feat(09-02): rewire cross-dir consumers, add package-root ./ui barrel, delete render/ui

- render/index.tsx: imports now '../ui' / '../ui/load'; remove the './ui' re-export (dead link + D-69)
- render/action.ts: import './ui' -> '../ui'
- client.ts: import './render/ui/load' -> './ui/load'
- index.ts: add export * from './ui' (ui surface kept via package root)
- delete render/ui/{title,load,index}; remove the now-empty render/ui directory

packages-user/client-modules/src/client.ts

@@ -41,7 +41,7 @@ import { WebLoadStarter } from '@motajs/loader';
 import { IRendererUsing, RendererUsing } from '@motajs/render-vue';
 import { IUIController, UIController } from '@motajs/system';
 import { createApp } from './render';
-import { LoadSceneUI } from './render/ui/load';
+import { LoadSceneUI } from './ui/load';
 import { createUIPropsBase } from './ui/func';
 
 export class ClientCore extends CoreState implements IClientCore {