feat(disputes): dispute resolution with member voting and admin resolution

[jajafwangshak86-ops]

Closes #208

Summary

Adds a complete dispute resolution flow for pools: members can file disputes (against another member or an admin action), the pool votes to uphold or dismiss, and the admin can force-resolve with a written note.

Database (20260824010000_dispute_resolution.sql)

• disputes: filer, optional target member, type (missed_deposit / unfair_penalty / admin_abuse / member_misconduct / other), description (≤2000 chars), up to 3 evidence URLs, status lifecycle open → voting → resolved_upheld / resolved_dismissed / expired, vote counters, resolution note + resolver + timestamp
• dispute_votes: one vote per wallet per dispute (composite PK)
• Public-read RLS (writes only via service-role API routes) + realtime publication, matching the repo's existing lockdown style

API

Endpoint	Behavior
POST /api/disputes	Members file disputes; one active dispute per filer per pool; 72h expiry; evidence URLs validated
GET /api/disputes?pool_id=	Pool feed, newest first, optional status filter
POST /api/disputes/[id]/vote	Member-only; filer/target excluded; double votes rejected by PK; auto-resolves when one side reaches ⌈members/2⌉
POST /api/disputes/[id]/resolve	Pool admin closes any active dispute with required resolution note (tie-breaker / urgent cases)
POST /api/disputes/expire	CRON_SECRET-gared job that flips stale disputes to expired — registered in vercel.json

All state changes are mirrored into pool_activity (dispute_filed, dispute_resolved).

Frontend

• DisputesPanel rendered full-width on the group page: status badges, live voting countdown, vote counter showing threshold, resolution notes
• FileDisputeDialog: type select, optional target member picker, live character counter, repeatable evidence URL inputs
• useDisputes: Supabase Realtime subscription keeps the feed live without refresh; optimistic vote updates reconcile against server truth
• lib/disputes.ts pure helpers covered by 8 node unit tests (registered in test:unit); full en/es translations

Verification (all green locally)

• pnpm lint, pnpm format:check, test:unit (210 pass incl. new disputes tests), test:components (101), pnpm build, bundle budget check
• No new TypeScript errors from the disputes files (tsc --noEmit)