Refine MySQL status messaging and SQL page copy

web/device_query.html

@@ -570,14 +570,13 @@
         <div class="helper-box">
           <ul>
             <li>输入客户端原始上报值，服务端会先归一化为 <code>alias_norm</code>，再查询 MySQL。</li>
-            <li>当前读链路使用只读账号，便于模拟第三方直接查库的效果。</li>
+            <li>当前读链路使用只读账号，便于核对 SQL 查询结果与连接配置。</li>
             <li>推荐新接入优先对接 `mm_device_catalog`，兼容链路再使用视图。</li>
           </ul>
         </div>
 
         <div class="helper-box">
-          <p class="helper-title">只读连接信息</p>
-          <p>可直接用于第三方连库联调。</p>
+          <p class="helper-title">只读连接参数</p>
           <div id="sqlReadonlyInfo" class="credential-grid">
             <div class="credential-item">
               <span class="credential-label">Host</span>
@@ -1634,8 +1633,8 @@ LIMIT 20;</pre>
       } catch (err) {
         sqlReadonlyInfoEl.innerHTML = `
           <div class="credential-item">
-            <span class="credential-label">只读连接信息</span>
-            <p class="credential-value">${escapeHtml(err.message || String(err))}</p>
+            <span class="credential-label">只读连接参数</span>
+            <p class="credential-value">暂时无法读取连接参数</p>
           </div>
         `;
       }