feat: v0.22.2 — harden terminal and wasm release gates

[subinium]

Release v0.22.2

Patch release focused on terminal safety, browser backend lifecycle, state cleanup, API consistency, release gates, and documentation parity.

Highlights

• Harden terminal color output, graphics protocol gating, teardown, suspend/resume, and escape sanitization.
• Replace public color math with f64 APIs while keeping deprecated f32 aliases for compatibility.
• Add explicit WASM runtime lifecycle ownership with WasmAppHandle and DOM mount/flush/dispose browser smoke coverage.
• Abort dropped/superseded async tasks and validators; add cleanup APIs for keyed/screen/mode state.
• Align superlighttui and slt-wasm versioning and harden CI/release publishing order.
• Update README, examples, and docs for the current explicit example set and v0.22.2 install snippet.

Local gate

• cargo fmt -- --check
• cargo check --all-features
• cargo clippy --all-features -- -D warnings
• cargo test --all-features
• cargo check --examples --all-features
• typos
• cargo check -p superlighttui --no-default-features
• cargo check -p slt-wasm --target wasm32-unknown-unknown
• cargo hack check -p superlighttui --each-feature --no-dev-deps
• cargo audit
• cargo deny check
• cargo +1.88 check -p superlighttui --features async,serde
• cargo +1.88 clippy -p superlighttui --all-features -- -D warnings
• cargo check -p slt-wasm --all-features --target wasm32-unknown-unknown
• cargo clippy -p slt-wasm --all-features --target wasm32-unknown-unknown -- -D warnings
• cargo test -p slt-wasm --all-features
• cargo semver-checks
• cargo package --allow-dirty -p superlighttui

Local browser wasm-pack smoke was attempted but this macOS host has no PATH chromedriver and wasm-pack downloads a ChromeDriver that mismatches the locally installed Chrome. CI now installs Chrome and chromedriver explicitly and passes CHROMEDRIVER to wasm-pack.

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