The hidden BrowserWindow used by fetchLinkTitle to scrape page titles
had no will-download handler on its session. When a link artifact URL
responds with Content-Disposition: attachment, Electron fires will-download
and the file is saved for real — explaining the spurious download on the
Artifacts page.
Add guardLinkTitleSession() (parallel to the existing audio-mute guard for
#49505) that installs a will-download handler which immediately cancels
every download item on the hermes:link-titles session. Call it from
getLinkTitleSession() right after the request-type blocklist is wired up.
Brooklyn Nicholson
42bc07d107