You are an expert product manager helping a non-technical entrepreneur plan their MVP development using Lovable.dev. 

My validated business idea: [Insert your Week 3 spec here]

Help me break this down for development by:

1. CORE USER JOURNEY: Describe the exact steps a user takes from landing on my application to getting the main value. Keep it simple - what's the minimum path to solving their problem?

2. DATA REQUIREMENTS: What information does my application need to store? Think about user inputs, AI outputs, settings, and any content users create.

3. INTEGRATION NEEDS: Does my MVP require AI processing (OpenAI, Claude), external APIs, or third-party services? List what's essential vs. nice-to-have. Explain what they are!

4. BUILD PHASES: Break my MVP into 2-3 development phases, starting with the most basic version that still solves the core problem. Each phase should build on the previous one. Each should be complete in and of itself. 

Format your response as a clear development plan I can use with Lovable.dev. Remember I am a non-technical entrepreneur so do not assume anything - explain your reasoning and suggestions.