- ObjectDef gains passable/opaque fields (defaults: false/true); Board::is_passable
consults the object before the grid cell, so objects block movement independently
of the floor tile beneath them
- Editor Objects tab exposes Passable and Opaque checkboxes; changes survive save/load
- Add ObjectDef::new(x, y) to centralise placement defaults; remove triple
default_glyph() call and unused Glyph import from main.rs
- Fix stale Behavior doc comment; update CLAUDE.md and ARCHITECTURE.md
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
randrews