Feat: Replace the link of the old version of the agent module #3221 (#9130)

### What problem does this PR solve?
Feat: Automatically save agent canvas content
Feat: Replace the link of the old version of the agent module #3221
### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/app.tsx

@@ -21,6 +21,7 @@ import React, { ReactNode, useEffect, useState } from 'react';
 import { ThemeProvider, useTheme } from './components/theme-provider';
 import { SidebarProvider } from './components/ui/sidebar';
 import { TooltipProvider } from './components/ui/tooltip';
+import { ThemeEnum } from './constants/common';
 import storage from './utils/authorization-util';
 
 dayjs.extend(customParseFormat);
@@ -101,7 +102,10 @@ const RootProvider = ({ children }: React.PropsWithChildren) => {
   return (
     <TooltipProvider>
       <QueryClientProvider client={queryClient}>
-        <ThemeProvider defaultTheme="light" storageKey="ragflow-ui-theme">
+        <ThemeProvider
+          defaultTheme={ThemeEnum.Light}
+          storageKey="ragflow-ui-theme"
+        >
           <Root>{children}</Root>
         </ThemeProvider>
       </QueryClientProvider>