Refactor AI proxy error handling and remove deprecated upload and event routes

- Updated `getAiProxy` function to return a JSON response for missing objects when the user is the owner.
- Removed the `upload.ts`, `event.ts`, and related middleware files to streamline the codebase.
- Cleaned up `handle-request.ts` and `index.ts` by removing unused imports and routes.
- Deleted chunk upload handling and related utility functions to simplify resource management.
- Enhanced app manager list functionality to support app creation if not found.

src/routes-simple/router.ts

@@ -1,14 +1,13 @@
 import { router } from '@/app.ts';
 import http from 'http';
 import { useContextKey } from '@kevisual/context';
-import { checkAuth, error } from './middleware/auth.ts';
-export { router, checkAuth, error };
+export { router, };
 
 /**
  * 事件客户端
  */
 const eventClientsInit = () => {
-  const clients = new Map<string, { client?: http.ServerResponse; createTime?: number; [key: string]: any }>();
+  const clients = new Map<string, { client?: http.ServerResponse; createTime?: number;[key: string]: any }>();
   return clients;
 };
 export const clients = useContextKey('event-clients', () => eventClientsInit());