Cargo.lock                                 |   1 +
 crates/canvas/src/editor.rs                | 269 +++++++++++++++++++++++++++++++-
 crates/canvas/src/editor/page.rs           |  57 +++++--
 crates/canvas/src/gpu/page.rs              |   5 +-
 crates/notebook/examples/session_client.rs | 195 +++++++++++++++++++++++
 crates/notebook/src/session.rs             |  63 +++++++-
 crates/notebook/tests/session.rs           |  83 +++++++++-
 crates/snowbound/Cargo.toml                |   1 +
 crates/snowbound/src/accessibility.rs      |   6 +-
 crates/snowbound/src/main.rs               | 258 +++++++++++++++++++++++++++---
 tools/TESTING.md                           |   2 +-
 tools/session_acceptance.py                | 149 ++++++++++++++++++
 12 files changed, 1036 insertions(+), 53 deletions(-)