feat: 添加自动运行选择对话框，支持继续当前流程或重新开始，优化用户体验

sidepanel/sidepanel.html

@@ -174,6 +174,21 @@
     <div id="log-area"></div>
   </section>
 
+  <div id="auto-start-modal" class="modal-overlay" hidden>
+    <div class="modal-card">
+      <div class="modal-header">
+        <span class="modal-title">启动自动</span>
+        <button id="btn-auto-start-close" class="modal-close" type="button" aria-label="关闭">×</button>
+      </div>
+      <p id="auto-start-message" class="modal-message">检测到已有流程进度，选择继续当前还是重新开始。</p>
+      <div class="modal-actions">
+        <button id="btn-auto-start-cancel" class="btn btn-ghost btn-sm" type="button">取消</button>
+        <button id="btn-auto-start-restart" class="btn btn-outline btn-sm" type="button">重新开始</button>
+        <button id="btn-auto-start-continue" class="btn btn-primary btn-sm" type="button">继续当前</button>
+      </div>
+    </div>
+  </div>
+
   <div id="toast-container"></div>
   <script src="sidepanel.js"></script>
 </body>