Phase 3 of docs/roadmap/storage-locations.md.
The step appears only when the candidate scan finds a filesystem
LibrePortal isn't already using, so the single-disk case — which is most
boxes — is completely unchanged. It sits before Recommended because a
location has to exist before an app can be placed on it.
Supporting two conditional steps meant the wizard could no longer treat
'position in the DOM' and 'step index' as the same number: Metrics was
advanced-only and got away with 'length minus one', but a step hidden in
the MIDDLE leaves a gap. Navigation, progress, validation and submit now
all run off _visibleSteps(), and section matching is by data-step rather
than DOM position.
Unusable candidates render greyed WITH the reason rather than being
filtered out — 'why isn't my drive listed?' is a support burden, and
'exFAT can't store file ownership' is actionable. The step is skipped
only when nothing usable was found at all.
What the wizard sends is a request, not an instruction: setupApplyConfig
feeds each path through storageAdd, so the fitness checks and the root
helper's admission rules both re-run regardless of what arrived in the
payload.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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