Apply slide comments

The open-slide editor has an inspector tool that lets the user click on a rendered page element 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)>" */}

• Always sits on its own line 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.
• text is base64url-encoded JSON: {"note": "...", "hint"?: "..."}.
• Detection regex (authoritative — use exactly this):