Lint

Fix MTU handling and Windows GUI buttons #16

	name: Lint

	on:
	push:
	pull_request:

	env:
	CARGO_TERM_COLOR: always

	jobs:
	# ── Rust: cargo fmt + clippy ──────────────────────────────────────────────────
	rust-lint:
	name: Rust Lint
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	submodules: recursive

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

	- uses: actions/cache@v4
	with:
	path: \|
	~/.cargo/registry/index/
	~/.cargo/registry/cache/
	~/.cargo/git/db/
	target/
	key: rust-lint-cargo-${{ hashFiles('**/Cargo.lock') }}
	restore-keys: rust-lint-cargo-

	- name: Install system dependencies
	run: \|
	sudo apt-get update -q
	sudo apt-get install -y cmake pkg-config libglib2.0-dev libwebkit2gtk-4.1-dev libssl-dev libxdo-dev libayatana-appindicator3-dev librsvg2-dev

	- name: cargo fmt
	run: cargo fmt --all -- --check

	- name: cargo clippy
	run: cargo clippy --workspace --exclude windows-vpn --exclude mavivpn --all-targets -- -D warnings

	# ── Kotlin: ktlint ────────────────────────────────────────────────────────────
	kotlin-lint:
	name: Kotlin Lint
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- uses: actions/setup-java@v4
	with:
	distribution: temurin
	java-version: 17

	- name: ktlint check
	working-directory: android
	run: \|
	chmod +x gradlew
	./gradlew ktlintCheck

Provide feedback