diff --git a/README.md b/README.md
index 0cd435c..c85a233 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,7 @@ docker run -d --name babel-duck --env-file .env -p 9000:9000 orenoid/babel-duck:
 
 - [ ] 对话模板
 - [ ] 复述练习模式
+- [ ] 移动端适配
 - [ ] 语音回放
 - [ ] 支持多模态语音
 - [ ] 接入更多 LLM/TTS/STT 服务
diff --git a/src/app/chat/components/chat.tsx b/src/app/chat/components/chat.tsx
index 6a91de0..e5abf71 100644
--- a/src/app/chat/components/chat.tsx
+++ b/src/app/chat/components/chat.tsx
@@ -72,7 +72,7 @@ export function Chat({ chatID, chatTitle, loadChatByID, className = "" }: {
             throw new Error(`Chat intelligence with type ${type} not found`)
         }
     }
-    const inputHandlers = chatSettings !== undefined ?
+    const visibleInputHandlers = chatSettings !== undefined ?
         chatSettings.inputHandlers
             .filter((handler) => handler.display)
             .map((handler) => handler.handler)
@@ -251,11 +251,40 @@ export function Chat({ chatID, chatTitle, loadChatByID, className = "" }: {
             </div>
             {/* input */}
             <MessageInput addInputHandler={(handler) => {
-                updateInputHandlerInLocalStorage(chatID, inputHandlers?.length ?? 0, handler)
-            }} className="w-4/5"
+                if (chatSettings === undefined) return
+                updateInputHandlerInLocalStorage(chatID, visibleInputHandlers?.length ?? 0, handler)
+                const originalInputHandlers = chatSettings.inputHandlers
+                dispatch(setCurrentChatSettings({
+                    chatID,
+                    chatSettings: {
+                        ...chatSettings,
+                        inputHandlers: [
+                            ...originalInputHandlers.map((handler) => ({ handler: handler.handler.serialize(), display: handler.display })),
+                            { handler: handler.serialize(), display: true }
+                        ],
+                    }
+                }))
+            }}
+            updateInputHandler={(index, handler) => {
+                if (chatSettings === undefined) return
+                updateInputHandlerInLocalStorage(chatID, index, handler)
+                const originalInputHandlers = chatSettings.inputHandlers
+                dispatch(setCurrentChatSettings({
+                    chatID,
+                    chatSettings: {
+                        ...chatSettings,
+                        inputHandlers: originalInputHandlers.map((h, i) => 
+                            i === index 
+                                ? { handler: handler.serialize(), display: h.display }
+                                : { handler: h.handler.serialize(), display: h.display }
+                        ),
+                    }
+                }))
+            }}
+                className="w-4/5"
                 chatID={chatID}
                 msgListSwitchSignal={msgListSwitchSignal}
-                inputHandlers={inputHandlers}
+                inputHandlers={visibleInputHandlers}
                 addMesssage={addMesssage} messageList={currentMessageList}
                 // Temporarily forbid nested multi-level discussions, the component has already supported, 
                 // it's just the AI might be unable to handle too many levels
diff --git a/src/app/chat/components/input.tsx b/src/app/chat/components/input.tsx
index 6cf66a1..1de3bc2 100644
--- a/src/app/chat/components/input.tsx
+++ b/src/app/chat/components/input.tsx
@@ -1,31 +1,31 @@
 "use client";
 
-import { useState, useRef, useEffect, useCallback, useContext } from "react";
-import { FaBackspace, FaMicrophone } from "react-icons/fa";
-import { LuSettings, LuUserCog2 } from "react-icons/lu";
-import { Audio, Oval } from "react-loader-spinner";
-import { messageAddedCallbackOptions } from "./chat";
-import { ChatSettingsContext } from "./chat-settings";
-import { SpecialRoles, TextMessage } from "./message";
+import { I18nText } from "@/app/i18n/i18n";
+import { TmpFilledButton, TmpTransparentButton } from "@/app/ui-utils/components/button";
+import { SemiTransparentOverlay } from "@/app/ui-utils/components/overlay";
 import { IconCircleWrapper } from "@/app/ui-utils/components/wrapper";
 import { diffChars } from "diff";
+import { IMediaRecorder } from "extendable-media-recorder";
+import { useCallback, useContext, useEffect, useRef, useState } from "react";
+import { useTranslation } from "react-i18next";
+import { FaBackspace, FaMicrophone } from "react-icons/fa";
+import { FiPlus } from "react-icons/fi";
 import { LiaComments } from "react-icons/lia";
+import { LuSettings, LuUserCog2 } from "react-icons/lu";
 import { PiKeyReturnBold } from "react-icons/pi";
-import { isOpenAILikeMessage, Message, OpenAILikeMessage } from "../lib/message";
+import { TbPencil } from "react-icons/tb";
+import { Audio, Oval } from "react-loader-spinner";
 import Switch from "react-switch";
-import { IMediaRecorder } from "extendable-media-recorder";
 import { Tooltip } from "react-tooltip";
-import { FiPlus } from "react-icons/fi";
-import { updateInputHandlerInLocalStorage, updateInputSettingsPayloadInLocalStorage } from "../lib/chat";
+import { updateInputSettingsPayloadInLocalStorage } from "../lib/chat";
+import { isOpenAILikeMessage, Message, OpenAILikeMessage } from "../lib/message";
+import { messageAddedCallbackOptions } from "./chat";
+import { ChatSettingsContext } from "./chat-settings";
 import {
-    InputHandler,
-    CustomInputHandlerCreator
+    CustomInputHandlerCreator,
+    InputHandler
 } from "./input-handlers";
-import { SemiTransparentOverlay } from "@/app/ui-utils/components/overlay";
-import { useTranslation } from "react-i18next";
-import { I18nText } from "@/app/i18n/i18n";
-import { TmpFilledButton, TmpTransparentButton } from "@/app/ui-utils/components/button";
-import { TbPencil } from "react-icons/tb";
+import { SpecialRoles, TextMessage } from "./message";
 import { TutorialDiffView, TutorialInput } from "./tutorial-input";
 
 export async function reviseMessage(
@@ -220,7 +220,11 @@ export type MsgListSwitchSignal =
     | { type: 'backFromFollowUpDiscussion', message: Message, handledMsg: Message, handlerInstruction: string, key: number }
 
 export function MessageInput({
-    chatID, messageList, inputHandlers, addMesssage, addInputHandler: pAddInputHandler, msgListSwitchSignal, allowFollowUpDiscussion, startFollowUpDiscussion, className = ""
+    chatID, messageList, inputHandlers, msgListSwitchSignal, allowFollowUpDiscussion, className = "",
+    addMesssage,
+    addInputHandler: pAddInputHandler,
+    startFollowUpDiscussion,
+    updateInputHandler,
 }: {
     chatID: string
     messageList: Message[];
@@ -228,9 +232,9 @@ export function MessageInput({
     allowFollowUpDiscussion: boolean;
     // callback functions
     addMesssage: (message: Message, callbackOpts?: messageAddedCallbackOptions) => void;
-    // TODO tech-debt: 新增 inputHandler 应该通过更新 chatSettings 来实现
     addInputHandler: (handler: InputHandler) => void;
     startFollowUpDiscussion: (userInstruction: string, messageToRevise: Message, revisedText: Message) => void;
+    updateInputHandler: (index: number, handler: InputHandler) => void;
     // signals
     msgListSwitchSignal: MsgListSwitchSignal,
     className?: string;
@@ -321,17 +325,17 @@ export function MessageInput({
         }
         pAddInputHandler(handler);
         setCompState(compState.previousState);
-        inputHandlers.push(handler); // TODO need to find out why this would work...
     }
-    function updateInputHandler(handler: InputHandler) {
+    function _updateInputHandler(handler: InputHandler) {
         if (compState.type !== 'settingsPanel') {
             return;
         }
-        updateInputHandlerInLocalStorage(chatID, compState.handlerIndex, handler);
-        inputHandlers[compState.handlerIndex] = handler;
+        updateInputHandler(compState.handlerIndex, handler);
         setCompState(compState.previousState);
     }
-    function updateInputSettingsPayload(payload: object) {
+    // update the input component settings
+    // TODO tech-debt: maybe should just achieve this by directly updating the chat settings
+    function updateInputCompSettings(payload: object) {
         updateInputSettingsPayloadInLocalStorage(chatID, payload);
     }
 
@@ -401,7 +405,7 @@ export function MessageInput({
                         {compState.type === 'settingsPanel' && compState.handlerIndex === index && configurable &&
                             <>
                                 <SemiTransparentOverlay onClick={cancelUpdatingInputHandler} />
-                                <SettingsPanel updateHandler={updateInputHandler} />
+                                <SettingsPanel updateHandler={_updateInputHandler} />
                             </>
                         }
                     </div>
@@ -444,7 +448,7 @@ export function MessageInput({
             addMessage={addMesssage} updateMessage={updateMessage}
             revisionMessage={isNormal ? [compState.message, compState.fromRevision] : undefined} rejectionSignal={rejectionSignal} />}
         {inputComponentType === 'tutorialInput' && <TutorialInput msgListSwitchSignal={msgListSwitchSignal} allowEdit={isNormal}
-            addMessage={addMesssage} updateMessage={updateMessage} updateInputSettingsPayload={updateInputSettingsPayload}
+            addMessage={addMesssage} updateMessage={updateMessage} updateInputSettingsPayload={updateInputCompSettings}
             revisionMessage={isNormal ? [compState.message, compState.fromRevision] : undefined} rejectionSignal={rejectionSignal} />}
     </div>;
 }
diff --git a/src/app/settings/components/settings.tsx b/src/app/settings/components/settings.tsx
index 6d08df7..4588664 100644
--- a/src/app/settings/components/settings.tsx
+++ b/src/app/settings/components/settings.tsx
@@ -443,9 +443,7 @@ function CommonChatSettings({ chatSettings, updateChatSettings, className = "" }
                                     if (handler.handler.deletable) {
                                         updateChatSettings({
                                             ...chatSettings,
-                                            inputHandlers: chatSettings.inputHandlers.filter((h) =>
-                                                h.handler.implType !== handler.handler.implType
-                                            )
+                                            inputHandlers: chatSettings.inputHandlers.filter((_, i) => i !== index)
                                         })
                                     }
                                 }}