fix: don't double send message from issue detail

Tomas Vik (OOO back on 2026-01-05)requested to merge
215-fix-double-comments into main

Part of #215 (closed)

This MR fixes an issue when we registered an event listener twice and then sent two messages when the user made a comment in the webview.

before after
before-double-send after-double-send
Edited by Tomas Vik (OOO back on 2026-01-05)

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