add option to delete location in all subsequent months

- Added toggle in LocationDeleteForm for deleting locations from future months (disabled by default)
- Modified deleteLocationById action to support batch deletion across subsequent months
- When enabled, deletes all locations with same name in current and future months/years
- Only deletes user's own locations with proper data isolation
- Added translations for toggle text in Croatian and English
- Removed unused imports and variables to fix TypeScript warnings
- Uses efficient MongoDB deleteMany operation for bulk deletions

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

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

messages/hr.json

@@ -87,9 +87,10 @@
     "back-button": "Nazad"
   },
   "location-delete-form": {
-    "text": "Molim potvrdi brisanje nekretnine “<strong>{name}</strong>””.",
+    "text": "Molim potvrdi brisanje nekretnine “<strong>{name}</strong>“.",
     "cancel-button": "Odustani",
-    "confirm-button": "Potvrdi"
+    "confirm-button": "Potvrdi",
+    "delete-in-subsequent-months": "Obriši u svim mjesecima koji slijede"
   },
   "location-edit-form": {
     "location-name-placeholder": "Ime nekretnine",