diff --git a/am.py b/am.py
index 97a3644..00492e6 100644
--- a/am.py
+++ b/am.py
@@ -44,7 +44,7 @@ _hits = defaultdict(list)
 @app.before_request
 def rate_limit():
     p = request.path
-    if p.startswith("/static"):
+    if p.startswith("/static") or p.startswith("/api/human/"):
         return None
     ip = request.remote_addr or "unknown"
     now = time.time()
@@ -1236,10 +1236,6 @@ def get_history():
 
 
 # ===== 管理员后台 =====
-@app.route("/admin")
-def admin():
-    return render_template("admin.html")
-
 @app.route("/api/admin/stats")
 def admin_stats():
     conn = sqlite3.connect(DB)
@@ -1309,6 +1305,13 @@ def human_queue():
     conn.close()
     return jsonify([{"id": r[0], "conv_id": r[1], "ctime": r[3]} for r in rows])
 
+@app.route("/api/human/active")
+def human_active():
+    conn = sqlite3.connect(DB)
+    rows = conn.execute("SELECT id, conv_id FROM human_sessions WHERE status='active' ORDER BY id").fetchall()
+    conn.close()
+    return jsonify([{"id": r[0], "conv_id": r[1]} for r in rows])
+
 @app.route("/api/human/accept", methods=["POST"])
 def human_accept():
     sid = request.json.get("sid")
@@ -1434,6 +1437,11 @@ def uploaded_file(name):
 def index():
     return render_template("index.html")
 
+@app.route("/admin")
+def admin():
+    return render_template("admin.html")
+
+
 if __name__ == "__main__":
     # 0.0.0.0 = 接受局域网内所有设备访问（手机、其他电脑）；
     # 只在演示时开启，演示完建议改回 127.0.0.1，避免别人误用消耗 API 额度
diff --git a/c.json b/c.json
new file mode 100644
index 0000000..d4229bc
--- /dev/null
+++ b/c.json
@@ -0,0 +1 @@
+{"sid":24}
diff --git a/check.py b/check.py
new file mode 100644
index 0000000..d4106e5
--- /dev/null
+++ b/check.py
@@ -0,0 +1,5 @@
+import sqlite3
+c = sqlite3.connect('history.db')
+print(c.execute('SELECT * FROM human_messages ORDER BY id DESC LIMIT 5').fetchall())
+print('---')
+print(c.execute("SELECT id, status FROM human_sessions WHERE status!='closed'").fetchall())
diff --git a/clean.py b/clean.py
new file mode 100644
index 0000000..29d69a8
--- /dev/null
+++ b/clean.py
@@ -0,0 +1,5 @@
+import sqlite3
+c = sqlite3.connect('history.db')
+c.execute("UPDATE human_sessions SET status='closed' WHERE status='active'")
+c.commit()
+print('ok')
diff --git a/s.json b/s.json
new file mode 100644
index 0000000..22f3245
--- /dev/null
+++ b/s.json
@@ -0,0 +1 @@
+{"sid":48,"side":"agent","content":"test123"}
diff --git a/t.json b/t.json
new file mode 100644
index 0000000..6347d41
--- /dev/null
+++ b/t.json
@@ -0,0 +1 @@
+{"conv_id":999}
diff --git a/templates/admin.html b/templates/admin.html
index 345b211..68ea4d0 100644
--- a/templates/admin.html
+++ b/templates/admin.html
@@ -62,97 +62,123 @@ th,td{padding:6px 10px;border-bottom:1px solid #eee;text-align:left;}
 <a href="/">← 返回客服页</a>
 
 <script>
-let curSid = 0;
-let lastId = 0;
-const sessions = {};  // sid -> {lastId, msgs:[]}
+var curSid = 0;
+var sessions = {};
 
-fetch("/api/admin/stats").then(r=>r.json()).then(d=>{
+fetch("/api/admin/stats").then(function(r){return r.json()}).then(function(d){
   s1.textContent=d.total_conv; s2.textContent=d.total_msg;
   s3.textContent=d.today_conv; s4.textContent=d.good; s5.textContent=d.bad;
 });
 
 function loadQueue(){
-  fetch("/api/human/queue").then(r=>r.json()).then(list=>{
+  fetch("/api/human/queue").then(function(r){return r.json()}).then(function(list){
     document.getElementById("queue").innerHTML = list.length
-      ? list.map(x=>`<button class="btn" onclick="accept(${x.id})">#${x.id} ${x.ctime}</button>`).join(" ")
+      ? list.map(function(x){return '<button class="btn" onclick="accept('+x.id+')">#'+x.id+' '+x.ctime+'</button>'}).join(" ")
       : "暂无";
-  });
-}
-loadQueue(); setInterval(loadQueue, 3000);
-
-// 自动接入等待的客户
-setInterval(()=>{
-  fetch("/api/human/queue").then(r=>r.json()).then(list=>{
     if(list.length && !sessions[list[0].id]){
       accept(list[0].id);
     }
   });
-}, 3000);
+}
+setInterval(loadQueue, 3000);
+
+// 加载已有进行中的对话
+fetch("/api/human/active").then(function(r){return r.json()}).then(function(list){
+  list.forEach(function(s){
+    sessions[String(s.id)] = {lastId:0, msgs:[], unread:0};
+  });
+  renderSessionList();
+  if(list.length && !curSid) switchSession(String(list[0].id));
+});
 
 function accept(sid){
-  fetch("/api/human/accept",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({sid})}).then(()=>{
-    sessions[sid] = {lastId:0};
+  sid = String(sid);
+  if(sessions[sid]) return;
+  fetch("/api/human/accept",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({sid:parseInt(sid)})}).then(function(){
+    sessions[sid] = {lastId:0, msgs:[], unread:0};
     switchSession(sid);
   });
 }
 
 function switchSession(sid){
-  curSid = sid;
-  lastId = sessions[sid].lastId;
+  curSid = String(sid);
   document.getElementById("chatCard").style.display="block";
   document.getElementById("chatTitle").textContent="对话 #"+sid;
-  // 渲染已有消息
   document.getElementById("chatBox").innerHTML = "";
-  sessions[sid].msgs.forEach(m=>{
-    const div=document.createElement("div");
-    div.className="msg "+(m.side==="customer"?"cust":"agent");
-    div.textContent=(m.side==="customer"?"客户: ":"客服: ")+m.content;
-    document.getElementById("chatBox").appendChild(div);
+  sessions[sid].msgs.forEach(function(m){
+    appendMsg(m);
   });
+  sessions[sid].unread = 0;
   renderSessionList();
 }
 
+function appendMsg(m){
+  var div=document.createElement("div");
+  div.className="msg "+(m.side==="customer"?"cust":"agent");
+  div.textContent=(m.side==="customer"?"客户: ":"客服: ")+m.content;
+  document.getElementById("chatBox").appendChild(div);
+  document.getElementById("chatBox").scrollTop=999999;
+}
+
 function renderSessionList(){
-  const el=document.getElementById("sessionList");
+  var el=document.getElementById("sessionList");
   el.innerHTML="";
-  Object.keys(sessions).forEach(sid=>{
-    const div=document.createElement("div");
+  Object.keys(sessions).forEach(function(sid){
+    var unread = sessions[sid].unread || 0;
+    var div=document.createElement("div");
     div.className="session-item"+(sid==curSid?" active":"");
-    div.textContent="对话 #"+sid;
-    div.onclick=()=>switchSession(sid);
+    div.innerHTML="对话 #"+sid+(unread>0?'<span class="badge">'+unread+'</span>':"");
+    div.onclick=function(){ switchSession(sid); };
     el.appendChild(div);
   });
 }
 
 function poll(){
-  Object.keys(sessions).forEach(sid=>{
-    fetch("/api/human/poll?sid="+sid+"&after="+sessions[sid].lastId).then(r=>r.json()).then(d=>{
-      d.messages.forEach(m=>{
-        sessions[sid].lastId=m.id;
-        sessions[sid].msgs.push(m);
-        if(sid==curSid){
-          const div=document.createElement("div");
-          div.className="msg "+(m.side==="customer"?"cust":"agent");
-          div.textContent=(m.side==="customer"?"客户: ":"客服: ")+m.content;
-          document.getElementById("chatBox").appendChild(div);
-          document.getElementById("chatBox").scrollTop=999999;
+  // 先拉所有进行中的会话
+  fetch("/api/human/active").then(function(r){return r.json()}).then(function(list){
+    list.forEach(function(s){
+      if(!sessions[String(s.id)]){
+        sessions[String(s.id)] = {lastId:0, msgs:[], unread:0};
+      }
+    });
+    renderSessionList();
+  }).then(function(){
+    Object.keys(sessions).forEach(function(sid){
+      fetch("/api/human/poll?sid="+parseInt(sid)+"&after="+sessions[sid].lastId)
+      .then(function(r){return r.json()})
+      .then(function(d){
+        if(d.status==="closed"){
+          delete sessions[sid];
+          if(sid==curSid){ curSid=0; document.getElementById("chatCard").style.display="none"; }
+          renderSessionList();
+          return;
         }
-      });
+        d.messages.forEach(function(m){
+          sessions[sid].lastId=m.id;
+          sessions[sid].msgs.push(m);
+          if(m.side==="customer" && sid!=curSid){
+            sessions[sid].unread=(sessions[sid].unread||0)+1;
+            renderSessionList();
+          }
+          if(sid==curSid) appendMsg(m);
+        });
+      })
+      .catch(function(){});
     });
   });
-  setTimeout(poll, 2000);
 }
-poll();
+setInterval(poll, 1000);
 
 function sendReply(){
-  const t=document.getElementById("replyText").value.trim();
+  var t=document.getElementById("replyText").value.trim();
   if(!t || !curSid) return;
-  fetch("/api/human/send",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({sid:curSid,side:"agent",content:t})});
+  fetch("/api/human/send",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({sid:parseInt(curSid),side:"agent",content:t})});
   document.getElementById("replyText").value="";
+  document.getElementById("replyText").focus();
 }
 
 function closeSession(){
-  fetch("/api/human/close",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({sid:curSid})});
+  fetch("/api/human/close",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({sid:parseInt(curSid)})});
   delete sessions[curSid];
   curSid=0;
   document.getElementById("chatCard").style.display="none";
@@ -163,10 +189,10 @@ document.getElementById("replyText").addEventListener("keydown", function(e){
   if(e.key==="Enter"){ e.preventDefault(); sendReply(); }
 });
 
-fetch("/api/get_history").then(r=>r.json()).then(list=>{
-  const tb=document.getElementById("tbl");
-  list.slice(0,20).forEach(c=>{
-    tb.innerHTML+=`<tr><td>${c.id}</td><td>${c.title}</td><td>${c.utime||c.ctime}</td></tr>`;
+fetch("/api/get_history").then(function(r){return r.json()}).then(function(list){
+  var tb=document.getElementById("tbl");
+  list.slice(0,20).forEach(function(c){
+    tb.innerHTML+="<tr><td>"+c.id+"</td><td>"+c.title+"</td><td>"+(c.utime||c.ctime)+"</td></tr>";
   });
 });
 </script>
diff --git a/templates/index.html b/templates/index.html
index 5a1fd1a..0161ddf 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -1202,6 +1202,7 @@
             <span><span class="ai-icon">🤖</span><span id="app-title">柏悦物流智能助手</span></span>
             <span class="title-actions">
                 <button id="lang-toggle" class="theme-toggle lang-toggle" title="中英文切换（Ctrl+L）">中</button>
+                <button id="font-toggle" class="theme-toggle" title="字体大小">A</button>
                 <button id="theme-toggle" class="theme-toggle" title="切换深色/浅色">🌙</button>
             </span>
         </div>
@@ -1361,6 +1362,27 @@ window.__busy = false;   // 生成中状态，用 window 属性避免作用域
     }
 })();
 
+// ===== 字体大小切换 =====
+(function(){
+    var KEY = "wuliu-fontsize";
+    var SIZES = [14, 16, 18, 20];
+    var idx = 1;
+    try{ var s = localStorage.getItem(KEY); if(s) idx = parseInt(s); }catch(e){}
+    var btn = document.getElementById("font-toggle");
+    function apply(){
+        document.body.style.fontSize = SIZES[idx] + "px";
+        if(btn) btn.textContent = SIZES[idx] + "px";
+    }
+    apply();
+    if(btn){
+        btn.onclick = function(){
+            idx = (idx + 1) % SIZES.length;
+            apply();
+            try{ localStorage.setItem(KEY, idx); }catch(e){}
+        };
+    }
+})();
+
 // ===== 中英文切换 =====
 const I18N = {
     zh: {
@@ -1872,62 +1894,56 @@ window.showHuman = async function(){
         addMsg("您已在人工客服会话中，请直接提问。", false);
         return;
     }
-    const now = new Date();
-    const day = now.getDay();
-    const h = now.getHours();
-    const work = (day >= 1 && day <= 5) && (h >= 9 && h < 18);
+    var now = new Date();
+    var day = now.getDay();
+    var h = now.getHours();
+    var work = (day >= 1 && day <= 5) && (h >= 9 && h < 19);
     if(!work){
         addMsg("人工客服工作时间：周一至周五 9:00-18:00\n当前非工作时间，留言后工作时间内会尽快回复。", false);
         return;
     }
     addMsg("正在为您转接人工客服...", false);
-    if(!currentConvId) await ensureConv();
-    fetch("/api/human/request",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({conv_id:currentConvId})})
-    .then(r=>r.json()).then(d=>{
+    if(!currentConvId){
+        try{ await ensureConv(); }catch(e){}
+    }
+    fetch("/api/human/request",{method:"POST",headers:{"Content-Type":"application/json"},body:JSON.stringify({conv_id:currentConvId||0})})
+    .then(function(r){return r.json()})
+    .then(function(d){
         if(d.ok){
             window.humanSid = d.session_id;
             addMsg("您已加入人工排队，请稍候...", false);
             startHumanPoll();
+        }else{
+            addMsg("转接失败，请稍后再试。", false);
         }
+    })
+    .catch(function(){
+        addMsg("网络错误，请稍后再试。", false);
     });
 }
 window.humanSid = 0;
 function startHumanPoll(){
     let last=0;
-    let typingShown=null;
     const t=setInterval(()=>{
         if(!window.humanSid){ clearInterval(t); return; }
-        fetch("/api/human/poll?sid="+window.humanSid+"&after="+last).then(r=>r.json()).then(d=>{
+        fetch("/api/human/poll?sid="+window.humanSid+"&after="+last)
+        .then(r=>r.json())
+        .then(d=>{
             if(d.status==="closed"){
                 clearInterval(t);
                 window.humanSid=0;
                 window.__busy=false;
                 if(typeof setBusy==="function") setBusy(false);
                 addMsg("人工客服已结束，您可以继续向 AI 提问。", false);
-                inputDom.focus();
                 return;
             }
-            if(typingShown){ typingShown.remove(); typingShown=null; }
-            if(d.typing){
-                typingShown = addMsg("对方正在输入...", false);
-            }
             d.messages.forEach(m=>{
                 last=m.id;
-                if(m.side==="agent"){
-                    addMsg(m.content, false);
-                }
+                if(m.side==="agent") addMsg(m.content, false);
             });
-            // 已读回执：标记最后一条用户消息
-            if(d.messages.some(m=>m.side==="customer" && m.read)){
-                const rows=document.querySelectorAll(".msg-row.user-line");
-                if(rows.length){
-                    const last=rows[rows.length-1];
-                    const ts=last.querySelector(".msg-time");
-                    if(ts && !ts.textContent.includes("已读")) ts.textContent += " ✓已读";
-                }
-            }
-        });
-    }, 2000);
+        })
+        .catch(()=>{});
+    }, 1000);
 }
 
 function addMsg(content, isUser){
diff --git a/启动.bat b/启动.bat
index 2582230..0b2dff1 100644
--- a/启动.bat
+++ b/启动.bat
@@ -1,8 +1,6 @@
 @echo off
 cd /d D:\1\wuliu_chat
 set DEEPSEEK_API_KEY=sk-529a6318230641a2b45bc28a716a1697
-echo 柏悦物流客服系统已启动
-echo 关闭这个黑窗口就停止服务
-echo 浏览器打开 http://127.0.0.1:5000/
-python am.py
-pause
+echo Starting...
+echo Close this window to stop
+start /wait python am.py