v0.12.0

Added

• Binary files (images, databases, compiled assets, etc.) are now visible in all commands — they appear as single whole-file hunks with a (binary) marker and can be staged, unstaged, restored, committed, and stashed by hash like any other hunk
• Line-spec syntax (e.g., hash:3-5) is rejected for binary hunks with a clear error message, since binary files have no line-level granularity

Changed

• Internal refactoring: extracted shared helpers, moved stash orchestration to stash.zig, deduplicated git subprocess boilerplate (-473 lines net)