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* Bidi: auto-detect RTL paragraph direction and keep typing caret advancing smoothly When typing in Kurdish, Arabic or Hebrew in a new document, default paragraph direction (bidi: None) was resolving to LTR. In an LTR paragraph, visual reordering pinned newly typed characters and the caret to the left margin (x = 72.0), resetting to the start of the line with every keystroke. - Add first_strong_is_rtl() following UAX #9 rules P2/P3. - Auto-resolve unassigned paragraph direction to RTL in layout when the paragraph starts with an RTL script. - Auto-promote paragraph to RTL (bidi = Some(true)) when typing text starting with an RTL character. - Add regression test in wordcraft-engine. * Review fixes for #713: RTL only when typing into an empty paragraph - Drop the layout fallback that drew any paragraph without w:bidi as RTL when its first strong character is Arabic/Hebrew: opened DOCX paragraphs keep their direction, and a style that sets bidi=false is respected. - type_text promotes a paragraph to RTL only when it had no letters before the insert and nothing (paragraph, style chain, document defaults) sets its direction; typing into a paragraph that already has text no longer flips it. - docs/typing-parity.md: Text direction section; test in tests_typing.rs. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> --------- Co-authored-by: Brandon Thomas <echelon@gmail.com> Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>