diff --git a/server/public/admin/ai-chat-icon.png b/server/public/admin/ai-chat-icon.png
new file mode 100644
index 00000000..1b5a75d1
Binary files /dev/null and b/server/public/admin/ai-chat-icon.png differ
diff --git a/server/public/admin/index.html b/server/public/admin/index.html
index 8d2475dc..4d5da7a2 100644
--- a/server/public/admin/index.html
+++ b/server/public/admin/index.html
@@ -60,6 +60,109 @@
                 document.head.appendChild(link);
             })();
         </script>
+        <!-- Dify AI 客服机器人（全局悬浮气泡） -->
+        <script>
+            window.difyChatbotConfig = {
+                token: 'OcRvj5VVR76cME9J',
+                baseUrl: 'http://chat.zhenyangtang.com.cn:8088/',
+                draggable: true,
+                dragAxis: 'both',
+                inputs: {},
+                systemVariables: {},
+                userVariables: {}
+            }
+        </script>
+        <script
+            src="http://chat.zhenyangtang.com.cn:8088/embed.min.js"
+            id="OcRvj5VVR76cME9J"
+            defer
+        ></script>
+        <style>
+            /* 气泡按钮使用自定义 AI 图标（base 为 /admin/，public 资源在该路径下） */
+            #dify-chatbot-bubble-button {
+                background-color: #fff !important;
+                background-image: url('/admin/ai-chat-icon.png');
+                background-size: cover;
+                background-position: center;
+                background-repeat: no-repeat;
+            }
+            /* 隐藏 embed.min.js 内置的笑脸/关闭 SVG 图标 */
+            #dify-chatbot-bubble-button svg {
+                display: none !important;
+            }
+            /* 聊天窗口 iframe 默认透明。小窗口布局顶栏是白色文字，
+               顶部 56px 垫深蓝衬托，下方近白作聊天区底色 */
+            #dify-chatbot-bubble-window {
+                background: linear-gradient(
+                    to bottom,
+                    #1c64f2 0,
+                    #1c64f2 56px,
+                    #f7f8fc 56px
+                ) !important;
+            }
+            /* 全屏（宽屏布局）顶栏是深色文字，用整片近白底色 */
+            #dify-chatbot-bubble-window.dify-chatbot-fullscreen {
+                background: #f7f8fc !important;
+            }
+            /* 全屏态：#dify-chatbot-bubble-window 是 iframe 本身，用 !important 覆盖其内联样式 */
+            #dify-chatbot-bubble-window.dify-chatbot-fullscreen {
+                position: fixed !important;
+                top: 0 !important;
+                left: 0 !important;
+                right: 0 !important;
+                bottom: 0 !important;
+                width: 100vw !important;
+                height: 100vh !important;
+                max-width: 100vw !important;
+                max-height: 100vh !important;
+                min-width: 0 !important;
+                min-height: 0 !important;
+                border-radius: 0 !important;
+            }
+            /* 聊天窗口控制按钮（全屏切换 / 关闭），仅窗口打开时显示，位置由脚本计算 */
+            #dify-fullscreen-toggle,
+            #dify-chat-close {
+                position: fixed;
+                display: none;
+                width: 32px;
+                height: 32px;
+                border: none;
+                border-radius: 8px;
+                background-color: rgba(255, 255, 255, 0.18);
+                color: #fff;
+                font-size: 16px;
+                line-height: 32px;
+                text-align: center;
+                cursor: pointer;
+                z-index: 2147483646;
+            }
+            #dify-fullscreen-toggle:hover,
+            #dify-chat-close:hover {
+                background-color: rgba(255, 255, 255, 0.35);
+            }
+            /* 全屏时顶栏是浅色的，按钮改用实色圆形放在左上角 */
+            #dify-fullscreen-toggle.is-fullscreen,
+            #dify-chat-close.is-fullscreen {
+                width: 40px;
+                height: 40px;
+                border-radius: 20px;
+                background-color: #1c64f2;
+                box-shadow: rgba(0, 0, 0, 0.2) 0 4px 8px 0;
+                line-height: 40px;
+            }
+            #dify-fullscreen-toggle.is-fullscreen:hover,
+            #dify-chat-close.is-fullscreen:hover {
+                background-color: #1a56db;
+            }
+            /* 遮盖聊天窗口底部的 POWERED BY Dify 版权条（该区域在 iframe 内部，只能覆盖） */
+            #dify-brand-cover,
+            #dify-brand-transition-cover {
+                position: fixed;
+                display: none;
+                background: #f2f4f7;
+                z-index: 2147483641;
+            }
+        </style>
       <script type="module" crossorigin src="/admin/assets/index-d3j0BX4t.js"></script>
       <link rel="modulepreload" crossorigin href="/admin/assets/@babel/runtime-BanGtE2-.js">
       <link rel="modulepreload" crossorigin href="/admin/assets/fflate-_ayOYiT1.js">
@@ -109,5 +212,185 @@
                 </svg>
             </div>
         </div>

+        <script>
+            // Dify 聊天窗口全屏切换：#dify-chatbot-bubble-window 是 iframe 本身，
+            // 无法往其内部挂按钮，故在气泡旁放一个独立按钮，窗口打开时才显示
+            (function () {
+                var btn = document.createElement('button')
+                btn.type = 'button'
+                btn.id = 'dify-fullscreen-toggle'
+                btn.title = '全屏 / 还原'
+                btn.textContent = '⛶'
+                var transitionUntil = 0
+                // 全屏切换（放大和还原都算）后的过渡期：Dify 内部重排期间版权位置不定，
+                // 用大面积遮盖兜底，并逐帧跟踪窗口尺寸动画
+                function startTransition() {
+                    transitionUntil = Date.now() + TRANSITION_MS
+                    function loop() {
+                        sync()
+                        if (Date.now() < transitionUntil) requestAnimationFrame(loop)
+                    }
+                    loop()
+                }
+                btn.addEventListener('click', function () {
+                    var win = document.getElementById('dify-chatbot-bubble-window')
+                    if (!win) return
+                    win.classList.toggle('dify-chatbot-fullscreen')
+                    startTransition()
+                })
+                document.body.appendChild(btn)
+
+                // 自定义关闭按钮：窗口打开时气泡被隐藏，由它代替气泡的关闭功能
+                var closeBtn = document.createElement('button')
+                closeBtn.type = 'button'
+                closeBtn.id = 'dify-chat-close'
+                closeBtn.title = '关闭'
+                closeBtn.textContent = '✕'
+                closeBtn.addEventListener('click', function () {
+                    var win = document.getElementById('dify-chatbot-bubble-window')
+                    var difyBubble = document.getElementById('dify-chatbot-bubble-button')
+                    if (win) win.classList.remove('dify-chatbot-fullscreen')
+                    // 复用 embed.min.js 的开关逻辑，保证气泡图标状态同步
+                    if (difyBubble) difyBubble.click()
+                    sync()
+                })
+                document.body.appendChild(closeBtn)
+
+                // 隐藏 Dify 头部自带的展开按钮：该按钮仅在收到 isToggledByButton:true 时渲染
+                // （embed.min.js 默认发送），在其后补发 false 覆盖即可
+                var DIFY_ORIGIN = 'http://chat.zhenyangtang.com.cn:8088'
+                window.addEventListener('message', function (event) {
+                    if (event.origin !== DIFY_ORIGIN) return
+                    if (!event.data || event.data.type !== 'dify-chatbot-iframe-ready') return
+                    var win = document.getElementById('dify-chatbot-bubble-window')
+                    if (!win || event.source !== win.contentWindow) return
+                    setTimeout(function () {
+                        win.contentWindow.postMessage(
+                            {
+                                type: 'dify-chatbot-config',
+                                payload: { isToggledByButton: false, isDraggable: false }
+                            },
+                            DIFY_ORIGIN
+                        )
+                    }, 200)
+                })
+
+                var cover = document.createElement('div')
+                cover.id = 'dify-brand-cover'
+                document.body.appendChild(cover)
+                var transitionCover = document.createElement('div')
+                transitionCover.id = 'dify-brand-transition-cover'
+                document.body.appendChild(transitionCover)
+
+                var BRAND_BAR_HEIGHT = 38
+                // 全屏后 Dify 内部布局重排的过渡时长，期间用大面积遮盖兜底
+                var TRANSITION_MS = 1500
+                // Dify 宽屏布局断点 40rem：窄窗口版权条在底部，宽窗口（展开/全屏）移到顶栏右侧
+                var WIDE_BREAKPOINT = 640
+
+                function sync() {
+                    var win = document.getElementById('dify-chatbot-bubble-window')
+                    var opened = win && win.style.display !== 'none'
+                    var difyBubble = document.getElementById('dify-chatbot-bubble-button')
+                    btn.style.display = opened ? 'block' : 'none'
+                    closeBtn.style.display = opened ? 'block' : 'none'
+                    if (!opened) {
+                        cover.style.display = 'none'
+                        transitionCover.style.display = 'none'
+                        // 窗口关闭后恢复气泡（可拖动）
+                        if (difyBubble) difyBubble.style.display = ''
+                        return
+                    }
+                    var rect = win.getBoundingClientRect()
+                    var fullscreen = win.classList.contains('dify-chatbot-fullscreen')
+                    var inTransition = Date.now() < transitionUntil
+                    cover.style.display = 'block'
+                    // 窗口打开期间隐藏气泡（气泡可能被拖到任意位置，浮在窗口上很突兀），
+                    // 控制按钮统一停靠在窗口顶栏
+                    if (difyBubble) difyBubble.style.display = 'none'
+                    btn.classList.toggle('is-fullscreen', fullscreen)
+                    closeBtn.classList.toggle('is-fullscreen', fullscreen)
+                    if (fullscreen) {
+                        // 全屏：实色圆钮放左上角，避开右上角版权遮盖区和底部输入区
+                        btn.style.top = '12px'
+                        btn.style.left = '12px'
+                        closeBtn.style.top = '12px'
+                        closeBtn.style.left = '60px'
+                    } else {
+                        // 小窗口：白色幽灵按钮停靠在蓝色顶栏右侧，避开 iframe 内部右上角的重置按钮
+                        btn.style.top = rect.top + 12 + 'px'
+                        btn.style.left = rect.right - 132 + 'px'
+                        closeBtn.style.top = rect.top + 12 + 'px'
+                        closeBtn.style.left = rect.right - 92 + 'px'
+                    }
+                    if (inTransition) {
+                        // 过渡期：版权可能出现在顶部或底部，两处都盖住并跟随窗口动画；
+                        // 顶部遮盖的配色须与当前状态的 iframe 背景一致
+                        cover.style.left = rect.left + 'px'
+                        cover.style.top = rect.top + 'px'
+                        cover.style.width = rect.width + 'px'
+                        cover.style.height = '100px'
+                        cover.style.borderRadius = fullscreen ? '0' : '1rem 1rem 0 0'
+                        cover.style.background = fullscreen
+                            ? '#f7f8fc'
+                            : 'linear-gradient(to bottom, #1c64f2 0, #1c64f2 56px, #f7f8fc 56px)'
+                        transitionCover.style.display = 'block'
+                        transitionCover.style.left = rect.left + 'px'
+                        transitionCover.style.top = rect.bottom - BRAND_BAR_HEIGHT + 'px'
+                        transitionCover.style.bottom = 'auto'
+                        transitionCover.style.width = rect.width + 'px'
+                        transitionCover.style.height = BRAND_BAR_HEIGHT + 'px'
+                        transitionCover.style.background = '#f7f8fc'
+                        return
+                    }
+                    transitionCover.style.display = 'none'
+                    if (fullscreen) {
+                        // 全屏：版权信息在顶栏右侧，遮到窗口右边缘
+                        cover.style.left = rect.right - 390 + 'px'
+                        cover.style.top = rect.top + 'px'
+                        cover.style.width = '390px'
+                        cover.style.height = '56px'
+                        cover.style.borderRadius = '0'
+                        cover.style.background = '#f7f8fc'
+                    } else if (rect.width >= WIDE_BREAKPOINT) {
+                        // 宽窗口（浏览器缩放等场景）：版权信息在顶栏右侧
+                        cover.style.left = rect.right - 390 + 'px'
+                        cover.style.top = rect.top + 'px'
+                        cover.style.width = '390px'
+                        cover.style.height = '84px'
+                        cover.style.borderRadius = '0'
+                        cover.style.background = '#f7f8fc'
+                    } else {
+                        // 窄窗口布局：版权条横贯底部
+                        cover.style.left = rect.left + 'px'
+                        cover.style.top = rect.bottom - BRAND_BAR_HEIGHT + 'px'
+                        cover.style.width = rect.width + 'px'
+                        cover.style.height = BRAND_BAR_HEIGHT + 'px'
+                        cover.style.borderRadius = '0 0 1rem 1rem'
+                        cover.style.background = '#f2f4f7'
+                    }
+                }
+                // 监听 iframe 的创建及 display 切换（embed.min.js 通过内联 style 开关窗口），
+                // 再加低频轮询兜底，跟住窗口尺寸过渡动画和视口变化
+                var observer = new MutationObserver(sync)
+                observer.observe(document.body, {
+                    childList: true,
+                    subtree: true,
+                    attributes: true,
+                    attributeFilter: ['style', 'class']
+                })
+                window.addEventListener('resize', sync)
+                window.addEventListener('keydown', function (event) {
+                    if (event.key !== 'Escape') return
+                    var win = document.getElementById('dify-chatbot-bubble-window')
+                    if (win && win.classList.contains('dify-chatbot-fullscreen')) {
+                        win.classList.remove('dify-chatbot-fullscreen')
+                        startTransition()
+                    }
+                })
+                setInterval(sync, 300)
+                sync()
+            })()
+        </script>
     </body>
 </html>