[BUG] OISY wallet prefs not remembering my currency selection

[kmatzka]

Describe the bug
OISY wallet prefs do not remember my currency selection between logins.

To Reproduce
Steps to reproduce the behavior:

1. Login to oisy wallet
2. Click on preferences and select currency EUR
3. Logout
4. Clear cookies on your local browser
5. Login again: currency is back at USD

Expected behavior
OISY should store my currency pref between logins within the dapp, not in local browser cookies.

Desktop (please complete the following information):

• OS: macOS 26.0.1
• Browser Safari
• Version 26.0.1

Smartphone (please complete the following information):

• Device: iPhone Air
• OS: iOS26.0.1
• Browser Safari
• Version 26.0.1

[sbpublic]

Hi Klaus,
Apologies for the slightly delayed response.
We do store a user's preferred language and currency, but since the language can already be set before the login, we decided to store both values in the browser cache. Agree, it was a bit of a quick first win.
We will extend it to save the currency (and I think also language, but keep this also in the browser cache) in the user's profile.