[JFWooten4]

Summary

• Double-click text within a PDF paragraph to select its text and immediately copy it to the clipboard.
• Prefer PDF structure tags when available, with a visual-line fallback for untagged PDFs that respects indentation, line spacing, font-size changes, and adjacent columns.
• Join visual line wraps into readable paragraph text; respect Copy selection as Markdown and its formatting when enabled.
• Preserve normal drag selection and existing single-click navigation, use the viewer's clipboard fallback, and display success or error feedback.

Tests

• Added tests/paragraph-double-click.test.mjs to the npm test script, covering wrapped text, semantic paragraph tags, columns/headings, Markdown formatting, and double-click clipboard behavior.
• Targeted Node tests passed locally (5/5) against the paragraph grouping logic and equivalent existing copy formatter. Full repository test suite and in-browser behavior have not yet been run.

Note

For untagged PDFs, paragraph boundaries are inferred from text layout and may be approximate in unusually complex scans or multi-column layouts.