feat(shard): admin write plane, help-page queue, and public champion board

Wire up the three uo-link sidecar surfaces that weren't integrated yet.

Champion spawns
- Ingest champ.update/champ.remove into a new shard_champs table (served from
  our own store, like online/houses); public /site/champs board with a nav link,
  live via the existing SSE feed (champ.* added to the public allowlist).

Staff write plane (admin + moderator)
- kick / ban / unban / broadcast via /admin/shard/*; actor is stamped server-side
  from the session, never the browser. Sidecar status codes mapped (403 disabled/
  protected, 404 unknown, 503/504 transient). admin.audit events are logged and
  surfaced at /admin/shard/audit.
- New admin "In-Game Ops" view (/admin/shard-ops), plus per-account Kick/Ban/Unban
  on the user-detail and character views (ShardAccountActions, self-gated to staff).

Help-page (support) queue
- Ingest page.new/updated/closed into a new shard_pages table; respond/close via
  /admin/shard/pages/*. Champ board and page queue are snapshotted from the
  sidecar's /champs and /pages on every WS (re)connect (guarded so a failed call
  never wipes local state).

Verified live end-to-end against MariaDB + the Rust sidecar + ServUO; unit tests
cover ingest routing (shardIngest.champsPages.test.js). Swagger regenerated.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0114TpmrNW4wNXsHq5CR72jQ

client/src/api/client.js

@@ -94,6 +94,7 @@ export const api = {
     economy: (limit) => req(`/public/shard/economy${limit ? `?limit=${limit}` : ''}`),
     online: () => req('/public/shard/online'),
     idoc: () => req('/public/shard/idoc'),
+    champs: () => req('/public/shard/champs'),
   },
   // Full paths (incl. /api/v1) for the browser EventSource — the req() wrapper is
   // fetch-only, so SSE subscribers build the URL from here. The admin stream
@@ -259,6 +260,20 @@ export const api = {
     postTownCrier: (data) => req('/admin/uo-link/towncrier', { method: 'POST', body: data }),
     deleteTownCrier: (id) => req(`/admin/uo-link/towncrier/${encodeURIComponent(id)}`, { method: 'DELETE' }),
 
+    // ----- in-game staff operations: write plane + support queue (admin/moderator) -----
+    // `actor` is stamped server-side from the session — never sent from here.
+    shardOps: {
+      kick: (data) => req('/admin/shard/kick', { method: 'POST', body: data }),
+      ban: (data) => req('/admin/shard/ban', { method: 'POST', body: data }),
+      unban: (account) => req('/admin/shard/unban', { method: 'POST', body: { account } }),
+      broadcast: (data) => req('/admin/shard/broadcast', { method: 'POST', body: data }),
+      pages: () => req('/admin/shard/pages'),
+      respondPage: (id, data) =>
+        req(`/admin/shard/pages/${encodeURIComponent(id)}/respond`, { method: 'POST', body: data }),
+      closePage: (id) => req(`/admin/shard/pages/${encodeURIComponent(id)}/close`, { method: 'POST' }),
+      audit: (limit) => req(`/admin/shard/audit${limit ? `?limit=${limit}` : ''}`),
+    },
+
     // ----- Email delivery / Gmail OAuth2 (admin only) -----
     getEmailConfig: () => req('/admin/email/config'),
     saveEmailConfig: (data) => req('/admin/email/config', { method: 'PUT', body: data }),