Update README with video demo and clean up sections

Added a video demo section and removed duplicate AI Agent description.

Author: BYLinMou

README.md

@@ -14,20 +14,27 @@ AuraSpend is a gamified, AI-powered expense tracking application built with Reac
 
 ## ✨ Key Features
 
+### 🎞️ Video Demo
+<p align="center">
+  <a href="https://youtu.be/LM8KUN80FBA">
+    <img src="https://img.youtube.com/vi/LM8KUN80FBA/0.jpg" alt="Watch the video">
+  </a>
+</p>
+
 ### 💰 Smart Finance Management
-- **Multi-Currency Support**: Real-time currency conversion powered by Frankfurter API (Supports HKD, USD, CNY, JPY, etc.).
 - **AI Receipt Scanning**: Upload or take photos of receipts. The app uses multimodal LLMs (OpenAI/Gemini) to automatically extract merchant, items, amount, and categories.
+- **Multi-Currency Support**: Real-time currency conversion powered by Frankfurter API (Supports HKD, USD, CNY, JPY, etc.).
 - **Budget Tracking**: Set monthly or yearly budgets with visual progress bars and alerts.
 - **Detailed Reports**: Interactive charts showing spending trends, category breakdowns, and merchant summaries.
 
+### 🤖 AI Agent (Aura Assistant)
+- **Floating Chat**: An integrated AI assistant that can answer questions about your spending, summarize data, and perform actions via natural language (e.g., "How much did I spend on food last week?").
+
 ### 🐾 Gamification (Pet System)
 - **Digital Companion**: Your financial habits affect your pet's mood and hunger.
 - **Level Up**: Gain XP by logging transactions and staying within budget.
 - **Rewards**: Unlock outfits and new pets as you progress.
-
-### 🤖 AI Agent (Aura Assistant)
-- **Floating Chat**: An integrated AI assistant that can answer questions about your spending, summarize data, and perform actions via natural language (e.g., "How much did I spend on food last week?").
-
+  
 ### 🛠 Technical Highlights
 - **Real-time Sync**: Data synchronizes instantly across devices using Supabase Realtime.
 - **Offline Support**: Built-in caching for currencies and essential data.