Extract ~18 one-liner message branches (leave room, demoted, receipt scan failed, etc.) from PureReportActionItem into a standalone `SimpleMessageContent` component. PR: #87359 <details><summary>Issue Owner</summary>Current Issue Owner: @dmkt9</details>
Extract ~18 one-liner message branches (leave room, demoted, receipt scan failed, etc.) from PureReportActionItem into a standalone
SimpleMessageContentcomponent.PR: #87359
Issue Owner
Current Issue Owner: @dmkt9