SingleFile CLI 2.15.1

CLI fixes and improvements

When a page cannot be reached, the error now names the network failure the browser reported, such as a DNS or connection error, instead of the URL alone

single-file-core is updated to 1.6.6, which carries thirty changes since 1.6.5, listed in its own release notes: https://github.com/gildas-lormeau/single-file-core/releases/tag/v1.6.6. For the CLI they mean smaller saved pages, since font faces the browser can never select and rules that match nothing are no longer kept with what they reference; faces the page needs are no longer dropped, on ::marker, ::first-line, ::placeholder, ::file-selector-button and the root pseudo-elements, or when two rules differ only in a metric override; a popover or dialog opened by a button keeps its content; two captures of an unchanged page produce the same archive, so an archive can be hashed; identical fonts are stored once in an archive; and the page list of a --crawl-save-archive archive records when each page was captured

Co-authored by Claude (Claude Code)