feat: implement full admin panel with 6 sections

[capa8795-design]

Summary

Replace the placeholder AdminPanelPage with a fully functional admin panel covering 8 sections as specified in the requirements.

Changes

Backend (Express API)

• 15 new API endpoints under /api/admin/:
  • User management (list, detail, suspend, reinstate, ban)
  • Job moderation queue (list flagged, approve, reject with reason)
  • Dispute resolution (list, detail, issue ruling)
  • Platform controls (get, update registration/job posting toggles)
  • Audit log (filterable by admin, action, date range)
• In-memory data store with 8 mock users, 8 jobs, 3 disputes
• Dev login endpoint (POST /api/admin/dev-login) for local testing

Frontend (Next.js)

• 6-tab admin panel with navigation:
  • Dashboard — summary cards + trust score distribution chart
  • Users — searchable/filterable table with suspend/ban/reinstate
  • Moderation — flagged jobs queue with approve/reject (confirmation dialog)
  • Disputes — dispute cards with message threads, evidence viewer, ruling interface
  • Controls — platform toggles with confirmation dialogs, audit-logged changes
  • Audit Log — filterable log of all admin actions
• JWT-based auth — admin login generates token, stored in localStorage
• Loading, empty, error states handled for every section
• Dark theme matching existing design system

Modified files

• apps/api/src/routes/adminRoutes.js — +dev-login, +14 new routes
• apps/api/src/controllers/adminController.js — 14 new controller functions
• apps/api/src/services/adminService.js — full in-memory data layer
• apps/web/app/admin/page.tsx — full 6-tab interface (~560 lines)

New files

• apps/web/app/admin/admin.css — admin-specific styles (~120 lines)

Closes #29

[BossChaos]

Code Review

PR: feat: implement full admin panel with 6 sections by @capa8795-design

• 🔒 Admin panel — needs security review

Wallet: 0xdaE5d307339074A24F579dB48e7c639359D94904

Code review for SecureBananaLabs bug-bounty