Punc v0.2.0

Punc v0.2.0

Highlights

• Added unsaved-exit confirmation with Save, Discard, and Cancel actions.
• Added default selection and arrow-key navigation in the quit dialog.
• Improved external-change review flow and documented Alt+D more clearly.
• Fixed external-change state so the alert clears when disk content matches the buffer again.
• Reduced memory usage for large files and preview mode by avoiding full-string file IO and caching preview/status computations.

Verification

• cargo test
• cargo build --release
• cargo package --allow-dirty