- Replace bare int() casts for start/end/context_chars in chunk_context_endpoint
with _parse_int_param, matching visualization.py bounds (0–10M for offsets,
0–10K for context_chars), and add the missing end > start guard.
- Initialize page_number from chunk_context.page_number so non-file doc_types
surface it; include page_number, chunk_index, and total_chunks unconditionally
in the response. Only highlighted_page_image stays gated on its own truthiness.
- Add a chunk_index forwarding regression test that asserts the new kwargs reach
get_chunk_with_context and appear in the response payload.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
