Update Healer Man server

PLAYTEST_NOTES.md

@@ -4,6 +4,17 @@ This file is the durable record of runtime behavior, regressions, and the
 evidence required before calling a visual bug fixed. Update it whenever scene,
 camera, input, physics, mob-rendering, or asset-loading code changes.
 
+## 2026-09-27 Shadowfiend summon visibility
+
+- The dedicated `scripts/combat-effects/shadowfiend-preview.html` page cast the
+  level-80 priest spell and displayed `Shadowfiend summon active`. The live
+  `CombatSummonPopulation` renderer loaded creature 19668's textured client
+  FleshBeast model, with its feet near the purple ground marker after placement
+  adjustment. Evidence: `playtest-artifacts/shadowfiend/summon-preview.png`.
+- The isolated model preview also loaded the same graph as one mesh layer. The
+  combat test verified a fiend-owned damage event and 5% maximum-mana return
+  from the successful hit. Full dungeon entry was not part of this check.
+
 ## 2026-09-26 RuneWaker dungeon minimap and M-key map
 
 - Created a fresh RoM Rogue, downloaded Forsaken Abbey, entered as damage, and