feat: implement plant health scanning functionality with backend integration and UI support

app/scanner.tsx

@@ -14,7 +14,7 @@ import { useColors } from '../constants/Colors';
 import { PlantRecognitionService } from '../services/plantRecognitionService';
 import { IdentificationResult } from '../types';
 import { ResultCard } from '../components/ResultCard';
-import { backendApiClient, isInsufficientCreditsError, isNetworkError } from '../services/backend/backendApiClient';
+import { backendApiClient, isInsufficientCreditsError, isNetworkError, isTimeoutError } from '../services/backend/backendApiClient';
 import { isBackendApiError } from '../services/backend/contracts';
 import { createIdempotencyKey } from '../utils/idempotency';
 
@@ -33,6 +33,8 @@ const getBillingCopy = (language: 'de' | 'en' | 'es') => {
       genericErrorMessage: 'Analyse fehlgeschlagen.',
       noConnectionTitle: 'Keine Verbindung',
       noConnectionMessage: 'Keine Verbindung zum Server. Bitte prüfe deine Internetverbindung und versuche es erneut.',
+      timeoutTitle: 'Scan zu langsam',
+      timeoutMessage: 'Die Analyse hat zu lange gedauert. Bitte erneut versuchen.',
       retryLabel: 'Erneut versuchen',
       providerErrorMessage: 'KI-Scan gerade nicht verfügbar. Bitte versuche es erneut.',
       healthProviderErrorMessage: 'KI-Health-Check gerade nicht verfügbar. Bitte versuche es erneut.',
@@ -55,6 +57,8 @@ const getBillingCopy = (language: 'de' | 'en' | 'es') => {
       genericErrorMessage: 'Analisis fallido.',
       noConnectionTitle: 'Sin conexión',
       noConnectionMessage: 'Sin conexión al servidor. Comprueba tu internet e inténtalo de nuevo.',
+      timeoutTitle: 'Escaneo lento',
+      timeoutMessage: 'El análisis tardó demasiado. Inténtalo de nuevo.',
       retryLabel: 'Reintentar',
       providerErrorMessage: 'Escaneo IA no disponible ahora. Inténtalo de nuevo.',
       healthProviderErrorMessage: 'Health-check IA no disponible ahora. Inténtalo de nuevo.',
@@ -76,6 +80,8 @@ const getBillingCopy = (language: 'de' | 'en' | 'es') => {
     genericErrorMessage: 'Analysis failed.',
     noConnectionTitle: 'No connection',
     noConnectionMessage: 'Could not reach the server. Check your internet connection and try again.',
+    timeoutTitle: 'Scan Too Slow',
+    timeoutMessage: 'Analysis took too long. Please try again.',
     retryLabel: 'Try again',
     providerErrorMessage: 'AI scan is currently unavailable. Please try again.',
     healthProviderErrorMessage: 'AI health check is currently unavailable. Please try again.',
@@ -295,6 +301,15 @@ export default function ScannerScreen() {
             },
           ],
         );
+      } else if (isTimeoutError(error)) {
+        Alert.alert(
+          billingCopy.timeoutTitle,
+          billingCopy.timeoutMessage,
+          [
+            { text: billingCopy.dismiss, style: 'cancel' },
+            { text: billingCopy.retryLabel, onPress: () => analyzeImage(imageUri, galleryImageUri) },
+          ],
+        );
       } else if (isNetworkError(error)) {
         Alert.alert(
           billingCopy.noConnectionTitle,