fix: normalize Khanegi UI config on save for userTheme schema

Prevent re-saving invalid navigation.type/header.variant/products routes.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/pages/UiConfigPage.vue

@@ -7,6 +7,7 @@ import api from '@/api/http'
 import {
   cloneKhanegiAppSnapshot,
   createDefaultKhanegiUiConfig,
+  normalizeKhanegiUiConfigForClient,
 } from '@/config/defaultKhanegiUiConfig'
 import {
   applyKhanegiPreset,
@@ -201,10 +202,15 @@ function buildSavePayload() {
   if (selectedPreset.value === 'custom') {
     markCustomAndSyncSchemes(config)
   }
-  const payload = JSON.parse(JSON.stringify(config)) as typeof config
+  const payload = normalizeKhanegiUiConfigForClient(
+    JSON.parse(JSON.stringify(config)) as typeof config,
+  )
   // Never drop or rewrite an existing factory snapshot on normal save
   if (config.defaultSnapshot) {
-    payload.defaultSnapshot = JSON.parse(JSON.stringify(config.defaultSnapshot))
+    payload.defaultSnapshot = normalizeKhanegiUiConfigForClient({
+      app: JSON.parse(JSON.stringify(config.defaultSnapshot.app)),
+      pages: JSON.parse(JSON.stringify(config.defaultSnapshot.pages || {})),
+    }) as typeof payload.defaultSnapshot
   }
   return payload
 }