Records the agreed plan to combine the two cards into one with two collapsible sections, as VISUAL GROUPING ONLY. The two tables cannot share rows: Storage is per volume, Disk health is per physical device, and one drive can back several volumes or none the operator sees. Stating that explicitly so this is never mistaken for the Phase 1 mapped-drive merge, where two sources described the same drive and the worse status won.
Deferred to its own phase because the tabs render type emits label/value fields only and has no table path, so this means extending the renderer every plugin uses. Bundling that with the Phase 2 telemetry work would turn a UI regression and a telemetry regression into one commit to bisect.
Also scopes the not nested cards density rule to the header block it was written for, having checked it does not block this.
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