Root causes:
1. Font/color CSS consumption rules were added to platform blocks.css
but editor preview uses the THEME's blocks.css (which lacked them)
2. Reset buttons sent empty string which failed validation → 400 →
preview died silently
Fix: Added --sf-title-size/--sf-text-size/--sf-accent-c/--sf-btn-c
consumption rules to themes/trade-pro/blocks.css; reset now uses
clearStyleField() which deletes the key instead of setting ''.
Co-Authored-By: Claude Code <noreply@anthropic.com>
浅念
c12f0e28b2