Re-render templates client-side with real data in email preview

Shipped: March 18, 2026 at 7:26 PM UTC
Author: kamo
Commit: 50fc874

The preview was showing placeholder text ({{member.firstName}} etc.) because it used the pre-rendered placeholder HTML from the backend. Now the MessageTool: - Fetches the template config from backend and maps it to SignatureConfig - Fetches live member profile + org data via useSignatureData hook - Resolves actual image URLs via useImageResolver hook - Re-renders header and signature HTML client-side using the template render functions with real member/org data - Shows accurate preview with actual names, emails, logos, and styling

All changes

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