fix: highlight now via if-rendered marker (only selected row shows); no class accumulation

src/pages/index/index.ux

@@ -9,39 +9,47 @@
         <input class="new-session" type="button" value="＋ 新会话" onclick="newSession" />
         <text class="page-title small">工作区</text>
         <text class="ws-name">📁 DeepSeek_Harness_Watch</text>
-        <div class="sel-conv {{active0 ? 'sel-active' : ''}}" onclick="pickConv0">
+        <div class="sel-conv" onclick="pickConv0">
+          <text class="sel-flag" if="{{active0}}">●</text>
           <text class="sel-title fl{{fontLevel}}">小米手环10 Pro远程控制</text>
           <text class="sel-time">刚刚</text>
         </div>
-        <div class="sel-conv {{active1 ? 'sel-active' : ''}}" onclick="pickConv1">
+        <div class="sel-conv" onclick="pickConv1">
+          <text class="sel-flag" if="{{active1}}">●</text>
           <text class="sel-title fl{{fontLevel}}">DSHWatch 验收</text>
           <text class="sel-time">1小时</text>
         </div>
         <text class="ws-name">📁 reactor</text>
-        <div class="sel-conv {{active2 ? 'sel-active' : ''}}" onclick="pickConv2">
+        <div class="sel-conv" onclick="pickConv2">
+          <text class="sel-flag" if="{{active2}}">●</text>
           <text class="sel-title fl{{fontLevel}}">排查Git文件乱码问题</text>
           <text class="sel-time">15天</text>
         </div>
         <text class="ws-name">📁 project</text>
-        <div class="sel-conv {{active3 ? 'sel-active' : ''}}" onclick="pickConv3">
+        <div class="sel-conv" onclick="pickConv3">
+          <text class="sel-flag" if="{{active3}}">●</text>
           <text class="sel-title fl{{fontLevel}}">修改API配置为固定密钥</text>
           <text class="sel-time">8天</text>
         </div>
-        <div class="sel-conv {{active4 ? 'sel-active' : ''}}" onclick="pickConv4">
+        <div class="sel-conv" onclick="pickConv4">
+          <text class="sel-flag" if="{{active4}}">●</text>
           <text class="sel-title fl{{fontLevel}}">检测DeepSeek API可用性</text>
           <text class="sel-time">9天</text>
         </div>
         <text class="ws-name">📁 truestudio.online</text>
-        <div class="sel-conv {{active5 ? 'sel-active' : ''}}" onclick="pickConv5">
+        <div class="sel-conv" onclick="pickConv5">
+          <text class="sel-flag" if="{{active5}}">●</text>
           <text class="sel-title fl{{fontLevel}}">评估一下项目状态</text>
           <text class="sel-time">9天</text>
         </div>
         <text class="ws-name">📁 tama-project</text>
-        <div class="sel-conv {{active6 ? 'sel-active' : ''}}" onclick="pickConv6">
+        <div class="sel-conv" onclick="pickConv6">
+          <text class="sel-flag" if="{{active6}}">●</text>
           <text class="sel-title fl{{fontLevel}}">旧站交接与维护指南</text>
           <text class="sel-time">2天</text>
         </div>
-        <div class="sel-conv {{active7 ? 'sel-active' : ''}}" onclick="pickConv7">
+        <div class="sel-conv" onclick="pickConv7">
+          <text class="sel-flag" if="{{active7}}">●</text>
           <text class="sel-title fl{{fontLevel}}">O-COM 云端模式开发交接</text>
           <text class="sel-time">1小时</text>
         </div>
@@ -1348,6 +1356,12 @@ export default {
   margin-bottom: 6px;
 }
 
+.sel-flag {
+  color: #33b4ff;
+  font-size: 14px;
+  margin-right: 6px;
+}
+
 .sel-title {
   color: #e6f0ff;
   font-size: 16px;