Merge #83 (update): Layout: first baselines, Jump Object wrap, drop caps, IDML defaults

Conflict: crates/format/src/lib.rs: next's side (upgrade, merge_duplicate_assets, then mark_differing_margins_local) in both loaders
Conflict: docs/target-app-parity.md: next's RTL and Interface Language lines, plus #83's "IDML Kashidas"

docs/target-app-parity.md

@@ -265,14 +265,14 @@ The inventory below was the "Working today" list of ROADMAP.md (moved here 2026-
 It is evidence of breadth: each item exists. It is not a claim of InDesign-level depth.
 
 - Document model: facing/non-facing spreads, parent pages with page-number markers, sections, layers, frames (text / graphic / unassigned), threaded stories, paragraph/character/object styles with based-on, swatches (process/spot/tints/gradients), corner options, text wrap, drop shadow, opacity/blend.
-- Text engine: Knuth–Plass paragraph composer and single-line composer, dictionary hyphenation (public-domain Moby list + our own trained Liang patterns), justification with word/letter/glyph-scaling ranges, keep options (keep with next, keep lines together, widows/orphans), balance ragged lines, optical margin alignment, hyphenation zone/limit, columns, threading across frames and spreads, tabs, bullets/numbering, rules, shading, baseline grid, first-baseline options, vertical justification, wrap exclusions, overset detection, caret/hit testing.
+- Text engine: Knuth–Plass paragraph composer and single-line composer, dictionary hyphenation (public-domain Moby list + our own trained Liang patterns), justification with word/letter/glyph-scaling ranges, keep options (keep with next, keep lines together — at start/end of paragraph by default, as in InDesign — widows/orphans), balance ragged lines, optical margin alignment, hyphenation zone/limit, columns, threading across frames and spreads, tabs, bullets/numbering, rules, shading, baseline grid, first-baseline options, vertical justification, wrap exclusions, overset detection, caret/hit testing.
 - FID2: IDML underline/strikethrough Text Color resets survive style inheritance and roundtrip. Raster and PDF paint underlines behind glyphs, retain strikethrough above, and center rules on their offsets; synthetic overlap tests cover both backends.
 - Rendering: vello_cpu (SIMD, multithreaded) — pages, items, images with mip levels, gradients, composed text.
 - UI (egui): application bar + menus, Control panel (object and text modes), Tools panel with flyouts, document tabs, rulers, pasteboard, guides (margins, columns, bleed, baseline grid), document grid (View ▸ Grids & Guides, ⌘', on the snap positions, behind or in front of items), frame edges, selection handles, text ports and threads, Properties / Pages / Layers dock, Swatches, Styles, Character, Paragraph, Stroke, Text Wrap panels, New Document and Preferences dialogs, Quick Apply (⌘Return), 4 brightness themes.
 - Pen tool, Direct Selection anchor/handle editing, rotate from corners, Rotate/Scale/Shear tools, Eyedropper, snapping & smart guides, Align/Distribute, Find/Change (text + GREP), Story Editor, Paragraph Style Options, Effects panel, hidden characters, native macOS menu bar, measured InDesign 2026 look (Medium Dark): Properties sections per selection state, 21 pt spinner fields with arithmetic, Contextual Task Bar, inverse (black) text selection, Pages panel with drag-and-drop reorder / parent apply, Layers panel with per-object rows, expandable groups and drag-and-drop reorder of layers and objects (the selection square moves the selection to another layer).
 - Tools: Selection (click, marquee, move, Alt-duplicate, resize handles), Direct Selection, Type (draw frame, click caret, select, type), Rectangle/Ellipse/Polygon (+ frame variants), Line, Hand, Zoom.
 - PDF export (krilla): real selectable text with embedded font subsets, DeviceCMYK/RGB + spot Separations, bleed boxes, crop/bleed marks + page info, pages or spreads, PDF/A-2b (PDF/X-4 output intent pending) — `file.exportPdf`, File › Export PDF…, `designcraft-cli run --export out.pdf`. File › Export PDF… now opens an "Export PDF" options dialog (General / Compression / Marks and Bleeds / Advanced) and remembers the last-used settings across exports and sessions.
-- IDML interchange (`designcraft-idml`): export and import of swatches, styles, fonts, preferences, parent spreads, spreads/pages, frames, groups, images (embedded or linked), formatted threaded stories — opens in InDesign 2026 and round-trips InDesign-exported files (`file.exportIdml`, `file.openIdml`, File → Export IDML…, CLI `--in x.idml` / `--export x.idml`).
+- IDML interchange (`designcraft-idml`): export and import of swatches, styles, fonts, preferences, parent spreads, spreads/pages, frames, groups, images (embedded or linked), formatted threaded stories; attributes a file leaves unset take InDesign's defaults (Keep Lines Together at start/end of paragraph, 12 pt corners, paragraph rules in Text Color, auto-sizing from the centre, numbered lists restarting in each story, alternating table fills Black 20 % / None; a tint of −1 is the colour's own; frames take the fill, stroke, corners and Text Frame Options they don't write from their object style chain, then [None]) — opens in InDesign 2026 and round-trips InDesign-exported files (`file.exportIdml`, `file.openIdml`, File → Export IDML…, CLI `--in x.idml` / `--export x.idml`).
 - Tables (M8): tables anchored in stories (header/footer/body rows, merged cells, per-edge strokes, fills + alternating fills, insets, vertical justification, at-least/exact row heights); composed into the text column (columns scale to fit, rows break across columns/frames with repeating headers/footers, overset); rendered, exported to PDF (real text) and IDML (export + import); Table menu, Table panel, Create Table dialog, caret/typing/Tab navigation and cell selection in cells; `table.*` commands.
 - Hyperlinks (text or frames → URL / e-mail / page) and bookmarks, exported as PDF link annotations and outline.
 - EPUB 3 (reflowable) export: stories in reading order, CSS from paragraph/character styles, images, navigation (`file.exportEpub`, CLI `--export x.epub`).
@@ -321,6 +321,7 @@ It is evidence of breadth: each item exists. It is not a claim of InDesign-level
 - Appearance of Black complete: Printing/Exporting rich black for RGB output (PNG), Overprint [Black] Swatch at 100% (document, IDML OverprintBlack).
 - Hyperlinks and Bookmarks panels (Window ▸ Interactive): new from the selection, edit (`hyperlink.edit`), go to source (`hyperlink.goToSource`), rename bookmarks (`bookmark.rename`), go to page, delete.
 - Nested line styles (`nestedLineStyles` paragraph attribute, Paragraph Style Options › Drop Caps and Nested Styles, IDML AllNestedLineStyles): the first lines restyle until the line breaks settle.
+- Drop caps (`type.para {dropCapLines, dropCapChars, dropCapStyle, dropCapAlignLeft, dropCapScaleDescenders}`, Paragraph panel, Paragraph Style Options › Drop Caps and Nested Styles; IDML DropCapLines/DropCapCharacters/DropcapDetail, the drop cap style as the leading "through 1 Dropcap" nested style): the first characters (code points, as InDesign counts them, never splitting a letter from its combining marks; up to 150) are enlarged from the first line's cap height down N − 1 leadings of the text after them (up to 25 lines; grid steps on a baseline grid), the lines beside them are indented by their advance (on the right in right-to-left paragraphs), spaces right after them are set at their size without widening the indent, baselines don't move; a one-line drop cap keeps a smaller size of its own and sets its tabs at the paragraph's tab stops; Align Left Edge (on by default) moves the drop cap left by its first letter's side bearing so its ink starts at the indent; Scale for Descenders is kept but doesn't change the layout yet; a drop cap character style, and nested styles through the drop cap (Dropcap delimiter). Drawn on screen and in PDF (text in order), with caret, hit testing and selection over the enlarged letters. Vertical text sets no drop caps.
 - User dictionary hyphenation exceptions (`hyphenation.addException/removeException/list`, Edit ▸ Spelling ▸ User Dictionary): `ex~am~ple` breaks only at `~`, a plain word never hyphenates.
 - Frame Fitting Options (`object.fittingOptions`, Object ▸ Fitting ▸ Frame Fitting Options…): Auto-Fit refits on resize, fitting, Align From reference point, crop amounts; IDML FrameFittingOption.
 - Paragraph borders (per-side weights, colour, tint, offsets) and shading offsets, drawn per column part of split paragraphs (also when overset); Paragraph panel controls; IDML ParagraphBorder*/ParagraphShading*Offset.
@@ -363,7 +364,7 @@ It is evidence of breadth: each item exists. It is not a claim of InDesign-level
 - Split Window / New Window (`window.split`, `window.newWindow`, Window ▸ Arrange): two side-by-side views of the document with their own zoom, scroll and render cache. New Window puts the second view in its own OS window (an egui viewport; a floating window on the web).
 - Transparency flattener (`file.exportPdf {flatten: high|medium|low|ppi}`, Edit ▸ Transparency Flattener Presets): each object involving transparency becomes an opaque image of its area over what's beneath it, so everything else stays vector (spreads with transparent parent items are rasterised whole).
 - Video and sound (place .mp4/.mov/.webm/.mp3/.wav…, `media.options/get`, Media panel): media frames show a poster or placeholder on screen, in print and in PDF, and export as HTML5 `<video>`/`<audio>` in EPUB. Interactive PDF export (`file.exportPdf {media: true}`, File ▸ Export PDF (Interactive)) embeds each file and plays it in a Screen annotation through a rendition action (controls, loop, play on page load). No in-app playback.
-- Right-to-left text (World-Ready basics): right-to-left runs are shaped right to left, lines are reordered by the Unicode Bidirectional Algorithm (matched against the reference implementation), Paragraph Direction (`type.para {direction}`, Paragraph panel, IDML ParagraphDirection, EPUB `dir`). Digits (`digits`: Default, Arabic, Hindi, Farsi, Native by language; Character panel for right-to-left text; IDML DigitsType) draw 0–9 in another script. Kashidas (`kashidas` paragraph attribute, on by default): justified Arabic lines stretch at one join per word (after seen/sad when possible, never inside lam–alef) with a drawn tatweel before word spaces widen. Carets follow the drawing: the caret before a right-to-left glyph sits at its right edge, arrow keys move as drawn (by words in the line's direction), clicks find the nearest drawn caret position and selections highlight the selected glyphs. Binding: Right to Left (Document Setup, `layout.documentSetup {binding}`, IDML PageBinding) makes page 1 a left page and lays spreads out right to left.
+- Right-to-left text (World-Ready basics): right-to-left runs are shaped right to left, lines are reordered by the Unicode Bidirectional Algorithm (matched against the reference implementation), Paragraph Direction (`type.para {direction}`, Paragraph panel, IDML ParagraphDirection, EPUB `dir`). Digits (`digits`: Default, Arabic, Hindi, Farsi, Native by language; Character panel for right-to-left text; IDML DigitsType) draw 0–9 in another script. Kashidas (`kashidas` paragraph attribute, on by default; IDML Kashidas): justified Arabic lines stretch at one join per word (after seen/sad when possible, never inside lam–alef) with a drawn tatweel before word spaces widen. Carets follow the drawing: the caret before a right-to-left glyph sits at its right edge, arrow keys move as drawn (by words in the line's direction), clicks find the nearest drawn caret position and selections highlight the selected glyphs. Binding: Right to Left (Document Setup, `layout.documentSetup {binding}`, IDML PageBinding) makes page 1 a left page and lays spreads out right to left.
 - Interface language (Preferences ▸ General ▸ Interface Language, `app.language`; each language listed by its own name): German, French, Spanish, Italian, Japanese, Simplified Chinese and Arabic menu titles, common menu items and panel names (our own translations). Common dialog, panel and tooltip labels are also localized, with English fallback for untranslated strings. Arabic translations cover every key in the shared interface translation table, including menu commands and utility labels. The Type menu's Story Direction, Horizontal/Vertical, Tate-Chu-Yoko, Ruby… and Kenten are translated too. Arabic labels use Unicode bidi run ordering and contextual shaping; welcome and new-document form layouts follow RTL direction independently of document binding. CJK and Arabic glyphs come from [craft-fonts](https://github.com/storytold/craft-fonts) when built with `CRAFT_FONTS_DIR` (all releases): BIZ UDPGothic and Noto Sans CJK SC for the UI (Chinese forms first in the Chinese interface), Noto Sans Arabic, and Mincho for Japanese documents (the web build embeds BIZ UDPGothic only); otherwise from system fonts. Ukrainian covers all 1,430 existing catalog keys, including publishing dialogs and built-in names, with persisted selection, grammatical count captions, English fallback and bundled Cyrillic UI glyph coverage.
 - Page transitions (`page.transition/transitions`, Page Transitions panel): twelve transition types with speed and direction per spread, written into exported PDFs as `/Trans` entries through an incremental update.
 - PDF/X-4 export (`file.exportPdf {standard: "x4"}`): an output intent with our own Generic CMYK ICC profile (lut16 tables generated from the parametric press model), GTS_PDFXVersion in Info and XMP, `pdf:Trapped` in XMP as in Info, RGB images without a profile tagged sRGB, no image interpolation (none in PDF/A either), and built-in PDF/X-4 checks reported as warnings. qpdf finds no errors in the result.