- Introduce `NixModules` struct containing file paths, parsed ASTs, and option lists. - Add `parse_nix` and `build_nix_modules` helpers for centralized parsing. - Update CLI to use `build_nix_modules` instead of manual parsing. - Extend `App` with system/home paths and ASTs, enabling in‑place editing. - Implement boolean toggle on Enter: update AST, rewrite file, refresh modules, and report action. - Simplify event handling, adding shortcuts `1`/`2` to switch files. - Revise UI layout, introduce footer with usage hints and last‑action status. - Adjust imports and remove obsolete code across modules.
Update Cargo files to add clap and related dependencies, restructure App to handle configuration from CLI, and update nix module to support config source tracking. Add new cli module and adjust main to initialize modules at startup.
