feat(spreadsheet): grow an ods sheet to the position a write names

[andiwand]

🤖 Generated with Claude Code

Rebased on main now that #867 has landed. The rest of step 2.1 of docs/design/spreadsheet-editing.md.

What it does

A write past the last cell of a row, past the last row, or past both had nothing to write into, so sheet_set_cell refused it. The page cannot name such a position, but the API can, and it was the last refusal that had nothing to do with what the cell holds.

grow_to_cell states the rows and the runs of empty cells it takes to reach the position, and grow_columns declares the columns the sheet stops before, so sheet_dimensions covers the new cell. A repeated row is cut first, because its cells stand for every row it repeats over — split_row_at comes out of claim_cell for that.

Placement is one rule, insert_ordered: a new child goes before the first one that has to follow it ([ODF 1.2] 9.1.2). A table:table-row therefore lands before table:named-expressions, and a table:table-column before the rows — which is after every declaration the file already states, since those all precede the rows.

Nothing caps the position: ODF states no grid limit, and the page can only name a cell it rendered. A write far past what LibreOffice holds (1024 × 1048576) still saves a valid package; LibreOffice then drops that cell.

Check

soffice --headless --convert-to csv on a grown sheet reads it back as a,7.5,, / ,,, / ,,,grown — the appended rows, cells and column declarations are what LibreOffice expects.

Test

OdfSheetWrite gains eight cases: past the row, past the last row, past both, a repeated row that stays short for its other rows, a sheet with no row at all, a save and reopen, the order against table:named-expressions, and a new declaration landing after the ones the file states.

DocumentEdit.the_ops_before_a_refusal_are_applied refused on the absent cell, which is written now; it names an absent sheet instead.

https://claude.ai/code/session_01KKFKbUVCYF2VhujdmjhhPW