- Move ai-algorithm-specs.md to common specifications
- Move content-management-specs.md and ui-ux-guidelines.md to common
- Add new common specifications: pragmatic-analysis-specs.md, progressive-stage-system.md, speaking-evaluation-specs.md, user-flow-diagrams.md
- Update business rules with comprehensive payment system, user roles, and progressive learning mechanics
- Consolidate business logic rules into common business rules
- Archive deprecated ai-algorithm-specs.md to maintain version history
- Improve document organization for better cross-platform reference
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
鄭沛軒
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