DEV-C P2: Promise.all meant one rejected RPC failed the whole render.
allSettled + per-slot fallback keeps the active-devices surface usable
when the revoked-list feed (or one bad ssh fingerprint) is down.
Two call sites converted in devices.ts:
1. list_devices + list_revoked pair — revoked failures now render an
inline "couldn't load" slot instead of failing the page.
2. sshFingerprint map — one bad public key falls back to '(unknown)'
instead of killing the whole device list.
trash.ts only has a single sendMessage in its load path on this branch,
so it has no Promise.all to migrate. Plan was written against a slightly
different snapshot; documented divergence in report.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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