optimize page load check in getCompletion method

provider.mjs

@@ -214,6 +214,18 @@ class YouProvider {
 		const { page, browser } = session;
 		const emitter = new EventEmitter();
 		
+		// 检查页面是否已经加载完成
+		const isLoaded = await page.evaluate(() => {
+			return document.readyState === 'complete' || document.readyState === 'interactive';
+		});
+
+		if (!isLoaded) {
+			console.log('页面尚未加载完成，等待加载...');
+			await page.waitForNavigation({ waitUntil: 'domcontentloaded', timeout: 10000 }).catch(() => {
+				console.log('页面加载超时，继续执行');
+			});
+		}
+
 		// 计算用户消息长度
 		let userMessage = [{ question: "", answer: "" }];
 		let userQuery = "";
@@ -378,7 +390,8 @@ class YouProvider {
 		var url = "https://you.com/api/streamingSearch?" + req_param.toString();
 		console.log("正在发送请求");
 		emitter.emit("start", traceId);
-		page.evaluate(
+		try {
+			await page.evaluate(
 				async (url, traceId) => {
 					var evtSource = new EventSource(url);
 					var callbackName = "callback" + traceId;
@@ -424,11 +437,18 @@ class YouProvider {
 				url,
 				traceId
 			);
+		} catch (error) {
+			console.error("评估过程中出错:", error);
+			emitter.emit("error", error);
+			return { completion: emitter, cancel: () => {} };
+		}
+
 		const cancel = () => {
 			page?.evaluate((traceId) => {
 				window["exit" + traceId]();
-			}, traceId);
+			}, traceId).catch(console.error);
 		};
+
 		return { completion: emitter, cancel };
 	}
 }