Docs: revision history for form controls

file-format-parity.md, target-app-parity.md and ui-parity.md gave form
controls a new timestamp line without a matching revision-history row;
each now has one. The file-format-parity.md timestamp line keeps the
earlier change it replaced, as the other docs do.

docs/file-format-parity.md

@@ -1,6 +1,6 @@
 # File-format parity
 
-> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-31 · **Change:** minor (form controls: buttons, scroll bars and spin buttons read and written) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
+> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-31 · **Change:** minor (form controls: buttons, scroll bars and spin buttons read and written; earlier: `file.exportCsv {values: true}` writes raw values for automation; .xls dialog sheets are skipped instead of read as worksheets; `.xls` import reads each sheet's display options from WINDOW2: right-to-left, gridlines, headings, zeros, formulas; XLSX text boxes and shapes keep their paragraphs' right-to-left direction on save; CSV/TSV/TXT can open with every field kept as text via `file.open {csvAsText}`; formulas over Excel's 8,192 characters, and `%` or call chains past the nesting limit, are parse errors instead of stack overflows when a file is opened; XLSX PivotTables read and write `rowGrandTotals`/`colGrandTotals` the way Excel does, so a table saved with only one grand total opens with the right one; HTML export keeps right-to-left; CSV and text import detects likely Windows-1256 Arabic when invalid UTF-8 has Arabic byte runs; other invalid UTF-8 remains Windows-1252; HTML export places pictures and charts, as inline SVG, at their anchors) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
 
 Every format Excel opens or saves, with GridCraft's read and write support, fidelity and tests.
 Part of [target-app-parity.md](target-app-parity.md). **File formats: ~50% ready, 80–120 h**
@@ -110,6 +110,7 @@ refresh. Counted under features (Get & Transform, ~10% ready), not here.
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-31 | minor | XLSX: buttons, scroll bars and spin buttons read and written (control properties parts, `<controls>`, VML `x:ClientData`); other form controls stay with pass-through |
 | 2026-10-21 | minor | HTML (Save as Web Page) writes pictures (`data:` URI `<img>`) and charts (inline SVG from the chart crate's drawing primitives, text included) at their anchors; the table uses the sheet's column widths and row heights when the sheet has either, and output for sheets without pictures or charts is unchanged |
 | 2026-10-20 | trivial | XLSX shared strings: Japanese phonetic runs (ふりがな, `<rPh sb="…" eb="…">` with `<phoneticPr>`) are read into the workbook and written back next to the string with the same text, so an open + save no longer deletes them; bad offsets and readings are dropped with a warning, a `<phoneticPr>` without runs is kept on its own, and when duplicate `<si>` items share a text but not a reading only the first reading is written (reported on open) (`phonetic_tests.rs`) |
 | 2026-10-20 | minor | A workbook theme's major/minor per-script typefaces (`<a:font script="Arab" typeface="…"/>`, also Hebr, Jpan and the rest) are read and written back in file order after `<a:cs>`; they were dropped before. A hostile file is held to 64 entries of 256 characters |

docs/target-app-parity.md

@@ -335,6 +335,7 @@ The inventory carried over from the 2026-10-07 ROADMAP.md, updated for what land
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-31 | minor | Form controls (buttons, scroll bars, spin buttons) in Insert objects and Automation; catalog 276 / 292 → 280 / 296 (Developer › Controls) |
 | 2026-10-31 | minor | Charts move and resize from eight handles like every floating object (#190): the Essentials chart work is polish only (5–8 h), and the chart rows and the interaction discount no longer list resizing as missing; the Mainstream chart row no longer lists trendlines as missing (no score change) |
 | 2026-10-25 | minor | Automation: macro interface (Automate › Macros, the Macros and Record Macro dialogs, the step editor, shortcuts) (no score change) |
 | 2026-10-25 | trivial | Catalog count 276 / 292 in the summary table and the method, as `cargo xtask parity` measures (no score change) |

docs/ui-parity.md

@@ -195,6 +195,7 @@ scrollbar bugs 2–4 · pixel/feel pass against observed Excel 7–12.
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-31 | minor | Form controls: buttons, sliders (scroll bars) and spin buttons placed, worked, selected and edited on the sheet (Insert › Controls, Assign Action, Format Control); catalog 280 / 296 |
 | 2026-10-31 | minor | Floating objects: one selection for charts, pictures, shapes and slicers, eight resize handles with matching cursors (right-to-left sheets included), Escape drops the selection |
 | 2026-10-30 | minor | Checkbox cells print and export to PDF as boxes, as on screen: unchecked white with a grey outline, checked green with a white tick (#2972). They printed their value as TRUE or FALSE; other values in a checkbox cell still print as text |
 | 2026-10-29 | minor | Formula pointing from the keyboard: Ctrl+arrow (⌘arrow) moves the pointed cell to the edge of its data and Ctrl+Shift+arrow (⌘⇧arrow) extends the pointed range there, as the same keys move and extend the selection, so typing `=COUNTIF(`, clicking the top of a column and pressing ⌘⇧↓ points at the whole column of data; the keys used to move or extend by one cell. A range reaching the sheet edge is written as whole columns or rows (`A:B`). The editor reads the modifiers of the arrow's own key event, so a keystroke pressed and released within one frame (a control client's `ui.key`, an automation tool) keeps its Shift and Ctrl |