fix(core): have router.reload data replace query params

Fixes the bug where 
outer.reload would merge new data
with existing query params instead of replacing them.

With this change, the provided data object is now treated
as the single source of truth for the new query string, which
makes the behavior predictable.

Fixes: #2285

Author: HamidRezaLS

packages/core/src/url.ts

@@ -1,4 +1,3 @@
-import { mergeWith } from 'es-toolkit'
 import * as qs from 'qs'
 import { hasFiles } from './files'
 import { isFormData, objectToFormData } from './formData'
@@ -45,17 +44,10 @@ export function mergeDataIntoQueryString(
   const url = new URL(href.toString(), 'http://localhost')
 
   if (method === 'get' && Object.keys(data).length) {
-    url.search = qs.stringify(
-      mergeWith(qs.parse(url.search, { ignoreQueryPrefix: true }), data, (_, sourceValue, key, target) => {
-        if (sourceValue === undefined) {
-          delete target[key]
-        }
-      }),
-      {
-        encodeValuesOnly: true,
-        arrayFormat: qsArrayFormat,
-      },
-    )
+    url.search = qs.stringify(data, {
+      encodeValuesOnly: true,
+      arrayFormat: qsArrayFormat,
+    })
     data = {}
   }