v0.4.6 — Crash-Fixes: ErrorBoundary + Null-Safety

- UpdatePlanEntry Signatur-Fix (4 statt 7 Params)
- undefined→null für Go-Pointer-Parameter
- Null-Safety für Go-Arrays
- ExportPDF Doppel-Deklaration entfernt
- Version auf 0.4.5

app.go

@@ -373,6 +373,20 @@ func (a *App) DownloadUpdate() (string, error) {
 	return a.updater.DownloadUpdate(*info)
 }
 
+// PDF EXPORT
+
+// ExportPDF erstellt eine PDF-Datei des Wochenplans
+// getWeekPlanByID lädt einen Wochenplan anhand seiner ID
+func (a *App) getWeekPlanByID(id int) (*WeekPlan, error) {
+	var plan WeekPlan
+	query := "SELECT id, year, week, created_at FROM week_plans WHERE id = ?"
+	err := db.Get(&plan, query, id)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get week plan by ID: %w", err)
+	}
+	return &plan, nil
+}
+
 // HILFSFUNKTIONEN
 
 // loadProductRelations lädt Allergene und Zusatzstoffe für ein Produkt

frontend/src/App.tsx

@@ -3,6 +3,7 @@ import { Layout, useSelectedWeek } from './components/Layout';
 import { WeekPlanner } from './components/WeekPlanner';
 import { ProductList } from './components/ProductList';
 import { InfoPage } from './components/InfoPage';
+import { ErrorBoundary } from './components/ErrorBoundary';
 import { useProducts } from './hooks/useProducts';
 import './styles/globals.css';
 
@@ -68,6 +69,7 @@ function ProductsPage() {
 // Main App Component
 function App() {
   return (
+    <ErrorBoundary>
     <Router>
       <div className="App min-h-screen bg-gray-50 text-contrast-aa">
         <Routes>
@@ -87,6 +89,7 @@ function App() {
         </Routes>
       </div>
     </Router>
+    </ErrorBoundary>
   );
 }
 

frontend/src/components/ErrorBoundary.tsx

@@ -0,0 +1,58 @@
+import { Component, ErrorInfo, ReactNode } from 'react';
+
+interface Props {
+  children: ReactNode;
+}
+
+interface State {
+  hasError: boolean;
+  error: Error | null;
+}
+
+export class ErrorBoundary extends Component<Props, State> {
+  constructor(props: Props) {
+    super(props);
+    this.state = { hasError: false, error: null };
+  }
+
+  static getDerivedStateFromError(error: Error): State {
+    return { hasError: true, error };
+  }
+
+  componentDidCatch(error: Error, errorInfo: ErrorInfo) {
+    console.error('ErrorBoundary caught:', error, errorInfo);
+  }
+
+  render() {
+    if (this.state.hasError) {
+      return (
+        <div className="min-h-screen flex items-center justify-center bg-gray-50 p-8">
+          <div className="text-center max-w-md">
+            <svg className="mx-auto h-16 w-16 text-red-400 mb-6" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-2.5L13.732 4c-.77-.833-1.996-.833-2.764 0L3.732 16c-.77.833.192 2.5 1.732 2.5z" />
+            </svg>
+            <h1 className="text-2xl font-bold text-gray-900 mb-2">
+              Etwas ist schiefgelaufen
+            </h1>
+            <p className="text-gray-600 mb-6">
+              Ein unerwarteter Fehler ist aufgetreten. Bitte laden Sie die Seite neu.
+            </p>
+            {this.state.error && (
+              <p className="text-sm text-red-600 mb-6 font-mono bg-red-50 p-3 rounded">
+                {this.state.error.message}
+              </p>
+            )}
+            <button
+              onClick={() => window.location.reload()}
+              className="px-6 py-3 bg-blue-600 text-white rounded-md hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 transition-colors text-lg"
+            >
+              Seite neu laden
+            </button>
+          </div>
+        </div>
+      );
+    }
+
+    return this.props.children;
+  }
+}

frontend/src/components/InfoPage.tsx

@@ -79,7 +79,7 @@ export function InfoPage() {
             <div>
               <dt className="text-sm font-medium text-gray-500">Version</dt>
               <dd className="mt-1 text-sm text-gray-900 font-mono">
-                {updateInfo?.current_version || '1.0.0'}
+                {updateInfo?.current_version || '0.4.5'}
               </dd>
             </div>
             
@@ -345,7 +345,7 @@ export function InfoPage() {
           
           <div className="text-sm text-gray-600 space-y-2">
             <p>
-              <strong>Version:</strong> 1.0.0 (Build 2026.02.20)
+              <strong>Version:</strong> 0.4.5 (Build 2026.02.20)
             </p>
             <p>
               <strong>Support:</strong> Wenden Sie sich bei Fragen oder Problemen an Ihre IT-Abteilung

frontend/src/components/WeekPlanner.tsx

@@ -85,7 +85,6 @@ export function WeekPlanner({ year, week, className = '' }: WeekPlannerProps) {
     setPdfSuccess(null);
     
     try {
-      // ExportPDF nimmt weekPlanID und outputPath - Go-Seite öffnet Save-Dialog mit leer-string
       await ExportPDF(weekPlan.id, '');
       setPdfSuccess('PDF wurde erfolgreich erstellt.');
       

frontend/src/hooks/useProducts.ts

@@ -19,7 +19,7 @@ export function useProducts() {
     
     try {
       const productList = await GetProducts();
-      setProducts(productList);
+      setProducts(productList || []);
     } catch (err) {
       setError(err instanceof Error ? err.message : 'Fehler beim Laden der Produkte');
     } finally {
@@ -35,8 +35,8 @@ export function useProducts() {
         GetAdditives()
       ]);
       
-      setAllergens(allergenList);
-      setAdditives(additiveList);
+      setAllergens(allergenList || []);
+      setAdditives(additiveList || []);
     } catch (err) {
       setError(err instanceof Error ? err.message : 'Fehler beim Laden der Stammdaten');
     }
@@ -66,7 +66,9 @@ export function useProducts() {
         data.additiveIds
       );
       
-      setProducts(prev => [...prev, newProduct]);
+      if (newProduct) {
+        setProducts(prev => [...prev, newProduct]);
+      }
       return newProduct;
     } catch (err) {
       setError(err instanceof Error ? err.message : 'Fehler beim Erstellen des Produkts');
@@ -90,7 +92,9 @@ export function useProducts() {
         data.additiveIds
       );
       
-      setProducts(prev => prev.map(p => p.id === id ? updatedProduct : p));
+      if (updatedProduct) {
+        setProducts(prev => prev.map(p => p.id === id ? updatedProduct : p));
+      }
       return updatedProduct;
     } catch (err) {
       setError(err instanceof Error ? err.message : 'Fehler beim Bearbeiten des Produkts');

frontend/src/hooks/useWeekPlan.ts

@@ -19,6 +19,11 @@ export function useWeekPlan(year: number, week: number) {
     
     try {
       const plan = await GetWeekPlan(year, week);
+      // Null-Safety: Go kann null für leere Arrays zurückgeben
+      if (plan) {
+        plan.entries = plan.entries || [];
+        plan.special_days = plan.special_days || [];
+      }
       setWeekPlan(plan);
     } catch (err) {
       setError(err instanceof Error ? err.message : 'Fehler beim Laden des Wochenplans');
@@ -35,6 +40,10 @@ export function useWeekPlan(year: number, week: number) {
     
     try {
       const newPlan = await CreateWeekPlan(year, week);
+      if (newPlan) {
+        newPlan.entries = newPlan.entries || [];
+        newPlan.special_days = newPlan.special_days || [];
+      }
       setWeekPlan(newPlan);
       return newPlan;
     } catch (err) {
@@ -52,6 +61,10 @@ export function useWeekPlan(year: number, week: number) {
     
     try {
       const copiedPlan = await CopyWeekPlan(srcYear, srcWeek, year, week);
+      if (copiedPlan) {
+        copiedPlan.entries = copiedPlan.entries || [];
+        copiedPlan.special_days = copiedPlan.special_days || [];
+      }
       setWeekPlan(copiedPlan);
       return copiedPlan;
     } catch (err) {
@@ -73,13 +86,22 @@ export function useWeekPlan(year: number, week: number) {
     if (!weekPlan) return null;
     
     try {
-      const newEntry = await AddPlanEntry(weekPlan.id, day, meal, productId, customText, groupLabel);
+      // Go erwartet null statt undefined für optionale Pointer-Parameter
+      const newEntry = await AddPlanEntry(
+        weekPlan.id, 
+        day, 
+        meal, 
+        productId ?? null, 
+        customText ?? null, 
+        groupLabel ?? null
+      );
       
-      // State aktualisieren
-      setWeekPlan(prev => prev ? {
-        ...prev,
-        entries: [...prev.entries, newEntry]
-      } : null);
+      if (newEntry) {
+        setWeekPlan(prev => prev ? {
+          ...prev,
+          entries: [...prev.entries, newEntry]
+        } : null);
+      }
       
       return newEntry;
     } catch (err) {
@@ -114,13 +136,15 @@ export function useWeekPlan(year: number, week: number) {
     groupLabel?: GroupLabel
   ): Promise<PlanEntry | null> => {
     try {
-      const updatedEntry = await UpdatePlanEntry(entryId, 0, '', 0, productId ?? null, customText ?? null, groupLabel ?? null);
+      // Go: UpdatePlanEntry(id int, productID *int, customText *string, groupLabel *string)
+      const updatedEntry = await UpdatePlanEntry(entryId, productId ?? null, customText ?? null, groupLabel ?? null);
       
-      // State aktualisieren
-      setWeekPlan(prev => prev ? {
-        ...prev,
-        entries: prev.entries.map(e => e.id === entryId ? updatedEntry : e)
-      } : null);
+      if (updatedEntry) {
+        setWeekPlan(prev => prev ? {
+          ...prev,
+          entries: prev.entries.map(e => e.id === entryId ? updatedEntry : e)
+        } : null);
+      }
       
       return updatedEntry;
     } catch (err) {

updater.go

@@ -16,7 +16,7 @@ import (
 
 const (
 	// Aktuelle Version der App
-	CurrentVersion = "1.0.0"
+	CurrentVersion = "0.4.5"
 	// Update-Check URL
 	UpdateURL = "https://speiseplan.supertoll.xyz/version.json"
 )