Both wizards now source candidates from the agent's Impl-2a raw-device scan
(GET /disks/candidates, proxied) instead of the Observe-based /api/disks — so a
brand-new non-PVE-storage drive is finally discoverable + enrollable end-to-end.
agentapi.ListCandidates + a passthrough proxy (no controller-side filtering; the
agent's unclaimed filter is authoritative). storage_init renders `initialize`,
storage_attach renders `attach`; the enroll flow + Impl-1 guarded mkfs unchanged.
Tests + go build/vet/test clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
A failed agent format (e.g. 502 'device is mounted', ok:false, data:null) fell
through FormatDisk's trailing 'return out, nil', so the web layer reported a
zero-value FormatResult as ok:true — a failed DESTRUCTIVE format read as success.
postWithStatus now returns the full envelope; FormatDisk returns a non-nil error
on any non-2xx/ok:false that is not a recognized refusal (403/needs-confirmation).
Test TestFormat_MountedFailureSurfacesError (502 → non-nil err) fails on old code.
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