fix: address code review comments

- Use DEFAULT_THEME constant for theme reset
- Type user selector properly
- Include LOCALE_CONFIG in preferences cleanup
- Add newline to migration file

src/app/(main)/settings/preferences/ThemeSetting.tsx

@@ -1,6 +1,7 @@
 import { Row, Button, Icon, useTheme } from '@umami/react-zen';
 import { useMessages, usePreferences } from '@/components/hooks';
 import { Sun, Moon } from '@/components/icons';
+import { DEFAULT_THEME } from '@/lib/constants';
 
 export function ThemeSetting() {
   const { theme, setTheme } = useTheme();
@@ -13,7 +14,7 @@ export function ThemeSetting() {
   };
 
   const handleReset = () => {
-    setTheme('light');
+    setTheme(DEFAULT_THEME);
     updatePreferences({ theme: null });
   };
 

src/components/hooks/usePreferences.ts

@@ -1,7 +1,8 @@
+import { User } from '@/generated/prisma/client';
 import { useApi } from './useApi';
 import { useApp } from '@/store/app';
 
-const userSelector = (state: { user: any }) => state.user;
+const userSelector = (state: { user: User }) => state.user;
 
 export function usePreferences() {
   const { post } = useApi();

src/lib/client.ts

@@ -67,5 +67,6 @@ export function setClientPreferences(preferences: {
 export function removeClientPreferences() {
   removeItem(DATE_RANGE_CONFIG);
   removeItem(TIMEZONE_CONFIG);
+  removeItem(LOCALE_CONFIG);
   removeItem(THEME_CONFIG);
 }