feat(houses): tier house visibility — public IDOC-only, staff full, player own

Per request, split the single public house registry into three role-scoped views:

- Public /site/houses → only houses in DANGER (IDOC), by LOCATION (region + map/
  coords). No owner, price, co-owners or decay detail. Renamed "Houses in danger";
  kept live via the public house.decay feed. The full-registry deltas
  (house.update / house.remove — which carry owner/price) are REMOVED from the
  public SSE allowlist so they never reach the public channel.
- Staff full registry → new /admin/houses (admin + moderator, RoleGate + MOD_PATHS)
  backed by GET /admin/shard/houses (modAccess), with owner/price/co-owners/decay
  and search, kept live on the admin SSE channel.
- Player portal → "My houses" home-status section (own houses only, with decay/
  IDOC status) via GET /player/shard/houses, scoped to the caller's linked accounts.

Server tests green, client build clean, swagger regenerated.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

client/src/App.jsx

@@ -47,6 +47,7 @@ import AuthProvidersAdmin from './routes/admin/views/AuthProvidersAdmin.jsx'
 import UsersAdmin from './routes/admin/views/UsersAdmin.jsx'
 import UserDetail from './routes/admin/views/UserDetail.jsx'
 import InvitesAdmin from './routes/admin/views/InvitesAdmin.jsx'
+import HousesAdmin from './routes/admin/views/HousesAdmin.jsx'
 import AccountAdmin from './routes/admin/views/AccountAdmin.jsx'
 import Moderation from './routes/admin/views/Moderation.jsx'
 import ModerationUser from './routes/admin/views/ModerationUser.jsx'
@@ -144,6 +145,14 @@ export default function App() {
                 </RoleGate>
               }
             />
+            <Route
+              path="houses"
+              element={
+                <RoleGate roles={['admin', 'moderator']}>
+                  <HousesAdmin />
+                </RoleGate>
+              }
+            />
             <Route path="characters" element={<AdminCharacters />} />
             <Route path="characters/:serial" element={<AdminCharacter />} />
             <Route path="auth-providers" element={<AuthProvidersAdmin />} />