Summary

• add a new hyprlayoutctl Rust crate with CLI commands apply, watch, list, and validate plus global flags for config/layout dirs and dry-run/verbose modes
• implement layout parsing and resolution from inline config or .layout files, deterministic floating layout planning, Hyprland IPC dispatch, and debounced watch-mode reapplication
• add comprehensive unit tests for parsing, ambiguity handling, engine behavior, watch debounce, and app orchestration; include task session notes

Testing

• cargo test --manifest-path rs/Cargo.toml -p hyprlayoutctl
• just check