fix(coding-agent): use async operations in tools

packages/coding-agent/src/utils/image-resize-worker.ts

@@ -0,0 +1,42 @@
+import { parentPort } from "node:worker_threads";
+import { type ImageResizeOptions, type ResizedImage, resizeImageInProcess } from "./image-resize-core.ts";
+
+interface ResizeImageWorkerRequest {
+	inputBytes: Uint8Array;
+	mimeType: string;
+	options?: ImageResizeOptions;
+}
+
+interface ResizeImageWorkerResponse {
+	result?: ResizedImage | null;
+	error?: string;
+}
+
+function isResizeImageWorkerRequest(value: unknown): value is ResizeImageWorkerRequest {
+	if (!value || typeof value !== "object") return false;
+	const record = value as Record<string, unknown>;
+	return record.inputBytes instanceof Uint8Array && typeof record.mimeType === "string";
+}
+
+const port = parentPort;
+if (!port) {
+	throw new Error("image resize worker requires parentPort");
+}
+
+port.once("message", (message: unknown) => {
+	void (async () => {
+		try {
+			if (!isResizeImageWorkerRequest(message)) {
+				throw new Error("Invalid image resize worker request");
+			}
+			const result = await resizeImageInProcess(message.inputBytes, message.mimeType, message.options);
+			const response: ResizeImageWorkerResponse = { result };
+			port.postMessage(response);
+		} catch (error) {
+			const response: ResizeImageWorkerResponse = {
+				error: error instanceof Error ? error.message : String(error),
+			};
+			port.postMessage(response);
+		}
+	})();
+});