Method onMsg

fbi/fbi.ts:337–393

(msg: Api.Message)

    return targetId ? { id: targetId, name } : null;
  }

  /* ====== cs (zero-request, reads cache) ====== */

  private async doDet(msg: Api.Message, args: string[]) {
    if (!this.cacheReady) {
      await msg.edit({ text: "⏳ 缓存正在初始化，请稍后再试。", parseMode: "html" });
      return;
    }
    const target = await this.resolveTarget(msg, args);
    if (!target) {
      await msg.edit({ text: "❌ 无法识别目标，请回复消息或提供用户名/ID", parseMode: "html" });
      return;
    }

    await msg.edit({ text: `🔍 正在搜索嫌疑人 ${target.name} 的蛛丝马迹...`, parseMode: "html" });

    let found: { msg: CachedMsg; peer: string } | null = null;

    for (const [peer, chat] of this.chatCache) {
      for (const m of chat.msgs) {
        if (String(m.senderId) === target.id) {
          if (!found || m.date > found.msg.date) found = { msg: m, peer };
          break; // newest msg in this group, move on
        }
      }
    }

    await msg.delete().catch(() => {});

    if (!found) {
      await this.sendReply(msg, `🤦‍♀ 暂时没发现 ${target.name} 有作案嫌疑。`);
      return;
    }

    // build link from cache, no API call needed
    const chat = this.chatCache.get(found.peer)!;
    const text = htmlEsc((found.msg.text || "").slice(0, 50) || "[媒体消息]");
    const link = chat.username
      ? `<a href="https://t.me/${chat.username}/${found.msg.id}">${text}</a>`
      : `<a href="https://t.me/c/${peelChatId(found.peer)}/${found.msg.id}">${text}</a>`;
    await this.sendReply(msg, `👀 发现嫌疑人 ${target.name} 的作案现场：\n\n${link}\n\n<i>要想人不知除非己莫为。</i>`);
  }

  /* ====== sv ====== */

  private async doSur(msg: Api.Message, args: string[]) {
    const cl = await getGlobalClient();
    if (!cl) return;
    const target = await this.resolveTarget(msg, args);
    if (!target) {
      await msg.edit({ text: "❌ 无法识别目标", parseMode: "html" });
      return;
    }

    await msg.edit({ text: `👁️ 正在对嫌疑人 ${target.name} 进行蹲守...`, parseMode: "html" });

    this.sv.set(target.id, {
      targetId: target.id,