* Simplify local detector dispatch
Centralize HTML-versus-text file routing for stdin, directory, and direct-file scans. Add CLI characterization coverage for both stdin paths.
Prepared with AI assistance under maintainer pbakaus's standing scheduled-refactor authorization.
* Strengthen detector dispatch characterization
Put the HTML-only finding in a linked stylesheet so the text engine cannot satisfy the static-engine assertion.
Prepared with AI assistance under maintainer pbakaus's standing scheduled-refactor authorization.
