feat(ui): add doc comments, fix quiet/stderr issues, and harden ui #2

	name: CI

	on:
	push:
	branches: [master]
	pull_request:
	branches: [master]

	permissions:
	contents: read

	env:
	CARGO_TERM_COLOR: always

	jobs:
	ci:
	name: Lint & Test
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- uses: dtolnay/rust-toolchain@stable
	with:
	components: rustfmt, clippy

	# Fmt needs no compilation — fails fast before cache/compile steps
	- name: Check formatting
	run: cargo fmt --check

	- uses: Swatinem/rust-cache@v2

	- name: Clippy
	run: cargo clippy --all-targets -- -D warnings

	- name: Test
	run: cargo test

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