feat(前端优化): 优化后台渲染与导出，修复快速滚动时加载状态残留

assets/webui/ofdgo.wasm.js

@@ -0,0 +1,31 @@
+importScripts("./wasm_exec.js");
+
+self.onmessage = ({ data: { id, name, args } }) => {
+	try {
+		const payload = globalThis[name](...args);
+		const result = typeof payload === "string" ? JSON.parse(payload) : payload;
+		self.postMessage({ id, ...result }, result.data?.bytes ? [result.data.bytes.buffer] : []);
+	} catch (err) {
+		self.postMessage({ id, ok: false, error: err.message });
+	}
+};
+
+function exitWASM(err) {
+	self.postMessage({ type: "exit", error: err?.message || "渲染引擎已退出" });
+	self.close();
+}
+
+async function loadWASM() {
+	const go = new Go();
+	self.postMessage({ type: "progress", text: "正在下载引擎", percent: 16 });
+	const response = await fetch("./ofdgo.wasm");
+	self.postMessage({ type: "progress", text: "正在编译引擎", percent: 35 });
+	const { instance } = await WebAssembly.instantiateStreaming(response, go.importObject);
+	self.postMessage({ type: "progress", text: "正在启动引擎", percent: 58 });
+	go.run(instance).then(exitWASM, exitWASM);
+	if (!go.exited) {
+		self.postMessage({ type: "ready" });
+	}
+}
+
+loadWASM().catch(exitWASM);