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/HomePage.tsx

@@ -49,7 +49,7 @@ 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)
+          monthlyExpense: locationsInMonth.monthlyExpense + location.bills.reduce((acc, bill) => (bill.paid && (bill.billedToTenant ?? true)) ? acc + (bill.payedAmount ?? 0) : acc, 0)
         }
       })
     }
@@ -59,7 +59,7 @@ 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)
+        monthlyExpense: location.bills.reduce((acc, bill) => (bill.paid && (bill.billedToTenant ?? true)) ? acc + (bill.payedAmount ?? 0) : acc, 0)
       }
     });
   }, {} as {[key:string]:{