fix(core): desktop e2e (#15062)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Bug Fixes**
* Sign-in flows now reliably propagate richer authentication results
(user data and session type), improving persistence and reducing
intermittent sign-in issues.
* Native token handling gains a fallback for environments without
encrypted storage, improving session reliability.

* **New Features**
* User-visible warning when sign-in is session-only because encrypted
storage is unavailable.

* **Chores**
  * Tooling ignore patterns updated to exclude .codex.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.oxlintrc.json

@@ -24,6 +24,7 @@
     ".git",
     ".vscode",
     ".context",
+    ".codex",
     ".yarnrc.yml",
     ".docker",
     "**/.storybook",