feat: add user ID to User type and initialize user state in AuthProvider

Author: medyo

src/features/auth/types/index.ts

@@ -1,4 +1,5 @@
 export type User = {
+  id: string
   name: string
   imageURL?: string
   streak?: number

src/providers/AuthProvider.tsx

@@ -26,6 +26,7 @@ export const AuthProvider = ({ children }: { children: React.ReactNode }) => {
 
       initState({
         user: {
+          id: user.uid,
           name: user.displayName || 'Anonymous',
           imageURL: user.photoURL || '',
         },