feat: show who an Azure account signs in as, in Details on its row

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs/keys.md

@@ -48,7 +48,7 @@ match case exactly.
 | Key | Action |
 |---|---|
 | `space` | reveal / hide the selected value (public material for keys and certificates) |
-| `y` | copy the value without revealing it; cleared from the clipboard after 30s |
+| `y` | copy the value without revealing it; cleared from the clipboard after 30s. On an Azure account's row: its object ID |
 | `Y` | copy the reference (`@Microsoft.KeyVault(...)`, key/certificate URL, `{{secrets/scope/key}}`) |
 | `v` | versions of the selected item (Azure); `space`/`y`/`Y` then act on that version; `esc`, `⌫` or `v` to go back |
 | `o` | open the selected item in the browser (over SSH: copy the link) |