## Problem
In the Go PDF pipeline, `processTablesWithReplacements`
(`internal/deepdoc/parser/pdf/table/table_post.go`) marked **every** box
overlapping a DLA table region for removal, then `insertTableBoxes`
re-inserted an HTML box only when `buildTableHTMLs` produced one.
When DLA over-labels a **text** box as a table but TSR produces **no
cells** (so `buildTableHTMLs` skips the table and `htmls[ti]` is unset),
the box was removed with nothing re-inserted — the original text was
**silently dropped**.
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