feat: a few settings

src/stores/app.ts

@@ -4,12 +4,16 @@ import { persist } from 'zustand/middleware';
 
 export interface App {
   devBuildAgreementTime: number;
+  developerMode: boolean;
+  darkMode: boolean;
 }
 
 export const useApp = create<App>()(
   persist(
     (set) => ({
       devBuildAgreementTime: 0,
+      developerMode: false,
+      darkMode: true,
     }),
     { name: 'app', merge: (a, b) => merge(b, a) },
   ),