Implement health check service and global exception handling

frontend/app/inventory/InventoryConsumptionHistory.tsx

@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useTransition } from 'react';
+import { parseErrorResponse } from '../../lib/error-handler';
 import type { InventoryConsumption } from '../../features/inventory/types';
 
 type Props = {
@@ -28,15 +29,16 @@ export default function InventoryConsumptionHistory({ id }: Props) {
         });
 
         if (!res.ok) {
-          const text = await res.text();
-          throw new Error(text || 'Kunde inte hämta historik.');
+          const errorMessage = await parseErrorResponse(res);
+          throw new Error(errorMessage);
         }
 
         const data: InventoryConsumption[] = await res.json();
         setHistory(data);
         setIsOpen(true);
       } catch (err) {
-        setError(err instanceof Error ? err.message : 'Okänt fel');
+        const message = err instanceof Error ? err.message : 'Ett okänt fel inträffade.';
+        setError(message);
       }
     });
   };