('Neue Menüdaten für nächste Woche verfügbar!', 'info');
+            }
+
         } else if (badge) {
             badge.remove();
         }
@@ -3721,7 +3892,7 @@ body {
 
     // Periodic update check (runs on init + every hour)
     async function checkForUpdates() {
-        const currentVersion = 'v1.4.2';
+        const currentVersion = 'v1.4.7';
         const devMode = localStorage.getItem('kantine_dev_mode') === 'true';
 
         try {
@@ -3762,7 +3933,7 @@ body {
         const modal = document.getElementById('version-modal');
         const container = document.getElementById('version-list-container');
         const devToggle = document.getElementById('dev-mode-toggle');
-        const currentVersion = 'v1.4.2';
+        const currentVersion = 'v1.4.7';
 
         if (!modal) return;
         modal.classList.remove('hidden');

kantine.js

@@ -74,6 +74,13 @@
                             <h1>Kantinen Übersicht <small class="version-tag" style="font-size: 0.6em; opacity: 0.7; font-weight: 400; cursor: pointer;" title="Klick für Versionsmenü">{{VERSION}}</small></h1>
                             <div id="last-updated-subtitle" class="subtitle"></div>
                         </div>
+                        <div class="nav-group" style="margin-left: 1rem;">
+                            <button id="btn-this-week" class="nav-btn active">Diese Woche</button>
+                            <button id="btn-next-week" class="nav-btn">Nächste Woche</button>
+                        </div>
+                        <button id="alarm-bell" class="icon-btn hidden" aria-label="Benachrichtigungen" title="Keine beobachteten Menüs" style="margin-left: -0.5rem;">
+                            <span class="material-icons-round" id="alarm-bell-icon" style="color:var(--text-secondary); transition: color 0.3s;">notifications</span>
+                        </button>
                     </div>
                     <div class="header-center-wrapper">
                         <div id="header-week-info" class="header-week-info"></div>
@@ -89,10 +96,6 @@
                         <button id="btn-highlights" class="icon-btn" aria-label="Persönliche Highlights verwalten" title="Persönliche Highlights verwalten">
                             <span class="material-icons-round">label</span>
                         </button>
-                        <div class="nav-group">
-                            <button id="btn-this-week" class="nav-btn active">Diese Woche</button>
-                            <button id="btn-next-week" class="nav-btn">Nächste Woche</button>
-                        </div>
                         <button id="theme-toggle" class="icon-btn" aria-label="Toggle Theme">
                             <span class="material-icons-round theme-icon">light_mode</span>
                         </button>
@@ -218,9 +221,17 @@
                                 <span>Dev-Mode (alle Tags anzeigen)</span>
                             </label>
                         </div>
-                        <div id="version-list-container" style="margin-top:1rem;">
+                        <div id="version-list-container" style="margin-top:1rem; max-height: 250px; overflow-y: auto;">
                             <p style="color:var(--text-secondary);">Lade Versionen...</p>
                         </div>
+                        <div style="margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--border-color); display: flex; flex-direction: column; gap: 0.75rem; font-size: 0.9em;">
+                            <a href="https://github.com/TauNeutrino/kantine-overview/issues" target="_blank" rel="noopener noreferrer" style="color: var(--primary-color); text-decoration: none; display: flex; align-items: center; gap: 0.5rem;" title="Melde einen Fehler auf GitHub">
+                                <span class="material-icons-round" style="font-size: 1.2em;">bug_report</span> Fehler melden
+                            </a>
+                            <a href="https://github.com/TauNeutrino/kantine-overview/discussions/categories/ideas" target="_blank" rel="noopener noreferrer" style="color: var(--primary-color); text-decoration: none; display: flex; align-items: center; gap: 0.5rem;" title="Schlage ein neues Feature auf GitHub vor">
+                                <span class="material-icons-round" style="font-size: 1.2em;">lightbulb</span> Feature vorschlagen
+                            </a>
+                        </div>
                     </div>
                 </div>
             </div>
@@ -354,6 +365,7 @@
         });
 
         btnNextWeek.addEventListener('click', () => {
+            btnNextWeek.classList.remove('new-week-available');
             if (displayMode !== 'next-week') {
                 displayMode = 'next-week';
                 btnNextWeek.classList.add('active');
@@ -558,24 +570,49 @@
         const progressFill = document.getElementById('history-progress-fill');
         const progressText = document.getElementById('history-progress-text');
 
+        // Check local storage cache (we still use memory cache if available)
+        let localCache = [];
         if (fullOrderHistoryCache) {
-            renderHistory(fullOrderHistoryCache);
-            return;
+            localCache = fullOrderHistoryCache;
+        } else {
+            const ls = localStorage.getItem('kantine_history_cache');
+            if (ls) {
+                try {
+                    localCache = JSON.parse(ls);
+                    fullOrderHistoryCache = localCache;
+                } catch (e) {
+                    console.warn('History cache parse error', e);
+                }
+            }
+        }
+
+        // Show cached version immediately if we have one
+        if (localCache.length > 0) {
+            renderHistory(localCache);
         }
 
         if (!authToken) return;
 
-        historyContent.innerHTML = '';
-        historyLoading.classList.remove('hidden');
-        progressFill.style.width = '0%';
-        progressText.textContent = 'Lade Bestellhistorie...';
+        // Start background delta sync
+        if (localCache.length === 0) {
+            historyContent.innerHTML = '';
+            historyLoading.classList.remove('hidden');
+        }
 
-        let nextUrl = `${API_BASE}/user/orders/?venue=${VENUE_ID}&ordering=-created&limit=50`;
-        let allOrders = [];
+        progressFill.style.width = '0%';
+        progressText.textContent = localCache.length > 0 ? 'Suche nach neuen Bestellungen...' : 'Lade Bestellhistorie...';
+        if (localCache.length > 0) historyLoading.classList.remove('hidden');
+
+        let nextUrl = localCache.length > 0
+            ? `${API_BASE}/user/orders/?venue=${VENUE_ID}&ordering=-created&limit=5`
+            : `${API_BASE}/user/orders/?venue=${VENUE_ID}&ordering=-created&limit=50`;
+        let fetchedOrders = [];
         let totalCount = 0;
+        let requiresFullFetch = localCache.length === 0;
+        let deltaComplete = false;
 
         try {
-            while (nextUrl) {
+            while (nextUrl && !deltaComplete) {
                 const response = await fetch(nextUrl, { headers: apiHeaders(authToken) });
                 if (!response.ok) throw new Error(`Fetch failed: ${response.status}`);
 
@@ -585,26 +622,75 @@
                     totalCount = data.count;
                 }
 
-                allOrders = allOrders.concat(data.results || []);
+                const results = data.results || [];
 
-                // Update progress
-                if (totalCount > 0) {
-                    const pct = Math.round((allOrders.length / totalCount) * 100);
-                    progressFill.style.width = `${pct}%`;
-                    progressText.textContent = `Lade Bestellung ${allOrders.length} von ${totalCount}...`;
-                } else {
-                    progressText.textContent = `Lade Bestellung ${allOrders.length}...`;
+                for (const order of results) {
+                    // Check if we hit an order that is already in our cache AND has the exact same state/update time
+                    // Bessa returns 'updated' timestamp, we can use it to determine if anything changed
+                    const existingOrderIndex = localCache.findIndex(cached => cached.id === order.id);
+
+                    if (!requiresFullFetch && existingOrderIndex !== -1) {
+                        const existingOrder = localCache[existingOrderIndex];
+                        // If order exists and wasn't updated since our cache, we've reached the point 
+                        // where everything older is already correctly cached.
+                        // order.updated is an ISO string like "2025-02-18T10:30:15.123456Z"
+                        if (existingOrder.updated === order.updated && existingOrder.order_state === order.order_state) {
+                            deltaComplete = true;
+                            break;
+                        }
+                    }
+                    fetchedOrders.push(order);
                 }
 
-                nextUrl = data.next;
+                // Update progress
+                if (!deltaComplete && requiresFullFetch) {
+                    if (totalCount > 0) {
+                        const pct = Math.round((fetchedOrders.length / totalCount) * 100);
+                        progressFill.style.width = `${pct}%`;
+                        progressText.textContent = `Lade Bestellung ${fetchedOrders.length} von ${totalCount}...`;
+                    } else {
+                        progressText.textContent = `Lade Bestellung ${fetchedOrders.length}...`;
+                    }
+                } else if (!deltaComplete) {
+                    progressText.textContent = `${fetchedOrders.length} neue/geänderte Bestellungen gefunden...`;
+                }
+
+                nextUrl = deltaComplete ? null : data.next;
             }
 
-            fullOrderHistoryCache = allOrders;
-            renderHistory(fullOrderHistoryCache);
+            // Merge fetched orders with cache
+            if (fetchedOrders.length > 0) {
+                // We have new/updated orders. We need to merge them into the cache.
+                // 1. Create a map of the existing cache for quick ID lookup
+                const cacheMap = new Map(localCache.map(o => [o.id, o]));
+
+                // 2. Update/Insert the newly fetched orders
+                for (const order of fetchedOrders) {
+                    cacheMap.set(order.id, order); // Overwrites existing, or adds new
+                }
+
+                // 3. Convert back to array and sort by created date (descending)
+                const mergedOrders = Array.from(cacheMap.values());
+                mergedOrders.sort((a, b) => new Date(b.created) - new Date(a.created));
+
+                fullOrderHistoryCache = mergedOrders;
+                try {
+                    localStorage.setItem('kantine_history_cache', JSON.stringify(mergedOrders));
+                } catch (e) {
+                    console.warn('History cache write error', e);
+                }
+
+                // Render the updated history
+                renderHistory(fullOrderHistoryCache);
+            }
 
         } catch (error) {
-            console.error('Error fetching full history:', error);
-            historyContent.innerHTML = `<p style="color:var(--error-color);text-align:center;">Fehler beim Laden der Historie.</p>`;
+            console.error('Error in history sync:', error);
+            if (localCache.length === 0) {
+                historyContent.innerHTML = `<p style="color:var(--error-color);text-align:center;">Fehler beim Laden der Historie.</p>`;
+            } else {
+                showToast('Hintergrund-Synchronisation fehlgeschlagen', 'error');
+            }
         } finally {
             historyLoading.classList.add('hidden');
         }
@@ -806,6 +892,7 @@
 
             if (response.ok || response.status === 201) {
                 showToast(`Bestellt: ${name}`, 'success');
+                fullOrderHistoryCache = null; // Clear memory cache so next history open triggers delta sync
                 await fetchOrders();
             } else {
                 const data = await response.json();
@@ -835,6 +922,7 @@
 
             if (response.ok) {
                 showToast(`Storniert: ${name}`, 'success');
+                fullOrderHistoryCache = null; // Clear memory cache so next history open triggers delta sync
                 await fetchOrders();
             } else {
                 const data = await response.json();
@@ -851,6 +939,55 @@
         localStorage.setItem('kantine_flags', JSON.stringify([...userFlags]));
     }
 
+    function updateAlarmBell() {
+        const bellBtn = document.getElementById('alarm-bell');
+        const bellIcon = document.getElementById('alarm-bell-icon');
+        if (!bellBtn || !bellIcon) return;
+
+        if (userFlags.size === 0) {
+            bellBtn.classList.add('hidden');
+            return;
+        }
+
+        bellBtn.classList.remove('hidden');
+
+        // Check if any flagged item is available
+        let anyAvailable = false;
+        for (const wk of allWeeks) {
+            if (!wk.days) continue;
+            for (const d of wk.days) {
+                if (!d.items) continue;
+                for (const item of d.items) {
+                    if (item.available && userFlags.has(item.id)) {
+                        anyAvailable = true;
+                        break;
+                    }
+                }
+                if (anyAvailable) break;
+            }
+            if (anyAvailable) break;
+        }
+
+        const lastUpdatedStr = localStorage.getItem('kantine_last_updated');
+        let timeStr = 'Unbekannt';
+        if (lastUpdatedStr) {
+            const lastUpdated = new Date(lastUpdatedStr);
+            const diffMs = Date.now() - lastUpdated.getTime();
+            const diffMins = Math.floor(diffMs / 60000);
+            if (diffMins < 60) timeStr = `vor ${diffMins} Min.`;
+            else timeStr = `vor ${Math.floor(diffMins / 60)} Std.`;
+        }
+        bellBtn.title = `Zuletzt geprüft: ${timeStr}`;
+
+        if (anyAvailable) {
+            bellIcon.style.color = 'var(--warning-color)';
+            bellIcon.style.textShadow = '0 0 10px rgba(245, 158, 11, 0.4)';
+        } else {
+            bellIcon.style.color = 'var(--text-secondary)';
+            bellIcon.style.textShadow = 'none';
+        }
+    }
+
     function toggleFlag(date, articleId, name, cutoff) {
         const id = `${date}_${articleId}`;
         if (userFlags.has(id)) {
@@ -864,6 +1001,7 @@
             }
         }
         saveFlags();
+        updateAlarmBell();
         renderVisibleWeeks();
     }
 
@@ -1232,6 +1370,7 @@
             updateAuthUI(); // This will trigger fetchOrders if logged in
             renderVisibleWeeks();
             updateNextWeekBadge();
+            updateAlarmBell();
 
             progressMessage.textContent = 'Fertig!';
             setTimeout(() => progressModal.classList.add('hidden'), 500);
@@ -1389,6 +1528,14 @@
                 badge.classList.add('has-highlights');
             }
 
+            // FR-092: Highlight Next Week Button when new data arrives
+            const storageKey = `kantine_notified_nextweek_${nextYear}_${nextWeek}`;
+            if (!localStorage.getItem(storageKey)) {
+                localStorage.setItem(storageKey, 'true');
+                btnNextWeek.classList.add('new-week-available');
+                showToast('Neue Menüdaten für nächste Woche verfügbar!', 'info');
+            }
+
         } else if (badge) {
             badge.remove();
         }

style.css

@@ -186,6 +186,32 @@ body {
     color: white;
 }
 
+/* Notification state for Next Week */
+.nav-btn.new-week-available {
+    animation: goldPulse 2s infinite;
+    border-color: #f59e0b;
+    color: var(--accent-color);
+}
+
+.nav-btn.new-week-available.active {
+    color: white;
+}
+
+@keyframes goldPulse {
+    0% {
+        box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.7);
+    }
+
+    70% {
+        box-shadow: 0 0 0 10px rgba(245, 158, 11, 0);
+    }
+
+    100% {
+        box-shadow: 0 0 0 0 rgba(245, 158, 11, 0);
+    }
+}
+
+
 /* Badge for nav buttons (day count indicator) */
 .nav-badge {
     background-color: var(--error-color);
@@ -775,7 +801,7 @@ body {
     /* No opacity/filter here - fully visible */
     background: var(--bg-card);
     box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
-    border: 1px solid var(--accent-color);
+    border: 1px solid #8b5cf6;
     border-radius: 8px;
     padding: 1rem;
     margin: 0 -1rem 1.5rem -1rem;
@@ -784,7 +810,7 @@ body {
 }
 
 .menu-item.today-ordered {
-    border: 2px solid var(--accent-color);
+    border: 2px solid #8b5cf6;
     box-shadow: 0 0 20px rgba(139, 92, 246, 0.4);
     border-radius: 8px;
     padding: 1rem;
@@ -1595,8 +1621,6 @@ body {
 .version-list {
     list-style: none;
     padding: 0;
-    max-height: 350px;
-    overflow-y: auto;
     margin: 0;
 }
 

test_logic.js

@@ -108,7 +108,8 @@ try {
         [/function\s+isNewer/, 'isNewer function'],
         [/function\s+openVersionMenu/, 'openVersionMenu function'],
         [/kantine_dev_mode/, 'dev-mode localStorage key'],
-        [/function\s+isCacheFresh/, 'isCacheFresh function']
+        [/function\s+isCacheFresh/, 'isCacheFresh function'],
+        [/limit=5/, 'Delta fetch limit parameter']
     ];
 
     for (const [regex, label] of checks) {

version.txt

@@ -1 +1 @@
-v1.4.2
+v1.4.7