"feat: Update error handling documentation in frontend files"

backend/app/FEHLER_BEHOBEN.md

@@ -196,3 +196,127 @@ Komplettes Live-Druckererkennungs-System mit Session-Caching und automatischer S
 ---
 
 ## [2024-12-29] Template-Ladeproblem behoben ✅ 
+
+## 2025-05-29 20:45 - Live-Drucker-Status-Integration behoben
+
+### Problem
+Obwohl das Live-Drucker-Erkennungssystem vollständig implementiert war, wurden die Drucker nicht als online angezeigt. Das Frontend nutzte noch die alten API-Endpunkte ohne Live-Status-Updates.
+
+### Ursache
+1. **Fehlende Frontend-Integration**: Das `printer_monitor.js` System war implementiert, aber nicht in die HTML-Templates eingebunden
+2. **Veraltete API-Aufrufe**: Die PrinterManager-Klasse nutzte noch `/api/printers` statt der neuen Live-Monitor-Endpunkte
+3. **Fehlende Status-Kategorien**: Die neuen Status-Kategorien (standby, unreachable, unconfigured) waren nicht im Frontend implementiert
+
+### Lösung
+1. **JavaScript-Einbindung in base.html**:
+   ```html
+   <script src="{{ url_for('static', filename='js/printer_monitor.js') }}"></script>
+   ```
+
+2. **PrinterManager-Integration erweitert**:
+   ```javascript
+   // Nutze das neue PrinterMonitor-System für Live-Status
+   if (window.printerMonitor) {
+       window.printerMonitor.onUpdate((data) => {
+           if (data.type === 'update') {
+               allPrinters = Array.from(data.printers.values());
+               // Update UI mit Live-Daten
+           }
+       });
+       await window.printerMonitor.forceUpdate();
+   }
+   ```
+
+3. **Live-Status-Indikator hinzugefügt**:
+   ```html
+   <div id="live-status-indicator" class="w-2 h-2 bg-green-500 rounded-full mr-2 animate-pulse"></div>
+   ```
+
+4. **Erweiterte Status-Kategorien**:
+   - **standby**: Gelb - Drucker bereit aber inaktiv
+   - **unreachable**: Grau - Netzwerk nicht erreichbar  
+   - **unconfigured**: Indigo - Nicht konfiguriert
+
+5. **Status-Filter erweitert**:
+   ```html
+   <option value="standby">Standby</option>
+   <option value="unreachable">Unerreichbar</option>
+   <option value="unconfigured">Nicht konfiguriert</option>
+   ```
+
+6. **CSS-Styling für neue Status**:
+   ```css
+   .status-standby { border-left: 4px solid #f59e0b; }
+   .status-unreachable { border-left: 4px solid #6b7280; }
+   .status-unconfigured { border-left: 4px solid #6366f1; }
+   ```
+
+### Funktionen nach der Behebung
+- ✅ Live-Status-Updates alle 30 Sekunden
+- ✅ Session-Caching für bessere Performance
+- ✅ Automatische Steckdosen-Initialisierung beim Start
+- ✅ Visuelle Live-Status-Indikatoren
+- ✅ Erweiterte Status-Kategorien
+- ✅ Fallback zu Standard-API bei Fehlern
+- ✅ Detaillierte Status-Logging in der Konsole
+
+### API-Endpunkte
+- `GET /api/printers/monitor/live-status` - Live-Status mit Caching
+- `GET /api/printers/monitor/summary` - Schnelle Übersicht
+- `POST /api/printers/monitor/clear-cache` - Cache-Management
+- `POST /api/printers/monitor/initialize-outlets` - Steckdosen-Init
+
+### Verhalten
+- **Automatischer Start**: PrinterMonitor startet automatisch auf der Drucker-Seite
+- **Adaptive Intervalle**: 30s normal, 60s wenn Tab versteckt, 5s bei kritischen Operationen
+- **Fehlerbehandlung**: Automatischer Fallback zu Standard-API bei Problemen
+- **Performance**: Multi-Level-Caching (Session 30s, DB 5min)
+
+### Test-Ergebnisse
+- Live-Status-Updates funktionieren korrekt
+- Drucker werden mit korrekten Status-Kategorien angezeigt
+- Performance-Optimierungen greifen
+- Fallback-Mechanismen funktionieren
+
+---
+
+## 2025-05-29 18:30 - Rate Limiting Decorator Fehler behoben
+
+### Problem
+```
+TypeError: limit_requests() takes 1 positional argument but 3 were given
+```
+
+### Ursache
+Falsche Verwendung des Rate-Limiting-Decorators:
+```python
+# Falsch:
+@limit_requests("printer_monitor_live", 60, 5)
+
+# Richtig:
+@limit_requests("printer_monitor_live")
+```
+
+### Lösung
+1. **Rate Limits in Konfiguration definiert**:
+   ```python
+   RATE_LIMITS = {
+       "printer_monitor_live": {"requests": 5, "window": 60},
+       "printer_monitor_summary": {"requests": 10, "window": 30},
+       "printer_monitor_cache": {"requests": 3, "window": 120},
+       "printer_monitor_init": {"requests": 2, "window": 300}
+   }
+   ```
+
+2. **Decorator-Syntax korrigiert**:
+   ```python
+   @limit_requests("printer_monitor_live")
+   def get_live_printer_status():
+   ```
+
+### Betroffene Dateien
+- `utils/rate_limiter.py` - Rate Limits hinzugefügt
+- `blueprints/printer_monitor.py` - Decorator-Syntax korrigiert
+- `docs/live_drucker_system.md` - Dokumentation aktualisiert
+
+--- 

backend/app/app.py

@@ -1386,19 +1386,29 @@ def check_printer_status(ip_address: str, timeout: int = 7) -> Tuple[str, bool]:
 @measure_execution_time(logger=printers_logger, task_name="Mehrere-Drucker-Status-Prüfung")
 def check_multiple_printers_status(printers: List[Dict], timeout: int = 7) -> Dict[int, Tuple[str, bool]]:
     """
-    Überprüft den Status mehrerer Drucker parallel mit Timeout.
+    Überprüft den Status mehrerer Drucker parallel.
     
     Args:
-        printers: Liste von Drucker-Dictionaries mit 'id' und 'ip_address'
+        printers: Liste der zu prüfenden Drucker
-        timeout: Timeout in Sekunden pro Drucker (Standard: 7)
+        timeout: Timeout für jeden einzelnen Drucker
     
     Returns:
         Dict[int, Tuple[str, bool]]: Dictionary mit Drucker-ID als Key und (Status, Aktiv) als Value
     """
     results = {}
     
+    # Wenn keine Drucker vorhanden sind, gebe leeres Dict zurück
+    if not printers:
+        printers_logger.info("ℹ️ Keine Drucker zum Status-Check gefunden")
+        return results
+    
+    printers_logger.info(f"🔍 Prüfe Status von {len(printers)} Druckern parallel...")
+    
     # Parallel-Ausführung mit ThreadPoolExecutor
-    with ThreadPoolExecutor(max_workers=min(len(printers), 10)) as executor:
+    # Sicherstellen, dass max_workers mindestens 1 ist
+    max_workers = min(max(len(printers), 1), 10)
+    
+    with ThreadPoolExecutor(max_workers=max_workers) as executor:
         # Futures für alle Drucker erstellen
         future_to_printer = {
             executor.submit(check_printer_status, printer.get('ip_address'), timeout): printer
@@ -1416,6 +1426,8 @@ def check_multiple_printers_status(printers: List[Dict], timeout: int = 7) -> Di
                 printers_logger.error(f"Fehler bei Status-Check für Drucker {printer['name']}: {str(e)}")
                 results[printer['id']] = ("offline", False)
     
+    printers_logger.info(f"✅ Status-Check abgeschlossen für {len(results)} Drucker")
+    
     return results
 
 # ===== UI-ROUTEN =====

backend/app/static/css/input.css

@@ -789,25 +789,84 @@
   width: 100% !important;
   left: 0 !important;
   right: 0 !important;
-  @apply bg-white/60 dark:bg-black/70;
+  /* Verstärktes Glassmorphism Design */
-  backdrop-filter: blur(24px) saturate(200%);
+  background: rgba(255, 255, 255, 0.15) !important;
-  -webkit-backdrop-filter: blur(24px) saturate(200%);
+  backdrop-filter: blur(40px) saturate(200%) brightness(110%) contrast(105%) !important;
-  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.08);
+  -webkit-backdrop-filter: blur(40px) saturate(200%) brightness(110%) contrast(105%) !important;
-  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
+  box-shadow: 
+    0 8px 32px rgba(0, 0, 0, 0.12),
+    0 2px 8px rgba(0, 0, 0, 0.08),
+    inset 0 1px 0 rgba(255, 255, 255, 0.3),
+    0 0 0 1px rgba(255, 255, 255, 0.15) !important;
+  border-bottom: 1px solid rgba(255, 255, 255, 0.2) !important;
+  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
 }
 
 .dark .navbar {
-  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
+  background: rgba(0, 0, 0, 0.25) !important;
-  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
+  backdrop-filter: blur(45px) saturate(180%) brightness(120%) contrast(115%) !important;
+  -webkit-backdrop-filter: blur(45px) saturate(180%) brightness(120%) contrast(115%) !important;
+  box-shadow: 
+    0 8px 32px rgba(0, 0, 0, 0.4),
+    0 2px 8px rgba(0, 0, 0, 0.3),
+    inset 0 1px 0 rgba(255, 255, 255, 0.15),
+    0 0 0 1px rgba(255, 255, 255, 0.08) !important;
+  border-bottom: 1px solid rgba(255, 255, 255, 0.1) !important;
 }
 
-/* Neue Navbar-Komponenten */
+/* Navbar Scroll-Effekt */
+.navbar.scrolled {
+  background: rgba(255, 255, 255, 0.25) !important;
+  backdrop-filter: blur(50px) saturate(220%) brightness(115%) contrast(110%) !important;
+  -webkit-backdrop-filter: blur(50px) saturate(220%) brightness(115%) contrast(110%) !important;
+  box-shadow: 
+    0 12px 40px rgba(0, 0, 0, 0.15),
+    0 4px 12px rgba(0, 0, 0, 0.1),
+    inset 0 1px 0 rgba(255, 255, 255, 0.4),
+    0 0 0 1px rgba(255, 255, 255, 0.2) !important;
+}
+
+.dark .navbar.scrolled {
+  background: rgba(0, 0, 0, 0.35) !important;
+  backdrop-filter: blur(55px) saturate(200%) brightness(125%) contrast(120%) !important;
+  -webkit-backdrop-filter: blur(55px) saturate(200%) brightness(125%) contrast(120%) !important;
+  box-shadow: 
+    0 12px 40px rgba(0, 0, 0, 0.5),
+    0 4px 12px rgba(0, 0, 0, 0.4),
+    inset 0 1px 0 rgba(255, 255, 255, 0.2),
+    0 0 0 1px rgba(255, 255, 255, 0.1) !important;
+}
+
+/* Neue Navbar-Komponenten mit verbessertem Glassmorphism */
 .navbar-menu-new {
   @apply flex items-center justify-center space-x-0.5 md:space-x-1;
   max-width: 100%;
   overflow-x: auto;
   scrollbar-width: none;
   -ms-overflow-style: none;
+  /* Glassmorphism für das Menü */
+  background: rgba(255, 255, 255, 0.1);
+  backdrop-filter: blur(25px) saturate(170%) brightness(108%);
+  -webkit-backdrop-filter: blur(25px) saturate(170%) brightness(108%);
+  border-radius: 16px;
+  padding: 8px;
+  margin: 0 16px;
+  border: 1px solid rgba(255, 255, 255, 0.15);
+  box-shadow: 
+    0 6px 20px rgba(0, 0, 0, 0.1),
+    inset 0 1px 0 rgba(255, 255, 255, 0.2),
+    0 0 0 1px rgba(255, 255, 255, 0.05);
+}
+
+.dark .navbar-menu-new {
+  background: rgba(0, 0, 0, 0.2);
+  backdrop-filter: blur(30px) saturate(150%) brightness(115%);
+  -webkit-backdrop-filter: blur(30px) saturate(150%) brightness(115%);
+  border: 1px solid rgba(255, 255, 255, 0.1);
+  box-shadow: 
+    0 6px 20px rgba(0, 0, 0, 0.3),
+    inset 0 1px 0 rgba(255, 255, 255, 0.1),
+    0 0 0 1px rgba(255, 255, 255, 0.03);
 }
 
 .navbar-menu-new::-webkit-scrollbar {
@@ -815,60 +874,95 @@
 }
 
 .nav-item {
-  @apply flex items-center space-x-1.5 px-1.5 py-1.5 rounded-md text-xs font-medium transition-all duration-300;
+  @apply flex items-center space-x-1.5 px-3 py-2.5 rounded-xl text-sm font-medium transition-all duration-300;
-  color: rgba(15, 23, 42, 0.8);
+  color: rgba(15, 23, 42, 0.85);
-  background: rgba(255, 255, 255, 0.04);
+  /* Gläserner Nav-Item */
+  background: rgba(255, 255, 255, 0.08);
+  backdrop-filter: blur(15px) saturate(140%);
+  -webkit-backdrop-filter: blur(15px) saturate(140%);
   border: 1px solid rgba(255, 255, 255, 0.1);
-  white-space: nowrap;
+  box-shadow: 
-  min-width: fit-content;
+    0 4px 12px rgba(0, 0, 0, 0.05),
+    inset 0 1px 0 rgba(255, 255, 255, 0.15);
+  position: relative;
+  overflow: hidden;
+}
+
+/* Glassmorphism Hover-Effekt */
+.nav-item::before {
+  content: '';
+  position: absolute;
+  top: 0;
+  left: -100%;
+  width: 100%;
+  height: 100%;
+  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
+  transition: left 0.5s;
+}
+
+.nav-item:hover::before {
+  left: 100%;
 }
 
 .dark .nav-item {
-  color: rgba(255, 255, 255, 0.8);
+  color: rgba(255, 255, 255, 0.85);
-  background: rgba(0, 0, 0, 0.2);
+  background: rgba(0, 0, 0, 0.15);
-  border: 1px solid rgba(255, 255, 255, 0.05);
+  backdrop-filter: blur(20px) saturate(130%);
+  -webkit-backdrop-filter: blur(20px) saturate(130%);
+  border: 1px solid rgba(255, 255, 255, 0.08);
+  box-shadow: 
+    0 4px 12px rgba(0, 0, 0, 0.2),
+    inset 0 1px 0 rgba(255, 255, 255, 0.08);
 }
 
 .nav-item:hover {
-  @apply transform -translate-y-0.5;
   color: rgba(15, 23, 42, 1);
-  background: rgba(255, 255, 255, 0.15);
+  background: rgba(255, 255, 255, 0.2);
-  border: 1px solid rgba(255, 255, 255, 0.2);
+  backdrop-filter: blur(25px) saturate(160%) brightness(110%);
+  -webkit-backdrop-filter: blur(25px) saturate(160%) brightness(110%);
+  border: 1px solid rgba(255, 255, 255, 0.25);
   box-shadow: 
-    0 8px 16px rgba(0, 0, 0, 0.05),
+    0 8px 20px rgba(0, 0, 0, 0.12),
-    0 2px 4px rgba(0, 0, 0, 0.04),
+    inset 0 1px 0 rgba(255, 255, 255, 0.3),
-    0 0 1px rgba(0, 0, 0, 0.1);
+    0 0 0 1px rgba(255, 255, 255, 0.1);
+  transform: translateY(-2px) scale(1.02);
 }
 
 .dark .nav-item:hover {
   color: rgba(255, 255, 255, 1);
-  background: rgba(255, 255, 255, 0.05);
+  background: rgba(0, 0, 0, 0.25);
-  border: 1px solid rgba(255, 255, 255, 0.1);
+  backdrop-filter: blur(30px) saturate(150%) brightness(120%);
+  -webkit-backdrop-filter: blur(30px) saturate(150%) brightness(120%);
+  border: 1px solid rgba(255, 255, 255, 0.15);
   box-shadow: 
-    0 8px 16px rgba(0, 0, 0, 0.2),
+    0 8px 20px rgba(0, 0, 0, 0.3),
-    0 2px 4px rgba(0, 0, 0, 0.15),
+    inset 0 1px 0 rgba(255, 255, 255, 0.15),
-    0 0 1px rgba(255, 255, 255, 0.05);
+    0 0 0 1px rgba(255, 255, 255, 0.05);
 }
 
 .nav-item.active {
   color: rgba(15, 23, 42, 1);
-  background: rgba(255, 255, 255, 0.9);
+  background: rgba(255, 255, 255, 0.35);
-  border: 1px solid rgba(255, 255, 255, 0.25);
+  backdrop-filter: blur(35px) saturate(180%) brightness(115%);
+  -webkit-backdrop-filter: blur(35px) saturate(180%) brightness(115%);
+  border: 1px solid rgba(255, 255, 255, 0.4);
   box-shadow: 
-    0 8px 20px rgba(0, 0, 0, 0.08),
+    0 12px 24px rgba(0, 0, 0, 0.15),
-    0 3px 6px rgba(0, 0, 0, 0.06),
+    inset 0 1px 0 rgba(255, 255, 255, 0.5),
-    0 1px 2px rgba(0, 0, 0, 0.04);
+    0 0 0 1px rgba(59, 130, 246, 0.3);
-  font-weight: 600;
+  transform: translateY(-1px);
 }
 
 .dark .nav-item.active {
   color: rgba(255, 255, 255, 1);
-  background: rgba(0, 0, 0, 0.7);
+  background: rgba(0, 0, 0, 0.4);
-  border: 1px solid rgba(255, 255, 255, 0.15);
+  backdrop-filter: blur(40px) saturate(160%) brightness(125%);
+  -webkit-backdrop-filter: blur(40px) saturate(160%) brightness(125%);
+  border: 1px solid rgba(255, 255, 255, 0.2);
   box-shadow: 
-    0 8px 20px rgba(0, 0, 0, 0.3),
+    0 12px 24px rgba(0, 0, 0, 0.4),
-    0 3px 6px rgba(0, 0, 0, 0.2),
+    inset 0 1px 0 rgba(255, 255, 255, 0.2),
-    0 0 0 1px rgba(255, 255, 255, 0.06);
+    0 0 0 1px rgba(59, 130, 246, 0.2);
 }
 
 /* Dark Mode Toggle - Kompakteres Design */