351: reserve footer flow-table border clearance (#2585)

Co-authored-by: Brandon Thomas <echelon@gmail.com>

docs/layout-parity.md

@@ -195,6 +195,8 @@ TOC refresh reuses direct tab formatting from the first cached entry with a numb
 
 Explicit cell page breaks (Word for Mac 16.113.2, compatibility modes 14 and 15): leading, interior and trailing breaks take no line height. Ordinary line breaks retain their lines; body page breaks still paginate. Synthetic regressions preserve UTF-8 cluster boundaries, bookmark objects and source offsets, including body/cell cache reuse without table-style formatting. Width, border strokes and residual row metrics remain outside this change.
 
+Footer flow-table strokes reserve their drawn top edge, including the half-width above the cell box. Original Word for Mac 16.113.2 mode-15 controls confirm the three footer cases move to the next page. The 3 pt row-end border case without a footer still differs. Tight row-end and continuation border fitting remain separate.
+
 ## Revision history
 
 | Date | Change | Summary |
@@ -224,6 +226,7 @@ Explicit cell page breaks (Word for Mac 16.113.2, compatibility modes 14 and 15)
 | 2026-10-16 | trivial | Zero-extent drawing anchors contribute no inline font height. Synthetic regressions. |
 | 2026-10-16 | trivial | Preserve direct TOC number tabs during regeneration |
 | 2026-10-16 | trivial | Explicit cell page breaks take no line height; original native Word controls in modes 14 and 15 and synthetic cluster/cache regressions. |
+| 2026-10-16 | trivial | Flow-table top border strokes in footers reserve body clearance; original mode-15 Word controls and a synthetic layout regression. |
 | 2026-10-14 | trivial | Row table border exceptions draw without leaking into other rows |
 | 2026-10-14 | trivial | Consistent cell widths override a stale table grid |
 | 2026-10-14 | trivial | Paragraphs inside complex-field instructions take no flow height; empty result paragraphs keep their line. |