Update env example and add project note to README

Replaced placeholder Supabase credentials in .env.example for improved security. Added a note to README clarifying repository status, licensing, and open-source version details.

Author: BYLinMou

.env.example

@@ -1,5 +1,5 @@
 # Copy this file to .env and fill in your project's Supabase values.
 # Do NOT commit your real keys to git.
 
-EXPO_PUBLIC_SUPABASE_URL=https://jwslarjpfcrfnvxtqums.supabase.co
-EXPO_PUBLIC_SUPABASE_ANON_KEY=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6Imp3c2xhcmpwZmNyZm52eHRxdW1zIiwicm9sZSI6ImFub24iLCJpYXQiOjE3NTkwMzQ4NTUsImV4cCI6MjA3NDYxMDg1NX0.q5Uj50wKJOx1Wk0guzEQ5MUeoodetPodg4XbiJl-vL0
+EXPO_PUBLIC_SUPABASE_URL=https://your-project-id.supabase.co
+EXPO_PUBLIC_SUPABASE_ANON_KEY=your-supabase-anon-key-here

README.md

@@ -1,5 +1,7 @@
 # AuraSpend - Smart Budgeting Companion
 
+> **Note**: This repository is the official repo for the group project. This codebase is open-sourced up to version v0.0.11 with GPL-3.0 license. Subsequent development has been taken over by a team outside of the original group project, but APK updates will continue to be maintained on the release page. Code after v0.0.11 is not open source.
+
 **HKU COMP3330 (25-26 Sem 1) - Group 20**
 
 AuraSpend is a gamified, AI-powered expense tracking application built with React Native (Expo) and Supabase. It combines financial management with a digital pet companion to encourage healthy spending habits.