diff --git a/docs b/docs
index 077a803..9141c24 160000
--- a/docs
+++ b/docs
@@ -1 +1 @@
-Subproject commit 077a8032c58ca3837e3753e0195ab29b36f9b706
+Subproject commit 9141c24e391f4dcf2ef25762c13326b0f0829458
diff --git a/web/components/kefu/widget-demo.tsx b/web/components/kefu/widget-demo.tsx
index ce6465e..564ed4c 100644
--- a/web/components/kefu/widget-demo.tsx
+++ b/web/components/kefu/widget-demo.tsx
@@ -29,7 +29,9 @@ declare global {
     CSAgentWidget?: {
       mount: (config: KefuWidgetHostConfig) => void
       destroy: () => void
+      open: () => Promise<void>
       close: () => void
+      getChatUrl: () => Promise<string>
     }
   }
 }
@@ -86,14 +88,16 @@ function injectWidget(config: KefuWidgetHostConfig) {
   document.body.appendChild(script)
 }
 
-function buildWidgetConfig(config: WidgetDemoConfig, userToken: string): WidgetDemoConfig {
-  return {
-    ...config,
+function buildWidgetConfig(config: WidgetDemoConfig): KefuWidgetHostConfig {
+  const nextConfig: KefuWidgetHostConfig = {
     channelId: config.channelId.trim(),
     baseUrl: "",
     apiBaseUrl: "",
-    userToken,
   }
+  if (config.authMode === "jwt") {
+    nextConfig.getUserToken = () => signUserToken(config)
+  }
+  return nextConfig
 }
 
 async function signUserToken(config: WidgetDemoConfig) {
@@ -134,19 +138,23 @@ export function KefuWidgetDemo() {
   const [status, setStatus] = useState("请填写 channelId")
   const [origin, setOrigin] = useState("")
   const [generatedToken, setGeneratedToken] = useState("")
+  const [latestDirectChatUrl, setLatestDirectChatUrl] = useState("")
   const [copied, setCopied] = useState(false)
   const [snippetCopied, setSnippetCopied] = useState(false)
 
   async function mountWidget(configToMount: WidgetDemoConfig) {
-    let userToken = ""
-    if (configToMount.authMode === "jwt") {
-      userToken = await signUserToken(configToMount)
+    const cleanConfig = {
+      ...configToMount,
+      channelId: configToMount.channelId.trim(),
+      baseUrl: "",
+      apiBaseUrl: "",
+      getUserToken: undefined,
     }
-
-    const nextConfig = buildWidgetConfig(configToMount, userToken)
-    setConfig(nextConfig)
-    setGeneratedToken(userToken)
-    window.localStorage.setItem(STORAGE_KEY, JSON.stringify(nextConfig))
+    const nextConfig = buildWidgetConfig(cleanConfig)
+    setConfig(cleanConfig)
+    setGeneratedToken("")
+    setLatestDirectChatUrl("")
+    window.localStorage.setItem(STORAGE_KEY, JSON.stringify(cleanConfig))
 
     if (!nextConfig.channelId) {
       removeMountedWidget()
@@ -156,7 +164,7 @@ export function KefuWidgetDemo() {
 
     injectWidget(nextConfig)
     setStatus(
-      nextConfig.authMode === "jwt"
+      cleanConfig.authMode === "jwt"
         ? "Widget 已挂载：JWT 用户模式"
         : "Widget 已挂载：访客模式"
     )
@@ -173,7 +181,7 @@ export function KefuWidgetDemo() {
         void mountWidget(initialConfig).catch((error) => {
           removeMountedWidget()
           setGeneratedToken("")
-          setStatus(error instanceof Error ? error.message : "生成 userToken 失败")
+          setStatus(error instanceof Error ? error.message : "挂载 Widget 失败")
         })
       }
     }, 0)
@@ -191,7 +199,11 @@ export function KefuWidgetDemo() {
 
     const configLines = [`    channelId: "${config.channelId || ""}"`]
     if (config.authMode === "jwt") {
-      configLines.push(`    userToken: "${generatedToken || "业务系统后端签发的 JWT"}"`)
+      configLines.push(`    async getUserToken() {
+      const res = await fetch("/api/kefu/user-token", { credentials: "include" });
+      const data = await res.json();
+      return data.userToken;
+    }`)
     }
 
     return `<script>
@@ -200,22 +212,7 @@ ${configLines.join(",\n")}
   };
 </script>
 <script async src="${scriptSrc}"></script>`
-  }, [config, generatedToken, origin])
-
-  const directChatUrl = useMemo(() => {
-    const base = origin || ""
-    const channelId = (config.channelId || "").trim()
-    if (!base || !channelId) {
-      return ""
-    }
-
-    const url = new URL("/kefu/chat/", base)
-    url.searchParams.set("channelId", channelId)
-    if (config.authMode === "jwt" && generatedToken) {
-      url.searchParams.set("userToken", generatedToken)
-    }
-    return url.toString()
-  }, [config.authMode, config.channelId, generatedToken, origin])
+  }, [config.authMode, config.channelId, origin])
 
   function updateField<K extends keyof WidgetDemoConfig>(
     key: K,
@@ -230,17 +227,42 @@ ${configLines.join(",\n")}
     } catch (error) {
       removeMountedWidget()
       setGeneratedToken("")
-      setStatus(error instanceof Error ? error.message : "生成 userToken 失败")
+      setStatus(error instanceof Error ? error.message : "挂载 Widget 失败")
     }
   }
 
   async function handleCopyDirectUrl() {
-    if (!directChatUrl || typeof navigator === "undefined") {
+    if (!window.CSAgentWidget || typeof navigator === "undefined") {
       return
     }
-    await navigator.clipboard.writeText(directChatUrl)
-    setCopied(true)
-    window.setTimeout(() => setCopied(false), 1600)
+    try {
+      const url = await window.CSAgentWidget.getChatUrl()
+      setLatestDirectChatUrl(url)
+      if (config.authMode === "jwt") {
+        setGeneratedToken(new URL(url).searchParams.get("userToken") || "")
+      }
+      await navigator.clipboard.writeText(url)
+      setCopied(true)
+      window.setTimeout(() => setCopied(false), 1600)
+    } catch (error) {
+      setStatus(error instanceof Error ? error.message : "生成客服链接失败")
+    }
+  }
+
+  async function handleOpenDirectChat() {
+    if (!window.CSAgentWidget) {
+      return
+    }
+    try {
+      const url = await window.CSAgentWidget.getChatUrl()
+      setLatestDirectChatUrl(url)
+      if (config.authMode === "jwt") {
+        setGeneratedToken(new URL(url).searchParams.get("userToken") || "")
+      }
+      window.open(url, "_blank", "noopener,noreferrer")
+    } catch (error) {
+      setStatus(error instanceof Error ? error.message : "生成客服链接失败")
+    }
   }
 
   async function handleCopySnippet() {
@@ -353,13 +375,13 @@ ${configLines.join(",\n")}
             <div className="mt-2 flex flex-col gap-2 sm:flex-row">
               <input
                 readOnly
-                value={directChatUrl || "请先填写 channelId 并挂载"}
+                value={latestDirectChatUrl || "点击复制或新窗口打开时生成最新链接"}
                 className="h-9 min-w-0 flex-1 rounded-md border border-slate-200 px-3 font-mono text-xs outline-none"
               />
               <div className="flex gap-2">
                 <button
                   type="button"
-                  disabled={!directChatUrl}
+                  disabled={!config.channelId}
                   onClick={() => void handleCopyDirectUrl()}
                   className="rounded-md border border-slate-200 bg-white px-3 py-2 text-sm font-medium disabled:cursor-not-allowed disabled:opacity-50"
                 >
@@ -367,12 +389,8 @@ ${configLines.join(",\n")}
                 </button>
                 <button
                   type="button"
-                  disabled={!directChatUrl}
-                  onClick={() => {
-                    if (directChatUrl) {
-                      window.open(directChatUrl, "_blank", "noopener,noreferrer")
-                    }
-                  }}
+                  disabled={!config.channelId}
+                  onClick={() => void handleOpenDirectChat()}
                   className="rounded-md bg-slate-950 px-3 py-2 text-sm font-medium text-white disabled:cursor-not-allowed disabled:opacity-50"
                 >
                   新窗口打开
diff --git a/web/lib/kefu-host-bridge.ts b/web/lib/kefu-host-bridge.ts
index f7b7b78..9d27822 100644
--- a/web/lib/kefu-host-bridge.ts
+++ b/web/lib/kefu-host-bridge.ts
@@ -1,6 +1,6 @@
 import {
   setKefuWidgetConfig,
-  type KefuWidgetHostConfig,
+  type KefuWidgetRuntimeConfig,
 } from "@/lib/kefu-widget-config"
 
 type HostBridgeOptions = {
@@ -32,7 +32,7 @@ export function bindKefuHostBridge(options: HostBridgeOptions = {}) {
     const data = event.data as
       | {
           type?: string
-          payload?: KefuWidgetHostConfig | { isMaximized?: boolean }
+          payload?: KefuWidgetRuntimeConfig | { isMaximized?: boolean }
         }
       | undefined
     if (!data?.type) {
@@ -40,7 +40,7 @@ export function bindKefuHostBridge(options: HostBridgeOptions = {}) {
     }
 
     if (data.type === INIT_MESSAGE_TYPE && data.payload) {
-      setKefuWidgetConfig(data.payload as KefuWidgetHostConfig)
+      setKefuWidgetConfig(data.payload as KefuWidgetRuntimeConfig)
       options.onInit?.()
       return
     }
diff --git a/web/lib/kefu-widget-config.ts b/web/lib/kefu-widget-config.ts
index db4a141..c30f28a 100644
--- a/web/lib/kefu-widget-config.ts
+++ b/web/lib/kefu-widget-config.ts
@@ -6,8 +6,8 @@ export type KefuWidgetHostConfig = {
   externalId?: string
   /** 访客展示名，仅用于首次换取客服会话 token */
   externalName?: string
-  /** 业务系统签发的前台用户 JWT，仅用于首次换取客服会话 token */
-  userToken?: string
+  /** 打开客服前按需获取业务系统签发的前台用户 JWT */
+  getUserToken?: () => string | Promise<string>
   title?: string
   subtitle?: string
   position?: "left" | "right"
@@ -15,15 +15,20 @@ export type KefuWidgetHostConfig = {
   width?: string
 }
 
+export type KefuWidgetRuntimeConfig = Omit<KefuWidgetHostConfig, "getUserToken"> & {
+  /** 仅用于 /kefu/chat 运行时换取客服会话 token，不属于 CSAgentConfig 接入参数 */
+  userToken?: string
+}
+
 declare global {
   interface Window {
     CSAgentConfig?: KefuWidgetHostConfig
-    __CS_AGENT_WIDGET_CONFIG__?: KefuWidgetHostConfig
+    __CS_AGENT_WIDGET_CONFIG__?: KefuWidgetRuntimeConfig
     __CS_AGENT_WIDGET_STATE__?: unknown
   }
 }
 
-export function readKefuWidgetConfig(): KefuWidgetHostConfig {
+export function readKefuWidgetConfig(): KefuWidgetRuntimeConfig {
   if (typeof window === "undefined") {
     return {
       channelId: "",
@@ -33,7 +38,7 @@ export function readKefuWidgetConfig(): KefuWidgetHostConfig {
   }
 
   const query = new URLSearchParams(window.location.search)
-  const fallback: KefuWidgetHostConfig = {
+  const fallback: KefuWidgetRuntimeConfig = {
     channelId:
       query.get("channelId") ??
       process.env.NEXT_PUBLIC_OPEN_IM_CHANNEL_ID?.trim() ??
@@ -56,10 +61,20 @@ export function readKefuWidgetConfig(): KefuWidgetHostConfig {
     width: query.get("width") ?? undefined,
   }
 
-  return window.__CS_AGENT_WIDGET_CONFIG__ ?? window.CSAgentConfig ?? fallback
+  if (window.__CS_AGENT_WIDGET_CONFIG__) {
+    return window.__CS_AGENT_WIDGET_CONFIG__
+  }
+  if (window.CSAgentConfig) {
+    const { getUserToken: _getUserToken, ...hostConfig } = window.CSAgentConfig
+    return {
+      ...fallback,
+      ...hostConfig,
+    }
+  }
+  return fallback
 }
 
-export function setKefuWidgetConfig(config: KefuWidgetHostConfig) {
+export function setKefuWidgetConfig(config: KefuWidgetRuntimeConfig) {
   if (typeof window === "undefined") {
     return
   }
diff --git a/web/lib/sdk/cs-ai-agent-sdk.js b/web/lib/sdk/cs-ai-agent-sdk.js
index 6246ff7..c33fc0c 100644
--- a/web/lib/sdk/cs-ai-agent-sdk.js
+++ b/web/lib/sdk/cs-ai-agent-sdk.js
@@ -19,6 +19,7 @@
       frameHideTimer: null,
       frameDestroyTimer: null,
       config: null,
+      frameConfig: null,
       frameUrl: null,
       animationDuration: 260,
     };
@@ -49,8 +50,8 @@
     if (merged.externalId) {
       merged.externalId = String(merged.externalId);
     }
-    if (merged.userToken) {
-      merged.userToken = String(merged.userToken);
+    if (typeof merged.getUserToken !== "function") {
+      delete merged.getUserToken;
     }
     return merged;
   }
@@ -63,7 +64,7 @@
     return String(config.widgetBaseUrl || config.baseUrl || window.location.origin).replace(/\/$/, "");
   }
 
-  function createFrameUrl(config) {
+  function createFrameUrl(config, userToken) {
     var widgetBaseUrl = resolveWidgetBaseUrl(config);
     var frameUrl = new URL(widgetBaseUrl + "/kefu/chat/");
     frameUrl.searchParams.set("channelId", config.channelId);
@@ -71,10 +72,49 @@
     if (config.apiBaseUrl) frameUrl.searchParams.set("apiBaseUrl", config.apiBaseUrl);
     if (config.externalId) frameUrl.searchParams.set("externalId", config.externalId);
     if (config.externalName) frameUrl.searchParams.set("externalName", config.externalName);
-    if (config.userToken) frameUrl.searchParams.set("userToken", config.userToken);
+    if (userToken) frameUrl.searchParams.set("userToken", userToken);
     return frameUrl;
   }
 
+  function createFrameConfig(config, userToken) {
+    var payload = {};
+    var key;
+    for (key in config) {
+      if (
+        Object.prototype.hasOwnProperty.call(config, key) &&
+        key !== "getUserToken"
+      ) {
+        payload[key] = config[key];
+      }
+    }
+    if (userToken) {
+      payload.userToken = userToken;
+    }
+    return payload;
+  }
+
+  function resolveUserToken() {
+    var config = state.config || {};
+    if (typeof config.getUserToken !== "function") {
+      return Promise.resolve("");
+    }
+    try {
+      return Promise.resolve(config.getUserToken()).then(function (token) {
+        return String(token || "").trim();
+      });
+    } catch (error) {
+      return Promise.reject(error);
+    }
+  }
+
+  function prepareFrameUrl() {
+    return resolveUserToken().then(function (userToken) {
+      state.frameUrl = createFrameUrl(state.config, userToken);
+      state.frameConfig = createFrameConfig(state.config, userToken);
+      return state.frameUrl;
+    });
+  }
+
   function mergeWidgetConfig(config, remoteConfig) {
     if (!remoteConfig) {
       return config;
@@ -199,7 +239,7 @@
       state.initSent = true;
       postToFrame({
         type: "cs-agent:init",
-        payload: state.config,
+        payload: state.frameConfig || createFrameConfig(state.config, ""),
       });
     }
 
@@ -388,11 +428,13 @@
     button.appendChild(text);
 
     button.addEventListener("click", function () {
-      if (!state.frame) {
-        createFrame();
+      if (state.isOpen) {
+        state.isOpen = false;
+        syncFrameVisibility();
+        return;
       }
-      state.isOpen = !state.isOpen;
-      syncFrameVisibility();
+
+      openWidget();
     });
 
     document.body.appendChild(button);
@@ -416,7 +458,6 @@
     fetchWidgetConfig(state.config).then(function (nextConfig) {
       state.configLoading = false;
       state.config = normalizeConfig(nextConfig);
-      state.frameUrl = createFrameUrl(state.config);
       if (state.button && state.button.parentNode) {
         state.button.parentNode.removeChild(state.button);
         state.button = null;
@@ -441,25 +482,48 @@
     state.isOpen = false;
     state.isMaximized = false;
     state.configLoading = false;
+    state.frameConfig = null;
+    state.frameUrl = null;
+  }
+
+  function openWidget() {
+    return prepareFrameUrl()
+      .then(function () {
+        if (!state.frame) {
+          createFrame();
+        }
+        if (!state.frame) {
+          return;
+        }
+        state.isOpen = true;
+        syncFrameVisibility();
+      })
+      .catch(function (error) {
+        console.error("[cs-agent-widget] open failed", error);
+      });
   }
 
   window.CSAgentWidget = {
     mount: mount,
     destroy: destroy,
     open: function () {
-      if (!state.frame) {
-        createFrame();
-      }
-      if (!state.frame) {
-        return;
-      }
-      state.isOpen = true;
-      syncFrameVisibility();
+      return openWidget();
     },
     close: function () {
       state.isOpen = false;
       syncFrameVisibility();
     },
+    getChatUrl: function () {
+      if (!state.config) {
+        mount(window.CSAgentConfig || {});
+      }
+      if (!state.config || !state.config.channelId) {
+        return Promise.reject(new Error("channelId is required"));
+      }
+      return prepareFrameUrl().then(function (frameUrl) {
+        return frameUrl.toString();
+      });
+    },
   };
 
   if (!state.listenerBound) {
diff --git a/web/lib/sdk/cs-ai-agent-sdk.test.mjs b/web/lib/sdk/cs-ai-agent-sdk.test.mjs
new file mode 100644
index 0000000..6d8887f
--- /dev/null
+++ b/web/lib/sdk/cs-ai-agent-sdk.test.mjs
@@ -0,0 +1,134 @@
+import assert from "node:assert/strict"
+import { readFile } from "node:fs/promises"
+import test from "node:test"
+import vm from "node:vm"
+
+function createElement(tagName) {
+  return {
+    tagName,
+    children: [],
+    dataset: {},
+    style: {},
+    attributes: {},
+    listeners: {},
+    parentNode: null,
+    contentWindow: {},
+    setAttribute(name, value) {
+      this.attributes[name] = String(value)
+    },
+    appendChild(child) {
+      child.parentNode = this
+      this.children.push(child)
+      return child
+    },
+    removeChild(child) {
+      this.children = this.children.filter((item) => item !== child)
+      child.parentNode = null
+      return child
+    },
+    addEventListener(type, handler) {
+      this.listeners[type] = handler
+    },
+    click() {
+      this.listeners.click?.()
+    },
+  }
+}
+
+async function loadSdk(config) {
+  const source = await readFile(new URL("./cs-ai-agent-sdk.js", import.meta.url), "utf8")
+  const body = createElement("body")
+  const sandbox = {
+    URL,
+    console,
+    fetch: async () => ({
+      json: async () => ({
+        success: true,
+        data: {
+          title: "在线客服",
+          themeColor: "#2563eb",
+        },
+      }),
+    }),
+    document: {
+      body,
+      currentScript: {
+        src: "https://chat.example/sdk/cs-ai-agent-sdk.min.js",
+      },
+      createElement,
+      createElementNS: (_namespace, tagName) => createElement(tagName),
+    },
+    window: {
+      CSAgentConfig: config,
+      location: {
+        origin: "https://host.example",
+      },
+      addEventListener() {},
+      clearTimeout() {},
+      setTimeout(handler) {
+        handler()
+        return 1
+      },
+    },
+  }
+  sandbox.window.window = sandbox.window
+  sandbox.window.document = sandbox.document
+  sandbox.window.fetch = sandbox.fetch
+  sandbox.window.console = console
+  sandbox.window.URL = URL
+  sandbox.window.setTimeout = sandbox.window.setTimeout
+  sandbox.window.clearTimeout = sandbox.window.clearTimeout
+
+  vm.runInNewContext(source, sandbox)
+  await Promise.resolve()
+  await Promise.resolve()
+  return sandbox
+}
+
+async function flushPromises(count = 5) {
+  for (let i = 0; i < count; i += 1) {
+    await Promise.resolve()
+  }
+}
+
+test("getChatUrl resolves a fresh userToken for each call", async () => {
+  let calls = 0
+  const sandbox = await loadSdk({
+    channelId: "ch_1",
+    baseUrl: "https://api.example",
+    getUserToken: async () => `token_${++calls}`,
+  })
+
+  assert.equal(typeof sandbox.window.CSAgentWidget.getChatUrl, "function")
+
+  const first = await sandbox.window.CSAgentWidget.getChatUrl()
+  const second = await sandbox.window.CSAgentWidget.getChatUrl()
+
+  assert.equal(new URL(first).searchParams.get("userToken"), "token_1")
+  assert.equal(new URL(second).searchParams.get("userToken"), "token_2")
+  assert.equal(calls, 2)
+})
+
+test("launcher click creates chat iframe with a freshly resolved userToken", async () => {
+  const sandbox = await loadSdk({
+    channelId: "ch_1",
+    baseUrl: "https://api.example",
+    getUserToken: async () => "click_token",
+  })
+  await flushPromises()
+  const launcher = sandbox.document.body.children.find(
+    (child) => child.dataset.csAgentWidget === "launcher"
+  )
+
+  assert.ok(launcher)
+
+  launcher.click()
+  await flushPromises()
+
+  const frame = sandbox.document.body.children.find(
+    (child) => child.dataset.csAgentWidget === "frame"
+  )
+
+  assert.ok(frame)
+  assert.equal(new URL(frame.src).searchParams.get("userToken"), "click_token")
+})
diff --git a/web/public/sdk/cs-agent-widget.js b/web/public/sdk/cs-agent-widget.js
deleted file mode 100644
index 350d5c2..0000000
--- a/web/public/sdk/cs-agent-widget.js
+++ /dev/null
@@ -1,367 +0,0 @@
-(function () {
-  var DEFAULT_CONFIG = {
-    position: "right",
-    themeColor: "#0f6cbd",
-    width: "380px",
-  };
-
-  var state = window.__CS_AGENT_WIDGET_STATE__;
-  if (!state) {
-    state = {
-      button: null,
-      frame: null,
-      frameLoaded: false,
-      frameReady: false,
-      initSent: false,
-      isOpen: false,
-      isMaximized: false,
-      frameHideTimer: null,
-      frameDestroyTimer: null,
-      config: null,
-      frameUrl: null,
-      animationDuration: 260,
-    };
-    window.__CS_AGENT_WIDGET_STATE__ = state;
-  }
-
-  function normalizeConfig(config) {
-    var merged = {};
-    var key;
-    for (key in DEFAULT_CONFIG) {
-      if (Object.prototype.hasOwnProperty.call(DEFAULT_CONFIG, key)) {
-        merged[key] = DEFAULT_CONFIG[key];
-      }
-    }
-    config = config || {};
-    for (key in config) {
-      if (Object.prototype.hasOwnProperty.call(config, key)) {
-        merged[key] = config[key];
-      }
-    }
-    merged.baseUrl = String(merged.baseUrl || window.location.origin).replace(/\/$/, "");
-    merged.apiBaseUrl = String(merged.apiBaseUrl || merged.baseUrl).replace(/\/$/, "");
-    merged.channelId = String(merged.channelId || "");
-    if (merged.externalId) {
-      merged.externalId = String(merged.externalId);
-    }
-    if (merged.userToken) {
-      merged.userToken = String(merged.userToken);
-    }
-    return merged;
-  }
-
-  function resolveWidgetBaseUrl(config) {
-    var currentScript = document.currentScript;
-    if (currentScript && currentScript.src) {
-      return currentScript.src.replace(/\/sdk\/cs-agent-widget\.js(?:\?.*)?$/, "");
-    }
-    return String(config.widgetBaseUrl || config.baseUrl || window.location.origin).replace(/\/$/, "");
-  }
-
-  function createFrameUrl(config) {
-    var widgetBaseUrl = resolveWidgetBaseUrl(config);
-    var frameUrl = new URL(widgetBaseUrl + "/kefu/chat/");
-    frameUrl.searchParams.set("channelId", config.channelId);
-    frameUrl.searchParams.set("baseUrl", config.baseUrl);
-    if (config.apiBaseUrl) frameUrl.searchParams.set("apiBaseUrl", config.apiBaseUrl);
-    if (config.title) frameUrl.searchParams.set("title", config.title);
-    if (config.subtitle) frameUrl.searchParams.set("subtitle", config.subtitle);
-    if (config.position) frameUrl.searchParams.set("position", config.position);
-    if (config.themeColor) frameUrl.searchParams.set("themeColor", config.themeColor);
-    if (config.width) frameUrl.searchParams.set("width", config.width);
-    if (config.externalId) frameUrl.searchParams.set("externalId", config.externalId);
-    if (config.externalName) frameUrl.searchParams.set("externalName", config.externalName);
-    if (config.userToken) frameUrl.searchParams.set("userToken", config.userToken);
-    return frameUrl;
-  }
-
-  function clearFrameTimers() {
-    if (state.frameHideTimer) {
-      window.clearTimeout(state.frameHideTimer);
-      state.frameHideTimer = null;
-    }
-    if (state.frameDestroyTimer) {
-      window.clearTimeout(state.frameDestroyTimer);
-      state.frameDestroyTimer = null;
-    }
-  }
-
-  function applyFrameLayout() {
-    var frame = state.frame;
-    var config = state.config;
-    if (!frame || !config) {
-      return;
-    }
-
-    frame.style.position = "fixed";
-    frame.style.border = "0";
-    frame.style.overflow = "hidden";
-    frame.style.background = "#fff";
-    frame.style.zIndex = "2147483000";
-    frame.style.boxShadow = "0 28px 80px rgba(15, 35, 65, 0.28)";
-    frame.style.willChange = "top,right,bottom,left,width,height,opacity,transform,border-radius";
-    frame.style.transition =
-      "top 260ms cubic-bezier(0.22, 1, 0.36, 1), right 260ms cubic-bezier(0.22, 1, 0.36, 1), bottom 260ms cubic-bezier(0.22, 1, 0.36, 1), left 260ms cubic-bezier(0.22, 1, 0.36, 1), width 260ms cubic-bezier(0.22, 1, 0.36, 1), height 260ms cubic-bezier(0.22, 1, 0.36, 1), opacity 220ms ease, transform 260ms cubic-bezier(0.22, 1, 0.36, 1), border-radius 260ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 260ms ease";
-    frame.style.transformOrigin =
-      config.position === "left" ? "left bottom" : "right bottom";
-
-    if (state.isMaximized) {
-      frame.style.top = "20px";
-      frame.style.right = "20px";
-      frame.style.bottom = "20px";
-      frame.style.left = "20px";
-      frame.style.width = "calc(100vw - 40px)";
-      frame.style.maxWidth = "none";
-      frame.style.height = "calc(100vh - 40px)";
-      frame.style.borderRadius = "24px";
-      return;
-    }
-
-    frame.style.top = "";
-    frame.style.bottom = "88px";
-    frame.style.right = config.position === "left" ? "" : "24px";
-    frame.style.left = config.position === "left" ? "24px" : "";
-    frame.style.width = config.width || "380px";
-    frame.style.maxWidth = "calc(100vw - 24px)";
-    frame.style.height = "min(760px, calc(100vh - 112px))";
-    frame.style.borderRadius = "28px";
-  }
-
-  function postToFrame(message) {
-    if (!state.frame || !state.frame.contentWindow || !state.frameUrl) {
-      return;
-    }
-    try {
-      state.frame.contentWindow.postMessage(message, state.frameUrl.origin);
-    } catch (error) {
-      console.error("[cs-agent-widget] postMessage failed", error);
-    }
-  }
-
-  function flushFrameState() {
-    if (!state.frame || !state.frameLoaded || !state.frameReady) {
-      return;
-    }
-
-    if (!state.initSent) {
-      state.initSent = true;
-      postToFrame({
-        type: "cs-agent:init",
-        payload: state.config,
-      });
-    }
-
-    postToFrame({ type: state.isOpen ? "cs-agent:open" : "cs-agent:minimize" });
-    postToFrame({
-      type: "cs-agent:maximized",
-      payload: { isMaximized: state.isMaximized },
-    });
-  }
-
-  function syncFrameVisibility() {
-    var frame = state.frame;
-    if (!frame) {
-      return;
-    }
-    clearFrameTimers();
-    applyFrameLayout();
-    frame.style.display = "block";
-
-    if (state.isOpen) {
-      frame.style.visibility = "visible";
-      frame.style.pointerEvents = "auto";
-      state.frameHideTimer = window.setTimeout(function () {
-        if (!state.frame) {
-          return;
-        }
-        state.frame.style.opacity = "1";
-        state.frame.style.transform = "translate3d(0, 0, 0) scale(1)";
-      }, 16);
-      flushFrameState();
-      return;
-    }
-
-    frame.style.pointerEvents = "none";
-    frame.style.opacity = "0";
-    frame.style.transform = state.isMaximized
-      ? "translate3d(0, 10px, 0) scale(0.985)"
-      : "translate3d(0, 16px, 0) scale(0.96)";
-    state.frameHideTimer = window.setTimeout(function () {
-      if (!state.frame || state.isOpen) {
-        return;
-      }
-      state.frame.style.visibility = "hidden";
-    }, state.animationDuration);
-    flushFrameState();
-  }
-
-  function destroyFrame() {
-    if (!state.frame) {
-      return;
-    }
-    clearFrameTimers();
-    state.frame.style.pointerEvents = "none";
-    state.frame.style.opacity = "0";
-    state.frame.style.transform = "translate3d(0, 18px, 0) scale(0.94)";
-    state.frame.style.visibility = "hidden";
-    state.frameDestroyTimer = window.setTimeout(function () {
-      if (!state.frame) {
-        return;
-      }
-      if (state.frame.parentNode) {
-        state.frame.parentNode.removeChild(state.frame);
-      }
-      state.frame = null;
-      state.frameLoaded = false;
-      state.frameReady = false;
-      state.initSent = false;
-      state.isOpen = false;
-      state.isMaximized = false;
-      clearFrameTimers();
-    }, state.animationDuration);
-  }
-
-  function createFrame() {
-    if (state.frame) {
-      return state.frame;
-    }
-
-    state.frame = document.createElement("iframe");
-    state.frame.dataset.csAgentWidget = "frame";
-    state.frame.title = state.config.title || "在线客服";
-    state.frame.src = state.frameUrl.toString();
-    applyFrameLayout();
-    state.frame.style.display = "block";
-    state.frame.style.visibility = "hidden";
-    state.frame.style.pointerEvents = "none";
-    state.frame.style.opacity = "0";
-    state.frame.style.transform = "translate3d(0, 18px, 0) scale(0.96)";
-    state.frame.addEventListener("load", function () {
-      state.frameLoaded = true;
-      syncFrameVisibility();
-    });
-
-    document.body.appendChild(state.frame);
-    return state.frame;
-  }
-
-  function handleWindowMessage(event) {
-    if (!state.frame || event.source !== state.frame.contentWindow) {
-      return;
-    }
-
-    var data = event.data || {};
-    if (data.type === "cs-agent:ready") {
-      state.frameReady = true;
-      flushFrameState();
-      return;
-    }
-
-    if (data.type === "cs-agent:request-minimize") {
-      state.isOpen = false;
-      syncFrameVisibility();
-      return;
-    }
-
-    if (data.type === "cs-agent:request-close") {
-      destroyFrame();
-      return;
-    }
-
-    if (data.type === "cs-agent:request-toggle-maximize") {
-      state.isMaximized = !state.isMaximized;
-      syncFrameVisibility();
-    }
-  }
-
-  function createLauncher() {
-    if (state.button) {
-      return state.button;
-    }
-
-    var config = state.config;
-    var button = document.createElement("button");
-    button.type = "button";
-    button.dataset.csAgentWidget = "launcher";
-    button.setAttribute("aria-label", config.title || "在线客服");
-    button.textContent = config.title || "在线客服";
-    button.style.position = "fixed";
-    button.style.bottom = "24px";
-    button.style.right = config.position === "left" ? "" : "24px";
-    button.style.left = config.position === "left" ? "24px" : "";
-    button.style.zIndex = "2147483000";
-    button.style.border = "0";
-    button.style.borderRadius = "999px";
-    button.style.padding = "14px 18px";
-    button.style.background = config.themeColor || "#0f6cbd";
-    button.style.color = "#fff";
-    button.style.font = "600 14px/1 sans-serif";
-    button.style.boxShadow = "0 18px 40px rgba(15, 35, 65, 0.24)";
-    button.style.cursor = "pointer";
-
-    button.addEventListener("click", function () {
-      if (!state.frame) {
-        createFrame();
-      }
-      state.isOpen = !state.isOpen;
-      syncFrameVisibility();
-    });
-
-    document.body.appendChild(button);
-    state.button = button;
-    return button;
-  }
-
-  function mount(config) {
-    state.config = normalizeConfig(config || window.CSAgentConfig || {});
-    if (!state.config.channelId || !state.config.baseUrl) {
-      console.error("[cs-agent-widget] channelId and baseUrl are required");
-      return;
-    }
-
-    state.frameUrl = createFrameUrl(state.config);
-    createLauncher();
-  }
-
-  function destroy() {
-    clearFrameTimers();
-    if (state.frame && state.frame.parentNode) {
-      state.frame.parentNode.removeChild(state.frame);
-    }
-    if (state.button && state.button.parentNode) {
-      state.button.parentNode.removeChild(state.button);
-    }
-    state.button = null;
-    state.frame = null;
-    state.frameLoaded = false;
-    state.frameReady = false;
-    state.initSent = false;
-    state.isOpen = false;
-    state.isMaximized = false;
-  }
-
-  window.CSAgentWidget = {
-    mount: mount,
-    destroy: destroy,
-    open: function () {
-      if (!state.frame) {
-        createFrame();
-      }
-      state.isOpen = true;
-      syncFrameVisibility();
-    },
-    close: function () {
-      state.isOpen = false;
-      syncFrameVisibility();
-    },
-  };
-
-  if (!state.listenerBound) {
-    window.addEventListener("message", handleWindowMessage);
-    state.listenerBound = true;
-  }
-
-  if (window.CSAgentConfig) {
-    mount(window.CSAgentConfig);
-  }
-})();
diff --git a/web/public/sdk/cs-ai-agent-sdk.min.js b/web/public/sdk/cs-ai-agent-sdk.min.js
index c2ffdc5..0886a1d 100644
--- a/web/public/sdk/cs-ai-agent-sdk.min.js
+++ b/web/public/sdk/cs-ai-agent-sdk.min.js
@@ -1 +1 @@
-!function(){var e={position:"right",themeColor:"#0f6cbd",width:"380px"},t=window.__CS_AGENT_WIDGET_STATE__;function n(t){var n,i={};for(n in e)Object.prototype.hasOwnProperty.call(e,n)&&(i[n]=e[n]);for(n in t=t||{})Object.prototype.hasOwnProperty.call(t,n)&&(i[n]=t[n]);return i.baseUrl=String(i.baseUrl||window.location.origin).replace(/\/$/,""),i.apiBaseUrl?i.apiBaseUrl=String(i.apiBaseUrl).replace(/\/$/,""):delete i.apiBaseUrl,i.channelId=String(i.channelId||""),i.externalId&&(i.externalId=String(i.externalId)),i.userToken&&(i.userToken=String(i.userToken)),i}function i(e){var t=document.currentScript;return t&&t.src?t.src.replace(/\/sdk\/cs-ai-agent-sdk\.min\.js(?:\?.*)?$/,""):String(e.widgetBaseUrl||e.baseUrl||window.location.origin).replace(/\/$/,"")}function r(){t.frameHideTimer&&(window.clearTimeout(t.frameHideTimer),t.frameHideTimer=null),t.frameDestroyTimer&&(window.clearTimeout(t.frameDestroyTimer),t.frameDestroyTimer=null)}function a(){var e=t.frame,n=t.config;if(e&&n){if(e.style.position="fixed",e.style.border="0",e.style.overflow="hidden",e.style.background="#fff",e.style.zIndex="2147483000",e.style.boxShadow="0 28px 80px rgba(15, 35, 65, 0.28)",e.style.willChange="top,right,bottom,left,width,height,opacity,transform,border-radius",e.style.transition="top 260ms cubic-bezier(0.22, 1, 0.36, 1), right 260ms cubic-bezier(0.22, 1, 0.36, 1), bottom 260ms cubic-bezier(0.22, 1, 0.36, 1), left 260ms cubic-bezier(0.22, 1, 0.36, 1), width 260ms cubic-bezier(0.22, 1, 0.36, 1), height 260ms cubic-bezier(0.22, 1, 0.36, 1), opacity 220ms ease, transform 260ms cubic-bezier(0.22, 1, 0.36, 1), border-radius 260ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 260ms ease",e.style.transformOrigin="left"===n.position?"left bottom":"right bottom",t.isMaximized)return e.style.top="20px",e.style.right="20px",e.style.bottom="20px",e.style.left="20px",e.style.width="calc(100vw - 40px)",e.style.maxWidth="none",e.style.height="calc(100vh - 40px)",void(e.style.borderRadius="24px");e.style.top="",e.style.bottom="112px",e.style.right="left"===n.position?"":"24px",e.style.left="left"===n.position?"24px":"",e.style.width=n.width||"380px",e.style.maxWidth="calc(100vw - 24px)",e.style.height="min(760px, calc(100vh - 136px))",e.style.borderRadius="28px"}}function o(e){if(t.frame&&t.frame.contentWindow&&t.frameUrl)try{t.frame.contentWindow.postMessage(e,t.frameUrl.origin)}catch(e){console.error("[cs-agent-widget] postMessage failed",e)}}function s(){t.frame&&t.frameLoaded&&t.frameReady&&(t.initSent||(t.initSent=!0,o({type:"cs-agent:init",payload:t.config})),o({type:t.isOpen?"cs-agent:open":"cs-agent:minimize"}),o({type:"cs-agent:maximized",payload:{isMaximized:t.isMaximized}}))}function l(){var e=t.frame;if(e){if(r(),a(),e.style.display="block",t.isOpen)return e.style.visibility="visible",e.style.pointerEvents="auto",t.frameHideTimer=window.setTimeout(function(){t.frame&&(t.frame.style.opacity="1",t.frame.style.transform="translate3d(0, 0, 0) scale(1)")},16),void s();e.style.pointerEvents="none",e.style.opacity="0",e.style.transform=t.isMaximized?"translate3d(0, 10px, 0) scale(0.985)":"translate3d(0, 16px, 0) scale(0.96)",t.frameHideTimer=window.setTimeout(function(){t.frame&&!t.isOpen&&(t.frame.style.visibility="hidden")},t.animationDuration),s()}}function d(){return t.frame?t.frame:t.frameUrl&&t.config?(t.frame=document.createElement("iframe"),t.frame.dataset.csAgentWidget="frame",t.frame.title=t.config.title||"\u5728\u7ebf\u5ba2\u670d",t.frame.src=t.frameUrl.toString(),a(),t.frame.style.display="block",t.frame.style.visibility="hidden",t.frame.style.pointerEvents="none",t.frame.style.opacity="0",t.frame.style.transform="translate3d(0, 18px, 0) scale(0.96)",t.frame.addEventListener("load",function(){t.frameLoaded=!0,l()}),document.body.appendChild(t.frame),t.frame):null}function c(e){var r=e||window.CSAgentConfig||{};t.config=n(r);var a=i(t.config);r.baseUrl||(t.config.baseUrl=a),t.config.channelId?(t.configLoading=!0,function(e){var t=String(e.apiBaseUrl||e.baseUrl||"").replace(/\/$/,"");if(!t||!e.channelId||"function"!=typeof fetch)return Promise.resolve(e);var n=t+"/api/channel/config?channelId="+encodeURIComponent(e.channelId);return fetch(n,{method:"GET",cache:"no-store",headers:{"X-Channel-Id":e.channelId}}).then(function(e){return e.json()}).then(function(t){return t&&!1!==t.success?function(e,t){if(!t)return e;var n,i={};for(n in e)Object.prototype.hasOwnProperty.call(e,n)&&(i[n]=e[n]);for(var r=["title","subtitle","themeColor","position","width"],a=0;a<r.length;a+=1)n=r[a],Object.prototype.hasOwnProperty.call(t,n)&&void 0!==t[n]&&null!==t[n]&&(i[n]=t[n]);return i}(e,t.data||{}):e}).catch(function(){return e})}(t.config).then(function(e){t.configLoading=!1,t.config=n(e),t.frameUrl=function(e){var t=i(e),n=new URL(t+"/kefu/chat/");return n.searchParams.set("channelId",e.channelId),n.searchParams.set("baseUrl",e.baseUrl),e.apiBaseUrl&&n.searchParams.set("apiBaseUrl",e.apiBaseUrl),e.externalId&&n.searchParams.set("externalId",e.externalId),e.externalName&&n.searchParams.set("externalName",e.externalName),e.userToken&&n.searchParams.set("userToken",e.userToken),n}(t.config),t.button&&t.button.parentNode&&(t.button.parentNode.removeChild(t.button),t.button=null),function(){if(t.button)return t.button;var e=t.config,n=document.createElement("button"),i=document.createElementNS("http://www.w3.org/2000/svg","svg"),r=document.createElement("span");n.type="button",n.dataset.csAgentWidget="launcher",n.setAttribute("aria-label",e.title||"\u5728\u7ebf\u5ba2\u670d"),i.setAttribute("viewBox","0 0 24 24"),i.setAttribute("fill","none"),i.setAttribute("stroke","currentColor"),i.setAttribute("stroke-width","2"),i.setAttribute("stroke-linecap","round"),i.setAttribute("stroke-linejoin","round"),i.setAttribute("aria-hidden","true"),i.style.width="24px",i.style.height="24px",i.style.flex="0 0 auto",["M3 11a9 9 0 1 1 18 0","M3 11h3a2 2 0 0 1 2 2v3a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z","M21 11h-3a2 2 0 0 0-2 2v3a2 2 0 0 0 2 2h1a2 2 0 0 0 2-2z","M21 16v2a4 4 0 0 1-4 4h-5"].forEach(function(e){var t=document.createElementNS("http://www.w3.org/2000/svg","path");t.setAttribute("d",e),i.appendChild(t)}),r.textContent="\u5ba2\u670d",r.style.display="block",n.style.position="fixed",n.style.bottom="24px",n.style.right="left"===e.position?"":"24px",n.style.left="left"===e.position?"24px":"",n.style.zIndex="2147483000",n.style.display="inline-flex",n.style.flexDirection="column",n.style.alignItems="center",n.style.justifyContent="center",n.style.gap="4px",n.style.width="64px",n.style.height="64px",n.style.border="0",n.style.borderRadius="999px",n.style.padding="0",n.style.background=e.themeColor||"#0f6cbd",n.style.color="#fff",n.style.font="600 13px/1 sans-serif",n.style.boxShadow="0 18px 40px rgba(15, 35, 65, 0.24)",n.style.cursor="pointer",n.appendChild(i),n.appendChild(r),n.addEventListener("click",function(){t.frame||d(),t.isOpen=!t.isOpen,l()}),document.body.appendChild(n),t.button=n}()})):console.error("[cs-agent-widget] channelId is required")}t||(t={button:null,frame:null,frameLoaded:!1,frameReady:!1,initSent:!1,isOpen:!1,isMaximized:!1,configLoading:!1,frameHideTimer:null,frameDestroyTimer:null,config:null,frameUrl:null,animationDuration:260},window.__CS_AGENT_WIDGET_STATE__=t),window.CSAgentWidget={mount:c,destroy:function(){r(),t.frame&&t.frame.parentNode&&t.frame.parentNode.removeChild(t.frame),t.button&&t.button.parentNode&&t.button.parentNode.removeChild(t.button),t.button=null,t.frame=null,t.frameLoaded=!1,t.frameReady=!1,t.initSent=!1,t.isOpen=!1,t.isMaximized=!1,t.configLoading=!1},open:function(){t.frame||d(),t.frame&&(t.isOpen=!0,l())},close:function(){t.isOpen=!1,l()}},t.listenerBound||(window.addEventListener("message",function(e){if(t.frame&&e.source===t.frame.contentWindow){var n=e.data||{};return"cs-agent:ready"===n.type?(t.frameReady=!0,void s()):"cs-agent:request-minimize"===n.type?(t.isOpen=!1,void l()):void("cs-agent:request-close"!==n.type?"cs-agent:request-toggle-maximize"===n.type&&(t.isMaximized=!t.isMaximized,l()):t.frame&&(r(),t.frame.style.pointerEvents="none",t.frame.style.opacity="0",t.frame.style.transform="translate3d(0, 18px, 0) scale(0.94)",t.frame.style.visibility="hidden",t.frameDestroyTimer=window.setTimeout(function(){t.frame&&(t.frame.parentNode&&t.frame.parentNode.removeChild(t.frame),t.frame=null,t.frameLoaded=!1,t.frameReady=!1,t.initSent=!1,t.isOpen=!1,t.isMaximized=!1,r())},t.animationDuration)))}}),t.listenerBound=!0),window.CSAgentConfig&&c(window.CSAgentConfig)}();
+!function(){var e={position:"right",themeColor:"#0f6cbd",width:"380px"},t=window.__CS_AGENT_WIDGET_STATE__;function n(t){var n,r={};for(n in e)Object.prototype.hasOwnProperty.call(e,n)&&(r[n]=e[n]);for(n in t=t||{})Object.prototype.hasOwnProperty.call(t,n)&&(r[n]=t[n]);return r.baseUrl=String(r.baseUrl||window.location.origin).replace(/\/$/,""),r.apiBaseUrl?r.apiBaseUrl=String(r.apiBaseUrl).replace(/\/$/,""):delete r.apiBaseUrl,r.channelId=String(r.channelId||""),r.externalId&&(r.externalId=String(r.externalId)),"function"!=typeof r.getUserToken&&delete r.getUserToken,r}function r(e){var t=document.currentScript;return t&&t.src?t.src.replace(/\/sdk\/cs-ai-agent-sdk\.min\.js(?:\?.*)?$/,""):String(e.widgetBaseUrl||e.baseUrl||window.location.origin).replace(/\/$/,"")}function i(e,t){var n,r={};for(n in e)Object.prototype.hasOwnProperty.call(e,n)&&"getUserToken"!==n&&(r[n]=e[n]);return t&&(r.userToken=t),r}function a(){return function(){var e=t.config||{};if("function"!=typeof 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