fix(back-end): file error handling

frontend/src/app/features/calculator/calculator-page.component.html

@@ -3,9 +3,9 @@
   <p class="subtitle">{{ 'CALC.SUBTITLE' | translate }}</p>
 
   @if (error() === 'VIRUS_DETECTED') {
-    <app-alert type="error">{{ 'CALC.ERROR_VIRUS' | translate }}</app-alert>
+    <app-alert type="error">{{ 'CALC.ERROR_VIRUS_DETECTED' | translate }}</app-alert>
   } @else if (error()) {
-    <app-alert type="error">{{ 'CALC.ERROR_GENERIC' | translate }}</app-alert>
+    <app-alert type="error">{{ 'CALC.ERROR_' + error() | translate }}</app-alert>
   }
 </div>
 

frontend/src/assets/i18n/en.json

@@ -61,7 +61,7 @@
     "ORDER": "Order Now",
     "CONSULT": "Request Consultation",
     "ERROR_GENERIC": "An error occurred while calculating the quote.",
-    "ERROR_UPLOAD_FAILED": "Calculation failed",
+    "ERROR_UPLOAD_FAILED": "File upload failed. Please try again.",
     "ERROR_VIRUS_DETECTED": "File removed (virus detected)",
     "ERROR_SLICING_FAILED": "Slicing error (complex geometry?)",
     "NEW_QUOTE": "Calculate New Quote",

frontend/src/assets/i18n/it.json

@@ -40,7 +40,7 @@
     "ORDER": "Ordina Ora",
     "CONSULT": "Richiedi Consulenza",
     "ERROR_GENERIC": "Si è verificato un errore durante il calcolo del preventivo.",
-    "ERROR_UPLOAD_FAILED": "Calcolo fallito",
+    "ERROR_UPLOAD_FAILED": "Caricamento file fallito. Riprova.",
     "ERROR_VIRUS_DETECTED": "File rimosso (virus rilevato)",
     "ERROR_SLICING_FAILED": "Errore slicing (geometria complessa?)",
     "NEW_QUOTE": "Calcola Nuovo Preventivo",