Add CHANGELOG documenting all changes since 0.1.0 and the initial
release. Add DECISIONS.md as an architectural decision log. Update
CLAUDE.md to reflect current architecture. Bump to 0.1.1 for the
security and correctness fixes in the previous commit.
Feature-parity with Python v0.2.0. Same CSS, same UI, same actions.
Single 3.1 MB binary with embedded resources (CSS, wallpaper, avatar).
Modules: power.rs, i18n.rs, config.rs, users.rs, panel.rs, main.rs
45 unit tests passing. Python sources retained as reference.
