feat: support DeepSeek (#667)

### What problem does this PR solve?

#666 
feat: support DeepSeek
feat: preview word and excel

### Type of change


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

web/src/routes.ts

@@ -88,6 +88,10 @@ const routes = [
         path: '/flow',
         component: '@/pages/flow',
       },
+      {
+        path: 'document/:id',
+        component: '@/pages/document-viewer',
+      },
     ],
   },
   {