- architecture.org becomes a narrative: problem → three-subsystem solution
→ staged approach → what it means
- Moved TAM, revenue paths, analytical frames, strategy/IP links to _index.org
- _index.org is now the navigation hub with roadmap table and all catalog links
- Moved everything from ideas/passepartout/ to projects/passepartout/
- Moved legal structures to projects/flags/
- Created missing _index.org files for all subdirectories
- Stripped redundant passepartout- prefix from filenames
- Rewrote root _index.org as generalized brain index (projects + concepts)
- Updated Hugo nav to Projects/Concepts
- Updated build script section descriptions
- Deleted stale ideas/passepartout-economics.md orphan
