[codex] show live funded marketplace work

[micrc2]

What changed

• replace the stale hard-coded "Looking for Work" examples with funded listings from Gibwork's public /api/explore feed
• exclude closed, hidden, expired, and depleted listings before they reach the landing page
• rank a category-diverse preview so a run of social campaigns does not crowd out development, design, and open-source work
• show live summary proof: open opportunities, available rewards, category count, and highest reward
• link every card to the actual task or bounty and surface its category, verification requirement, deadline, and remaining reward
• refresh the server-rendered snapshot every 15 minutes, with safe generic fallbacks when the marketplace API is unavailable
• add deterministic regression tests for filtering, ranking/diversity, statistics, and fallback behavior

Why

The homepage currently shows static examples and amounts that can drift away from the funded marketplace. A visitor cannot tell whether those examples are still open, funded, or even real. This change makes the worker-facing proof auditable and current without making the page dependent on a successful API request.

Impact

Visitors see current funded work and can open the exact listing in one click. Closed or unfunded work is never promoted. The static fallback preserves a working production build during API outages, while incremental regeneration keeps the normal path fast.

Validation

• npm test — 3 passed
• npx tsc --noEmit
• npm run build
• desktop and 390 px mobile viewport checks against the production build
• git diff --check

Evidence

• Desktop preview screenshot: https://github.com/micrc2/bounty-evidence/releases/download/gibwork-marketplace-proof-121/gibwork-marketplace-desktop-clean.png
• Mobile preview screenshot: https://github.com/micrc2/bounty-evidence/releases/download/gibwork-marketplace-proof-121/gibwork-marketplace-mobile-clean.png
• Evidence release: https://github.com/micrc2/bounty-evidence/releases/tag/gibwork-marketplace-proof-121

Related funded task: https://app.gib.work/tasks/b7c2a3c9-c412-4613-9cfb-d8a5f54d14b7

Addresses #118.

[vercel]

@micrc2 is attempting to deploy a commit to the gibwork Team on Vercel.

A member of the Team first needs to authorize it.