[rooms] Preserve Studio export manifests on live saves (#143)

apps/rooms/src/test/integration/api.test.ts

@@ -6404,6 +6404,33 @@ describe('studio room bundles', () => {
 				})),
 			})
 		}
+		// In-game saves reuse the compiled Studio asset. They must keep the export
+		// manifest when staging, saving again, and publishing the new scene data.
+		for (const autoPublish of [false, false, true]) {
+			const response = await SELF.fetch(`${ORIGIN}/rooms/9901/subrooms/99011/data`, {
+				method: 'POST',
+				headers: { ...(await bearer('1')), 'Content-Type': 'application/json' },
+				body: JSON.stringify({
+					UnityAssetId: ASSET.toUpperCase(),
+					SubRoomData: { Filename: 'in-game-save' },
+					AutoPublish: autoPublish,
+				}),
+			})
+			const result = (await response.json()) as {
+				success: boolean
+				value: { subRoomDataSave: { subRoomDataSaveId: number; unityAsset: string } }
+			}
+			expect(result.success).toBe(true)
+			expect(result.value.subRoomDataSave.unityAsset).toBe(winName)
+			const detail = await SELF.fetch(
+				`${ORIGIN}/rooms/9901/subrooms/99011/saves/${result.value.subRoomDataSave.subRoomDataSaveId}?unityAssetTarget=0`,
+				{ headers: await bearer('1') }
+			)
+			expect(await detail.json()).toMatchObject({
+				UnityAsset: winName,
+				UnitySubAssets: [prefab, shared].map((UnityAssetId) => ({ UnityAssetId })),
+			})
+		}
 		await env.DB.prepare('DELETE FROM unity_asset WHERE unity_asset_id IN (?1,?2)')
 			.bind(prefab, shared)
 			.run()

packages/domain/src/rooms-db.ts

@@ -1924,6 +1924,19 @@ export async function saveSubRoomData(
 		createdAt: new Date().toISOString(),
 		unityAssetId: input.unityAssetId,
 	})
+	// A live client save changes the scene data while reusing the baked Studio
+	// asset. Its export manifest belongs to that asset and is needed again on the
+	// save's immediate reload (prefabs/materials live in separate bundles).
+	// A new Studio source upload must wait for its own cloud-build manifest.
+	if (
+		!input.unitySource &&
+		typeof input.unityAssetId === 'string' &&
+		typeof previous?.UnityAssetId === 'string' &&
+		input.unityAssetId.toLowerCase() === previous.UnityAssetId.toLowerCase() &&
+		previous.ServerData != null
+	) {
+		saveData.ServerData = previous.ServerData
+	}
 	if (input.unitySource) {
 		saveData.StudioSourceAsset = input.unitySource
 		saveData.SavedOnPlatform = null