fix/update vite.config.ts (#3531)

- fix types
- update defintion to map `UserConfig` type

vite.config.ts

@@ -1,27 +1,27 @@
-import { defineConfig, loadEnv } from 'vite';
+import { defineConfig, loadEnv, Rollup, UserConfig } from 'vite';
 import tsconfigPaths from 'vite-tsconfig-paths';
 import { minifyJsonPlugin } from "./src/plugins/vite/vite-minify-json-plugin";
 
-export const defaultConfig = {
+export const defaultConfig: UserConfig  = {
 	plugins: [
-		tsconfigPaths() as any, 
+		tsconfigPaths(), 
 		minifyJsonPlugin(["images", "battle-anims"], true)
 	],
 	clearScreen: false,
+	appType: "mpa",
 	build: {
-		minify: 'esbuild' as const,
+		minify: 'esbuild',
 		sourcemap: false,
-	},
 		rollupOptions: {
-		onwarn(warning, warn) {
+			onwarn(warning: Rollup.RollupLog, defaultHandler: (warning: string | Rollup.RollupLog) => void) {
 				// Suppress "Module level directives cause errors when bundled" warnings
 				if (warning.code === "MODULE_LEVEL_DIRECTIVE") {
 					return;
 				}
-			warn(warning);
+				defaultHandler(warning);
+			},
 		},
 	},
-	appType: "mpa",
 };