diff --git a/dashboard/index.html b/dashboard/index.html
index 30513dea..771f72af 100644
--- a/dashboard/index.html
+++ b/dashboard/index.html
@@ -3,7 +3,7 @@
   <head>
     <meta charset="UTF-8" />
     <link rel="icon" href="/favicon.svg" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
     <meta name="keywords" content="AstrBot Soulter" />
     <meta name="description" content="AstrBot Dashboard" />
     <meta name="robots" content="noindex, nofollow" />
diff --git a/dashboard/src/components/chat/Chat.vue b/dashboard/src/components/chat/Chat.vue
index 054a1866..7c25e1bc 100644
--- a/dashboard/src/components/chat/Chat.vue
+++ b/dashboard/src/components/chat/Chat.vue
@@ -37,14 +37,7 @@
 
                     <!-- 正常聊天界面 -->
                     <template v-else>
-                        <div class="conversation-header fade-in" v-if="isMobile">
-                            <!-- 手机端菜单按钮 -->
-                            <v-btn icon class="mobile-menu-btn" @click="toggleMobileSidebar" variant="text">
-                                <v-icon>mdi-menu</v-icon>
-                            </v-btn>
-                        </div>
 
-                        <!-- 面包屑导航 -->
                         <div v-if="currentSessionProject && messages && messages.length > 0" class="breadcrumb-container">
                             <div class="breadcrumb-content">
                                 <span class="breadcrumb-emoji">{{ currentSessionProject.emoji || '📁' }}</span>
@@ -241,6 +234,7 @@ const route = useRoute();
 const { t } = useI18n();
 const { tm } = useModuleI18n('features/chat');
 const theme = useTheme();
+const customizer = useCustomizerStore();
 
 // UI 状态
 const isMobile = ref(false);
@@ -342,19 +336,28 @@ function checkMobile() {
     isMobile.value = window.innerWidth <= 768;
     if (!isMobile.value) {
         mobileMenuOpen.value = false;
+        customizer.SET_CHAT_SIDEBAR(false);
     }
 }
 
 function toggleMobileSidebar() {
     mobileMenuOpen.value = !mobileMenuOpen.value;
+    customizer.SET_CHAT_SIDEBAR(mobileMenuOpen.value);
 }
 
 function closeMobileSidebar() {
     mobileMenuOpen.value = false;
+    customizer.SET_CHAT_SIDEBAR(false);
 }
 
+// 同步 nav header 中的 sidebar toggle
+watch(() => customizer.chatSidebarOpen, (val) => {
+    if (isMobile.value) {
+        mobileMenuOpen.value = val;
+    }
+});
+
 function toggleTheme() {
-    const customizer = useCustomizerStore();
     const newTheme = customizer.uiTheme === 'PurpleTheme' ? 'PurpleThemeDark' : 'PurpleTheme';
     customizer.SET_UI_THEME(newTheme);
     theme.global.name.value = newTheme;
@@ -722,6 +725,7 @@ onBeforeUnmount(() => {
     height: 100%;
     max-height: 100%;
     overflow: hidden;
+    overscroll-behavior: none;
 }
 
 .chat-page-container {
diff --git a/dashboard/src/components/chat/ChatInput.vue b/dashboard/src/components/chat/ChatInput.vue
index 63cb03e3..87cc82c6 100644
--- a/dashboard/src/components/chat/ChatInput.vue
+++ b/dashboard/src/components/chat/ChatInput.vue
@@ -32,11 +32,12 @@
                 </div>
             </transition>
             <textarea ref="inputField" v-model="localPrompt" @keydown="handleKeyDown" :disabled="disabled"
-                placeholder="Ask AstrBot..."
-                style="width: 100%; resize: none; outline: none; border: 1px solid var(--v-theme-border); border-radius: 12px; padding: 12px 16px; min-height: 40px; font-family: inherit; font-size: 16px; background-color: var(--v-theme-surface);"></textarea>
+                placeholder="Ask AstrBot..." class="chat-textarea"
+                autocomplete="off" autocorrect="off" autocapitalize="sentences" spellcheck="false"
+                style="width: 100%; resize: none; outline: none; border: 1px solid var(--v-theme-border); border-radius: 12px; padding: 16px 20px; min-height: 40px; max-height: 200px; overflow-y: auto; font-family: inherit; font-size: 16px; background-color: var(--v-theme-surface);"></textarea>
             <div style="display: flex; justify-content: space-between; align-items: center; padding: 6px 14px;">
                 <div
-                    style="display: flex; justify-content: flex-start; margin-top: 4px; align-items: center; gap: 8px;">
+                    style="display: flex; justify-content: flex-start; margin-top: 4px; align-items: center; gap: 8px; min-width: 0; flex: 1; overflow: hidden;">
                     <!-- Settings Menu -->
                     <StyledMenu offset="8" location="top start" :close-on-content-click="false">
                         <template v-slot:activator="{ props: activatorProps }">
@@ -72,9 +73,9 @@
                     <!-- Provider/Model Selector Menu -->
                     <ProviderModelMenu v-if="showProviderSelector" ref="providerModelMenuRef" />
                 </div>
-                <div style="display: flex; justify-content: flex-end; margin-top: 8px; align-items: center;">
+                <div style="display: flex; justify-content: flex-end; margin-top: 8px; align-items: center; flex-shrink: 0;">
                     <input type="file" ref="imageInputRef" @change="handleFileSelect" style="display: none" multiple />
-                    <v-progress-circular v-if="disabled" indeterminate size="16" class="mr-1" width="1.5" />
+                    <v-progress-circular v-if="disabled && !mobile" indeterminate size="16" class="mr-1" width="1.5" />
                     <!-- <v-btn @click="$emit('openLiveMode')"
                         icon
                         variant="text"
@@ -87,36 +88,21 @@
                         </v-tooltip>
                     </v-btn> -->
                     <v-btn @click="handleRecordClick" icon variant="text" :color="isRecording ? 'error' : 'deep-purple'"
-                        class="record-btn" size="small">
+                        class="record-btn">
                         <v-icon :icon="isRecording ? 'mdi-stop-circle' : 'mdi-microphone'" variant="text"
                             plain></v-icon>
                         <v-tooltip activator="parent" location="top">
                             {{ isRecording ? tm('voice.speaking') : tm('voice.startRecording') }}
                         </v-tooltip>
                     </v-btn>
-                    <v-btn
-                        icon
-                        v-if="isRunning"
-                        @click="$emit('stop')"
-                        variant="text"
-                        class="send-btn"
-                        size="small"
-                    >
+                    <v-btn icon v-if="isRunning" @click="$emit('stop')" variant="tonal" color="deep-purple" class="send-btn">
                         <v-icon icon="mdi-stop" variant="text" plain></v-icon>
                         <v-tooltip activator="parent" location="top">
                             {{ tm('input.stopGenerating') }}
                         </v-tooltip>
                     </v-btn>
-                    <v-btn
-                        v-else
-                        @click="$emit('send')"
-                        icon="mdi-send"
-                        variant="text"
-                        color="deep-purple"
-                        :disabled="!canSend"
-                        class="send-btn"
-                        size="small"
-                    />
+                    <v-btn v-else @click="$emit('send')" icon="mdi-send" variant="tonal" color="deep-purple"
+                        :disabled="!canSend" class="send-btn" />
                 </div>
             </div>
         </div>
@@ -152,7 +138,8 @@
 </template>
 
 <script setup lang="ts">
-import { ref, computed, onMounted, onBeforeUnmount } from 'vue';
+import { ref, computed, watch, nextTick, onMounted, onBeforeUnmount } from 'vue';
+import { useDisplay } from 'vuetify';
 import { useModuleI18n } from '@/i18n/composables';
 import { useCustomizerStore } from '@/stores/customizer';
 import ConfigSelector from './ConfigSelector.vue';
@@ -251,21 +238,34 @@ function handleReplyAfterLeave() {
     isReplyClosing.value = false;
 }
 
-function handleKeyDown(e: KeyboardEvent) {
-    // Enter 发送消息或触发命令
-    if (e.keyCode === 13 && !e.shiftKey) {
-        e.preventDefault();
+const { mobile } = useDisplay();
 
-        // 检查是否是 /astr_live_dev 命令
+// Auto-resize textarea
+function autoResize() {
+    const el = inputField.value;
+    if (!el) return;
+    el.style.height = 'auto';
+    el.style.height = Math.min(el.scrollHeight, 200) + 'px';
+}
+
+watch(localPrompt, () => {
+    nextTick(autoResize);
+});
+
+function handleKeyDown(e: KeyboardEvent) {
+    // Enter 插入换行（桌面和手机端均如此，发送通过右下角发送按鈕）
+    // Shift+Enter 发送（Ctrl+Enter / Cmd+Enter 也保留）
+    if (e.keyCode === 13 && (e.shiftKey || e.ctrlKey || e.metaKey)) {
+        e.preventDefault();
         if (localPrompt.value.trim() === '/astr_live_dev') {
             emit('openLiveMode');
             localPrompt.value = '';
             return;
         }
-
         if (canSend.value) {
             emit('send');
         }
+        return;
     }
 
     // Ctrl+B 录音
@@ -588,11 +588,20 @@ defineExpose({
 @media (max-width: 768px) {
     .input-area {
         padding: 0 !important;
+        padding-bottom: 10px !important;
     }
 
     .input-container {
         width: 100% !important;
         max-width: 100% !important;
     }
+
+    .input-area textarea,
+    .chat-textarea {
+        min-height: 32px !important;
+        max-height: 160px !important;
+        font-size: 16px !important;
+        padding: 16px 16px 12px 16px !important;
+    }
 }
 </style>
diff --git a/dashboard/src/components/chat/ConversationSidebar.vue b/dashboard/src/components/chat/ConversationSidebar.vue
index 97f2179e..01a5fccf 100644
--- a/dashboard/src/components/chat/ConversationSidebar.vue
+++ b/dashboard/src/components/chat/ConversationSidebar.vue
@@ -37,7 +37,7 @@
             @deleteProject="$emit('deleteProject', $event)"
         />
 
-        <div style="overflow-y: auto; flex-grow: 1;"
+        <div style="overflow-y: auto; flex-grow: 1; overscroll-behavior-y: contain;"
             v-if="!sidebarCollapsed || isMobile">
             <v-card v-if="sessions.length > 0" flat style="background-color: transparent;">
                 <v-list density="compact" nav class="conversation-list"
@@ -326,6 +326,13 @@ function handleTransportModeChange(mode: string | null) {
     transition: all 0.2s ease;
 }
 
+@media (max-width: 768px) {
+    .conversation-actions {
+        opacity: 1 !important;
+        visibility: visible !important;
+    }
+}
+
 .edit-title-btn,
 .delete-conversation-btn {
     opacity: 0.7;
diff --git a/dashboard/src/components/chat/MessageList.vue b/dashboard/src/components/chat/MessageList.vue
index e30a34a4..42da95aa 100644
--- a/dashboard/src/components/chat/MessageList.vue
+++ b/dashboard/src/components/chat/MessageList.vue
@@ -965,6 +965,7 @@ export default {
     height: 100%;
     max-height: 100%;
     overflow-y: auto;
+    overscroll-behavior-y: contain;
     padding: 16px;
     display: flex;
     flex-direction: column;
diff --git a/dashboard/src/layouts/full/vertical-header/VerticalHeader.vue b/dashboard/src/layouts/full/vertical-header/VerticalHeader.vue
index 47905d4f..61377186 100644
--- a/dashboard/src/layouts/full/vertical-header/VerticalHeader.vue
+++ b/dashboard/src/layouts/full/vertical-header/VerticalHeader.vue
@@ -468,6 +468,12 @@ onMounted(async () => {
       <v-icon>mdi-menu</v-icon>
     </v-btn>
 
+    <!-- 移动端 chat sidebar 展开按钮 - 仅在 chat 模式下的小屏幕显示 -->
+    <v-btn v-if="customizer.viewMode === 'chat'" class="hidden-lg-and-up ms-1" icon rounded="sm" variant="flat"
+      @click.stop="customizer.TOGGLE_CHAT_SIDEBAR()">
+      <v-icon>mdi-menu</v-icon>
+    </v-btn>
+
     <div class="logo-container" :class="{ 'mobile-logo': $vuetify.display.xs, 'chat-mode-logo': customizer.viewMode === 'chat' }" @click="handleLogoClick">
       <span class="logo-text Outfit">Astr<span class="logo-text bot-text-wrapper">Bot
         <img v-if="isChristmas" src="@/assets/images/xmas-hat.png" alt="Christmas hat" class="xmas-hat" />
@@ -488,13 +494,13 @@ onMounted(async () => {
       </small>
     </div>
     
-    <!-- Bot/Chat 模式切换按钮 -->
+    <!-- Bot/Chat 模式切换按钮 - 手机端隐藏，移入 ... 菜单 -->
     <v-btn-toggle
       v-model="viewMode"
       mandatory
       variant="outlined"
       density="compact"
-      class="mr-4"
+      class="mr-4 hidden-xs"
       color="primary"
     >
       <v-btn value="bot" size="small">
@@ -524,6 +530,30 @@ onMounted(async () => {
         </v-btn>
       </template>
 
+      <!-- Bot/Chat 模式切换 - 仅在手机端显示 -->
+      <template v-if="$vuetify.display.xs">
+        <div class="mobile-mode-toggle-wrapper">
+          <v-btn-toggle
+            v-model="viewMode"
+            mandatory
+            variant="outlined"
+            density="compact"
+            color="primary"
+            class="mobile-mode-toggle"
+          >
+            <v-btn value="bot" size="small">
+              <v-icon start>mdi-robot</v-icon>
+              Bot
+            </v-btn>
+            <v-btn value="chat" size="small">
+              <v-icon start>mdi-chat</v-icon>
+              Chat
+            </v-btn>
+          </v-btn-toggle>
+        </div>
+        <v-divider class="my-1" />
+      </template>
+
       <!-- 语言切换 -->
       <v-list-item
         v-for="lang in languages"
@@ -888,6 +918,10 @@ onMounted(async () => {
   margin-left: 22px;
 }
 
+.mobile-logo.chat-mode-logo {
+  margin-left: 4px;
+}
+
 .logo-text {
   font-size: 24px;
   font-weight: 1000;
@@ -926,6 +960,20 @@ onMounted(async () => {
   margin-right: 8px;
 }
 
+.mobile-mode-toggle-wrapper {
+  display: flex;
+  justify-content: center;
+  padding: 8px 12px 4px;
+}
+
+.mobile-mode-toggle {
+  width: 100%;
+}
+
+.mobile-mode-toggle .v-btn {
+  flex: 1;
+}
+
 /* 移动端对话框标题样式 */
 .mobile-card-title {
   display: flex;
diff --git a/dashboard/src/scss/style.scss b/dashboard/src/scss/style.scss
index 8371f2b6..d473cbb6 100644
--- a/dashboard/src/scss/style.scss
+++ b/dashboard/src/scss/style.scss
@@ -15,3 +15,7 @@
 @import './components/VScrollbar';
 
 @import './pages/dashboards';
+
+html, body {
+  overscroll-behavior-y: none;
+}
diff --git a/dashboard/src/stores/customizer.ts b/dashboard/src/stores/customizer.ts
index f2bee12b..09d44fab 100644
--- a/dashboard/src/stores/customizer.ts
+++ b/dashboard/src/stores/customizer.ts
@@ -10,7 +10,8 @@ export const useCustomizerStore = defineStore({
     fontTheme: "Poppins",
     uiTheme: config.uiTheme,
     inputBg: config.inputBg,
-    viewMode: (localStorage.getItem('viewMode') as 'bot' | 'chat') || 'bot' // 'bot' 或 'chat'
+    viewMode: (localStorage.getItem('viewMode') as 'bot' | 'chat') || 'bot', // 'bot' 或 'chat'
+    chatSidebarOpen: false // chat mode mobile sidebar state
   }),
 
   getters: {},
@@ -30,7 +31,13 @@ export const useCustomizerStore = defineStore({
     },
     SET_VIEW_MODE(payload: 'bot' | 'chat') {
       this.viewMode = payload;
-      localStorage.setItem("viewMode", payload);
+      localStorage.setItem('viewMode', payload);
+    },
+    TOGGLE_CHAT_SIDEBAR() {
+      this.chatSidebarOpen = !this.chatSidebarOpen;
+    },
+    SET_CHAT_SIDEBAR(payload: boolean) {
+      this.chatSidebarOpen = payload;
     },
   }
 });