Add export to PNG/SVG button

[Ananya-vastare]

Description:

Currently, users can view diagrams rendered from Mermaid syntax but there is no direct way to download them. It would be very helpful to have an option to export diagrams as PNG or SVG files. This would allow users to embed diagrams in documents, slides, or reports more easily.

Suggested Solution:

1. Add a button (e.g., “Export”) in the UI.
2. Provide options for exporting as PNG and SVG.
3. Optionally, allow setting a filename before download.

Benefits:

1. Makes the tool more practical for documentation and presentations.
2. Eliminates the need for external screenshot tools.
3. Improves accessibility for non-technical users who just need the image output.

[Ananya-vastare]

@ad1992 Can you assign this issue to me asap

[dewanshshekhar]

@ad1992
can you assign this mission to me

[ad1992]

Thank you for the feedback @Ananya-vastare . Sure we can add this enhancement. Since no progress has been made for this, @dewanshshekhar please go ahead

[beingPro007]

as we can see that any one can download the png and svg normally without any enhancement can you please elaborate actually what we need in the pull request as excalidraw already allow in their core packages like this

import {
  exportToBlob,
  exportToSvg,
} from "@excalidraw/excalidraw";

if this is the only case then we are good to go and i don't think we need any more changes.