feat: 支持收到c2c消息后回复输入中状态

src/api.ts

@@ -153,6 +153,29 @@ export async function sendC2CMessage(
   });
 }
 
+/**
+ * 发送 C2C 输入状态提示（告知用户机器人正在输入）
+ */
+export async function sendC2CInputNotify(
+  accessToken: string,
+  openid: string,
+  msgId?: string,
+  inputSecond: number = 60
+): Promise<void> {
+  const msgSeq = msgId ? getNextMsgSeq(msgId) : 1;
+  const body = {
+    msg_type: 6,
+    input_notify: {
+      input_type: 1,
+      input_second: inputSecond,
+    },
+    msg_seq: msgSeq,
+    ...(msgId ? { msg_id: msgId } : {}),
+  };
+  
+  await apiRequest(accessToken, "POST", `/v2/users/${openid}/messages`, body);
+}
+
 /**
  * 发送频道消息
  */

src/gateway.ts

@@ -1,7 +1,7 @@
 import WebSocket from "ws";
 import path from "node:path";
 import type { ResolvedQQBotAccount, WSPayload, C2CMessageEvent, GuildMessageEvent, GroupMessageEvent } from "./types.js";
-import { getAccessToken, getGatewayUrl, sendC2CMessage, sendChannelMessage, sendGroupMessage, clearTokenCache, sendC2CImageMessage, sendGroupImageMessage } from "./api.js";
+import { getAccessToken, getGatewayUrl, sendC2CMessage, sendChannelMessage, sendGroupMessage, clearTokenCache, sendC2CImageMessage, sendGroupImageMessage, sendC2CInputNotify } from "./api.js";
 import { getQQBotRuntime } from "./runtime.js";
 import { startImageServer, saveImage, saveImageFromPath, isImageServerRunning, downloadFile, type ImageServerConfig } from "./image-server.js";
 
@@ -218,6 +218,17 @@ export async function startGateway(ctx: GatewayContext): Promise<void> {
           log?.info(`[qqbot:${account.accountId}] Attachments: ${event.attachments.length}`);
         }
 
+        // 对于 C2C 消息，先发送输入状态提示用户机器人正在输入
+        if (event.type === "c2c") {
+          try {
+            const token = await getAccessToken(account.appId, account.clientSecret);
+            await sendC2CInputNotify(token, event.senderId, event.messageId, 60);
+            log?.info(`[qqbot:${account.accountId}] Sent input notify to ${event.senderId}`);
+          } catch (err) {
+            log?.error(`[qqbot:${account.accountId}] Failed to send input notify: ${err}`);
+          }
+        }
+
         pluginRuntime.channel.activity.record({
           channel: "qqbot",
           accountId: account.accountId,