## Summary
- name devices at sign-in and migrate existing session registries in place
- list active devices with current-device, creation, and expiry context
- selectively revoke one remote session through same-origin CSRF-protected APIs
- add a 320px-safe Active devices sheet rendered with text-only DOM APIs
## Validation
- pytest -q: 592 passed
- Python compileall and Node syntax checks passed
Closes #325
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Summary
Validation
Closes #325