fix: rename chapter structure to document tree structure in query prompt

Author: rejojer

openkb/agent/query.py

@@ -24,7 +24,7 @@
 4. When you need detailed source content, check the summary's full_text field:
    - Short documents (full_text ends in .md): read_file(full_text) for the full text.
    - PageIndex documents (full_text ends in .json): use get_page_content(doc_name, pages)
-     to read specific pages. The summary shows chapter structure with page ranges.
+     to read specific pages. The summary shows document tree structure with page ranges.
 5. Synthesise a clear, well-cited answer grounded in wiki content.
 
 If you cannot find relevant information, say so clearly.
@@ -49,7 +49,7 @@ def read_file(path: str) -> str:
     def get_page_content_tool(doc_name: str, pages: str) -> str:
         """Get text content of specific pages from a long document.
         Use this when you need detailed content from a document. The summary
-        page shows chapter structure with page ranges.
+        page shows document tree structure with page ranges.
         Args:
             doc_name: Document name (e.g. 'attention-is-all-you-need').
             pages: Page specification (e.g. '3-5,7,10-12').