Apply slide comments

The open-slide editor has a comment mode that lets the user click a rendered page element, or drag across a region of the page, and attach a textual comment (e.g. "make this red", "change to 'Open Slide Rocks'"). Each comment is persisted as an in-source JSX marker inside slides/<slideId>/index.tsx.

Your job: read those markers, perform the described edits, and delete the markers.

Before making any page edit, consult the slide-authoring skill — it is the technical reference for how slides/<id>/index.tsx is structured (canvas, type scale, palette, assets, file contract). A comment like "make this bigger" or "change the accent colour" should be applied in a way that stays consistent with those rules.

Marker format

{/* @slide-comment id="c-<8hex>" ts="<ISO>" text="<base64url(JSON)>" */}

• Sits as the first child inside the JSX element it refers to (i.e. between that element's opening > and its other children). The marker is dropped into its target, not floated above it. Newly written markers get a line of their own; older ones may share a line with the content that follows them.
• text is base64url-encoded JSON: {"note": "...", "hint"?: "...", "rect"?: {"x", "y", "w", "h"}, "page"?: n}.
  • rect is present when the comment was left on a dragged region rather than on an element. Values are pixels on the 1920×1080 page canvas, measured from the page's top-left corner. The marker still sits inside the deepest element that contains the region, but the note refers to what is inside that region — possibly several children, or only part of the enclosing element.
  • page is the 0-based index (into the default export array) of the page the comment was left on.
• Detection regex (authoritative — use exactly this):