Captures the full design for splitting LFF/SFF/NVMe drive bay
groups from flat radios into Drive Selection + Drive Quantity
composite controls. Includes the SAS variants user requested,
per-drive pricing table, schema decisions (no migrations needed,
existing schema already supports multi-option groups), Pinia
store changes, new DriveBayGroupSelector component sketch, URL
param contract changes, and migration steps.
Implementation deferred to a focused next session — realistic
4-5 hour build (backend seeder + frontend component + store
rework + test rewrite). Phase A (PCIe NVMe Add-in) shipped
ahead of this in c74ca7f.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>