chore：隐藏智能体的任务栏

pages_tool/ai-chat/ai-chat-message.vue

@@ -233,10 +233,8 @@
         <view class="input-row-top">
           <!-- 无文字时左侧显示语音图标,点击才打开语音面板 -->
           <view v-if="!hasInputText" class="input-row-icon" @click="onVoiceClick">
-            <svg class="voice-icon-svg" viewBox="0 0 32 32" xmlns="http://www.w3.org/2000/svg" fill="none" stroke="#1f1f1f" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round">
-              <path d="M10 12 h6 l6 -4 v16 l-6 -4 h-6 a2 2 0 0 1 -2 -2 v-4 a2 2 0 0 1 2 -2 z"/>
-              <path d="M24 10 c2 3 2 9 0 12"/>
-            </svg>
+            <!-- 微信小程序不支持内联 SVG,改用 base64 SVG 背景图 -->
+            <view class="voice-icon-bg"></view>
           </view>
 
           <!-- 输入区: textarea 始终可点击输入,有文字时下方显示 Auto 选择器 -->
@@ -277,8 +275,8 @@
           </view>
         </view>
 
-        <!-- 底部工具栏: 5 个图标按钮均匀分布 -->
-        <view class="input-toolbar">
+        <!-- 底部工具栏: 5 个图标按钮均匀分布（当前隐藏，保留代码） -->
+        <view class="input-toolbar" style="display: none;">
           <view class="toolbar-item" hover-class="toolbar-item--hover" @click="onToolbarItem('task')">
             <view class="toolbar-icon icon-task"></view>
             <text class="toolbar-text">任务</text>
@@ -3245,10 +3243,13 @@ _handleStreamError(msg) {
         justify-content: center;
         margin-right: 12rpx;
 
-        .voice-icon-svg {
+        .voice-icon-bg {
           width: 36rpx;
           height: 36rpx;
-          display: block;
+          background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAzMiAzMiIgZmlsbD0ibm9uZSIgc3Ryb2tlPSIjMWYxZjFmIiBzdHJva2Utd2lkdGg9IjIuMiIgc3Ryb2tlLWxpbmVjYXA9InJvdW5kIiBzdHJva2UtbGluZWpvaW49InJvdW5kIj48cGF0aCBkPSJNMTAgMTIgaDYgbDYgLTQgdjE2IGwtNiAtNCBoLTYgYTIgMiAwIDAgMSAtMiAtMiB2LTQgYTIgMiAwIDAgMSAyIC0yIHoiLz48cGF0aCBkPSJNMjQgMTAgYzIgMyAyIDkgMCAxMiIvPjwvc3ZnPg==");
+          background-repeat: no-repeat;
+          background-position: center;
+          background-size: contain;
         }
       }