Filter bills display to show only billedToTenant bills

Updated all components to respect the billedToTenant flag:

- LocationCard: Filter bills display and monthlyExpense calculation
- ViewLocationCard: Filter bills display and monthlyExpense calculation
- HomePage: Update monthlyExpense calculations for month grouping
- printActions: Filter barcode print data to only include tenant bills

All filtering uses (bill.billedToTenant ?? true) for backward
compatibility with existing bills that don't have this property set.

This ensures users only see and calculate expenses for bills that
are the tenant's responsibility.

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

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

app/ui/LocationCard.tsx

@@ -19,8 +19,8 @@ export const LocationCard:FC<LocationCardProps> = ({location: { _id, name, yearM
     const t = useTranslations("home-page.location-card");
     const currentLocale = useLocale();
 
-    // sum all the billAmounts
-    const monthlyExpense = bills.reduce((acc, bill) => bill.paid ? acc + (bill.payedAmount ?? 0) : acc, 0);
+    // sum all the billAmounts (only for bills billed to tenant)
+    const monthlyExpense = bills.reduce((acc, bill) => (bill.paid && (bill.billedToTenant ?? true)) ? acc + (bill.payedAmount ?? 0) : acc, 0);
 
     const handleCopyLinkClick = () => {
         // copy URL to clipboard
@@ -40,7 +40,7 @@ export const LocationCard:FC<LocationCardProps> = ({location: { _id, name, yearM
                 <h2 className="card-title mr-[2em] text-[1rem]">{formatYearMonth(yearMonth)} {name}</h2>
                 <div className="card-actions">
                     {
-                        bills.map(bill => <BillBadge key={`${_id}-${bill._id}`} locationId={_id} bill={bill} />)
+                        bills.filter(bill => bill.billedToTenant ?? true).map(bill => <BillBadge key={`${_id}-${bill._id}`} locationId={_id} bill={bill} />)
                     }
                     <Link href={`/bill/${_id}/add`} className="tooltip" data-tip={t("add-bill-button-tooltip")}>
                         <PlusCircleIcon className="h-[1em] w-[1em] cursor-pointer text-2xl inline-block" /><span className="ml-1 text-xs ml-[0.2rem]">{t("add-bill-button-tooltip")}</span>