[JFWooten4]

Summary

• When Copy selection as Markdown is enabled, clicking an inline footnote reference continues to navigate to and highlight the footnote, and additionally copies the complete recovered footnote text to the clipboard as a Markdown definition ([^12]: …).
• Reuses the viewer's recovered footnote index, including continuations across pages, and shares escaping with ordinary Markdown selection copying.
• Keeps the clipboard unchanged when Markdown copying is disabled, when navigating via the footnote toolbar or document scrubber, or when no extractable note text exists. Displays a clear toast for success or clipboard failures.
• Updates the setting tooltip to explain the click-to-copy behavior.

Tests

Adds tests/footnote-click-copy.test.mjs to the npm test script, covering Markdown serialization, enabled/disabled modes, toolbar behavior, unavailable text, and clipboard errors.

Scope

Uses the existing visual footnote highlight for navigation. The clipboard copies the complete indexed footnote, including text that may not currently be rendered in the PDF text layer; this does not create a persistent native DOM text selection.