Add comprehensive improvement ideas and implementation roadmap

[Copilot]

User asked for app improvement suggestions. Analyzed the codebase, PRD, and Tech Spec to produce a prioritized improvement roadmap.

Added to ideas.md

High Priority (MVP Enhancement)

• User preferences & matching system (extends existing ApplicationUser preference fields)
• Search & filtering for homes page (currently no filter capability)
• Active listing renewal system (data freshness)
• Group formation for users seeking roommates

Medium Priority

• Enhanced home details (amenities, floor, size fields)
• User profile improvements (photo upload, bio, interests)
• Direct messaging between users
• Reviews & reputation system
• In-app notifications

Lower Priority / Future

• Semantic search with vector embeddings
• Map improvements (clustering, distance search)
• PWA / mobile app
• Community features (events, forums)
• Sustainability scoring

Technical Improvements

• Security (rate limiting, field encryption)
• Performance (Redis caching, pagination)
• Code quality (tests, CI/CD)
• Database migration path (SQL Server → PostgreSQL per Tech Spec recommendation)

Implementation Timeline

Phased 16-week approach: foundation → matching → communication → advanced features

Notes acknowledge existing code structures (preference fields in ApplicationUser, date fields in Home, current SQL Server usage).

Original prompt

do you have any ideas to improve this app?

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