Description

The selected default identity does not persist across browsers or survive clearing site data, even though all other per-account settings sync correctly. The value appears to live only in the browser-local identity-storage store and is never written to the server-side encrypted settings, so there is no cross-device/server persistence.

Steps to Reproduce

1. Create an alias for your account in Stalwart.
2. In Bulwark, navigate to Settings > Identities
3. Click Manage Identities
4. Click the ⭐️ next to the non-default (alias) identity.
5. Confirm it sticks in the current browser by composing a message (alias identity should be default in message From field).
6. Clear site data (or open Bulwark in a different browser / private window).
7. Compose a message. The From field defaults to to the Stalwart account default.
8. Navigate to Settings > About & Data. Click Export to export settings as JSON.
9. Inspect JSON file and observe lack of identity settings.

Expected Behavior

I expect my selected default sender identity to sync across browsers and survive clearing site data. I expect this selection to appear in exported JSON settings.

Actual Behavior

The default identity is not persisted server-side. It lives only in browser localStorage under identity-storage (a Zustand persist store):

• Before setting a default identity: {"state":{"subAddress":{"recentTags":[],"tagSuggestions":{}},"preferredPrimaryId":null},"version":0}
• After choosing a default: {"state":{"subAddress":{"recentTags":[],"tagSuggestions":{}},"preferredPrimaryId":"b"},"version":0}
• After clearing site data: {"state":{"subAddress":{"recentTags":[],"tagSuggestions":{}},"preferredPrimaryId":null},"version":0}

There is no corresponding field in the exported settings JSON.

Bulwark Version

1.7.5

Stalwart Mail Server Version

0.16.10

Browser

Chrome / Chromium (Brave)

Operating System

macOS

Additional Context

SETTINGS_SYNC_ENABLED=true
SESSION_SECRET is set
SETTINGS_DATA_DIR is on a persistent volume