feat(web): continue source-backed implementation waves

web/app/src/engine-client/WebEngineClient.ts

@@ -23,6 +23,7 @@ import type { CapabilityGateResult } from "../../../protocol/capability-gates";
 import { applyMeshGeometryDelta } from "../../../protocol/mesh-geometry-delta";
 import { createWorkerFault, type WorkerFault } from "../../../protocol/worker-fault";
 import { getWebEngineCommandCapability } from "../../../protocol/web-engine-capabilities";
+import { resourceCommands } from "../../../protocol/resource-commands";
 import type {
   PaintStrokeSessionBeginIR,
   PaintStrokeSessionCancelIR,
@@ -206,7 +207,7 @@ export class WebEngineClient {
 
   async requestAsset(assetId: string): Promise<AssetRequestResult> {
     if (!assetId) throw this.report("INVALID_ARGUMENT", "Asset ID 不能为空", true);
-    const result = await this.request({ type: "requestAsset", assetId });
+    const result = await this.request(resourceCommands.requestAsset(assetId));
     if (!result.asset) throw this.report("INVALID_ARGUMENT", "WebEngine 未返回资产结果", true);
     return result.asset;
   }