Frontend: Contribution, payment, and finance reconciliation dashboard

[Abiorh001]

Parent: #29
Depends on: #39, #42, #50

Why

Acceptance and payment must not drift apart. Finance needs a dashboard for accepted unpaid work, pending payout, payout submitted, paid, disputed, and missing references.

Roadmap Source

• docs/operations_payment_reputation.md
• docs/roadmap_day_by_day_execution_plan.md Day 16 and Day 18
• docs/risk_register.md R5 and R14

Scope

• Contribution/payment dashboard views.
• Accepted-unpaid reconciliation list.
• Payment status update forms with reference requirement.
• Dispute/adjustment visibility where backend supports it.
• Export-ready summary for manual reconciliation.

Acceptance Criteria

• Finance can see accepted work without payment records.
• Paid status cannot be presented as complete without a payment reference.
• Dashboard totals reconcile with backend payment records.
• UI separates task acceptance from payment state.

Contributor Fit

Useful frontend/ops issue for a contributor interested in ledgers and operational reconciliation.