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>

server/src/router/v1/public/shard.controller.js

@@ -148,11 +148,24 @@ async function getPresence(req, res) {
   }
 }
 
-// GET /public/shard/houses — the house registry (every house we've seen via
-// house.update). Live via house.update / house.remove on the public SSE stream.
+// GET /public/shard/houses — PUBLIC view: only houses in danger (IDOC), and only
+// their location (name + region + map/coords). Owner, price, co-owners and decay
+// detail are staff-only (see admin GET /admin/shard/houses). Live via house.decay
+// on the public SSE stream. This is the "where are the falling houses" board.
 async function getHouses(req, res) {
   try {
-    return res.json(await shardState.listHouses())
+    const idoc = await shardState.listIdoc()
+    const publicHouses = idoc.map((h) => ({
+      serial: h.serial,
+      name: h.name,
+      region: h.region,
+      map: h.map,
+      x: h.x,
+      y: h.y,
+      z: h.z,
+      isIdoc: true,
+    }))
+    return res.json(publicHouses)
   } catch (err) {
     log.error('shard.getHouses', err)
     return res.status(500).json({ message: 'Internal Server Error' })