feat: add Revolut profile tooltip and test link to UserSettingsForm

- Add tooltip under Revolut profile input explaining where to find the profile name
- Add test payment link that appears when profile name is valid (>5 chars)
- Reorder ViewLocationCard payment UI: QR code placeholder first, link below centered
- Replace hardcoded text with translation keys for better i18n support
- Add English and Croatian translations for test link and payment button

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

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

messages/en.json

@@ -70,7 +70,8 @@
       "payment-purpose-code-label": "Purpose code:",
       "payment-description-label": "Payment description:",
       "upload-proof-of-payment-legend": "Proof of payment",
-      "upload-proof-of-payment-label": "Here you can upload proof of payment:"
+      "upload-proof-of-payment-label": "Here you can upload proof of payment:",
+      "revolut-link-text": "Pay with Revolut"
     },
     "month-card": {
       "payed-total-label": "Total monthly expenditure:",
@@ -218,6 +219,8 @@
     "revolut-profile-label": "Revolut profile name",
     "revolut-profile-placeholder": "enter your Revolut profile name for receiving payments",
     "revolut-profile-tooltip": "You can find your Revolut profile name in the Revolut app under your user profile. It is displayed below your name and starts with the '@' symbol (e.g., '@john123').",
+    "revolut-profile--test-link-label": "Test your Revolut link:",
+    "revolut-profile--test-link-text": "Pay with Revolut",
 
     "payment-additional-notes": "IMPORTANT: For the payment instructions to be displayed to the tenant, you must also enable this option in the property's settings.",