Merge origin/main into gc-options-iteration-fields

# Conflicts: # ROADMAP.md # crates/ui-egui/src/backstage.rs # crates/ui-egui/src/i18n.rs # crates/ui-egui/tests/it/file_menu.rs # docs/function-parity.md # docs/gaps.md # docs/ui-parity.md
2026-10-29 21:26:48 -06:00 · 2026-10-23 16:28:15 -05:00
parent 5bd6cc3d04 7cf44d0fbb
commit ac890b839a
351 changed files with 32894 additions and 3017 deletions
@@ -1,6 +1,6 @@
 # Architecture

-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-10 · **Change:** major (created from the code on main; supersedes the local-only plan/architecture.md for committed docs) · **Target:** Microsoft Excel (Microsoft 365)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-14 · **Change:** minor (bound Undo's retained cell storage) · **Target:** Microsoft Excel (Microsoft 365)

 How GridCraft is built today. Rules for contributors are in [`AGENTS.md`](../AGENTS.md).

@@ -35,6 +35,9 @@ including tests, 2026-10-10.
   `data.sortAscending`) plus primitives (`cell.set`, `selection.set`, `range.setValues`).
   `Session::execute` catches escaped panics and restores the workbook (never-crash guard).
 2. **Edits** change the model through copy-on-write bands; undo keeps the previous snapshot.
+   Undo retains at most 100 steps and trims older steps when its estimated retained cell storage
+   exceeds 128 MiB. The newest step remains undoable even if that step alone exceeds the budget.
+   The estimate is a history policy, not a measure or hard cap of process memory.
 3. **Recalc** marks dependents of changed cells dirty through the dependency graph (with range
   nodes for range dependents), evaluates in topological order, spills dynamic arrays and reports
   `#SPILL!`/cycles. Volatile functions are always dirty.
@@ -68,4 +71,5 @@ rpm, tarball), FreeBSD, and web (WASM; WebGPU or WebGL2). Release workflows in

 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-14 | minor | Document Undo's retained-cell-storage budget and latest-step guarantee |
 | 2026-10-10 | major | Created from the code on main: crates, layers, data flow, agent control, known gaps |
@@ -1,13 +1,13 @@
 # Chart parity

-> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-12 · **Change:** trivial (chart sheets are kept on save, still not editable (#727); previously minor: trendlines: model, XLSX round-trip, drawing, Add Chart Element) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
+> **Last reviewed:** 2026-10-18 · **Last updated:** 2026-10-18 · **Change:** trivial (stale chart notes: stock/combo, treemap/sunburst, box and waterfall kinds survive XLSX round-trip; PRs #158 and #161 merged) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4

 Excel's chart types and chart elements against GridCraft. Part of
 [target-app-parity.md](target-app-parity.md). **Breadth ~50%, ready ~30%, 40–60 h** (estimated).

 Sources: `crates/model/src/features.rs` (`ChartKind`, `Chart`, `Series`), `crates/chart/src`
-(layout and rendering), `crates/xlsx/src/chart.rs` (DrawingML chart parts), merged PRs #62 and #116,
-open PRs #158, #161, and issue #190.
+(layout and rendering), `crates/xlsx/src/chart.rs` (DrawingML chart parts), merged PRs #62, #116,
+#158 and #161, and issue #190.

 ## Chart types

@@ -20,13 +20,15 @@ open PRs #158, #161, and issue #190.
 | Area | area, stacked, 100%, 3-D ×3 | 2 of 6 | no 100%, no 3-D |
 | X Y (scatter) | markers, smooth lines (±markers), straight lines (±markers) | 2 of 5 | no smooth lines |
 | Bubble | bubble, 3-D bubble | 1 of 2 | |
-| Stock | high-low-close, open-high-low-close, volume-HLC, volume-OHLC | 1 kind | combo/stock lose their kind in XLSX (PR #158) |
+| Stock | high-low-close, open-high-low-close, volume-HLC, volume-OHLC | 1 kind | |
 | Surface | 3-D surface, wireframe, contour, wireframe contour | 0 of 4 | |
 | Radar | radar, with markers, filled | 1 of 3 | |
-| Treemap, Sunburst | 1 each | 2 of 2 | lose their kind in XLSX (PR #161) |
+| Treemap, Sunburst | 1 each | 2 of 2 | |
 | Histogram, Pareto | 2 | 1 of 2 | no Pareto |
-| Box & Whisker | 1 | 1 of 1 | loses its kind in XLSX (PR #161) |
+| Box & Whisker | 1 | 1 of 1 | exclusive (default) and inclusive quartiles per series; XLSX round-trip; `chart.set {quartiles}` changes all series |
 | Waterfall, Funnel | 2 | 2 of 2 | lose their kind in XLSX (PR #161) |
+| Box & Whisker | 1 | 1 of 1 | |
+| Waterfall, Funnel | 2 | 2 of 2 | |
 | Filled map | 1 | 0 | needs geographic boundary data (licensing decision) |
 | Combo | custom combinations, secondary axis | yes (line on secondary axis) | |
 | **Total** | ~60 subtypes | **25 (~42%)** | usage-weighted breadth higher (~65%): column, bar, line, pie and scatter dominate |
@@ -41,6 +43,7 @@ open PRs #158, #161, and issue #190.
 | Data labels | value, category, series, percentage, from cells, callouts, position | one on/off flag |
 | Gridlines | major/minor per axis, formatting | one on/off flag |
 | Axis options | min/max/units, log scale, reverse order, crossing point, display units, date axis, number format | **missing** (auto only) |
+| Multi-level category axis (a category range two or more columns wide beside the values: year beside month) | the outer levels grouped under the labels with separators | read (`multiLvlStrRef`), drawn (rows under the labels; columns beside them in bar charts; up to three outer levels), written back with Excel's level caches |
 | Secondary axis | any series | line series in combo charts |
 | Trendlines | linear, exponential, logarithmic, polynomial, power, moving average, equation and R² | all six types, several per series, name, forward/backward forecast, set intercept, equation and R² label, line colour/width/dash; read, written and drawn on 2-D column, bar, line, area, scatter and bubble series; `chart.addElement` `trendline` adds/removes them. No Format Trendline pane, label position/number format not kept |
 | Error bars | fixed, %, standard deviation/error, custom | **missing** |
@@ -66,20 +69,31 @@ extensions) is lost when GridCraft saves a workbook it opened. That is the main
 **~30% ready**: a user who opens an Excel workbook with charts and saves it gets simpler charts
 back.

+Series data, categories and names may refer to defined names, as dynamic (OFFSET) ranges do:
+Excel writes a workbook-scoped name as `[0]!Name` in `<c:f>`. GridCraft reads it as the bare
+name and writes it back with `[0]!`; a sheet-scoped name is written `Sheet!Name`. Excel needs the
+qualifier: with a bare name in `<c:f>` it draws the whole chart blank, without a repair prompt
+(observed in Excel for Windows, Microsoft 365). External books (`[1]Sheet1!…`) are kept as they
+are (#1686). Such series get no `numCache`/`strCache` on save (#1690).
+
 ## Work (40–60 h)

-1. Kinds survive XLSX round-trip (merge PRs #158, #161): 2–4 h. Chart resizing (#190): 1–2 h.
+1. Chart resizing (#190): 1–2 h.
 2. Preserve unmodelled chart XML on round-trip (keep the original part, patch only edited fields): 6–10 h.
 3. Axis options, label options, gridlines per axis, legend formatting: 10–15 h.
 4. Error bars; Format Trendline pane (trendlines landed): 4–6 h.
 5. Per-element Format pane parity, smoothed lines, exploded pie, pie/bar of pie, 100% variants: 8–12 h.
 6. 3-D column/bar/pie/area, surface and contour, Pareto: 8–12 h.
-7. Chart sheets, templates, PivotChart field buttons and multi-level categories: 6–10 h. Filled map: owner decision on boundary data.
+7. Chart sheets, templates and PivotChart field buttons: 5–8 h. Filled map: owner decision on boundary data.

 ## Revision history

 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-18 | trivial | Stale notes: stock/combo, treemap/sunburst, box and waterfall kinds survive XLSX round-trip (PRs #158, #161) |
+| 2026-10-16 | trivial | Series that refer to defined names (`[0]!Name`, `Sheet!Name`) resolve instead of showing `#NAME?`, and are saved qualified, as Excel needs (#1686) |
+| 2026-10-16 | minor | Box & whisker quartiles default to exclusive, honor each series on draw and XLSX round-trip; `chart.set {quartiles}` changes the method (#1453) |
+| 2026-10-13 | minor | Multi-level category axes: read, drawn (outer levels under or beside the labels), written back with level caches |
 | 2026-10-12 | trivial | chart sheets are kept on save, still not editable (#727) |
 | 2026-10-11 | minor | Trendlines: all six types modelled, round-tripped through `c:trendline`, drawn with forecast and equation/R² labels; `chart.addElement` `trendline` |
 | 2026-10-11 | minor | PivotCharts (`insert.pivotChart`) |
@@ -24,7 +24,7 @@ cargo install --path apps/gridcraft-cli     # or: cargo run -p gridcraft-cli --
 |---|---|
 | `info <file> [--json]` | `gridcraft-cli info book.xlsx` — sheets, used ranges, cell counts, tables, charts, names. |
 | `convert <in> <out> [--sheet NAME]` | `gridcraft-cli convert book.xlsx data.csv --sheet Sales` — output format from the extension: `.xlsx`, `.csv`, `.tsv`, `.json`, `.html`. |
-| `eval <formula> [--in FILE] [--sheet S] [--cell A1] [--json]` | `gridcraft-cli eval '=PMT(5%/12,360,-300000)'`; `gridcraft-cli eval '=SUM(B2:B9)' --in book.xlsx` |
+| `eval <formula> [--in FILE] [--sheet S] [--cell A1] [--json]` | `gridcraft-cli eval '=PMT(5%/12,360,-300000)'`; `gridcraft-cli eval '=SUM(B2:B9)' --in book.xlsx` — formulas in English with `,` between arguments. A formula that couldn't be entered in a cell (it doesn't parse, or a function gets the wrong number of arguments) is an error saying why; an unknown function is `#NAME?`, as in Excel. |
 | `cat <file> [--range R] [--sheet S] [--formulas] [--csv]` | `gridcraft-cli cat book.xlsx --range A1:F20` — aligned table of displayed values. |
 | `check <file-or-dir>... [--json] [--tolerance 1e-9] [--max-report N]` | `gridcraft-cli check corpus/` — calc oracle and XLSX round-trip fidelity, see below. |
 | `run …` | see below |
@@ -102,7 +102,11 @@ sheet's rules in priority order, priority numbers aside), `validations`, `charts
 `hyperlinks`, `pivots`. `#SPILL!`/`#CALC!` compare equal to `#VALUE!` and `#CIRC!` to 0, as
 that's what the file format stores.

-Files that fail to open are reported with GridCraft's error and don't stop the run. Exit code: 0 when every file
+Files that fail to open are reported with GridCraft's error and don't stop the run. Unreadable directories,
+directory-entry/metadata errors, and subtrees or files omitted by the depth (32) and file (100,000) limits appear
+as failed path reports too, in both human and JSON output. Intentional hidden/lock-file exclusions remain ignored.
+JSON `totals.files` includes failed discovery paths; `totals.opened` counts only workbooks that opened successfully.
+An empty scan fails with a diagnostic. Exit code: 0 when at least one file was checked, discovery was complete, and every file
 opened with no mismatch and no round-trip difference, 1 otherwise, 2 on a usage error. `--max-report` caps the
 examples listed per file and category (counts are always complete).

@@ -15,24 +15,28 @@ Then send newline-delimited JSON to `127.0.0.1:7979`. Every request line gets on

 Errors come back as `{"id": …, "ok": false, "error": "…"}`.

+A line that is not a JSON object with a string `method` (an HTTP request, text that isn't JSON,
+bytes that aren't UTF-8, a line over 64 MiB) gets one error reply and the server closes the
+connection; nothing sent after it runs. Blank lines are skipped.
+
 ## Methods

 | Method | Params | What it does |
 |---|---|---|
-| `engine.execute` | `{command, params}` | Runs any engine command (see `engine.commands` or `gridcraft-cli commands`) |
+| `engine.execute` | `{command, params}` | Runs any engine command (see `engine.commands` or `gridcraft-cli commands`). `edit.goTo`, `edit.goToSpecial`, `selection.set` and `selection.move` scroll the active cell into view, as Go To does in the window |
 | `engine.commands` | `{search?}` | Every command: id, label, ribbon path, shortcut, params doc, enabled; `search` keeps those whose id, label or ribbon path contains it (case-insensitive) |
-| `engine.journal` | | Commands run so far (replayable). Passwords (`password`, `…Password` params) are left out, so a replayed Protect Sheet has no password |
+| `engine.journal` | | Commands run so far (replayable). Passwords (`password`, `…Password` params) are left out, so a replayed Protect Sheet has no password. Capped at 10,000 entries and 64 MB (serialized); past either cap the oldest entries go |
 | `document.inspect` | | Workbook summary: sheets, used ranges, tables, charts, names, selection, undo labels |
 | `sheet.read` | `{range?, sheet?, formulas?, formatted?}` | Values (or formulas / displayed text) of a range |
 | `cell.get` | `{cell?}` | One cell: value, formula, displayed text, style, merge, comment, link |
 | `ui.inspect` | | UI state: ribbon tab, editor, open dialog, Backstage page, message, grid rect, scroll, perf |
-| `ui.click` / `ui.drag` / `ui.move` | `{x, y, toX?, toY?, button?, count?, shift?, cmd?, alt?}` | Real pointer input in window points |
-| `ui.cell.click` / `ui.cell.drag` | `{cell}` / `{from, to}` | Pointer input at a cell's centre (works in point mode while editing) |
+| `ui.click` / `ui.drag` / `ui.move` | `{x, y, toX?, toY?, button?, count?, shift?, cmd?, alt?}` | Real pointer input in window points; refused with an error if it would leave more than 10,000 pointer events queued |
+| `ui.cell.click` / `ui.cell.drag` | `{cell}` / `{from, to}` | Pointer input at a cell's centre (works in point mode while editing); same 10,000-event queue limit |
 | `ui.key` / `ui.text` | `{key, shift?, cmd?, alt?, ctrl?}` / `{text}` | Keyboard input (typing in the grid starts editing) |
 | `ui.edit.begin` / `ui.edit.text` / `ui.edit.commit` / `ui.edit.cancel` | `{text?}` / `{move?: down\|right\|up\|left\|none}` | Drive the cell editor |
 | `ui.ribbon` | `{tab}` | Switch ribbon tab |
-| `ui.dialog` / `ui.dialog.set` / `ui.dialog.confirm` / `ui.dialog.cancel` | `{name}` / `{field, value}` | Open, fill in and confirm dialogs |
-| `ui.backstage` (via `engine.execute`) | `{page?: home\|new\|open\|info\|saveAs\|print\|export\|options\|close}` | Open the File tab's Backstage view on a page, or close it (`ui.inspect` reports the open page as `backstage`) |
+| `ui.dialog` / `ui.dialog.set` / `ui.dialog.confirm` / `ui.dialog.cancel` | `{name}` / `{field, value}` | Open, fill in and confirm dialogs; `confirm` runs the dialog's command with the same parameters as its OK button |
+| `ui.backstage` (via `engine.execute`) | `{page?: home\|new\|open\|info\|saveAs\|print\|export\|options\|account\|close}` | Open the File tab's Backstage view on a page, or close it (`ui.inspect` reports the open page as `backstage`) |
 | `ui.screenshot` | `{path?}` | PNG of the window (base64 when no path). Animations are settled first: the picture shows the final state |
 | `ui.set` | `{dark?, formulaBar?, ribbonCollapsed?, animations?}` | UI preferences (`formulaBar` runs `view.formulaBar`) |
 | `ui.resize` / `ui.focus` | `{width, height}` | Window control |
@@ -52,8 +56,9 @@ the View ▸ Animations checkbox, saved with the other UI preferences and on by

 `{command: "app.language.set", params: {language: "ja"}}` switches the interface language
 (`code` is accepted as an alias for `language`); `app.language.english` and
-`app.language.japanese` are shortcuts. Only interface chrome is translated, never command ids or
-document text. The choice is saved in `ui.json`; with nothing saved the desktop app follows the
+`app.language.japanese` are shortcuts. `engine.commands` lists every code it takes (`en`, `es`,
+`zh`, `ja`, `ko`, `ru`, `pt`, `de`, `cs`, `fr`, `sr`), as does the error for an unknown one. Only
+interface chrome is translated, never command ids or document text. The choice is saved in `ui.json`; with nothing saved the desktop app follows the
 system language.

 `{command: "file.open", params: {path: "Secret.xlsx", password: "…"}}` opens a password-protected
@@ -1,5 +1,14 @@
 # Decisions

+## Bound repeated XLSX column expansion (#1022)
+
+Limit each worksheet to 1,000,000 nondefault column assignments across all `<cols>` blocks.
+This allows more than 60 full-grid passes while bounding repeated work on overlapping spans;
+counting only the final map size would not limit that work. Charge each clipped span before
+inserting it, after the existing default-record skip. Exceeding the limit returns the existing
+`IoError::TooLarge`, which aborts the import instead of silently dropping a partially read sheet.
+Keep the current last-wins semantics rather than introduce interval storage or normalization.
+
 ## Formula localization uses the existing interface preference

 PR #98 builds on the persisted `UiState.language` introduced by #31 and extended by #104.
@@ -1,6 +1,6 @@
 # File-format parity

-> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-12 · **Change:** trivial (XLSX chart sheets are kept on save (#727); previously minor: CSV save keeps the separator it was opened with) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
+> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-21 · **Change:** minor (.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**
@@ -11,8 +11,17 @@ documentation (the Office bundle is off limits under this repo's clean-room rule
 support comes from `crates/engine/src/io.rs` (`FileKind`), `crates/xlsx/src` and the tests in
 `crates/xlsx/src/tests/` (round-trip, fixtures, malformed input, CSV, ODS, XLSB, XLS, PivotTables).

+Legacy scalar `INDEX(range, MATCH(...))` formulas remain ordinary formulas on save, including when
+shared formulas are expanded during import (`array_export.rs`, #1505).
+
 ## Workbook formats

+XLSX column declarations are limited to 1,000,000 expanded column assignments per worksheet,
+including repeated overlaps across `<cols>` blocks. Spans are clipped to the grid and records
+that would be skipped as defaults are excluded before charging the limit. Excess work returns
+the existing file-too-large error; accepted overlaps retain their existing last-wins behavior
+(#1022).
+
 Ink created with Draw is written as standard, unfilled DrawingML polylines, without visible point
 captions or private metadata. Supported numeric polylines reopen as editable ink, retaining points,
 colour, integer width and anchor. Curves, filled paths, transforms and unsupported line styles are
@@ -20,16 +29,32 @@ not interpreted as ink. This does not implement Office InkML or fix inserted ico
 Command and package tests cover repeated saves and unrelated cell edits; external Excel rendering
 and repair-free opening remain unverified.

+Dynamic-array formulas keep their mark on save. A formula read with dynamic-array cell metadata
+(`cm`, the `XLDAPR` record in `xl/metadata.xml`) is written back with it, together with the
+metadata part, even when it returns one value and GridCraft's own shape analysis would not need
+array evaluation. Dropping the mark turned such formulas into legacy ones, which Excel evaluates
+with implicit intersection: `SUMPRODUCT(IFERROR(B1:B3/C1:C3,0))` recalculated to a different
+value in Excel. Moving the formula, inserting or deleting rows and columns, and renaming sheets or
+names keep the mark; retyping the formula drops it, and the writer then decides from the
+formula's shape. Rich-value metadata other than cell pictures (data types, `#SPILL!` error
+values) is still dropped.
+
 | Format | Excel | GridCraft read | GridCraft write | Fidelity / notes | Tests |
 |---|---|---|---|---|---|
+| `.xlsx` Excel Workbook (transitional) | R/W, native | yes | yes | Cells, shared/array/dynamic formulas, shared strings (with their Japanese phonetic runs — ふりがな — kept through open + save: `<rPh>` offsets and readings and `<phoneticPr>` are written back next to the same string; the table holds each text once, so duplicate `<si>` items whose text is the same but whose readings differ keep only the first reading, with a warning on open), styles, themes, merges, CF, validation, tables, comments and notes, hyperlinks, names, freeze panes, outline, print settings, pictures, shapes, charts (simplified, see [chart-parity.md](chart-parity.md)), sparklines, PivotTables (caches and tables), protection, calc settings, show objects (`workbookPr showObjects`). **Kept unchanged on save (pass-through, `passthrough.rs`):** custom document properties, ribbon customisation and add-in task panes, custom XML, links to external workbooks (never followed or refreshed), data connections, sheet query tables, printer settings (#324), form controls, ActiveX controls, OLE objects and sheet backgrounds (with their VML shapes), and chart sheets (#727: the sheet, drawing, chart, style and colour parts are written back unchanged in their place, and left out when a sheet they plot was deleted or renamed or a worksheet took their name; they can't be edited or created); dropped when their sheet is deleted or their parts point at content GridCraft rewrites. **Not preserved:** slicers and slicer caches, timelines, data model, query tables attached to tables, sheet and workbook `extLst` entries we don't model, chart details; Strict Open XML files keep nothing. Never checked in Excel across a corpus: repair prompts unknown. 100 MB files fail (#175) A picture used on several sheets is written once (#985). | `roundtrip.rs`, `fixtures.rs`, `malformed.rs`, `pivot_tests.rs` |
+| `.xlsx` Excel Workbook (transitional) | R/W, native | yes | yes | Cells, shared/array/dynamic formulas, shared strings (with their Japanese phonetic runs — ふりがな — kept through open + save: `<rPh>` offsets and readings and `<phoneticPr>` are written back next to the same string; the table holds each text once, so duplicate `<si>` items whose text is the same but whose readings differ keep only the first reading, with a warning on open), styles, themes, merges, CF, validation, tables, notes (with their shown/hidden state) and threaded comments with replies, resolved state and timestamps (`threadedComments` and `persons` parts, #300), hyperlinks, names, freeze panes, outline, print settings, pictures, shapes, charts (simplified, see [chart-parity.md](chart-parity.md)), sparklines, PivotTables (caches and tables), protection, calc settings, show objects (`workbookPr showObjects`). **Not preserved:** unmodelled parts and extensions (form controls, slicer caches, timelines, external links, OLE objects, custom XML, data model, query tables, chart details). Never checked in Excel across a corpus: repair prompts unknown. 100 MB files fail (#175) A picture used on several sheets is written once (#985). | `roundtrip.rs`, `fixtures.rs`, `malformed.rs`, `pivot_tests.rs` |
+| `.xlsx` Excel Workbook (transitional) | R/W, native | yes | yes | Cells, shared/array/dynamic formulas, shared strings (with their Japanese phonetic runs — ふりがな — kept through open + save: `<rPh>` offsets and readings and `<phoneticPr>` are written back next to the same string; the table holds each text once, so duplicate `<si>` items whose text is the same but whose readings differ keep only the first reading, with a warning on open), styles, themes, merges, CF, validation, tables, comments and notes, hyperlinks, names, freeze panes, outline, print settings, pictures, shapes, charts (simplified, see [chart-parity.md](chart-parity.md)), sparklines, PivotTables (caches and tables), protection, Allow Edit Ranges (`protectedRanges` with their password hashes, #307), calc settings, show objects (`workbookPr showObjects`). **Not preserved:** unmodelled parts and extensions (form controls, slicer caches, timelines, external links, OLE objects, custom XML, data model, query tables, chart details). Never checked in Excel across a corpus: repair prompts unknown. 100 MB files fail (#175) A picture used on several sheets is written once (#985). | `roundtrip.rs`, `fixtures.rs`, `malformed.rs`, `pivot_tests.rs` |
+| `.xlsx` Excel Workbook (transitional) | R/W, native | yes | yes | Cells, shared/array/dynamic formulas, styles, themes (the major/minor `latin`, East Asian `ea` and complex-script `cs` typefaces and the per-script `<a:font script>` lists are kept through a save), merges, CF, validation, tables, comments and notes, hyperlinks, names, freeze panes, outline, print settings, pictures, shapes, charts (simplified, see [chart-parity.md](chart-parity.md)), sparklines, PivotTables (caches and tables), protection, calc settings. **Kept unchanged on save (pass-through, `passthrough.rs`):** custom document properties, ribbon customisation and add-in task panes, custom XML, links to external workbooks (never followed or refreshed), data connections, sheet query tables, printer settings (#324), form controls, ActiveX controls, OLE objects and sheet backgrounds (with their VML shapes), pictures in headers and footers (`&G`, #1257: their VML drawing and images are written back unchanged; they are not shown, and can't be inserted), and chart sheets (#727: the sheet, drawing, chart, style and colour parts are written back unchanged in their place, and left out when a sheet they plot was deleted or renamed or a worksheet took their name; they can't be edited or created); dropped when their sheet is deleted or their parts point at content GridCraft rewrites. **Not preserved:** slicers and slicer caches, timelines, data model, query tables attached to tables, sheet and workbook `extLst` entries we don't model, chart details; Strict Open XML files keep nothing. Never checked in Excel across a corpus: repair prompts unknown. 100 MB files fail (#175) | `roundtrip.rs`, `fixtures.rs`, `malformed.rs`, `pivot_tests.rs` |
+| `.xlsx` Excel Workbook (transitional) | R/W, native | yes | yes | Cells, shared/array/dynamic formulas, styles, themes (the major/minor `latin`, East Asian `ea` and complex-script `cs` typefaces and the per-script `<a:font script>` lists are kept through a save), merges, CF, validation, tables, notes (with their shown/hidden state) and threaded comments with replies, resolved state and timestamps (`threadedComments` and `persons` parts, #300), hyperlinks, names, freeze panes, outline, print settings, pictures, shapes, charts (simplified, see [chart-parity.md](chart-parity.md)), sparklines, PivotTables (caches and tables), protection, calc settings. **Not preserved:** unmodelled parts and extensions (form controls, slicer caches, timelines, external links, OLE objects, custom XML, data model, query tables, chart details). Never checked in Excel across a corpus: repair prompts unknown. 100 MB files fail (#175) | `roundtrip.rs`, `fixtures.rs`, `malformed.rs`, `pivot_tests.rs` |
+| `.xlsx` Excel Workbook (transitional) | R/W, native | yes | yes | Cells, shared/array/dynamic formulas, styles, themes (the major/minor `latin`, East Asian `ea` and complex-script `cs` typefaces and the per-script `<a:font script>` lists are kept through a save), merges, CF, validation, tables, comments and notes, hyperlinks, names, freeze panes, outline, print settings, pictures, shapes, charts (simplified, see [chart-parity.md](chart-parity.md)), sparklines, PivotTables (caches and tables), protection, Allow Edit Ranges (`protectedRanges` with their password hashes, #307), calc settings. **Not preserved:** unmodelled parts and extensions (form controls, slicer caches, timelines, external links, OLE objects, custom XML, data model, query tables, chart details). Never checked in Excel across a corpus: repair prompts unknown. 100 MB files fail (#175) | `roundtrip.rs`, `fixtures.rs`, `malformed.rs`, `pivot_tests.rs` |
 | `.xlsx` Excel Workbook (transitional) | R/W, native | yes | yes | Cells, shared/array/dynamic formulas, styles, themes, merges, CF, validation, tables, comments and notes, hyperlinks, names, freeze panes, outline, print settings, pictures, shapes, charts (simplified, see [chart-parity.md](chart-parity.md)), sparklines, PivotTables (caches and tables), protection, calc settings. **Kept unchanged on save (pass-through, `passthrough.rs`):** custom document properties, ribbon customisation and add-in task panes, custom XML, links to external workbooks (never followed or refreshed), data connections, sheet query tables, printer settings (#324), form controls, ActiveX controls, OLE objects and sheet backgrounds (with their VML shapes), and chart sheets (#727: the sheet, drawing, chart, style and colour parts are written back unchanged in their place, and left out when a sheet they plot was deleted or renamed or a worksheet took their name; they can't be edited or created); dropped when their sheet is deleted or their parts point at content GridCraft rewrites. **Not preserved:** slicers and slicer caches, timelines, data model, query tables attached to tables, sheet and workbook `extLst` entries we don't model, chart details; Strict Open XML files keep nothing. Never checked in Excel across a corpus: repair prompts unknown. 100 MB files fail (#175) | `roundtrip.rs`, `fixtures.rs`, `malformed.rs`, `pivot_tests.rs` |
-| `.xlsx` Excel Workbook (transitional) | R/W, native | yes | yes | Cells, shared/array/dynamic formulas, styles, themes, merges, CF, validation, tables, notes (with their shown/hidden state) and threaded comments with replies, resolved state and timestamps (`threadedComments` and `persons` parts, #300), hyperlinks, names, freeze panes, outline, print settings, pictures, shapes, charts (simplified, see [chart-parity.md](chart-parity.md)), sparklines, PivotTables (caches and tables), protection, calc settings. **Not preserved:** unmodelled parts and extensions (form controls, slicer caches, timelines, external links, OLE objects, custom XML, data model, query tables, chart details). Never checked in Excel across a corpus: repair prompts unknown. 100 MB files fail (#175) | `roundtrip.rs`, `fixtures.rs`, `malformed.rs`, `pivot_tests.rs` |
+| `.xlsx` Excel Workbook (transitional) | R/W, native | yes | yes | Cells, shared/array/dynamic formulas, styles, themes, merges, CF, validation, tables, notes (with their shown/hidden state and their box's place and size, #1608) and threaded comments with replies, resolved state and timestamps (`threadedComments` and `persons` parts, #300), hyperlinks, names, freeze panes, outline, print settings, pictures, shapes, charts (simplified, see [chart-parity.md](chart-parity.md)), sparklines, PivotTables (caches and tables), protection, calc settings. **Not preserved:** unmodelled parts and extensions (form controls, slicer caches, timelines, external links, OLE objects, custom XML, data model, query tables, chart details). Never checked in Excel across a corpus: repair prompts unknown. 100 MB files fail (#175) | `roundtrip.rs`, `fixtures.rs`, `malformed.rs`, `pivot_tests.rs` |
 | `.xlsx` Excel Workbook (transitional) | R/W, native | yes | yes | Cells, shared/array/dynamic formulas, styles, themes, merges, CF, validation, tables, comments and notes, hyperlinks, names, freeze panes, outline, print settings, pictures, shapes, charts (simplified, see [chart-parity.md](chart-parity.md)), sparklines, PivotTables (caches and tables), protection, Allow Edit Ranges (`protectedRanges` with their password hashes, #307), calc settings. **Not preserved:** unmodelled parts and extensions (form controls, slicer caches, timelines, external links, OLE objects, custom XML, data model, query tables, chart details). Never checked in Excel across a corpus: repair prompts unknown. 100 MB files fail (#175) | `roundtrip.rs`, `fixtures.rs`, `malformed.rs`, `pivot_tests.rs` |
 | `.xlsx` Strict Open XML | R/W | yes | no (writes transitional) | Excel also saves transitional by default | fixtures |
 | `.xlsm` Macro-Enabled Workbook | R/W | yes | yes, macros kept, not run | The VBA project is kept byte-for-byte and written back only into `.xlsm`/`.xltm` (#6); macros never run. Saved with the macro-enabled workbook content type | `roundtrip.rs` (`vba_project_roundtrip`, `package_kind_sets_workbook_content_type`), engine `io.rs` (`macros_are_saved_only_into_xlsm`) |
 | `.xltx` / `.xltm` templates | R/W | yes | partial | Saved with the template (and macro-enabled template) content type, chosen by extension; `.xltm` keeps a VBA project, `.xltx` drops it; "new from template" behaviour missing | `roundtrip.rs` (`package_kind_sets_workbook_content_type`), engine `io.rs` |
 | `.xlsb` Binary Workbook | R/W | **values only** (#101) | no | Names, visibility, numbers, text, booleans, errors, merges, cached formula results; no formulas, formatting, charts, names | `xlsb_tests.rs` |
-| `.xls` Excel 97-2003 (BIFF8) | R/W | **yes, partial** (#121) | no (Save As `.xlsx`) | Clean-room from [MS-CFB] and [MS-XLS]. Read: worksheets and visibility, shared strings, numbers, text, booleans, errors, formulas (text for the common tokens, shared and array formulas, 3-D refs, names, newer functions called by name) with cached results, number formats (dates display as dates), 1904 date system, merges, column widths, row heights, defined names, print area and titles, calculation settings (mode, iteration with its maximum iterations and change, precision as displayed). Not read: fonts, fills, borders, alignment, charts, pictures, comments, CF, validation, hyperlinks, freeze panes, external links (formula kept as its value). Chart and macro sheets skipped with a warning; encrypted (FILEPASS) and BIFF5 (Excel 5.0/95) files refused with a message. Opens as a new unsaved workbook. Unverified on a real-world corpus | `xls_tests.rs` |
+| `.xls` Excel 97-2003 (BIFF8) | R/W | **yes, partial** (#121) | no (Save As `.xlsx`) | Clean-room from [MS-CFB] and [MS-XLS]. Read: worksheets and visibility, shared strings, numbers, text, booleans, errors, formulas (text for the common tokens, shared and array formulas, 3-D refs, names, newer functions called by name) with cached results, number formats (dates display as dates), 1904 date system, merges, column widths, row heights, defined names, print area and titles, calculation settings (mode, iteration with its maximum iterations and change, precision as displayed), sheet display options (right-to-left, gridlines, headings, zero values, formulas; a truncated WINDOW2 is ignored). Not read: fonts, fills, borders, alignment, charts, pictures, comments, CF, validation, hyperlinks, freeze panes, external links (formula kept as its value). Chart and macro sheets skipped with a warning; encrypted (FILEPASS) and BIFF5 (Excel 5.0/95) files refused with a message. Opens as a new unsaved workbook. Unverified on a real-world corpus | `xls_tests.rs` |
 | `.xlt` Excel 97-2003 template | R/W | yes (read as `.xls`) | no | | — |
 | `.xlam` / `.xla` add-ins | R/W | no | no | VBA; out of scope | — |
 | `.xml` XML Spreadsheet 2003 | R/W | no | no | Simple to support | — |
@@ -41,13 +66,13 @@ and repair-free opening remain unverified.

 | Format | Excel | GridCraft read | GridCraft write | Notes |
 |---|---|---|---|---|
-| `.csv` UTF-8 / Windows / Mac / MS-DOS | R/W | yes (UTF-8 and UTF-16 BOMs, UTF-8, Windows-1252 fallback; delimiter detection) | yes (UTF-8 without BOM, CRLF; a file opened as CSV is saved with the separator it was read with, so a `;` file stays `;`; otherwise `,`) | Excel writes the **displayed** values; we write raw values. No encoding choice on save. Re-import of a single-column export splits text (#127) A used range that would write more than 512 MiB (two far-apart cells span the whole rectangle) is refused with an error instead of being expanded (#528). |
-| `.txt` tab-delimited, Unicode text | R/W | yes (`.txt`, `.tsv`, `.tab`) | yes | Text Import Wizard options partly via Text to Columns |
-| `.csv` UTF-8 / Windows / Mac / MS-DOS | R/W | yes (UTF-8 and UTF-16 BOMs, UTF-8, Windows-1252 fallback; delimiter detection) | yes (UTF-8 without BOM, CRLF) | Writes the **displayed** values like Excel (number formats applied, formula results, never column-width `#####`). No encoding choice on save. Re-import of a single-column export splits text (#127) A used range that would write more than 512 MiB (two far-apart cells span the whole rectangle) is refused with an error instead of being expanded (#528). |
-| `.txt` tab-delimited, Unicode text | R/W | yes (`.txt`, `.tsv`, `.tab`) | yes (displayed values) | Text Import Wizard options partly via Text to Columns |
+| `.csv` UTF-8 / Windows / Mac / MS-DOS | R/W | yes (UTF-8 and UTF-16 BOMs, UTF-8, likely Windows-1256 Arabic detection, otherwise Windows-1252 fallback; delimiter detection) | yes (UTF-8 without BOM, CRLF; a file opened as CSV is saved with the separator it was read with, so a `;` file stays `;`; otherwise `,`) | Excel writes the **displayed** values; we write raw values. No encoding choice on save. Re-import of a single-column export splits text (#127) A used range that would write more than 512 MiB (two far-apart cells span the whole rectangle) is refused with an error instead of being expanded (#528). |
+| `.txt` tab-delimited, Unicode text | R/W | yes (`.txt`, `.tsv`, `.tab`; likely Windows-1256 Arabic detection for invalid UTF-8) | yes | Text Import Wizard options partly via Text to Columns |
+| `.csv` UTF-8 / Windows / Mac / MS-DOS | R/W | yes (UTF-8 and UTF-16 BOMs, UTF-8, likely Windows-1256 Arabic detection, otherwise Windows-1252 fallback; delimiter detection) | yes (UTF-8 without BOM, CRLF) | Writes the **displayed** values like Excel (number formats applied, formula results, never column-width `#####`). No encoding choice on save. Re-import of a single-column export splits text (#127) A used range that would write more than 512 MiB (two far-apart cells span the whole rectangle) is refused with an error instead of being expanded (#528). |
+| `.txt` tab-delimited, Unicode text | R/W | yes (`.txt`, `.tsv`, `.tab`; likely Windows-1256 Arabic detection for invalid UTF-8) | yes (displayed values) | Text Import Wizard options partly via Text to Columns |
 | `.prn` formatted text (space-delimited) | R/W | no | no | |
 | `.dif`, `.slk` (SYLK) | R/W | no | no | Small, legacy |
-| `.htm` / `.html` web page | R/W (Windows) | yes, via Get Data ▸ From HTML | yes (one sheet as a table; a used range taller than 100,001 rows fails with an error instead of being cut short) | Formatting not exported |
+| `.htm` / `.html` web page | R/W (Windows) | yes, via Get Data ▸ From HTML | yes (one sheet as a table; a used range taller than 100,001 rows fails with an error instead of being cut short) | Formatting not exported. A sheet with pictures or charts is written with the sheet's own column widths and row heights, a picture as a `data:` URI `<img>` and a chart as inline SVG, each placed at its anchor; shapes, text boxes and comments are not exported |
 | `.mht` / `.mhtml` single-file web page | R/W (Windows) | no | no | |
 | `.json` | via Power Query | GridCraft's own workbook JSON (debug) and JSON import | GridCraft JSON | Not Power Query's JSON shaping; notes and hyperlinks break export (#126) |
 | `.xml` with XML maps | Developer ▸ Import/Export | no | no | |
@@ -56,7 +81,7 @@ and repair-free opening remain unverified.

 | Format | Excel | GridCraft | Notes |
 |---|---|---|---|
-| PDF | Save As / Export | yes (own PDF 1.7 writer) | Only the 14 standard PDF fonts, no embedding: **non-Latin text (CJK, Arabic, Devanagari, Thai) does not export**; web build exports without a file prompt (#141) |
+| PDF | Save As / Export | yes (own PDF 1.7 writer; CLI `convert` output) | Printed cell hyperlinks export as clickable HTTP(S)/mailto links or destinations within printed pages (#954); unsafe schemes and destinations outside the print range are omitted. Only the 14 standard PDF fonts, no embedding: **non-Latin text (CJK, Arabic, Devanagari, Thai) does not export**; web build exports without a file prompt (#141) |
 | XPS | Windows | no | Low priority |
 | Print | yes | yes (via PDF, system dialog on desktop; PR #143 for web) | |
 | Images of ranges/charts (Copy as Picture) | yes | chart raster in `crates/chart` | No range-to-image command |
@@ -85,6 +110,32 @@ refresh. Counted under features (Get & Transform, ~10% ready), not here.

 | Date | Change | Summary |
 |---|---|---|
+| 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 |
+| 2026-10-20 | trivial | A workbook theme's major/minor East Asian (`<a:ea>`) and complex-script (`<a:cs>`) typefaces are read and written back, so a Japanese theme's fonts (e.g. 游ゴシック) survive open + save; they were deleted before because the model had nowhere to keep them. Rendering still resolves fonts without them (follow-up) |
+| 2026-10-19 | minor | XLSX font charset and family values are preserved on save, retaining the character set and family used for substitute font selection |
+| 2026-10-19 | minor | CSV and text import decodes likely Windows-1256 Arabic; other invalid UTF-8 retains the Windows-1252 fallback |
+| 2026-10-19 | minor | .xls import skips dialog sheets (WsBool `fDialog`), which share the worksheet BOF type and were read as empty worksheets |
+| 2026-10-19 | minor | `.xls` import reads WINDOW2: right-to-left sheets (common in older Arabic and Hebrew files) open right-to-left, and hidden gridlines, headings and zero values and Show Formulas carry over |
+| 2026-10-19 | trivial | XLSX text boxes and shapes keep right-to-left paragraph direction (`a:pPr rtl`, ECMA-376 Part 1 §21.1.2.2.7): read from the first paragraph and written on every paragraph; output without it is unchanged |
+| 2026-10-18 | trivial | `file.open {csvAsText: true}` keeps every CSV/TSV/TXT field as the text the file holds, so identifiers (GTINs, SKUs, ZIP codes) keep their digits and leading zeros (#1808; a preference and a CLI flag are separate work) |
+| 2026-10-18 | trivial | XLSX PivotTables: `rowGrandTotals` is the Grand Total row and `colGrandTotals` the Grand Total column. Both were read and written the other way round, which a GridCraft round trip hid, so an Excel file with only one grand total opened showing the other |
+| 2026-10-19 | minor | HTML (Save as Web Page and clipboard) marks right-to-left sheets and right-to-left cell text with `dir` |
+| 2026-10-16 | trivial | XLSX charts: `[0]!Name` (a workbook-scoped defined name) in series references is read as the name, so the series resolve instead of showing `#NAME?`. Names in chart references are written qualified (`[0]!Name`, or `Sheet!Name` for a sheet-scoped name): Excel draws a chart with a bare name blank (#1686) |
+| 2026-10-16 | trivial | XLSX reads and writes the workbook's show-objects setting (`workbookPr showObjects`: all, placeholders, none), which Ctrl+6 switches; a file without it is saved without it |
+| 2026-10-16 | trivial | XLSX: pictures in headers and footers (`&G`, the VML drawing `<legacyDrawingHF>` names and its images) are kept on save; they are still not shown (#1257) |
+| 2026-10-16 | minor | XLSX column imports refuse more than 1,000,000 cumulative expanded assignments per sheet before expanding the next span; repeated overlaps cannot bypass the work limit (#1022) |
+| 2026-10-16 | minor | XLSX: a note keeps its box's place and size (`<x:Anchor>` and the VML width and height) through open and save, moving with its cell; notes made here get the default box (#1608) |
+| 2026-10-16 | minor | XLSX PivotTables: two value fields without a column field are written with `firstHeaderRow="0"` and `hideValuesRow`, so Excel 365 doesn't add a `Values` row that can turn the report into `#SPILL!` (#1447, item 6) |
+| 2026-10-16 | minor | XLSX PivotTables: a PivotChart's link to its PivotTable is written behind the workbook in brackets (`[Q1 Report.xlsx]Sheet2!PivotTable1`; `Workbook.xlsx` when the file name is unknown), so Excel binds the chart to the PivotTable instead of showing an ordinary chart; the reader drops the prefix (#1447, item 7) |
+| 2026-10-15 | minor | XLSX: formulas and PivotTable sources quote sheet names like Excel (a leading `.`, R1C1-like and cell-like names), so `'.x'!A1` no longer saves as `.x!A1`, which Excel could not open (#1458) |
+| 2026-10-15 | minor | XLSX text preserves CR and CRLF across save/reopen; shared strings use `_x000D_` and other XML text uses `&#13;` (#1488) |
+| 2026-10-15 | minor | XLSX save keeps legacy `INDEX`/`MATCH` formulas scalar instead of marking them as dynamic arrays (#1505) |
+| 2026-10-14 | trivial | Formula parser: text longer than Excel's 8,192 characters, and postfix chains (`1%%%…`, `f(1)(1)…`) past the 256-level nesting limit, are parse errors (the cell keeps its formula text and cached value) instead of trees deep enough to overflow the stack when a hostile file is opened, saved or dropped |
+| 2026-10-14 | minor | XLSX formulas read with dynamic-array metadata (`cm`) keep it on save, so Excel does not recalculate them with implicit intersection |
+| 2026-10-14 | minor | PDF export writes clickable annotations for safe cell URLs and destinations on printed pages; CLI `convert` accepts `.pdf` output (#954) |
+| 2026-10-13 | trivial | XLSX export keeps a picture shared by several sheets as one media part (#985) |
 | 2026-10-12 | trivial | XLSX chart sheets are kept on save (#727) |
 | 2026-10-12 | trivial | CSV and TSV export is capped at 512 MiB and refuses a larger used range with an error (#528) |
 | 2026-10-12 | minor | `.xls` import reads the calculation settings (CalcMode, CalcIter, CalcCount, CalcDelta, CalcPrecision), so circular models calculate instead of showing `#CIRC!` (#724) |
@@ -1,6 +1,6 @@
 # Function parity: worksheet functions and formulas

-> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-15 · **Change:** minor (iterative calculation settings in File › Options) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
+> **Last reviewed:** 2026-10-15 · **Last updated:** 2026-10-21 · **Change:** minor (SUBTOTAL and AGGREGATE cap the cells they visit, #2175) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4

 Excel's worksheet functions, category by category, against GridCraft's function library. Part of
 [target-app-parity.md](target-app-parity.md); gaps feed [gaps.md](gaps.md).
@@ -55,6 +55,11 @@ By the Excel version that introduced them (working / total): before 2010 346 / 3
 Dynamic-array and LAMBDA-era functions (FILTER, SORT, UNIQUE, XLOOKUP, VSTACK, TAKE, GROUPBY,
 PIVOTBY, REGEXTEST…) are all present.

+FORECAST.ETS missing-point interpolation walks known points once, so filling a long gap takes
+linear work in the completed timeline length (#1042). Interpolation values, nearest-value
+endpoint handling, zero-fill mode and the existing 30% missing-point limit are unchanged.
+This improves series preparation; it does not change the model-fitting or seasonality algorithms.
+
 ### Scope of what's missing

 | Function(s) | In scope? | Estimate | Note |
@@ -72,17 +77,21 @@ PIVOTBY, REGEXTEST…) are all present.
 | Feature | Status |
 |---|---|
 | A1 and R1C1 references, absolute/relative/mixed, F4 cycling | done |
-| 3-D references (`Sheet1:Sheet3!A1`) | done; endpoint-deletion bug (#140) |
+| 3-D references (`Sheet1:Sheet3!A1`) | done; deleting a span's end sheet keeps the rest (#140) |
 | Structured references (`Table1[Col]`, `[#Totals]`, `@`; the unbracketed `[[#This Row],Col]` some writers emit) | done |
 | Defined names (workbook and sheet scope), Create from Selection | done |
-| Dynamic arrays, spill, `#SPILL!`, spill operator `A1#` | done; stale-spill bugs (#133, #139; PRs #148, #157) |
+| Dynamic arrays, spill, `#SPILL!`, spill operator `A1#` | done; stale spills after a structural edit or a cleared blocker fixed (#133, #139; PRs #148, #157) |
+| Recalculation after clearing large sparse ranges | every stored cell changed by Clear is reported to recalculation, without a million-coordinate cutoff; removed formula spills are cleared, and removing empty merges still unblocks spills (#1032) |
+| SUBTOTAL / AGGREGATE input size | references trim to the used range; all areas, arrays and values of one call are charged against the 16-million-cell limit before any cell is read (skipped hidden, nested and error cells count), and `#NUM!` past it (#2175) |
 | Implicit intersection `@`, legacy CSE array formulas | done; legacy array range fill (PR #156) |
+| Implicit intersection `@`, legacy CSE array formulas | done, the entered range filled (PR #156) |
 | Trim references `A1:.E10` (trailing), `A1.:E10` (leading), `A1.:.E10` (both), also on whole rows/columns (`A:.A`) | done; evaluated as `TRIMRANGE(range, code, code)`, adjusted on insert/delete; files store `_xlfn.TRIMRANGE(range,code,code)` (Excel's own file spelling unconfirmed in public docs), `_xlfn._TRO_ALL/_TRO_LEADING/_TRO_TRAILING(...)` read too |
 | LET, LAMBDA, named LAMBDAs, ISOMITTED, MAP/REDUCE/SCAN/BYROW/BYCOL/MAKEARRAY | done |
-| Iterative calculation for circular references | done: with Enable Iterative Calculation on (`formulas.calculationOptions` `{iterative, maxIterations, maxChange}`, saved as `<calcPr iterate iterateCount iterateDelta>`), loops are evaluated again from their previous values (blank = 0) until no cell on a loop changes by Maximum Change or Maximum Iterations is reached; off, cycles give `#CIRC!`. Set in File › Options › Formulas (Enable iterative calculation, Maximum Iterations 1 to 32767, Maximum Change 0 or more; the two fields are disabled while iteration is off). Differences: GridCraft recalculates on open, so a loop that never settles (`=A1+1`) advances again each time the file is opened |
-| 15-significant-digit comparison semantics | **missing** (#57: `=0.1+0.2=0.3` is FALSE) |
+| Iterative calculation for circular references | done: with Enable Iterative Calculation on (`formulas.calculationOptions` `{iterative, maxIterations, maxChange}`, saved as `<calcPr iterate iterateCount iterateDelta>`), loops are evaluated again from their previous values (blank = 0) until no cell on a loop changes by Maximum Change or Maximum Iterations is reached; off, cycles give `#CIRC!`. Set in File › Options › Formulas (Enable iterative calculation, Maximum Iterations 1 to 32767, Maximum Change 0 or more; the two fields are disabled while iteration is off). Differences: GridCraft recalculates on open, so a loop that never settles (`=A1+1`) advances again each time the file is opened
+| 15-significant-digit comparison semantics | done (#57): `=0.1+0.2=0.3` is TRUE, and MATCH and COUNTIF compare the same way. Arithmetic keeps full precision, as Excel does — `=(0.1+0.2)-0.3` is 5.55E-17 |
 | External workbook references (`[Book.xlsx]Sheet1!A1`) | parsed; links dropped on open, no update |
 | Localized function names and `;` separators | **missing** (#45); en-US only |
+| Long flat operator chains (`=A1+A2+…`, `-`, `*`, `/`, `^`, `&`, comparisons) | done: no operand limit below Excel's 8,192-character formula limit (Excel, observed: `=1+1+…` with 4,096 operands is exactly 8,192 characters with the `=` and calculates; one more character is refused). Evaluated (#484), printed (#628), stored, copied, adjusted, saved and reopened without recursing once per operand, on a 1 MiB stack (#916); written to XLSX as plain formulas, not dynamic arrays; Spanish entry accepts them |
 | Error values | the seven classic errors plus `#SPILL!`, `#CALC!`, `#GETTING_DATA` done; `#FIELD!`, `#BLOCKED!`, `#CONNECT!`, `#BUSY!`, `#UNKNOWN!`, `#PYTHON!` missing (minor: they come from data types, cloud and Python features) |

 ## Depth (estimated)
@@ -90,7 +99,7 @@ PIVOTBY, REGEXTEST…) are all present.
 **~82% ready.** The library is broad and has 96 test functions in `crates/functions` with many
 assertions each, but there is no conformance suite against Excel-computed results, and user
 reports keep finding edge cases: MIN() with no arguments (#138), COUNTBLANK past the used range
-(#137), ROUND at 15 digits and DATE(1900,2,29) (fixed 10-09), SUMIF sum-range sizing (fixed
+(#137, and past 16,384 cells #1010, fixed 10-14 for bounded references), ROUND at 15 digits and DATE(1900,2,29) (fixed 10-09), SUMIF sum-range sizing (fixed
 10-09). Statistical distributions and financial functions with iterative solvers (RATE, IRR,
 XIRR, YIELD) are the highest-risk for last-digit differences.

@@ -100,6 +109,11 @@ fraction sections with literal text (`#\:#=/=#`, `#_#/#`), zero fractions, zero-
 denominators, `?` placeholders padding the thousands separator, and booleans through the text
 section (`TEXT(TRUE,";;;\@@\@")` = `@TRUE@`).

+`MEDIAN` and `AGGREGATE` function number 12 use an overflow-safe midpoint for even-sized
+inputs, so large finite middle values do not become `#NUM!` merely because their sum overflows (#1579).
+Sorting, argument coercion and error propagation are unchanged; this is a numerical correction
+under the documented median rule, not an extreme-value comparison against desktop Excel.
+
 Work to close (16–26 h in total): the in-scope missing functions (10–16 h with the table above),
 an oracle corpus of Excel-computed results per function (owner runs Excel on generated
 workbooks; results checked in as data, not Excel files) and fixing what it finds (6–10 h).
@@ -108,7 +122,16 @@ workbooks; results checked in as data, not Excel files) and fixing what it finds

 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-21 | minor | SUBTOTAL and AGGREGATE charge every argument against the evaluator's 16-million-cell limit before scanning; a value in XFD1048576 no longer makes `SUBTOTAL(9,A:XFD)` read the whole sheet (#2175) |
+| 2026-10-19 | minor | LET and LAMBDA names compare case-insensitively in any script, as in Excel: `=LET(dług,100,DŁUG*2)` is 200 (was #NAME?); also LET-bound lambdas called or passed by name (`żar(2)`, `MAP(…,Λ)`), `ISOMITTED`, and formula-bar alias translation (one shared `gridcraft_formula::same_name`, which matches `ß` with `ẞ` and keeps dotless `ı` apart from `i`) |
+| 2026-10-19 | minor | Long flat operator chains (#916): 4,096 operands (Excel's 8,192-character limit) no longer overflow the stack when entered, filled, adjusted or saved; chains past 64 operands are no longer saved as dynamic-array formulas; Spanish entry no longer refuses chains past 256 operands |
+| 2026-10-17 | minor | 15-significant-digit comparison moved from missing to done (#57), and the resolved caveats on the 3-D reference, dynamic-array and legacy-array rows cleared (#140, #133, #139, #156) |
+| 2026-10-16 | minor | FORECAST.ETS gap interpolation uses a forward-only known-point scan instead of rescanning each gap for every missing value; numerical behavior and missing-point limits are preserved (#1042) |
 | 2026-10-15 | minor | Iterative calculation: Maximum Iterations and Maximum Change are set in File › Options › Formulas (dropped "no Options dialog yet") |
+| 2026-10-15 | minor | MEDIAN and AGGREGATE median use an overflow-safe midpoint (#1579); regressions cover finite extremes, tiny values and dependent recalculation |
+| 2026-10-15 | minor | ADDRESS quotes a sheet name the way Excel does: names that read as an A1 cell (`A1`) or an R1C1 reference (`R1C1`, `RC`) and names starting with `.` get quotes; `TRUE` / `FALSE` stay bare (#1458) |
+| 2026-10-13 | minor | Clear reports changed stored cells sparsely, including those beyond the first million coordinates; dependent formulas and removed spills update, while clearing empty merges still unblocks spills (#1032) |
+| 2026-10-14 | minor | Bounded references up to 1,048,576 cells (`D3:AZ400`) keep their full shape instead of stopping at the used range, so `SUMPRODUCT(D3:AZ400*B3:B400,(A3:A400=x)*(D1:AZ1=y))` broadcasts like Excel and `ROWS`, `COUNTBLANK` and `--(r="")` count the blanks; references that run to the edge of the sheet (`A:A`) still stop at the used range (#1010) |
 | 2026-10-12 | minor | USDOLLAR added as a Compatibility function (not on Microsoft's list, so the counts don't change); MIRR with no positive flow is -1, COUNTIF's bare `"<="` / `">="` skip empty strings, INDIRECT with `a1` = FALSE gives `#REF!` for A1-style text (#738) |
 | 2026-10-11 | minor | TEXT / number formats fixed against Excel-cached results: fraction literals and zero fractions, `0` denominators zero padded, `?` pads the thousands separator, booleans use the text section (226 mismatches → 0 in 352 TEXT cells) |
 | 2026-10-11 | minor | Iterative calculation: circular references iterate up to Maximum Iterations / Maximum Change when enabled |
@@ -1,6 +1,6 @@
 # Gaps

-> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-15 · **Change:** minor (§6: Maximum Iterations and Maximum Change in File › Options) · **Target:** Microsoft Excel (Microsoft 365)
+> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-23 · **Change:** minor (§8: PivotTable Show Details) · **Target:** Microsoft Excel (Microsoft 365)

 Every known shortfall against Excel, one entry each, ranked by user impact (what blocks someone
 using GridCraft for real work first). This is the work list: pick from the top, check the open
@@ -42,11 +42,13 @@ No alpha blockers: every core workflow passes the [alpha gate](roadmap.md#alpha-
 - **Impact:** open-edit-save still simplifies workbooks with slicers, timelines or Power Pivot.
 - **Estimate:** 6–10 h. [file-format-parity.md](file-format-parity.md)

-### 4. Charts lose type and options on round trip; shallow chart model (F, FF)
- **Missing:** kinds that survive XLSX (stock, combo, histogram, box, waterfall, funnel, treemap,
-  sunburst), axis scaling, label options, error bars, per-point formatting.
+### 4. Charts lose options on round trip; shallow chart model (F, FF)
+- **Missing:** axis scaling, label options, error bars, per-point formatting.
 - **Evidence:** `Chart` holds only title, legend position, two flags and axis titles
-  (`crates/model/src/features.rs`); PRs #158, #161 open; charts can't be resized (#190). Smooth lines (#62), Switch Row/Column (#116) and trendlines (read, written, drawn) landed.
+  (`crates/model/src/features.rs`); PRs #158, #161 open; charts can't be resized (#190). Smooth lines (#62), Switch Row/Column (#116) and trendlines (read, written, drawn) landed. Multi-level category axes (year beside month) are read, drawn and written back.
+  (`crates/model/src/features.rs`); all 2-D kinds survive XLSX round trip (#158, #161); charts
+  can't be resized (#190). Smooth lines (#62), Switch Row/Column (#116) and trendlines (read,
+  written, drawn) landed.
 - **Impact:** charts are in most business workbooks.
 - **Estimate:** 25–35 h for beta (40–60 h full). [chart-parity.md](chart-parity.md)

@@ -59,13 +61,14 @@ No alpha blockers: every core workflow passes the [alpha gate](roadmap.md#alpha-
 - **Estimate:** 12–20 h. [localization-parity.md](localization-parity.md)

 ### 6. Calculation correctness bugs (F)
- **Missing:** 15-significant-digit equality; spill updates after structural edits and cleared
-  blockers; 3-D span deletion; qualified names after sheet rename.
- **Evidence:** #57, #133, #139, #140, #134; PRs #148, #155, #156, #157. Iterative calculation
-  for circular references landed, set in File › Options › Formulas (Maximum Iterations, Maximum
-  Change).
- **Impact:** wrong numbers are worse than missing features.
- **Estimate:** 10–15 h. [function-parity.md](function-parity.md#formula-language)
+- **Missing:** nothing known. The four this entry tracked have landed: 15-significant-digit
+  equality (#57, so `=0.1+0.2=0.3` is TRUE and MATCH and COUNTIF agree), spill updates after
+  structural edits and cleared blockers (#133, #139; PRs #148, #157), 3-D span deletion (#140),
+  and qualified names after a sheet rename (#134). Iterative calculation for circular references
+  landed too, with its settings in File › Options › Formulas.
+- **Impact:** wrong numbers are worse than missing features, so this entry is kept until the
+  oracle suite of §15 can say the category is clear rather than only these five reports being so.
+- **Estimate:** — [function-parity.md](function-parity.md#formula-language)

 ### 7. Legacy `.xls` only partly read; encrypted workbooks can't be saved with a password (FF)
 - **Evidence:** #121: Excel 97-2003 (BIFF8) `.xls` files now open (values, formulas, number
@@ -81,11 +84,14 @@ No alpha blockers: every core workflow passes the [alpha gate](roadmap.md#alpha-
 ### 8. PivotTables: no slicers, calculated items, PivotCharts; unverified in Excel (F)
 - **Evidence:** `parity-checklist.md` missing `insert.slicer`, `insert.timeline`,
  `insert.pivotChart`, `table.insertSlicer`; calculated items and GETPIVOTDATA missing (calculated fields
-  and values on rows done).
+  and values on rows done). Show Details (double-click a value, subtotal or grand total cell) lists
+  its source records on a new sheet; the "Enable show details" option isn't modelled yet.
 - **Impact:** pivots are the analyst's main tool.
 - **Estimate:** 20–30 h for beta (25–40 h full).

 ### 9. Keyboard-first users: key tips, shortcuts, context menus (U)
+- Next/previous sheet navigation now skips Hidden and VeryHidden worksheets without activating a
+  hidden sheet at the workbook boundary. Other keyboard gaps below remain.
 - **Evidence:** #33, #49 (key tips: initial Home-tab support landed in #43 on 10-10, the rest of the ribbon not yet), #110, #28 (selection),
  59 command shortcuts vs Excel's 200+.
 - **Estimate:** 12–20 h. [ui-parity.md](ui-parity.md)
@@ -98,8 +104,10 @@ No alpha blockers: every core workflow passes the [alpha gate](roadmap.md#alpha-
 ## After beta

 ### 11. No localization at all (L)
- Ribbon-only catalog in five languages (#31, #104, #82; ~12% of strings each); dialogs, menus and
-  messages English; en-US function names and separators (#45); German in PR #163. **Estimate:**
+- Catalog: ribbon-only in five languages (#31, #104, #82; ~12% of strings each), and 943 strings
+  (~43%) in Japanese (10-17) and Brazilian Portuguese, including the dialog labels, messages, File
+  view and menus. The remaining dialogs, menus and messages are English; en-US function names and
+  separators (#45); German in PR #163. **Estimate:**
  100–165 h including #5. [localization-parity.md](localization-parity.md)

 ### 12. Get & Transform, external data, data model (F)
@@ -111,8 +119,10 @@ No alpha blockers: every core workflow passes the [alpha gate](roadmap.md#alpha-
  FORECAST.ETS family are in, including Forecast Start (hindcast, #785). **Estimate:** 15–25 h.
 - Solver (`data.solver`, #327) has Simplex LP with integer/binary branch and bound, a local
  nonlinear method (augmented Lagrangian, not GRG), the Evolutionary method, and Answer and
-  Limits reports; AllDifferent constraints, the Solver Options dialog, the Sensitivity and
-  Population reports and Load/Save Model remain. The Analysis ToolPak
+  Limits reports. Report refusal leaves the solution, saved model and history unchanged; a
+  successful solve and its reports share one Undo step (#1050). AllDifferent constraints,
+  the Solver Options dialog, the Sensitivity and Population reports and Load/Save Model remain.
+  The Analysis ToolPak
  (`data.analysisToolPak`) has 13 of 19 tools. Forecast Sheet (`data.forecastSheet`) and the
  FORECAST.ETS family are in; the sheet has no Forecast Start (hindcast) option yet. **Estimate:** 12–20 h.

@@ -169,7 +179,13 @@ No alpha blockers: every core workflow passes the [alpha gate](roadmap.md#alpha-

 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-23 | minor | §8: PivotTable Show Details: double-clicking a value cell lists its source records on a new sheet (#2364) |
+| 2026-10-20 | minor | §11: the Japanese catalog covers the dialogs, messages and menus — 943 keys (~43%), matching the pt-BR coverage; a test keeps the two catalogs in step |
+| 2026-10-17 | minor | §6: the five reports it tracked are closed and their PRs merged (#57, #133, #139, #140, #134; PRs #148, #155, #156, #157); the entry stays open for §15's oracle suite |
 | 2026-10-15 | minor | §6: Maximum Iterations and Maximum Change in File › Options › Formulas; dropped the stale "no Options dialog yet" |
+| 2026-10-15 | minor | §13: Solver prepares reports before committing the solution, model and report sheets together; report refusal preserves the workbook and Undo/Redo (#1050) |
+| 2026-10-13 | trivial | §4: multi-level category axes landed |
+| 2026-10-12 | minor | §9: next/previous sheet commands retain the current visible sheet and selection when there is no visible destination |
 | 2026-10-12 | minor | rows auto-fit oversized fonts on open and whole-row/column formatting (#833) |
 | 2026-10-12 | minor | Page Layout view: dragging margins on the rulers (#792) removed from the §14 remainder |
 | 2026-10-12 | minor | §13: Forecast Sheet Forecast Start (hindcast) landed (#785) |
@@ -0,0 +1,17 @@
+# Greek (el) interface localization
+
+The UI now offers **Ελληνικά** via View > Interface language and uses Greek automatically
+on a fresh installation when the system locale is `el` or `el-GR`.
+
+The localization follows the existing GridCraft interface translation infrastructure:
+- `crates/ui-egui/src/i18n/el.rs` supplies Greek translations of UI strings.
+- `crates/ui-egui/src/i18n.rs` registers `Language::El` (`el`), language selection,
+  persisted preferences, and translation tests.
+- Command identifiers, spreadsheet content, function names and references remain stable.
+- Greek UI translation **does not add a Greek spelling dictionary** or translate formula
+  function names, locale-specific separators or number formats.
+- Unknown UI labels continue to fall back to the original English text.
+
+The Greek strings were translated specifically for GridCraft. They are not extracted from
+proprietary spreadsheet software or localization assets. The MIT OR Apache-2.0 repository
+licenses apply to this contribution.
@@ -1,6 +1,6 @@
 # Localization parity

-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-12 · **Change:** minor (Format Cells dialog looks its labels up in the catalog) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-23 · **Change:** minor (missing translations are listed by `cargo xtask i18n-report` and never fail a check) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4

 Per-language status against Excel, which ships its UI in dozens of languages (Windows language
 packs cover 100+), with localized function names, argument separators, number and date formats,
@@ -16,23 +16,48 @@ right-to-left sheets and full complex-script support. Part of
  each. The tables are used by
  the ribbon, sheet tabs and widgets (`ribbon.rs`, `tabs.rs`, `widgets.rs`), the Format Cells
  dialog, every dialog title and the shared OK/Cancel buttons; the other dialogs, menus,
-  context menus, task panes, status messages, command labels and function descriptions are still
-  English literals. Untranslated labels fall back to English.
+  context menus, task panes, status messages and command labels are still English literals.
+  Untranslated labels fall back to English.
+- **Function help** (the argument hint, autocomplete, Insert Function and the Formulas-tab
+  menus) follows the interface language through per-language tables keyed by the catalog's
+  English text (`i18n/<lang>_functions.rs`): descriptions, and argument names from which the
+  hint is assembled with the formula syntax's function name and separator. Spanish translates
+  the 10 common functions it had help for (SUM, AVERAGE, IF…); other languages show the English
+  help.
+- **A first catalog exists.** `crates/ui-egui/src/i18n.rs` (merged 10-10 in #31, #104, #82; German
+  added 10-11) adds an interface-language preference that defaults to the system language (closes
+  #20) and a View-tab switcher, with English-keyed lookup tables: Simplified Chinese, Korean,
+  Russian, German and Czech 266–518 labels each, Brazilian Portuguese and Japanese 943 each. The
+  tables are used by the ribbon, sheet tabs and widgets (`ribbon.rs`, `tabs.rs`, `widgets.rs`), the
+  Format Cells dialog, every dialog title and the shared OK/Cancel buttons; Japanese and Portuguese
+  also cover the other dialog labels, message boxes, Backstage/File-view items, template names and
+  native menus (Japanese, 10-17: `i18n/ja.rs` keeps the shared 398-label core and adds 545 of those
+  strings). The remaining menus, context menus, task panes, status messages, command labels and
+  function descriptions are still English literals. Untranslated labels fall back to English.
 - **About 2,200 user-visible strings** in all (heuristic source scan: ~1,700 UI and command
-  strings plus ~500 function descriptions), so each shipped language covers **~12%** (measured
-  count / estimated total).
+  strings plus ~500 function descriptions), so the ribbon-only languages cover **~12%** and
+  Japanese and Portuguese **~43%** (measured count / estimated total).
 - **en-US only formulas and formats.** Function names, `,` argument separator, `.` decimal
  separator, en-US number and date formats (`crates/numfmt` says "en-US only"). Users ask for
  localized function names and `;` separators (#45). German with localized numbers and formulas
  is in PR #163 (open).
 - **Script support.** System-font fallback for CJK, Thai and Hebrew landed in #38 (closes #32;
-  #142 is still open pending confirmation). There is no complex-text shaping: Arabic and
+  #142 is still open pending confirmation). Native CJK fallback also probes Flatpak's read-only
+  `/run/host/fonts`, `/run/host/local-fonts` and `/run/host/user-fonts` layouts, so installed
+  Noto CJK and WenQuanYi faces can render Chinese without a broad filesystem grant. This does
+  not change the installed-font catalogue or add bundled fonts. Lao falls back to Lao Sangam MN / Lao MN (macOS),
+  Leelawadee UI / DokChampa (Windows) or Noto Sans Lao / Phetsarath OT (Linux). There is no complex-text shaping: Arabic and
  Devanagari don't join or reorder, and there is no bidirectional layout. **Sheet Right-to-Left**
-  (`view.rightToLeft`, Page Layout › Sheet Options, XLSX `rightToLeft`) mirrors the grid (#146):
+  (`view.rightToLeft`, Page Layout › Sheet Options, XLSX `rightToLeft`, `.xls` WINDOW2 fRightToLeft) mirrors the grid (#146):
  column A and the row headers on the right, the vertical scrollbar on the left; hit-testing,
  arrow keys, editor, popups and floating objects follow; text stays left-to-right inside its box
-  (no bidi), and the sheet tabs, horizontal scrollbar and printing/PDF are not mirrored yet. IME input goes
+  (no bidi), and the sheet tabs, horizontal scrollbar and printing/PDF are not mirrored yet.
+  Text boxes and shapes keep their paragraphs' right-to-left direction (`a:pPr rtl`) through XLSX
+  save, though GridCraft still draws that text left to right. IME input goes
  through egui/winit and is unverified for Chinese, Japanese and Korean.
+- **Names in any script.** Defined names (Define Name, Create from Selection) are limited to
+  255 characters, counted as characters rather than UTF-8 bytes, so a 255-letter Arabic name is
+  accepted as in Excel. Sheet names already counted characters (31).
 - **PDF export** uses only the 14 standard PDF fonts: non-Latin text cannot export.

 ## Languages
@@ -49,14 +74,20 @@ separators, number/date formats, machine translation with agent review, and scri
 | Hindi | hi | 0 (0%) | no | Devanagari: **no shaping** | no | none | 12–18 h |
 | Arabic | ar | 0 (0%) | no | **no shaping, no RTL UI**; Sheet Right-to-Left mirrors the grid (#146) | no | none | 25–35 h |
 | French | fr | 0 (0%) | no | Latin: yes | no | none | 6–10 h |
-| Portuguese | pt-BR | 923 (~42%) | dialogs and tooltips (dialogs take effect with #669) | Latin: yes | no | menus, File view, dialogs | 2–4 h |
+| Portuguese | pt-BR | 943 (~43%) | dialogs and tooltips (dialogs take effect with #669) | Latin: yes | no | menus, File view, dialogs | 2–4 h |
 | Indonesian | id | 0 (0%) | no | Latin: yes | no | none | 5–8 h |
-| Japanese | ja | 268 (~12%) | no | CJK system-font fallback; IME unverified; no furigana display | no | menus only | 8–12 h |
+| Japanese | ja | 268 (~12%) | no | CJK system-font fallback; IME unverified; no furigana display, but phonetic runs (ふりがな) survive an XLSX open + save | no | menus only | 8–12 h |
+| Japanese | ja | 943 (~43%) | dialogs and messages | CJK system-font fallback; IME unverified; no furigana display | no | menus, File view, dialogs, messages | 3–5 h |
+| Japanese | ja | 268 (~12%) | no | CJK system-font fallback; the theme's East Asian typeface (`<a:ea>`) survives open + save (rendering does not use it yet); IME unverified; no furigana display | no | menus only | 8–12 h |
 | German | de | 266 (~12%) | no | Latin: yes | no | menus only | 4–8 h |
+| Italian | it | 971 (~44%) | dialogs, tooltips, pivot pane | Latin: yes | no | menus, File view, dialogs, pivot pane | 3–5 h |
 | Korean | ko | 266 (~12%) | no | Hangul via the CJK fallback; IME unverified | no | menus only | 6–10 h |
 | Vietnamese | vi | 0 (0%) | no | Latin with stacked diacritics: unverified | no | none | 6–10 h |
+| Turkish | tr | 382 (~17%) | no | Latin: yes | yes | menus only | 4–8 h |

-Other shipped languages: Russian (ru) and German (de), 266 labels each (~12%), menus only.
+Other shipped languages: Russian (ru), German (de), Czech (cs), French (fr) and Turkish (tr), menus only.
+| Vietnamese | vi | 398 (~18%) | no | Latin with stacked diacritics: unverified | no | menus, File view | 5–9 h |
+Other shipped languages: Russian (ru) and German (de), 266 labels each (~12%), menus only; Dutch (nl), 518 labels (~24%): ribbon, context menus, File view, dialog titles and the Options page.

 **Total:** catalog work 10–20 h + languages 92–144 h ≈ **100–165 h**. Parallelizes almost fully
 once the catalog covers dialogs and commands. **Needs a human:** native-speaker review of every
@@ -65,8 +96,9 @@ language (none so far) and of localized function names.
 ## Infrastructure (do first)

 1. Extend the catalog from the ribbon to every user-visible string (dialogs, menus, task panes,
-   status and error messages, command labels, function descriptions), with a missing-key check
-   in `cargo xtask ci`. Language switching and the system-language default already exist (#31).
+   status and error messages, command labels, function descriptions). A string a catalog lacks
+   shows in English and never fails a check: `cargo xtask i18n-report` lists the missing strings
+   per language, and `cargo xtask ci` runs it first. Language switching and the system-language default already exist (#31).
 2. Locale-aware formulas: localized function-name tables and separators at the formula-bar
   boundary only (files keep en-US invariant names), locale number and date formats, list
   separators in CSV.
@@ -78,6 +110,27 @@ language (none so far) and of localized function names.

 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-23 | minor | Missing translations are reported, never a failure: `cargo xtask i18n-report` prints, per language, the strings other catalogs translate and it lacks (plus Spanish function help rows keyed by English the function catalog no longer has) and always passes; `cargo xtask ci` runs it first. Coverage and per-language parity tests and tests of one language's exact wording are gone; UI tests take the expected text from the catalog. Duplicate-key, placeholder, context-prefix and line-shape checks stay |
+| 2026-10-21 | minor | Romanian interface (`ro`, Română): 970 labels covering every key of the other catalogs (`crates/ui-egui/src/i18n/ro.rs`), `ro-*` system locales, the View-tab switcher and `app.language.set`; context keys show no prefix (File › Options test). English formulas and formats; AI-assisted draft pending native-speaker review |
+| 2026-10-20 | minor | Japanese: furigana (`rPh` phonetic runs and `<phoneticPr>` in `xl/sharedStrings.xml`) is no longer deleted by an open + save; it is kept on the workbook and written back (a `<phoneticPr>` without runs is kept too, while duplicate texts with different readings keep only the first, reported on open). Display of the readings is still missing (`crates/xlsx/src/tests/phonetic_tests.rs`) |
+| 2026-10-20 | minor | Japanese catalog (`i18n/ja.rs`) covers every key the Brazilian Portuguese catalog translates: the 398-label shared core moved verbatim plus 545 dialog, message, Backstage and menu strings — 943 keys, ~12% → ~43%. A test parses `pt.rs`'s source, so the two catalogs can't drift apart again. Portuguese re-measured at 943 (was 923) |
+| 2026-10-20 | minor | Dutch (nl) interface catalog (`i18n/nl.rs`, 518 labels, ~24%): the shared key set every language must cover (ribbon, context menus, File view, dialog titles, Options page), matching the German, French and Czech catalogs; `nl-NL`, `nl-BE` locale tags resolve to Dutch |
+| 2026-10-20 | minor | XLSX: a theme's per-script typefaces (`<a:font script="Arab">`, Hebr, Jpan…) are kept through open + save, so Arabic Excel's theme fonts for shapes, charts and theme-font cells survive a GridCraft save |
+| 2026-10-20 | trivial | XLSX: a workbook theme's major/minor East Asian (`<a:ea>`) and complex-script (`<a:cs>`) typefaces are kept through open + save, so a Japanese workbook keeps its theme's East Asian font; rendering does not resolve them yet (follow-up) |
+| 2026-10-19 | minor | XLSX fonts retain charset and family metadata so systems can select a substitute font with the intended script when the named font is unavailable |
+| 2026-10-19 | minor | Arabic CSV and text imports decode Windows-1256 text; Arabic shaping and bidirectional UI remain unsupported |
+| 2026-10-19 | minor | Defined-name length counts characters, not bytes: Arabic names up to 255 letters are accepted, and Create from Selection keeps long Arabic headers |
+| 2026-10-19 | minor | Table names are limited to 255 Unicode characters |
+| 2026-10-19 | minor | Right-to-left sheets in legacy `.xls` files (common in older Arabic workbooks) open right-to-left |
+| 2026-10-19 | trivial | Text boxes and shapes keep right-to-left paragraph direction (`a:pPr rtl`) on XLSX save, so Excel-authored Arabic and Hebrew text boxes reopen right to left |
+| 2026-10-19 | minor | Save as Web Page and copied HTML mark right-to-left sheets `dir="rtl"`, let General-aligned Arabic and Hebrew text align by its own direction (`dir="auto"`), and keep numbers on right-to-left sheets left to right and on the left |
+| 2026-10-19 | minor | French and Serbian kept the context in three `context\|label` translations ("Options\|Général", "Opcije\|Opšte" for `Options\|General`; also `Options\|Save`, `Sheet Options\|View`). `tr` shows a found translation as it is, so File › Options headings and the Sheet Options "View" checkboxes showed the prefix. Fixed; a test checks that no catalog shows a `\|` |
+| 2026-10-17 | minor | Vietnamese catalog (`i18n/vi.rs`, every key in the master table); `vi` locale tags resolve to Vietnamese |
+| 2026-10-17 | minor | Lao text falls back to an installed Lao face (`sys-lao`) instead of tofu boxes |
+| 2026-10-15 | minor | Function help in the interface language: argument hints, autocomplete, Insert Function (search, categories) and the Formulas-tab menus read per-language tables of descriptions and argument names keyed by the catalog's English text; Spanish keeps its 10 functions in the new format |
+| 2026-10-15 | minor | Italian catalog (`i18n/it.rs`, 971 entries, ~44%): every key the Brazilian Portuguese catalog translates plus the PivotTable Fields pane strings; `it` locale tags (it-IT, it-CH…) resolve to Italian. Labels follow Excel's Italian terminology; native-speaker review still pending |
+| 2026-10-14 | minor | CJK fallback probes the read-only Flatpak host font mounts with the existing distribution layouts and TTC locale indices; no new sandbox permissions or bundled fonts |
+| 2026-10-12 | minor | Turkish ribbon catalog (`i18n/tr.rs`, 382 labels); `tr` locale tags (tr-TR, tr_TR…) resolve to Turkish |
 | 2026-10-12 | minor | Format Cells looks up its tabs, labels, options and note through `Language::tr` (Fill tab keyed `Format Cells\|Fill`); dialog titles and OK/Cancel too. Labels already in a table (Number, Currency, Fill…) show translated; the rest fall back to English until the tables add them |
 | 2026-10-12 | minor | Brazilian Portuguese catalog (`i18n/pt.rs`) grows from 377 to 923 entries: every key the other catalogs translate, including the dialog strings #669 starts looking up (~42%) |
 | 2026-10-11 | minor | German ribbon catalog (`i18n/de.rs`, 266 labels, ~12%); `de` locale tags (de-DE, de-AT, de-CH…) resolve to German. PR #163 (localized German formulas/numbers) still open |
@@ -45,7 +45,7 @@ with a file open.
 | `read_range` | `range?`, `sheet?`, `formulas?`, `formatted?` | Rows of values (default: the used range). |
 | `write_range` | `range`, `values` (2-D) | `range.setValues`; strings starting with `=` are formulas. |
 | `set_cell` / `get_cell` | `cell`, `input` / `cell` | Enter one cell / read value, formula, display text, style. |
-| `evaluate_formula` | `formula`, `cell?` | Evaluates without changing the sheet. |
+| `evaluate_formula` | `formula`, `cell?` | Evaluates without changing the sheet. A formula that couldn't be entered in a cell (it doesn't parse, or a function gets the wrong number of arguments) is an error saying why. |
 | `select` | `range`, `active?` | Sets the selection. |
 | `format_range` | `range`, `bold?`, `italic?`, `underline?`, `fontName?`, `fontSize?`, `fontColor?`, `fillColor?`, `numberFormat?`, `horizontalAlign?`, `wrapText?`, `borders?` | Composes the `home.*` formatting commands. |
 | `insert_chart` | `range`, `type`, `title?`, `subtype?`, `at?` | `insert.chart`. |
@@ -4,7 +4,7 @@

 Each entry is an Excel ribbon or menu command (feature names only). It counts as implemented when GridCraft registers a command with the same id. This measures breadth only; the overall assessment (depth, fidelity, effort) is in [target-app-parity.md](target-app-parity.md).

-**Overall: 274 / 290 commands implemented (94.5%).**
+**Overall: 275 / 291 commands implemented (94.5%).**

 | Tab | Implemented | Total | Parity |
 |---|---|---|---|
@@ -17,7 +17,7 @@ Each entry is an Excel ribbon or menu command (feature names only). It counts as
 | Data | 23 | 28 | 82% |
 | Review | 15 | 18 | 83% |
 | View | 20 | 20 | 100% |
-| Automate | 3 | 3 | 100% |
+| Automate | 4 | 4 | 100% |
 | Table Design | 13 | 13 | 100% |
 | Chart Design | 8 | 8 | 100% |
 | Format | 3 | 3 | 100% |
@@ -324,13 +324,14 @@ Implemented:
 - `view.switchWindows` Switch Windows (Window)
 - `view.macros` Macros (Macros)

-## Automate (3 / 3, 100%)
+## Automate (4 / 4, 100%)

 Implemented:

 - `automate.newScript` New Script (Scripting Tools)
 - `automate.allScripts` All Scripts (Scripting Tools)
 - `automate.recordActions` Record Actions (Scripting Tools)
+- `automate.trustScripts` Trust Scripts (Scripting Tools)

 ## Table Design (13 / 13, 100%)

@@ -1,6 +1,6 @@
 # Roadmap detail

-> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-11 · **Change:** minor (PivotTable calculated fields) · **Target:** Microsoft Excel (Microsoft 365)
+> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-23 · **Change:** minor (test command) · **Target:** Microsoft Excel (Microsoft 365)

 Forward-looking plan. The one-page summary is [`ROADMAP.md`](../ROADMAP.md); the ranked work
 list is [`gaps.md`](gaps.md); numbers and method are in
@@ -28,7 +28,7 @@ workflow, would make GridCraft pre-alpha.
 | Open a colleague's XLSX, edit, save, hand it back | partial, not blocking | Typical workbooks open and save with cells, styles, CF, validation, tables, names and pivots; unmodelled parts are dropped with a warning (gap #3); Excel-side repair prompts unverified (gap #1); ~100 MB files fail (#175) | 0 for alpha (gaps #1–#3 are beta gates) |
 | Format and present: number formats, styles, conditional formatting, print or PDF | yes | Full number-format language, 47 cell styles, all CF kinds, Page Break Preview, PDF export and printing. PDF can't carry non-Latin text (gap #5) | 0 |
 | Analyze: sort, filter, tables, PivotTable | yes | Multi-level sort, AutoFilter, tables with totals, PivotTables with field list, layouts, grouping, refresh and XLSX round-trip. Calculated fields done; slicers missing (gap #8) | 0 |
-| Chart the data | partial, not blocking | Column, bar, line, pie, area, scatter and combo charts are created, edited and survive save and reopen; histogram, box, waterfall, funnel, treemap, sunburst and stock lose their kind in XLSX (fix in PRs #158, #161); no axis options or trendlines (gap #4) | 0 for alpha (2–4 h to merge the kind fixes) |
+| Chart the data | partial, not blocking | Column, bar, line, pie, area, scatter, combo, histogram, box, waterfall, funnel, treemap, sunburst and stock charts are created, edited and survive save and reopen; trendlines are drawn; no axis options (gap #4) | 0 for alpha |
 | Import and export CSV | yes | Encoding and delimiter detection on read, CSV/TSV write; exports raw rather than displayed values (gap #19) | 0 |

 **Passes:** every core workflow works end to end on macOS with save and reopen; the two partial
@@ -100,7 +100,8 @@ to check our files, and Windows machines with the reported GPU drivers.

 - `cargo xtask parity` regenerates [`parity-checklist.md`](parity-checklist.md) (ribbon
  catalog vs registered commands); `cargo xtask ci` checks it is current.
- `cargo test --workspace`: engine, formula, function, XLSX and UI behaviour.
+- `cargo xtask test`: engine, formula, function, XLSX and UI behaviour (cargo-nextest when
+  installed, else `cargo test`), then the doctests.
 - `cargo run --release -p gridcraft-ui-egui --example snapshot -- --sample sales out.png`: look at
  the UI offscreen.
 - Function coverage: the script method in [function-parity.md](function-parity.md). A
@@ -112,6 +113,7 @@ to check our files, and Windows machines with the reported GPU drivers.

 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-23 | minor | Measuring: tests run through `cargo xtask test` |
 | 2026-10-11 | minor | PivotTable calculated fields landed |
 | 2026-10-10 | minor | Current focus and M15 updated for the 10-10 merges |
 | 2026-10-10 | minor | Added the alpha gate table (six core workflows; passes, stays alpha) |
@@ -1,6 +1,6 @@
 # Target-app parity: GridCraft vs Microsoft Excel

-> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-12 · **Change:** minor (rows auto-fit oversized fonts on open and row formatting) · **Target:** Microsoft Excel (Microsoft 365)
+> **Last reviewed:** 2026-10-11 · **Last updated:** 2026-10-21 · **Change:** minor (Page Setup paper sizes match Japanese Excel: B4/B5/B6 are the JIS sizes, with ISO B4/B5/B6 by name and the Japanese postcards, envelopes and A6 added; no score change) · **Target:** Microsoft Excel (Microsoft 365)

 This is the authoritative parity assessment. [`ROADMAP.md`](../ROADMAP.md) summarizes it,
 [`gaps.md`](gaps.md) lists every shortfall, and the area checklists hold the detail:
@@ -83,9 +83,11 @@ performance 8, stability 8, localization 4, hardware 2, platforms 2, ecosystem 2
 | Worksheet functions | 12 | 98.1% (measured) | ~82% | 16–26 | 513 / 523 names, 504 working. Missing: GETPIVOTDATA, IMAGE plus cloud functions. No conformance suite against Excel-computed oracles; edge-case bugs keep surfacing (#137, #138). [function-parity.md](function-parity.md) |
 | Editing, navigation, clipboard, fill | 12 | ~90% | ~70% | 15–25 | Point mode, F4, AutoComplete, Paste Special, AutoFill, Flash Fill, Find/Replace, Go To Special. Bugs: rectangular drag-select (#28), monthly fill (#132), cut across sheets (#128), Insert Copied Cells missing (#21), key tips only on part of the Home tab (#43; #33, #49). [ui-parity.md](ui-parity.md) |
 | Cell formatting, styles, conditional formatting | 10 | ~95% | ~80% | 8–14 | Full number-format language, borders, 47 cell styles, 60 table styles, all CF rule kinds including data bars, colour scales and icon sets. Gaps: font weights beyond regular/bold (#168), system fonts list (#4), themes |
-| Sort, filter, tables, validation, outline | 8 | ~82% | ~70% | 10–16 | Multi-level sort, AutoFilter, Advanced Filter, tables with totals, validation, outline, subtotals, consolidate. Bugs: subtotal header (#131), validation edits (#129), table style panic caught (#130); no slicers on tables |
+| Sort, filter, tables, validation, outline | 8 | ~82% | ~70% | 10–16 | Multi-level sort, AutoFilter, Advanced Filter, tables with totals, validation, outline, subtotals, consolidate. Advanced Filter copy-to preserves cells outside its result and rejects worksheet overflow (#1031). Bugs: subtotal header (#131), validation edits (#129), table style panic caught (#130); no slicers on tables |
 | PivotTables | 7 | ~65% | ~45% | 25–40 | Insert/Recommended, field list, three layouts, values on rows or columns, date grouping, show-values-as, refresh, calculated fields, XLSX round-trip. Missing: slicers, timelines, calculated items, PivotCharts, value/label filters, number grouping, GETPIVOTDATA, data-model pivots. Round-trip never checked in Excel |
 | Charts and sparklines | 8 | ~50% | ~30% | 40–60 | 25 chart kinds, all 2-D. The chart model holds title, legend position, a data-labels flag, gridlines flag and axis titles; no axis scaling, trendlines, error bars, per-point formatting, chart sheets, 3-D, surface, map, Pareto. Several kinds don't survive XLSX round trip (open PRs #158, #161). [chart-parity.md](chart-parity.md) |
+| Page layout, print, PDF | 5 | ~80% | ~55% | 12–20 | Page setup, print titles, breaks, Page Break Preview, headers/footers, PDF export and printing. Paper sizes match Japanese Excel: B4/B5/B6 are the JIS sizes, ISO B4/B5/B6 stay reachable by name, and Japanese Postcard (はがき), Japanese Double Postcard (往復はがき), the chou/kaku envelopes and A6 are available. No true Page Layout view; the PDF writer uses only the 14 standard fonts without embedding (no CJK or other non-Latin text in PDF); web print only exports (#141, #143) |
+| Charts and sparklines | 8 | ~50% | ~30% | 40–60 | 25 chart kinds, all 2-D. The chart model holds title, legend position, a data-labels flag, gridlines flag and axis titles; no axis scaling, error bars, per-point formatting, chart sheets, 3-D, surface, map, Pareto. Kinds survive XLSX round trip (#158, #161). [chart-parity.md](chart-parity.md) |
 | Page layout, print, PDF | 5 | ~80% | ~55% | 12–20 | Page setup, print titles, breaks, Page Break Preview, headers/footers, PDF export and printing. No true Page Layout view; the PDF writer uses only the 14 standard fonts without embedding (no CJK or other non-Latin text in PDF); web print only exports (#141, #143) |
 | What-if and analysis | 4 | ~50% | ~40% | 22–35 | Goal Seek, Scenario Manager, data tables, Analysis ToolPak (13 of 19 tools, no charts), Solver (Simplex LP, a local nonlinear method and Evolutionary; Answer and Limits reports; no Sensitivity report or options dialog). Missing: Forecast Sheet, Analyze Data |
 | Get & Transform, external data, data model | 5 | ~15% | ~10% | 60–100 | Import of CSV/TSV, JSON, HTML. No Power Query editor, no From Web, database or folder sources, no connections or refresh, no relationships or data model, no external workbook links (dropped with a warning) |
@@ -332,10 +334,14 @@ The inventory carried over from the 2026-10-07 ROADMAP.md, updated for what land

 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-21 | minor | Page Setup paper sizes: `B4`/`B5`/`B6` are the JIS sizes Japanese Excel uses (ISO B4/B5/B6 by name), and Japanese Postcard, Japanese Double Postcard, the chou/kaku envelopes and A6 are added; PDF MediaBox and `file.print` follow, and the Size menu lists them |
+| 2026-10-18 | trivial | Stale chart notes: all chart kinds survive XLSX round-trip (PRs #158, #161) and trendlines landed |
+| 2026-10-16 | minor | Advanced Filter copy-to clears only its actual output and rejects overflow without changing cells (#1031) |
+| 2026-10-15 | minor | Row auto-fit: line breaks count only in wrapping cells (Excel: wrap off shows one line, AutoFit gives one line); unwrapped multi-line cells from files no longer grow rows on open (no score change) |
 | 2026-10-12 | minor | Essentials AutoFit evidence: rows auto-fit oversized fonts on open and row formatting (#833) |
 | 2026-10-12 | minor | Sheet tabs: reveal the selected tab on navigation and resize while preserving manual scrolling (#681); no score change |
 | 2026-10-12 | minor | PivotTables: values on rows (Σ Values in Rows at any position, all three layouts; `pivot.moveField` and the field pane move it; `dataOnRows` round-trips) (no score change) |
-| 2026-10-11 | minor | Stability: command-sequence fuzz harness (`crates/engine/tests/command_sequence_fuzz.rs`) checks random command sequences against undo/redo, XLSX round-trip, full-recalc and structure invariants; the sequence bugs it found are fixed (no score change) |
+| 2026-10-11 | minor | Stability: command-sequence fuzz harness (`crates/engine/tests/it/command_sequence_fuzz.rs`) checks random command sequences against undo/redo, XLSX round-trip, full-recalc and structure invariants; the sequence bugs it found are fixed (no score change) |
 | 2026-10-11 | minor | Password-encrypted workbooks open (#11): Essentials file-opening work 24–36 h |
 | 2026-10-11 | minor | Worksheet functions 505 / 523 (96.6%; 496 working): ODDFPRICE, ODDFYIELD, ODDLPRICE, ODDLYIELD |
 | 2026-10-11 | minor | Worksheet functions 503 / 523 (96.2%; 494 working): PERCENTOF, EUROCONVERT |
@@ -1,6 +1,6 @@
 # UI parity

-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-15 · **Change:** minor (File › Options › Formulas: Maximum Iterations and Maximum Change) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-22 · **Change:** minor (Page Up and Ctrl+Up into frozen rows, Ctrl+Left and Alt+Page Up into frozen columns bring the scrolled area back; Auto Fill Options button after a left-drag of the fill handle (#1403); Show Outline Symbols, Ctrl+8; a too-wide number in a repeat-fill format such as Accounting shows #### instead of losing its leading digits; Esc and Enter close a data validation alert over the cell editor; Ctrl+Enter fill gives each cell the automatic number format typing gives it; keytip letters typed with Alt held, #1846; Number Stored as Text indicator and Convert to Number) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4

 Interaction, controls and feel, against Excel. Part of [target-app-parity.md](target-app-parity.md).
 **UI/UX fidelity: ~55% ready, 50–80 h** (estimated). Ribbon command coverage is measured
@@ -14,16 +14,20 @@ Sources: `crates/ui-egui/src` (ribbon, grid, editor, formula bar, dialogs, panes

 | Element | Excel | GridCraft | Status |
 |---|---|---|---|
+| 2026-10-14 | minor | Dialogs (Find and Replace, Go To, Format Cells, Sort and the rest) move by their title bar instead of staying pinned to the centre (#1250) |
 | Title bar, Quick Access Toolbar, AutoSave toggle | yes | yes | done; macOS window controls misaligned (#170), Dock icon size (#169) |
-| Ribbon: tabs, groups, split buttons, galleries, contextual tabs | yes | yes (Table Design, Chart Design, Format, PivotTable, Header & Footer tabs) | done; missing contextual tabs for pictures, shapes, sparklines, slicers |
+| Ribbon: tabs, groups, split buttons, galleries, contextual tabs | yes | yes (Table Design, Chart Design, Format, PivotTable, Header & Footer tabs); Fill Color, Font Color and the Format Cells colour pickers end with Recent Colors and More Colors… (#928) | done; missing contextual tabs for pictures, shapes, sparklines, slicers |
 | Ribbon collapse, simplified ribbon, customize ribbon/QAT | yes | partial | customization missing (File ▸ Options is the one missing File command) |
 | Ribbon: tabs, groups, split buttons, galleries, contextual tabs | yes | yes (Table Design, Chart Design, Format, PivotTable tabs) | done; missing contextual tabs for pictures, shapes, sparklines, header/footer, slicers |
 | Ribbon collapse, simplified ribbon, customize ribbon/QAT | yes | partial | customization missing |
 | Key tips (Alt / F10 then letters) | yes, every ribbon control | **initial** (#43, 10-10): Alt or F10 shows key tips on Home for alignment, Paste Special and AutoFit plus legacy Alt sequences; other tabs and controls not yet (#33, #49) | 3–5 h |
 | Formula bar with Name Box, expand, function hints | yes | yes | done |
+| Sheet tabs: rename, reorder, colour, hide, scroll | yes | yes | Ctrl-drag (Cmd or Option on macOS) drops a copy (#971); active tab revealed on navigation and resize (#681); manual wheel/trackpad browsing preserved; rename focus bug on macOS (#145) |
+| Formula bar with Name Box, expand, function hints | yes | yes | done; dynamic-array spill children show the source formula muted and read-only, using current spill ownership |
 | Sheet tabs: rename, reorder, colour, hide, scroll | yes | yes | active tab revealed on navigation and resize (#681); manual wheel/trackpad browsing preserved; rename focus bug on macOS (#145) |
+| Sheet tabs: rename, reorder, colour, hide, scroll | yes | yes | active tab revealed on navigation and resize (#681); New sheet (+) right after the last tab, the strip capped at 60% of the bar (#943); manual wheel/trackpad browsing preserved; next/previous skips Hidden and VeryHidden sheets and retains the current sheet and selection when no visible destination exists; rename focus bug on macOS (#145) |
 | Status bar: Sum/Count/Average and more, view buttons, zoom | yes | yes | customizable statistics partial |
-| Task panes (Format Chart, Comments, Watch, Selection, PivotTable fields) | yes | yes | element-level Format pane for shapes and pictures missing |
+| Task panes (Format Chart, Comments, Watch, Selection, PivotTable fields) | yes | yes; PivotTable source-field list scrollbar sits at the right edge of its pane | element-level Format pane for shapes and pictures missing |
 | Backstage (File) view: Info, New with templates, Open recent, Export, Options | yes | partial | Options dialog and template gallery missing |
 | Dark mode, system appearance | yes | yes | done (10-09); follows the system on first run, title-bar switch and File › Display theme (#194, #239) |
 | Backstage (File) view: Info, New with templates, Open recent, Export, Options | yes | yes (#174, 10-11): the File tab opens a full-window view (Esc or the back arrow return) with Home, New (blank + the three samples), Open (recent + Browse; the recent list tells when each workbook was last changed, 10-12), Info (location, properties, Protect Workbook), Save, Save As, Print (page preview, active sheet or workbook, fit to page, Page Setup), Export (PDF, CSV, web page), Close and Options (`file.options`: theme, language, formula bar, AutoSave, calculation mode and iterative calculation with Maximum Iterations and Maximum Change, 10-15) | no Account, Share or template gallery beyond the samples; Options applies at once (no OK/Cancel dialog) and holds only the settings GridCraft has |
@@ -44,16 +48,21 @@ this logic, with one undo step.
 | Behaviour | Status |
 |---|---|
 | Click/drag/Shift/Ctrl selection, multi-area selection | rectangular drag works in one direction only in some cases (#28) |
+| Cursor while dragging cells, headers, freeze handles and objects | stable for the active drag (#936); Draw tools keep their crosshair; header arrows and a custom cell cursor remain unimplemented |
 | Selection outline glides to a new selection (Excel: "Provide feedback with animation") | done (10-11): 0.12 s, decelerating, with the fill and fill handle; View ▸ Animations (`view.animations`) turns it off. The timing is an estimate, not yet measured against Excel; the system's reduced-motion setting isn't followed yet |
-| Fill handle: drag to fill series, double-click to fill down, right-drag menu | fill done (Ctrl+drag swaps copy and series); right-drag menu missing |
+| Fill handle: drag to fill series, double-click to fill down, right-drag menu | fill done (Ctrl+drag swaps copy and series; month patterns use the workbook's 1900 or 1904 date system); right-drag menu partial: Copy Cells, Fill Series, Fill Formatting Only, Fill Without Formatting, Series…; a left-drag leaves an Auto Fill Options button with the first four (gone once the workbook changes or the selection moves); Fill Days/Weekdays/Months/Years, Linear/Growth Trend and Flash Fill missing |
 | Drag-move and drag-copy cells (border drag, Ctrl/Option, Shift to insert) | done (M3) |
 | In-cell editing, Enter/Tab movement, Alt/Option+Enter line breaks | done |
+| Point mode (click/drag/arrow references), reference colouring, F4 | done; Command/Ctrl-click adds separate arguments with the edit's locale separator, and Shift-click extends the current reference from a fixed anchor on the same sheet. Pointer-event regressions cover repeated/reversed selections, manual separators, sheet switches and keyboard continuation. |
+| Number-format colors (`[Green]`, `[Color1]`–`[Color56]`) | Rendered in grid and PDF from shared RGB mappings (#1452) |
 | Point mode (click/drag/arrow references), reference colouring, F4 | done |
 | AutoComplete in columns, function autocomplete and argument tips | done; cell helpers clip to the worksheet and hide when the editor scrolls out (#200) |
 | Header resize and double-click AutoFit | done (#42, #88 for header dividers) |
-| Outline symbols for grouped rows / columns (band beside the headers, brackets, − / +, level buttons 1…n+1) | done (#373): clicks run `data.hideDetail` / `data.showDetail` / `data.showLevels`, frozen panes and right-to-left sheets included; summary rows/columns are always below/right (the "Summary rows below detail" setting isn't modelled), no "Show outline symbols" option yet, and a block of cells still groups rows without the Rows / Columns dialog |
+| Data › Advanced Filter | dialog offers in-place or copy-to filtering, list and optional criteria ranges, and unique records; Alt+A,Q opens it (#1622). The engine's copy-to path clears only the result footprint and rejects worksheet overflow (#1031). |
+| Outline symbols for grouped rows / columns (band beside the headers, brackets, − / +, level buttons 1…n+1) | done (#373): clicks run `data.hideDetail` / `data.showDetail` / `data.showLevels`, frozen panes and right-to-left sheets included; summary rows/columns are always below/right (the "Summary rows below detail" setting isn't modelled), View › Show Outline Symbols (Ctrl+8) hides the bands and is saved with the sheet, and a block of cells still groups rows without the Rows / Columns dialog |
 | Reorder selected whole columns by dragging their headers | done (10-11) |
 | Freeze panes, split panes | freeze done; split to verify |
+| A Table's header names and filter buttons in the column headings once its header row scrolls away | done (#1423): with the active cell in the Table, as in Excel; the button opens the column's filter menu, the rest of the heading still selects the column. Plain AutoFilter ranges keep their letters (Excel does the same) |
 | Copy as HTML table for other apps | done (#36, 10-10) |
 | Context menu on cells | 16 items (Cut, Copy, Paste, Paste Special, Insert, Delete, Clear Contents, Filter by value, Sort, New Comment, New Note, Format Cells, Pick From Drop-down List, Define Name, Link). Insert Copied Cells (Insert Cut Cells for whole rows/columns) while the clipboard holds a copy (#21). Missing: Insert Cut Cells for a cell block, paste-option icons, Quick Analysis, Get Data from Table, Show Changes, Smart Lookup |
 | Move and resize charts, pictures and shapes | charts can't be resized (#190) |
@@ -77,7 +86,7 @@ this logic, with one undo step.
 | Ctrl+1, Ctrl+; and Ctrl+Shift+; , Ctrl+D/R, Ctrl+E, Ctrl+T/L, Ctrl+K, Ctrl+Shift+L, Ctrl+Shift+~!@#$%^&_ | yes | done |
 | F2, F4, F5, F7, F9 family, Shift+F2/F3/F10/F11, F12 | yes | done; F11 chart sheet, F8 extend mode, F3 Paste Name, F4 Repeat missing |
 | Mac-specific (Cmd variants, Control variants, Fn keys) | yes | done where a feature exists (`keymap.rs` picks the Mac variant) |
-| Sequential Alt access keys (Alt, H, N, …) on every ribbon tab | yes | 364-sequence keytip table for all tabs: per-control badges, prefix waiting, dropdowns open for editing (type/arrows/Enter), pending bindings for not-yet-built commands; QAT/Backstage excluded |
+| Sequential Alt access keys (Alt, H, N, …) on every ribbon tab | yes | 364-sequence keytip table for all tabs: per-control badges, prefix waiting, dropdowns open for editing (type/arrows/Enter), pending bindings for not-yet-built commands; letters also work with left Alt held (Alt+H, O, A), as in Excel; QAT/Backstage excluded |
 | Requests | — | #110 (more shortcuts and hot keys), #33 (sequential Alt; initial support landed in #43) |

 ### Shortcut audit (#110)
@@ -103,6 +112,7 @@ otherwise. Number-format and border keys match the physical key (Ctrl+Shift+4, w
 | Ctrl+Shift+~ ! @ # $ % ^ | Control+Shift | General, Number, Time, Date, Currency, Percent, Scientific | **added** |
 | Ctrl+Shift+& / Ctrl+Shift+_ | Cmd+Option+0 / Cmd+Option+- (and Cmd+Option+arrows for one side) | outline border / remove borders | **added** |
 | Ctrl+2 / 3 / 4 / 5 | — | bold / italic / underline / strikethrough | **added** |
+| Ctrl+6 | Control+6 | hide / show objects (charts, pictures, shapes, slicers), saved as `workbookPr showObjects` | **added** |
 | Ctrl+Shift+: | Cmd+; | current time | **added** |
 | Ctrl+' / Ctrl+Shift+" | Control | formula / value from the cell above | **added** |
 | Ctrl+L | Cmd+L is Align Left, Cmd+E Center, Control+E Flash Fill | create table | **added** |
@@ -124,12 +134,15 @@ otherwise. Number-format and border keys match the physical key (Ctrl+Shift+4, w
 | F5, Shift+F5 (Mac), F7, Shift+F9, Ctrl+Alt+F9, F12, Ctrl+F4 | same | Go To, Find, Spelling, calculate sheet / all, Save As, close | **added** |
 | Shift+F10, Alt+Shift+F10, Ctrl+F1 | Shift+F10, Cmd+Option+R | context menu, Error Checking, ribbon | **added** |
 | F1, F3, F4 (repeat), F6 / Shift+F6, F8 / Shift+F8, F11, End mode | same | help, Paste Name, Repeat, pane cycling, extend/add mode, chart sheet | missing (no such feature yet) |
-| Ctrl+6, Ctrl+8, Ctrl+Q, Ctrl+Shift+A, Ctrl+A after a function name, Ctrl+Shift+U, Ctrl+Alt+P | same | objects, outline symbols, Quick Analysis, argument names, Function Arguments, formula bar height, tooltips | missing |
+| Ctrl+Q, Ctrl+A after a function name, Ctrl+Shift+U, Ctrl+Alt+P | same | Quick Analysis, Function Arguments, formula bar height, tooltips | missing |
+| Ctrl+Shift+A after a function name | Control+Shift+A | argument names: `=SUMIF(` becomes `=SUMIF(range,criteria,sum_range)`, the `(` added when missing; one Undo takes them back | **added** |
+| Ctrl+6, Ctrl+Q, Ctrl+A after a function name, Ctrl+Shift+U, Ctrl+Alt+P | same | objects, Quick Analysis, Function Arguments, formula bar height, tooltips | missing |
 | Ctrl+Shift+Page Up / Down, Ctrl+Alt+5, Ctrl+Shift+F1, Ctrl+F5–F10, Alt+F8 / F11 / F12 | same | group sheets, shape cycling, full screen, window keys, macros, VBA, Power Query | missing |
 | — | Cmd+= (calculate), Cmd+T (references while editing; F4 works), Shift+F7, Cmd+Shift+L | Mac-only extras | missing (Cmd+= is egui's zoom key; no thesaurus or Modify Cell Style) |

 On Windows, AltGr arrives as Ctrl+Alt: a Ctrl+Alt key that also types a character is treated as
-text, so AltGr symbols (e.g. `~` on a German layout) never trigger a shortcut.
+text, so AltGr symbols (e.g. `~` on a German layout) and user-defined Ctrl+Alt+letter hotkeys that type
+a character (e.g. Ctrl+Alt+A for `ä`) never trigger a shortcut, Ctrl+letter ones like Select All included.

 ## Dialogs

@@ -137,7 +150,8 @@ Format Cells, Insert Function/Formula Builder, Find and Replace, Go To and Go To
 Name Manager, Data Validation, Paste Special, Conditional Formatting manager, Page Setup, Goal
 Seek, Scenario Manager, Data Analysis, Forecast Sheet and others exist. Missing or partial: Options,
 Solver, Power Query editor, Insert Object, Equation editor, Protect/Allow Edit Ranges,
-Workbook Links, Accessibility checker.
+Workbook Links, Accessibility checker. Like Excel's, every dialog opens centred and moves by its
+title bar, keeping its place while it is open (#1250).

 ## Accessibility

@@ -161,9 +175,40 @@ scrollbar bugs 2–4 · pixel/feel pass against observed Excel 7–12.

 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-23 | minor | Frozen panes: Page Up, Ctrl+Up and Shift variants that move from the scrolled rows into the frozen ones bring the scrolled rows back to the top, so the rows in between are seen again (Page Up from far down used to end on row 1 with the view still a page down); Ctrl+Left and Alt+Page Up do the same for frozen columns. Other ways of selecting a frozen cell (click, Find, Go To, Undo, formula pointing) leave the view where it is |
+| 2026-10-23 | minor | After a left-drag of the fill handle an Auto Fill Options button sits below the filled cells; its menu redoes the fill as Copy Cells, Fill Series, Fill Formatting Only or Fill Without Formatting (undoes the drag's fill, then `edit.autoFill` in that mode). It goes away when the workbook changes or the selection moves (#1403) |
+| 2026-10-22 | minor | Show Outline Symbols (`view.showOutlineSymbols`, Ctrl+8): a sheet can hide the outline's level buttons and brackets while keeping its outline, as Excel saves with `showOutlineSymbols="0"` (read and written); the grid then gives the bands no room |
+| 2026-10-22 | minor | A number in a repeat-fill format (`*`, as in the Accounting format) that is too wide for its column shows #### like any other number, instead of the fill rebuilding the value so its leading digits were cut off (2,509.00 CHF drawn as "509.00 CHF") |
+| 2026-10-21 | minor | Background error checking, first part (#1994): a constant whose text would be a number if typed (signs, thousands, currency, percent, exponent, parenthesised negative) gets Excel's green corner triangle; the active cell then shows a warning button whose menu names the problem and offers Convert to Number for the selection (`formulas.convertToNumber`). Dates, times and fractions kept as text and formula results are not flagged, as in Excel |
+| 2026-10-21 | minor | Paste Special laid out as Excel's: Paste and Operation options each in two columns inside a frame, Skip blanks and Transpose side by side, Paste Link as a button that pastes references at once; labels translated (the generic form didn't translate them) and the window no longer runs past the screen |
+| 2026-10-21 | minor | Form dialogs (conditional-format quick rules, New Name, Remove Duplicates, Text to Columns and every other `Dialog::form`) fit their content: OK and Cancel sit in a row under the last field instead of a right-to-left layout that took the screen's whole height and left the buttons floating halfway down |
+| 2026-10-20 | minor | Esc and Enter close a message over the cell editor, such as a data validation alert, and the entry stays open to fix, with the keyboard back in it. Before, the editor took them (the first Esc cancelled the edit behind the alert and only the second closed it), and after the message typing went nowhere until the cell was clicked |
+| 2026-10-19 | minor | Ctrl+Enter (`range.fill`) gives each cell what typing the input there gives: a General cell gets the automatic number format (`5%`, `$5`, `3/4/2026`, `=TODAY()`) even when it already held a value, and a cell with its own format, a formatted row or column, or Text keeps it. Cells that held a value used to keep General (`5%` showed 0.05), and empty cells took the active cell's format |
+| 2026-10-19 | trivial | While a mouse button is held (a click or a drag selecting cells) the selection outline is drawn on its cells at once instead of gliding after the pointer, which read as lag; keyboard moves still glide |
+| 2026-10-18 | minor | Keytip letters typed with left Alt held continue the sequence (Alt+H, O, A / Alt+H, O, I ran nothing before: Alt+letter cancelled keytips); other Alt combinations, AltGr and macOS Option are unchanged (#1846) |
+| 2026-10-17 | minor | A Ctrl+Alt+letter key that types a character (a user-defined Windows hotkey such as Ctrl+Alt+A for `ä`) types it instead of running the Ctrl+letter shortcut, e.g. Select All (#1530) |
+| 2026-10-16 | minor | Right-drag on the fill handle opens the fill menu on release: Copy Cells, Fill Series, Fill Formatting Only, Fill Without Formatting, Series…; Esc cancels the drag or closes the menu without filling |
+| 2026-10-16 | minor | With the active cell in a Table whose header row is scrolled out of view, the column headings show the header names and their filter buttons in place of the letters (#1423) |
+| 2026-10-16 | minor | Ctrl+6 hides every object (charts, pictures, shapes, slicers) and shows them again; hidden objects are not drawn, take no clicks and drop their selection, and the setting is saved with the workbook (`workbookPr showObjects`) |
+| 2026-10-16 | minor | Ctrl+Shift+A (Control+Shift+A on a Mac) after a function name, or after its `(`, inserts the argument names and the closing parenthesis, as in Excel; one Undo in the editor takes them back |
+| 2026-10-16 | minor | Advanced Filter ribbon dialog, optional criteria for unique-only extraction (#1622); safe copy-to output (#1031) |
+| 2026-10-16 | minor | Remove Duplicates shows an editable Range field initialized from the selection and passes it to the engine on OK (#1388). Live range-picking outside the dialog remains unsupported |
+| 2026-10-16 | minor | Web printing registers one-shot `afterprint` cleanup before opening the dialog; missing content windows and setup, listener or print failures also release the hidden iframe and PDF blob URL (#1054) |
+| 2026-10-16 | minor | The shared UI clock delegates to the core Unix-millisecond clock, which reads Date.now() on wasm, instead of returning zero there (#1026). Native clock contract tested; browser timing remains unverified |
+| 2026-10-16 | trivial | Web: preferences (theme, interface size, language, editing options…) are kept in the browser's `localStorage` between visits, as the desktop app keeps `ui.json` and `prefs.json`; before, a reload brought back light mode and the defaults (#1562) |
 | 2026-10-15 | minor | File › Options › Formulas: Maximum Iterations (1 to 32767) and Maximum Change (0 or more) under Enable iterative calculation, disabled while it is off; invalid entries are refused with a message |
-| 2026-10-12 | minor | The File view's recent list tells when each workbook was last changed, read off the UI thread |
+| 2026-10-15 | minor | Number-format named colors use their RGB values; indexed `[Color1]`–`[Color56]` resolve through the shared legacy palette in grid and PDF (#1452) |
+| 2026-10-14 | minor | Spill-child formula bar uses the anchor formula with disabled theme text and blocks formula-bar edit entry; selection and recalculation restore ordinary behavior |
+| 2026-10-14 | minor | PivotTable source-field list fills the pane width so its scrollbar stays at the list's right edge |
+| 2026-10-13 | minor | Dragging a sheet tab with Ctrl held (Cmd or Option on macOS) drops a copy of the sheet where the tab is released, with the copy cursor (#971) |
+| 2026-10-13 | trivial | More Colors… and Recent Colors (#928) |
+| 2026-10-13 | minor | Grid drags keep their own cursor over selection borders, fill handles and outside the grid; hover resumes on release (#936) |
+| 2026-10-13 | minor | AutoFill month patterns retain the workbook's date system, preventing shifted dates in 1904 workbooks when filling forward or backward |
+| 2026-10-13 | minor | Sheet tab bar: the tab strip shrinks to its tabs, up to 60% of the bar, so New sheet (+) sits right after the last tab and the horizontal scrollbar takes the rest (part of #943) |
 | 2026-10-13 | minor | Horizontal scrollbar in the sheet tab bar: drag, track click pages, frozen columns excluded from the page (#840) |
+| 2026-10-13 | minor | Formula-entry Command/Ctrl-click adds arguments and Shift-click extends references; ordinary replacement and dragging retain their behavior. Readiness estimates unchanged. |
+| 2026-10-12 | minor | Next/previous sheet navigation no longer activates hidden worksheets at either workbook boundary; command tests cover Hidden, VeryHidden and selection retention |
+| 2026-10-12 | minor | The File view's recent list tells when each workbook was last changed, read off the UI thread |
 | 2026-10-12 | minor | Ctrl+wheel zoom steps along a ladder of percentages about 20% apart that never skips 100%, gliding to each step with animations on, so a notch out undoes a notch in (it drifted: 100 → 122 → 101); Excel steps 15 points, see decisions.md |
 | 2026-10-12 | minor | Page Layout view: left/right/top/bottom margins are dragged on the rulers (#792) |
 | 2026-10-12 | minor | Alt+Down opens the active filter header's existing popup, with validation priority and mirrored anchoring on right-to-left sheets (part of #441) |