docs: simplified plan for GitHub Copilot users only

Major scope reduction:
- Target: Developers with existing Copilot subscription
- No API key management needed (Copilot native in VS Code)
- No cost tracking or rate limiting required
- Focus on templates + prompt library + build automation
- Timeline: 3 months instead of 6+
- Budget: €660 instead of €7200
- Pricing: €29/year sustainable model

Benefits:
- Eliminates API complexity entirely
- User already paying GitHub for AI
- Simpler legal compliance (no API reselling)
- Faster development cycle
- Clear value proposition

Next: Awaiting approval to start Phase 1 implementation

Author: CalorieApp Maintainer

docs/universal_app_builder/ROADMAP.md

@@ -12,9 +12,11 @@
 Transform the CalorieApp UX Tour system into a **Universal App Builder** that enables developers to:
 - Create Python/Kivy/KivyMD apps from templates
 - Manage multi-project workspaces
-- Integrate AI assistance (with user-provided API keys)
+- **Leverage GitHub Copilot** (users must have existing subscription)
 - Build APK/EXE distributions
-- Maintain safety through immutable backups
+- Provide curated Copilot prompts for common tasks
+
+**🆕 SCOPE UPDATE:** Targeting GitHub Copilot subscribers only (simplifies architecture, reduces costs)
 
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