Image PPTX export opens with repair warning and omits speaker notes

[whjstc]

Problem

The current Export as image PPTX output opens in Microsoft PowerPoint with a repair warning. Speaker notes from export const notes = [...] are also not included in the generated PPTX.

PowerPoint warning observed on macOS:

PowerPoint found a problem with content in ai-office-practice.pptx. PowerPoint can attempt to repair the presentation.

Observed behavior

• Export a deck using the UI action Export as image PPTX.
• Open the downloaded .pptx in PowerPoint.
• PowerPoint asks to repair the file.
• After opening/repairing, speaker notes are missing.

Expected behavior

• The exported image PPTX should open without repair.
• Speaker notes should be exported as PowerPoint notes, preserving the index-aligned slide.notes content.

Likely causes

src/app/lib/export-pptx.ts hand-writes OOXML. The generated package currently:

• renders slides as full-page PNGs, but does not create ppt/notesSlides/* or ppt/notesMasters/*;
• does not add notes relationships from each ppt/slides/_rels/slideN.xml.rels;
• does not include notes content type overrides;
• is missing standard package parts that PowerPoint adds during repair, such as docProps/*, ppt/viewProps.xml, and ppt/tableStyles.xml.

Local validation

A local patch that passes slide.notes into the image PPTX builder and emits notesMaster, per-slide notesSlide, notes relationships, content type overrides, docProps, viewProps, and tableStyles produced a PPTX with:

• valid ZIP structure (ZipFile.testzip() == None);
• XML parse success for all .xml files;
• one ppt/notesSlides/notesSlideN.xml per slide;
• each slide relationship file containing a notesSlide relationship;
• expected note text present in notesSlideN.xml.

Environment

• @open-slide/core: 1.10.0
• PowerPoint for macOS