Match books.google.com and google.com/books/edition pages, extract the ISBN
from page text with a title/author fallback, and bump version to 1.2 so
userscript auto-update picks it up.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01X4uRGZZ4EpYHA4PNK3x5JY