fix(core): 🐛 优化管理员消息转发逻辑

重构管理员回复处理机制，引入 withReplyTarget 函数用于统一处理回复目标 ID 的校验与构建。新增 deliverAdminMessageToUser 异步函数，封装了将管理员回复内容投递给特定用户的核心逻辑，提高了代码的可读性和可维护性。

主要变更：
- 修复了管理员回复逻辑中的状态校验与参数提取
- 优化了对回复目标 ID 的数值解析与有效性检查
- 简化了向目标用户发送文本或媒体消息的调用流程

telegram/tg-bot.js

@@ -931,6 +931,71 @@ async function handleBackup(msg, meta, env) {
 }
 
 // --- 6. 管理员功能模块 (双向交互枢纽) ---
+const withReplyTarget = (replyToMsgId) => {
+    const id = parseInt(replyToMsgId);
+    return Number.isFinite(id) ? { reply_to_message_id: id } : {};
+};
+
+async function deliverAdminMessageToUser(msg, uid, replyToMsgId, env) {
+    const reply = withReplyTarget(replyToMsgId);
+    const base = { chat_id: uid, ...reply };
+
+    if (msg.text) {
+        const body = { ...base, text: msg.text };
+        if (msg.entities) body.entities = msg.entities;
+        return api(env.BOT_TOKEN, "sendMessage", body);
+    }
+
+    if (msg.photo) {
+        const body = { ...base, photo: msg.photo[msg.photo.length - 1].file_id };
+        if (msg.caption) body.caption = msg.caption;
+        if (msg.caption_entities) body.caption_entities = msg.caption_entities;
+        return api(env.BOT_TOKEN, "sendPhoto", body);
+    }
+
+    const mediaMap = [
+        ["animation", "sendAnimation", "animation"],
+        ["video", "sendVideo", "video"],
+        ["document", "sendDocument", "document"],
+        ["audio", "sendAudio", "audio"],
+        ["voice", "sendVoice", "voice"],
+        ["video_note", "sendVideoNote", "video_note"],
+        ["sticker", "sendSticker", "sticker"]
+    ];
+
+    for (const [field, method, param] of mediaMap) {
+        if (!msg[field]) continue;
+        const body = { ...base, [param]: msg[field].file_id };
+        if (msg.caption) body.caption = msg.caption;
+        if (msg.caption_entities) body.caption_entities = msg.caption_entities;
+        return api(env.BOT_TOKEN, method, body);
+    }
+
+    if (msg.location) {
+        return api(env.BOT_TOKEN, "sendLocation", {
+            ...base,
+            latitude: msg.location.latitude,
+            longitude: msg.location.longitude
+        });
+    }
+
+    if (msg.contact) {
+        return api(env.BOT_TOKEN, "sendContact", {
+            ...base,
+            phone_number: msg.contact.phone_number,
+            first_name: msg.contact.first_name,
+            last_name: msg.contact.last_name || ""
+        });
+    }
+
+    return api(env.BOT_TOKEN, "copyMessage", {
+        chat_id: uid,
+        from_chat_id: msg.chat.id,
+        message_id: msg.message_id,
+        ...reply
+    });
+}
+
 async function handleAdminReply(msg, env) {
     if (!msg.message_thread_id || msg.from.is_bot || !(await isAuthAdmin(msg.from.id, env))) return;
 
@@ -968,14 +1033,21 @@ async function handleAdminReply(msg, env) {
     }
 
     try {
-        const sent = await api(env.BOT_TOKEN, "copyMessage", { chat_id: uid, from_chat_id: msg.chat.id, message_id: msg.message_id, reply_to_message_id: replyToMsgId });
+        const sent = await deliverAdminMessageToUser(msg, uid, replyToMsgId, env);
         if (sent && sent.message_id) {
             const storeText = msg.text || msg.caption || "[Admin Message]";
             await sql(env, "INSERT OR REPLACE INTO messages (user_id, message_id, text, date, topic_message_id) VALUES (?,?,?,?,?)",
                 [uid, sent.message_id.toString(), storeText, msg.date || Math.floor(Date.now() / 1000), msg.message_id.toString()]);
         }
         // 此处为管理员端给用户下发消息的主逻辑。根据之前的版本，管理员侧发送成功后的回执代码也已经去除
-    } catch (e) { await api(env.BOT_TOKEN, "sendMessage", { chat_id: msg.chat.id, message_thread_id: msg.message_thread_id, text: "❌ 内部投递失败" }); }
+    } catch (e) {
+        console.error("Admin Delivery Failed:", e);
+        await api(env.BOT_TOKEN, "sendMessage", {
+            chat_id: msg.chat.id,
+            message_thread_id: msg.message_thread_id,
+            text: `❌ 内部投递失败：${e.message || "Unknown error"}`
+        });
+    }
 }
 
 async function handleEdit(msg, env) {