chore: Update environment variable configuration by removing old backend example and screenshots, adding a new .env file, and modifying the root .env.example.

advanced_ai_agents/multi_agent_apps/ai_negotiation_battle_simulator/.env.example

@@ -1,5 +1,5 @@
 # Backend (Python)
-GOOGLE_API_KEY=your_google_ai_studio_key_here
+GOOGLE_API_KEY="your_google_api_key_here"
 
 # Frontend (Next.js) - optional, defaults to localhost:8000
 AGENT_URL=http://localhost:8000/

advanced_ai_agents/multi_agent_apps/ai_negotiation_battle_simulator/README.md

@@ -4,16 +4,6 @@
 
 Watch two AI agents battle it out in an epic used car negotiation! Built with **Google ADK** for the backend agents and **AG-UI + CopilotKit** for a jaw-dropping reactive frontend.
 
-![Negotiation Battle](https://img.shields.io/badge/ADK-Agent%20Development%20Kit-blue)
-![AG-UI](https://img.shields.io/badge/AG--UI-Protocol-green)
-![CopilotKit](https://img.shields.io/badge/CopilotKit-Frontend-purple)
-
-![App Screenshot](screenshots/01_home.png)
-
-### 🎬 See It In Action
-
-![Demo](screenshots/demo.gif)
-
 ## ✨ Features
 
 - **🤖 Dual AI Agents**: Buyer vs Seller with distinct personalities and negotiation strategies

advanced_ai_agents/multi_agent_apps/ai_negotiation_battle_simulator/backend/.env.example

@@ -1,2 +0,0 @@
-# Get your API key from https://aistudio.google.com/
-GOOGLE_API_KEY=your_google_ai_studio_key_here