[Due for payment 2026-04-28] Extract ActionableWhisperContent from PureReportActionItem

[cristipaval]

Extract the 3 actionable whisper branches (fraud alert, join request, mention whisper) and their button logic from PureReportActionItem into a standalone ActionableWhisperContent component.

PR: #87507

Issue Owner

Current Issue Owner: @rojiphil

[LukasMod]

PR merged #87507

[melvin-bot]

Reviewing label has been removed, please complete the "BugZero Checklist".