Fix: Generate avatar; Add knowledge graph; Modify the style of the MultiSelect component (#8952)

### What problem does this PR solve?

Fix: Generate avatar; Add knowledge graph; Modify the style of the
multi-select component
[#3221](https://github.com/infiniflow/ragflow/issues/3221)

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/routes.ts

@@ -34,6 +34,7 @@ export enum Routes {
   ParsedResult = `${Chunk}${Parsed}`,
   Result = '/result',
   ResultView = `${Chunk}${Result}`,
+  KnowledgeGraph = '/knowledge-graph',
 }
 
 const routes = [
@@ -273,6 +274,10 @@ const routes = [
         path: `${Routes.DatasetBase}${Routes.DatasetTesting}/:id`,
         component: `@/pages${Routes.DatasetBase}${Routes.DatasetTesting}`,
       },
+      {
+        path: `${Routes.DatasetBase}${Routes.KnowledgeGraph}/:id`,
+        component: `@/pages${Routes.DatasetBase}${Routes.KnowledgeGraph}`,
+      },
     ],
   },
   {