Customer-facing dashboard

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Problem: A customer needs a place to see their loop's status, spend, and logs — distinct from any internal operations view.

Area: Frontend

Proposal: Build a minimal customer-facing dashboard surfacing #4800's progress stream and #4792's spend/ledger data.

Deliverables:

• A working dashboard covering submit → watch progress → see spend and results.

Acceptance criteria:

• A pilot customer can go from idea submission to viewing a completed result without engineering assistance.

Boundaries:

• Blocked on Real-time progress streaming #4800 and Rental ledger integration #4792. Minimal viable surface — full polish comes after the launch-readiness gate (Launch-readiness gate #4810).

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Part of #4778.

Design system: this dashboard must be built on the shared design-system package from #4966/#4967 — do not scaffold a third divergent styling approach for it.

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JSO-3479