Root cause found by comparing the full-book output (Word refused) with the
new mini-book fixture (Word opened): the output's styles.xml was replaced
by the template's, yet deep-copied manuscript paragraphs still referenced
four KDP paragraph styles (WorstChapter, WrstNrmlChapText, WrstSection,
WAChpNrm) and the Hyperlink character style. Word validates every
referenced styleId and refuses files with dangling references; LibreOffice
silently falls back to Normal.
- Add _merge_missing_styles(): copy any w:style referenced by the output
body but missing from styles.xml out of the source manuscript, resolving
basedOn/next/link chains. Runs at the end of Pass 2.
- Fix TOC entry construction to use paragraph_format.tab_stops (python-docx
inserts w:tabs in the schema-correct CT_PPr position instead of appending
after w:jc/w:spacing).
- Regression tests: test_style_references_resolve (no undefined pStyle/
rStyle) and test_body_pPr_children_schema_ordered (CT_PPr sequence).
55 tests pass. Full-book output regenerated (332 pages; merged styles
present; 0 undefined style refs; 0 pPr violations).
9e35f24627