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/App.jsx

@@ -18,6 +18,7 @@ import About from './routes/public/About.jsx'
 import Status from './routes/public/Status.jsx'
 import Shard from './routes/public/Shard.jsx'
 import ShardActivity from './routes/public/ShardActivity.jsx'
+import ChampSpawns from './routes/public/ChampSpawns.jsx'
 import Wiki from './routes/wiki/Wiki.jsx'
 import WikiArticle from './routes/wiki/WikiArticle.jsx'
 import CmsPage from './routes/public/CmsPage.jsx'
@@ -36,6 +37,7 @@ import ActivityAdmin from './routes/admin/views/ActivityAdmin.jsx'
 import BotActivityAdmin from './routes/admin/views/BotActivityAdmin.jsx'
 import DiscordBotAdmin from './routes/admin/views/DiscordBotAdmin.jsx'
 import ShardAdmin from './routes/admin/views/ShardAdmin.jsx'
+import ShardOps from './routes/admin/views/ShardOps.jsx'
 import AdminCharacters from './routes/admin/views/AdminCharacters.jsx'
 import AdminCharacter from './routes/admin/views/AdminCharacter.jsx'
 import AuthProvidersAdmin from './routes/admin/views/AuthProvidersAdmin.jsx'
@@ -77,6 +79,7 @@ export default function App() {
             <Route path="/site/status" element={<Status />} />
             <Route path="/site/shard" element={<Shard />} />
             <Route path="/site/shard/activity" element={<ShardActivity />} />
+            <Route path="/site/champs" element={<ChampSpawns />} />
             <Route path="/wiki" element={<Wiki />} />
             <Route path="/wiki/:slug" element={<WikiArticle />} />
             {/* CMS pages: top-level /:slug, matched only after the named routes
@@ -121,6 +124,14 @@ export default function App() {
             <Route path="bot-activity" element={<BotActivityAdmin />} />
             <Route path="discord-bot" element={<DiscordBotAdmin />} />
             <Route path="shard" element={<ShardAdmin />} />
+            <Route
+              path="shard-ops"
+              element={
+                <RoleGate roles={['admin', 'moderator']}>
+                  <ShardOps />
+                </RoleGate>
+              }
+            />
             <Route path="characters" element={<AdminCharacters />} />
             <Route path="characters/:serial" element={<AdminCharacter />} />
             <Route path="auth-providers" element={<AuthProvidersAdmin />} />