Update Healer Man server

src/dev/ShadowfiendPreview.tsx

@@ -0,0 +1,51 @@
+// Development-only inspection surface for the live combat-summon renderer.
+import { useEffect, useRef, useState } from "react";
+import { createRoot } from "react-dom/client";
+import { Canvas } from "@react-three/fiber";
+import { Grid, OrbitControls } from "@react-three/drei";
+import { preloadAbilityCatalogsForClasses } from "../game/abilityCatalog";
+import { useCombatStore } from "../game/combatStore";
+import { setMobPosition } from "../game/mobRuntimeRegistry";
+import { CombatSummonPopulation } from "../scene/CombatSummonPopulation";
+
+function Preview() {
+  const [status, setStatus] = useState("Casting Shadowfiend…");
+  const canvas = useRef<HTMLCanvasElement | null>(null);
+  useEffect(() => {
+    void preloadAbilityCatalogsForClasses(["priest"]).then(() => {
+      const combat = useCombatStore.getState();
+      combat.initializeCharacter({ classId: "priest", level: 80 });
+      combat.registerMob("shadowfiend-preview-target", {
+        name: "Target", level: 80, maxHealth: 100_000, xpReward: 0,
+      });
+      setMobPosition("shadowfiend-preview-target", [3, 0, 0]);
+      combat.selectMob("shadowfiend-preview-target");
+      const result = combat.castAbility("wow335-priest-shadowfiend", [0, 0, 0], 1_000);
+      setStatus(result.ok ? "Shadowfiend summon active" : `Cast failed: ${result.reason}`);
+    }).catch((error) => setStatus(`Catalog failed: ${String(error)}`));
+  }, []);
+  return <>
+    <div style={{ padding: 16, display: "flex", alignItems: "center", gap: 16 }}>
+      <span>{status}</span>
+      <button onClick={() => {
+        if (!canvas.current) return;
+        const link = document.createElement("a");
+        link.download = "shadowfiend-summon-preview.png";
+        link.href = canvas.current.toDataURL("image/png");
+        link.click();
+      }}>Save screenshot</button>
+    </div>
+    <div style={{ height: "calc(100vh - 55px)" }}>
+      <Canvas camera={{ position: [4, 3, 5], fov: 50 }} gl={{ preserveDrawingBuffer: true }}
+        onCreated={({ gl }) => { canvas.current = gl.domElement; }}>
+        <color attach="background" args={["#0b121b"]} />
+        <ambientLight intensity={1} />
+        <Grid args={[20, 20]} cellColor="#304051" sectionColor="#4a637d" />
+        <CombatSummonPopulation active />
+        <OrbitControls target={[0, 0.9, 0]} />
+      </Canvas>
+    </div>
+  </>;
+}
+
+if (import.meta.env.DEV) createRoot(document.getElementById("root")!).render(<Preview />);