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>

messages/hr.json

@@ -61,7 +61,8 @@
     "location-card": {
       "edit-card-tooltip": "Izmjeni nekretninu",
       "add-bill-button-tooltip": "Dodaj novi račun",
-      "payed-total-label": "Ukupno plaćeno:",
+      "total-due-label": "Ukupno neplaćeno:",
+      "total-payed-label": "Ukupno plaćeno:",
       "link-copy-message": "Link kopiran na clipboard",
       "monthly-statement-legend": "Obračun",
       "seen-by-tenant-label": "viđeno od strane podstanara",
@@ -81,7 +82,8 @@
       "revolut-link-text": "Plati pomoću Revoluta"
     },
     "month-card": {
-      "payed-total-label": "Ukupni mjesečni trošak:",
+      "total-due-label": "Ukupno neplaćeno u mjesecu:",
+      "total-payed-label": "Ukupno plaćeno u mjesecu:",
       "print-codes-tooltip": "Ispis 2d kodova",
       "print-codes-label": "Ispis kodova"
     },