Reunify the miner-ui portfolio view with the CLI's own richer dashboard

[JSONbored]

Problem: The miner-ui's portfolio view re-implements its own narrower, global-only aggregation instead of reusing the CLI's own richer, per-repo queue dashboard — a real functional regression, not just duplicated code.

Area: AMS / Performance

Proposal: Have the miner-ui's portfolio view consume the same per-repo dashboard data the CLI already computes, rather than maintaining a separate, narrower aggregation.

Deliverables:

• One shared data path for portfolio/queue-health data, consumed by both the CLI and the UI.

Acceptance criteria:

• The miner-ui's portfolio view shows the same per-repo detail the CLI's queue dashboard shows, not just a global aggregate.

[linear-code]

JSO-3506