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/routes/admin/AdminLayout.jsx

@@ -63,6 +63,7 @@ const NAV = [
     title: 'Moderation',
     items: [
       { to: '/admin/moderation', label: 'Moderation', icon: IconShield, roles: ['admin', 'moderator'] },
+      { to: '/admin/shard-ops', label: 'In-Game Ops', icon: IconShard, roles: ['admin', 'moderator'] },
     ],
   },
   {
@@ -94,6 +95,7 @@ const TITLES = {
   '/admin/wiki': 'Wiki Pages',
   '/admin/hero': 'Hero Editor',
   '/admin/moderation': 'Moderation',
+  '/admin/shard-ops': 'In-Game Ops',
   '/admin/settings': 'Site Settings',
   '/admin/activity': 'Activity Log',
   '/admin/bot-activity': 'Web Bot Activity',
@@ -136,11 +138,13 @@ export default function AdminLayout() {
   const wide = location.pathname === '/admin/hero'
   const modeDot = mode === 'live' ? 'var(--mode-live)' : 'var(--mode-maint)'
 
-  // Moderators only get the moderation section + their own account security.
+  // Moderators only get the moderation section (Discord + in-game ops) + their
+  // own account security.
   const isModerator = user?.role === 'moderator'
+  const MOD_PATHS = ['/admin/moderation', '/admin/shard-ops', '/admin/account']
   const visible = (item) => {
     if (item.roles && !item.roles.includes(user?.role)) return false
-    if (isModerator) return item.to === '/admin/moderation' || item.to === '/admin/account'
+    if (isModerator) return MOD_PATHS.includes(item.to)
     return true
   }
   // Drop items the current role can't see, then drop any now-empty group so an
@@ -178,7 +182,9 @@ export default function AdminLayout() {
   useEffect(() => {
     if (!isModerator) return
     const p = location.pathname
-    if (!p.startsWith('/admin/moderation') && p !== '/admin/account') {
+    const allowed =
+      p.startsWith('/admin/moderation') || p.startsWith('/admin/shard-ops') || p === '/admin/account'
+    if (!allowed) {
       navigate('/admin/moderation', { replace: true })
     }
   }, [isModerator, location.pathname, navigate])