refactor: Improve tenant payment instructions UX and disable incomplete features

Renamed "2D CODE" feature to "PAYMENT INSTRUCTIONS" for better clarity
and disabled incomplete auto-forwarding features.

Changes:
- Renamed tenant 2D code section to "Payment Instructions"
- Updated labels to reflect that feature shows payment instructions + 2D code
- Added InfoBox with important note about required app settings (name & IBAN)
- Disabled auto bill forwarding toggle (feature incomplete)
- Disabled rent due notification toggle (feature incomplete)
- Updated translations in both English and Croatian

The new naming better reflects what the feature does: showing payment
instructions with IBAN details and a scannable 2D code to tenants.

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

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

messages/hr.json

@@ -139,9 +139,10 @@
     "location-name-legend": "Realestate name",
     "location-name-placeholder": "unesite naziv nekretnine",
     "notes-placeholder": "bilješke",
-    "tenant-2d-code-legend": "2D BARKOD ZA PODSTANARA",
-    "tenant-2d-code-info": "2D barkod omogućuje podstanaru da brzo i jednostavno na vaš IBAN uplati iznos koji vam duguje za plaćene režije. Barkod će biti prikazan kada podstanar otvori poveznicu na obračun za zadani mjesec.",
-    "tenant-2d-code-toggle-label": "generiraj 2D barkod",
+    "tenant-2d-code-legend": "UPUTE ZA UPLATU",
+    "tenant-2d-code-info": "Kada podstanar otvori poveznicu na obračun za zadani mjesec aplikacija mu može prikazati upute za uplatu troškova režija na vaš IBAN, kao i 2D koji može skenirati.",
+    "tenant-2d-code-toggle-label": "podstanaru prikaži upute za uplatu",
+    "tenant-2d-code-note": "VAŽNO: za ovu funkcionalnost potrebno je otvoriti postavke aplikacije, te unijeti vaše ime i IBAN.",
     "tenant-name-label": "Ime i prezime podstanara",
     "tenant-name-placeholder": "unesite ime i prezime podstanara",
     "tenant-street-label": "Ulica podstanara i kućni broj",