## Why
Copied table selections became code blocks containing the rendered grid, losing table structure. Stripping trailing whitespace from completed responses also removed Markdown hard breaks and spaces in code.
## What changed
- Reconstruct Markdown tables from selected cells across grid and record layouts, preserving alignment, inline formatting, and list or blockquote nesting.
- Copy a single selected cell as inline content and leave unselected cells empty without adding their text. Escape literal pipes in table code spans and link destinations.
- Preserve trailing whitespace on lines unchanged by assistant directive removal.
- Keep blank rows in copied text without painting newline selection highlights on empty rows.
## Testing
Add regression coverage for wrapped and rewrapped tables, partial selections, empty cells, literal pipes, and separate table and code blocks. Update snapshots for nested tables and selection highlights, and verify completed-response copying preserves hard breaks and code whitespace.
GitOrigin-RevId: 661e4c8331f2737bedff286548f9343bac44e0cb
Felipe Coury
75a714843b