v2.8.5.1: Zotero 10 compatibility rebuild

Repackages upstream commit 2acd947 with Zotero 10 compatibility embedded in the XPI. The upstream v2.8.5 asset still caps compatibility at Zotero 9 as of September 17, 2026.

• Version 2.8.5.1 replaces the incompatible 2.8.5 package.
• Keeps the plugin ID and settings; updates point to this fork.
• Runtime source is unchanged from upstream main.
• All 965 tests pass; bundle, XPI integrity, compatibility bounds, and update hash verified.
• This build has not been live-tested in Zotero.

Install the attached XPI via Zotero → Tools → Plugins → gear → Install Add-on From File.