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.css

@@ -677,6 +677,79 @@ header {
 
 .log-line { animation: fadeIn 120ms ease-out; }
 
+/* ============================================================
+   Modal
+   ============================================================ */
+
+.modal-overlay {
+  position: fixed;
+  inset: 0;
+  z-index: 1200;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 16px;
+  background: rgba(15, 17, 23, 0.32);
+  backdrop-filter: blur(2px);
+}
+
+.modal-overlay[hidden] {
+  display: none !important;
+}
+
+.modal-card {
+  width: min(100%, 320px);
+  background: var(--bg-base);
+  border: 1px solid var(--border);
+  border-radius: 12px;
+  box-shadow: var(--shadow-md), 0 18px 36px rgba(0, 0, 0, 0.18);
+  padding: 14px;
+}
+
+.modal-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 10px;
+  margin-bottom: 10px;
+}
+
+.modal-title {
+  font-size: 14px;
+  font-weight: 700;
+  color: var(--text-primary);
+}
+
+.modal-close {
+  width: 26px;
+  height: 26px;
+  border: none;
+  border-radius: 999px;
+  background: transparent;
+  color: var(--text-muted);
+  cursor: pointer;
+  font-size: 18px;
+  line-height: 1;
+  transition: all var(--transition);
+}
+.modal-close:hover {
+  background: var(--bg-hover);
+  color: var(--text-primary);
+}
+
+.modal-message {
+  font-size: 13px;
+  line-height: 1.55;
+  color: var(--text-secondary);
+  margin-bottom: 14px;
+}
+
+.modal-actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: 8px;
+}
+
 /* ============================================================
    Toast Notifications
    ============================================================ */