updated the dungeon loading so it doesnt fail first try

src/game/dungeonSessionAssetCache.test.ts

@@ -2,7 +2,8 @@ import { useGLTF } from "@react-three/drei";
 import { afterEach, describe, expect, it, vi } from "vitest";
 import { dungeonGltfUrls } from "./dungeonAssets";
 import { dungeonDefinitionById } from "./dungeonRegistry";
-import { activateDungeonSession } from "./dungeonSession";
+import { activateDungeonSession, restartActiveDungeonSession } from "./dungeonSession";
+import { usePartyStore } from "./partyStore";
 import { useGameStore } from "./store";
 
 describe("dungeon session asset eviction", () => {
@@ -28,4 +29,19 @@ describe("dungeon session asset eviction", () => {
     expect(activateDungeonSession("not-a-dungeon")).toBe(false);
     expect(clear).not.toHaveBeenCalled();
   });
+
+  it("restarts the active dungeon in place while preserving its party", () => {
+    const active = dungeonDefinitionById("deadmines")!;
+    useGameStore.getState().activateDungeon(active.id);
+    usePartyStore.getState().initializeParty("retry-party", 20, 600, "healer");
+    const members = usePartyStore.getState().members.map((member) => member.id);
+    const revision = useGameStore.getState().sessionRevision;
+    const clear = vi.spyOn(useGLTF, "clear").mockImplementation(() => undefined);
+
+    expect(restartActiveDungeonSession()).toBe(true);
+
+    expect(clear.mock.calls.map(([url]) => url)).toEqual(dungeonGltfUrls(active));
+    expect(useGameStore.getState().sessionRevision).toBe(revision + 1);
+    expect(usePartyStore.getState().members.map((member) => member.id)).toEqual(members);
+  });
 });