modify pdftomd

docs/KNOWLEDGEBASE.md

@@ -1,13 +1,13 @@
 # Knowledge Base: Local PDF-to-Markdown Converter for Math-Heavy Documents
 
-Last updated: 2026-05-07
+Last updated: 2026-05-11
 
 ## 1. Product Direction
 
 This project will build a local-first PDF-to-Markdown converter for math-heavy academic PDFs and books. The v1 target is intentionally narrow:
 
 - Processing policy: local-only. Do not send user PDFs to cloud OCR or external AI APIs.
-- Primary interface: CLI plus Python library.
+- Primary interface: CLI plus Python library. A later thin local desktop launcher may wrap the CLI, but it must not become a separate conversion pipeline.
 - Primary output: Obsidian-friendly Markdown.
 - Main conversion engine: MinerU 3.1.0.
 - Math output: inline math as `$...$`, display math as `$$...$$`.
@@ -73,7 +73,7 @@ Rules:
 
 - Inline math: `$...$`.
 - Display math: `$$...$$` on separate lines.
-- Store extracted images in a sibling assets directory, for example `paper.assets/page-003-figure-01.png`.
+- Store extracted images in the PDF output folder's shared `images/` directory, for example `paper/images/page-003_figure-01.png`.
 - Use relative links from the Markdown file to assets.
 - Preserve page boundaries in metadata, not by noisy visible page markers in the main Markdown.
 - Prefer normal Markdown tables for simple tables.