Build admin dashboard with server management pages, UI primitives, and analytics

[Spbd1]

Motivation

• Provide a fully functional admin UI for operating experiment servers, inspecting state, running server actions, and exporting data.
• Surface server- and round-level metrics and visualizations to support monitoring and research workflows.

Description

• Added a reusable admin UI library and layout, including Card, StatCard, ServerStatusBadge, ConditionBadge, AdminPageHeader, EmptyState, LoadingState, ErrorState, ButtonLink, DataTable, ConfirmDialog, and an admin shell/sidebar for the App Router (files under apps/web/app/admin/_components).
• Implemented admin pages and routes with server-side Prisma fetching for the requested sections: dashboard (/admin), servers list (/admin/servers), create server (/admin/servers/new), server detail and actions (/admin/servers/:serverId), and per-server subpages for config, players, parcels, rounds, contracts, events, and analytics, plus exports, audit-log, and admin/login (files under apps/web/app/admin/**).
• Built admin actions with confirmation and preview support (AdminActions) that call existing admin APIs (generate map, start/resolve/complete/archive, export), and added a server creation action that can optionally generate a 10x10 map server-side (createServer action uses createServerMap).
• Integrated Recharts wrappers (AdminCharts) for line/bar/pie/distribution charts and implemented round- and server-level analytics pages; added a 10x10 parcel map UI and parcel-quality Gini calculations (format utilities include gini).
• Added recharts to apps/web/package.json for charting and wired all pages to use server-side TypeScript/Prisma queries for actual data (no mock UI).

Testing

• Ran lint with pnpm --filter @parcel-society/web lint, which passed after minor fixes to new files.
• Attempted typecheck with pnpm --filter @parcel-society/web typecheck, which was blocked by the local environment reporting TS5103: Invalid value for '--ignoreDeprecations' and a missing node_modules warning, so full TypeScript verification could not complete locally.
• Attempted to add the recharts dependency with pnpm install --lockfile-only, but the registry request failed with a 403 Forbidden when fetching @eslint/js, preventing a full install in this environment.

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Codex Task