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/swagger/swagger-output.json

@@ -2876,6 +2876,41 @@
         ]
       }
     },
+    "/api/v1/admin/shard/houses": {
+      "get": {
+        "tags": [
+          "Admin · Shard"
+        ],
+        "summary": "Full house registry — owner, price, decay (admin/moderator)",
+        "description": "The complete house registry. The public endpoint shows only IDOC houses with location; this staff view carries owner/price/co-owner/decay detail.",
+        "responses": {
+          "200": {
+            "description": "Houses, ordered by name",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "array",
+                  "items": {
+                    "$ref": "#/components/schemas/ShardHouse"
+                  }
+                }
+              }
+            }
+          },
+          "500": {
+            "description": "Internal Server Error"
+          }
+        },
+        "security": [
+          {
+            "cookieAuth": []
+          },
+          {
+            "bearerAuth": []
+          }
+        ]
+      }
+    },
     "/api/v1/admin/dashboard": {
       "get": {
         "tags": [
@@ -8721,6 +8756,47 @@
           }
         ]
       }
+    },
+    "/api/v1/player/shard/houses": {
+      "get": {
+        "tags": [
+          "Player · Shard"
+        ],
+        "summary": "The caller’s own houses (home status)",
+        "description": "Houses owned by the caller’s linked accounts, with decay/IDOC status. Only the caller’s own houses — never anyone else’s.",
+        "responses": {
+          "200": {
+            "description": "The caller’s houses",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "array",
+                  "items": {
+                    "$ref": "#/components/schemas/ShardHouse"
+                  }
+                }
+              }
+            }
+          },
+          "401": {
+            "description": "Unauthorized"
+          },
+          "403": {
+            "description": "Forbidden"
+          },
+          "500": {
+            "description": "Internal Server Error"
+          }
+        },
+        "security": [
+          {
+            "cookieAuth": []
+          },
+          {
+            "bearerAuth": []
+          }
+        ]
+      }
     }
   },
   "components": {