Token HP and conditions with DM visibility toggles, fog of war, live sight range

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HJhXuLD2Z6hv3Wqeq9UL9K

backend/app/main.py

@@ -385,6 +385,7 @@ def _entry(r, shares=None, owner=None) -> dict:
     if r["npc"]:
         e["kind"] = str(ch.get("npc_kind") or "")
         e["size"] = ch.get("token_size", 1)
+        e["hp"] = _health(r["data"])
     if shares is not None:
         e["shared_with"] = shares.get(r["id"], [])
     if owner is not None:
@@ -1143,7 +1144,14 @@ def editor_reset(section: str, confirm: bool = False, user: dict = Depends(admin
     return {"ok": True}
 
 
-maps_mod.install(api, db, current_user, _lobby_for, _dm_only, hub, _event, Path(DB_PATH).parent / "maps", _can_read_character)
+def _health(data) -> int | None:
+    try:
+        return int(compute(json.loads(data), load_rules())["derived"].get("health"))
+    except Exception:
+        return None
+
+
+maps_mod.install(api, db, current_user, _lobby_for, _dm_only, hub, _event, Path(DB_PATH).parent / "maps", _can_read_character, _health)
 combat_view = combat_mod.install(api, db, current_user, _lobby_for, _dm_only, hub, _event, load_rules)
 purge_sounds = sounds_mod.install(api, db, current_user, _lobby_for, _dm_only, hub, Path(DB_PATH).parent / "sounds")