v0.4.2

Fix codeblock render hook over-escaping " and ' to " and ' in markup.inner, breaking shiki and other highlighters that don’t decode quote entities. Codeblock inner content sits inside element tags (<alloy-code>…</alloy-code>), where only &, <, and > need escaping — quote characters pass through as literals. markup.language keeps full HTML attribute escaping since it lands in a lang="…" attribute.