Merge branch 'buffer-implementation'HEADmain

Establishes the first working baseline: moji <file> opens a file into a
ropey rope and edits it with Helix selection-first modal editing, under a
DO-178C DAL-C requirements and traceability process.

Prior to this, main tracked four files and src/main.rs was still
println!("Hello, world!") — there was no buildable state to build on.

Verified on a fresh clone of the branch with no untracked files:
cargo build; clippy --all-targets -D warnings clean; 294 tests passing;
scripts/check-trace.sh reports 98/98 requirements traced in both
directions.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..da70baa
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,18 @@
+//! 文字化け — a terminal text editor.
+//!
+//! The crate is split into a library and a thin binary so that the buffer core
+//! under [`buffer`] can be exercised by requirements-based tests without a
+//! terminal, and so structural coverage can be scoped to it.
+//!
+//! Developed to DO-178C DAL-C. Requirements live in `docs/requirements/`;
+//! items implementing a low-level requirement carry a `MJB-LLR-nnn` comment.
+
+pub mod action;
+pub mod app;
+pub mod buffer;
+pub mod cli;
+pub mod components;
+pub mod config;
+pub mod errors;
+pub mod logging;
+pub mod tui;