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, 13 insertions, 2 deletions

diff --git a/src/main.rs b/src/main.rs
index e7a11a9..b87ff47 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,14 @@
-fn main() {
-    println!("Hello, world!");
+use clap::Parser;
+use mojibake::{app::App, cli::Cli, errors, logging};
+
+#[tokio::main]
+async fn main() -> color_eyre::Result<()> {
+    errors::init()?;
+    logging::init()?;
+
+    let args = Cli::parse();
+    // MJB-LLR-111: the optional positional path is handed to the buffer.
+    let mut app = App::new(args.tick_rate, args.frame_rate, args.file)?;
+    app.run().await?;
+    Ok(())
 }