Preserve `reusable` for portable message presentation buttons and carry it through Discord component registration so repeatable callbacks stay available after a successful interaction.
Also keeps `reusable` through legacy presentation-to-interactive conversion and documents the user-visible change in the changelog.
Verification:
- `pnpm test src/interactive/payload.test.ts extensions/discord/src/shared-interactive.test.ts extensions/discord/src/components.test.ts -- --reporter=verbose`
- `git diff --check`
- `AUTOREVIEW_AUTO_TESTS=0 .agents/skills/autoreview/scripts/autoreview --mode local`
- PR CI at `52f25221b3e01f3255d8df37df73d0357ab7410b`: all completed checks green/skipped/neutral except pending CodeQL `Security High (mcp-process-tool-boundary)` at time auto-merge was armed.
Co-authored-by: OpenClaw Contributor <100menotu001@users.noreply.github.com>
