PPTX converter fixed to follow true slide order instead of filename order

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A developer found that a pitch deck converted to Markdown placed the appendix before the main pitch because the converter read slide files alphabetically. In PPTX files, slide filenames like slide1.xml do not reflect presentation order, which is instead defined in presentation.xml. The fix parses the slide ID list and resolves each relationship ID to its target file, so slides appear in the order the author intended. The developer compares this to similar ordering issues in spreadsheets and EPUB files, where the index rather than the filename determines sequence. The corrected tool is available as part of the author's document tooling online.

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