refactor: migrate env prefix to VITE_* (#12466)

### What problem does this PR solve?

`UMI_APP_*` to `VITE_*`

### Type of change

- [x] Refactoring

web/src/pages/admin/utils.tsx

@@ -77,4 +77,4 @@ export function getSortIcon(sorting: false | SortDirection) {
 export const PERMISSION_TYPES = ['enable', 'read', 'write', 'share'] as const;
 export const EMPTY_DATA = Object.freeze<any[]>([]) as any[];
 export const IS_ENTERPRISE =
-  process.env.UMI_APP_RAGFLOW_ENTERPRISE === 'RAGFLOW_ENTERPRISE';
+  import.meta.env.VITE_RAGFLOW_ENTERPRISE === 'RAGFLOW_ENTERPRISE';

web/vite.config.ts

@@ -74,11 +74,6 @@ export default defineConfig(({ mode, command }) => {
         },
       },
     },
-    define: {
-      'process.env.UMI_APP_RAGFLOW_ENTERPRISE': JSON.stringify(
-        env.UMI_APP_RAGFLOW_ENTERPRISE,
-      ),
-    },
     assetsInclude: ['**/*.md'],
     base: env.VITE_BASE_URL,
     publicDir: 'public',