Use HWP file's original LINE_SEG line_height/line_spacing values
directly instead of recalculating from font metrics. This preserves
한컴오피스's exact page composition (line heights, page breaks).

The previous code's Composer path would override LINE_SEG heights
when raw_lh < max_font_size, causing accumulated differences in
paragraph heights and incorrect page breaks.

For HWPX files (which lack LINE_SEG data), falls back to Composer's
calculated values.

Also adds comprehensive Korean font-family fallback mappings for
HY series, 한컴, 함초롬, and 휴먼 fonts to improve PDF rendering
on systems with 한컴오피스 installed.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

- Check LINE_SEG validity (line_height > 0) before trusting data
- HWPX files have LINE_SEG entries with all zeros; fall back to
  Composer path for these
- HWP binary files with valid LINE_SEG still get priority treatment
  for accurate page layout

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Apply convert_hwpx_to_hwp_ir() during from_bytes() for HWPX sources,
ensuring SectionDef controls are inserted into paragraph controls
before the first pagination/compose pass.

Previously, the HWPX adapter was only called in export_hwp_with_adapter()
(HWP save path). For PDF/SVG export, HWPX documents were missing
SectionDef controls in paragraph.controls, which could cause the
typesetter to misidentify section boundaries.

Also adds apply_hwpx_adapter() public method for manual invocation
and makes core field pub(crate) for binary access.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

HWPX parser may split text and TAC table into separate paragraphs,
leaving the table in an empty-text paragraph. The previous inline
check required text or 2+ tables, causing single TAC tables in
empty paragraphs to be treated as block tables (rendering failure).

Expand is_tac_table_inline() to accept single TAC tables whose
width fits within seg_width, regardless of text presence.

Also remove debug output from table_layout.rs.

Analysis: HWPX table header text disappears because page
composition differs (due to missing LINE_SEG), causing tables to
split across page boundaries (PartialTable rows=0..1 / 1..3).
The first partial (header row) ends up on the previous page where
it may overflow. Root cause is HWPX LINE_SEG absence, not the
inline check — but this fix improves TAC table handling generally.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>