feat: add separate unpaid and paid bill totals to location cards

- Display both unpaid and paid bill amounts in LocationCard and MonthCard
- Rename variables for clarity: totalUnpaid, totalPayed, unpaidTotal, payedTotal
- ViewLocationCard uses totalAmount for tenant bills (regardless of payment status)
- Update Croatian translations: "Ukupno neplaćeno" (unpaid), "Ukupno plaćeno" (paid)
- Add ShoppingCartIcon for unpaid amounts, BanknotesIcon for paid amounts
- Update HomePage to calculate and pass both totals to month cards

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

app/ui/HomePage.tsx

@@ -51,7 +51,8 @@ export const HomePage:FC<HomePageProps> = async ({ searchParams }) => {
         [key]: {
           yearMonth: location.yearMonth,
           locations: [...locationsInMonth.locations, location],
-          monthlyExpense: locationsInMonth.monthlyExpense + location.bills.reduce((acc, bill) => bill.paid ? acc + (bill.payedAmount ?? 0) : acc, 0)
+          unpaidTotal: locationsInMonth.unpaidTotal + location.bills.reduce((acc, bill) => !bill.paid ? acc + (bill.payedAmount ?? 0) : acc, 0),
+          payedTotal: locationsInMonth.payedTotal + location.bills.reduce((acc, bill) => bill.paid ? acc + (bill.payedAmount ?? 0) : acc, 0)
         }
       })
     }
@@ -61,13 +62,15 @@ export const HomePage:FC<HomePageProps> = async ({ searchParams }) => {
       [key]: {
         yearMonth: location.yearMonth,
         locations: [location],
-        monthlyExpense: location.bills.reduce((acc, bill) => bill.paid ? acc + (bill.payedAmount ?? 0) : acc, 0)
+        unpaidTotal: location.bills.reduce((acc, bill) => !bill.paid ? acc + (bill.payedAmount ?? 0) : acc, 0),
+        payedTotal: location.bills.reduce((acc, bill) => bill.paid ? acc + (bill.payedAmount ?? 0) : acc, 0)
       }
     });
   }, {} as {[key:string]:{
     yearMonth: YearMonth,
     locations: BillingLocation[],
-    monthlyExpense: number
+    unpaidTotal: number,
+    payedTotal: number
   } });
 
  return (