新增提示Toast组件

app/components/layout/Breadcrumb.tsx

@@ -10,26 +10,59 @@ interface BreadcrumbProps {
   className?: string;
 }
 
+interface PreviousRouteData {
+  title: string;
+  to: string;
+}
+
 interface Handle {
-  breadcrumb: string | ((data: any) => string);
+  breadcrumb: string | ((data: unknown) => string);
+  previousRoute?: PreviousRouteData | ((data: unknown) => PreviousRouteData | undefined);
 }
 
 interface Match {
   handle?: Handle;
   pathname: string;
-  data: any;
+  data: unknown;
 }
 
 export function Breadcrumb({ items = [], className = '' }: BreadcrumbProps) {
   const matches = useMatches() as Match[];
+  
+  // 构建面包屑数据
   const breadcrumbs = items.length > 0 ? items : matches
     .filter(match => match.handle?.breadcrumb)
-    .map(match => ({
-      title: typeof match.handle?.breadcrumb === 'function' 
-        ? match.handle.breadcrumb(match.data)
-        : match.handle?.breadcrumb,
-      to: match.pathname
-    }));
+    .map((match, index, array) => {
+      // 当前路由的面包屑
+      const current = {
+        title: typeof match.handle?.breadcrumb === 'function' 
+          ? match.handle.breadcrumb(match.data)
+          : match.handle?.breadcrumb as string,
+        to: match.pathname
+      };
+      
+      // 如果当前路由有previousRoute属性且该路由是数组中的最后一个
+      if (match.handle?.previousRoute && index === array.length - 1) {
+        // 获取previousRoute数据，支持函数形式
+        const prevRouteData = typeof match.handle.previousRoute === 'function'
+          ? match.handle.previousRoute(match.data)
+          : match.handle.previousRoute;
+        
+        // 如果previousRoute存在，添加到面包屑中
+        if (prevRouteData) {
+          return [
+            {
+              title: prevRouteData.title,
+              to: prevRouteData.to
+            },
+            current
+          ];
+        }
+      }
+      
+      return [current];
+    })
+    .flat(); // 扁平化数组
 
   if (breadcrumbs.length === 0) {
     return null;