Frontend: Reputation and contribution dashboard

[Abiorh001]

Parent: #29
Depends on: #40, #42, #44, #50

Why

The Workstream needs visible contribution proof: shipped work, review quality, reputation events, ledger evidence, and public-output links. Workstream also needs reputation visibility for workers and reviewers.

Roadmap Source

• docs/operations_payment_reputation.md
• contributor onboarding context: reports, ledger expectations, public portfolio development
• docs/roadmap_day_by_day_execution_plan.md Day 17 and Day 27

Scope

• Worker reputation event view.
• Reviewer reputation/quality event view.
• Skill-tag contribution summaries.
• Contribution proof panel linking issues, PRs, reports, public writing/media, and demo artifacts.
• Metrics suitable for weekly/monthly report review.

Acceptance Criteria

• Reputation events are shown with source records, not as unexplained scores.
• Contribution panel supports maintainer review of shipping, research maturity, reliability, quality, and public contribution.
• Dashboard does not overclaim portability or settlement features not implemented in v0.1.

Contributor Fit

Strong frontend/research bridge issue.