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## What Fixes #16008 — tables contained in a DOCX are silently dropped when the document is parsed with the **laws** chunking method. ## Root cause `Docx.__call__` in `rag/app/laws.py` iterated `self.doc.paragraphs`, which only yields paragraph elements. Tables are separate `tbl` blocks in the document body, so they were never visited and were lost from the output. (The `naive` parser already handles tables by iterating the document body.) ## Changes - Iterate `self.doc._element.body` so tables are visited in document order alongside paragraphs. - Add a `__table_to_html` helper that renders each table to HTML, including merged-cell `colspan` detection (mirrors the `naive` parser's logic). - Inject each table into the section tree with a sentinel level deeper than any heading, so `Node.build_tree` merges it into its **enclosing section** — keeping the chapter/article title path as retrieval context rather than producing an orphaned chunk. - Guard the `h2_level` computation against an empty heading set, so a tables-only or empty DOCX no longer raises `IndexError`. This keeps the laws parser's hierarchical chunking **and** adds table extraction, so users no longer have to choose between losing structure (naive) or losing tables (laws). ## Tests Adds `test/unit_test/rag/test_laws_docx_tables.py` covering: - table content is preserved and carries its section title path, - merged adjacent cells collapse to `colspan`, - tables-only document does not crash, - empty document returns `[]`. All four pass; `ruff check` / `ruff format` are clean.