Release v0.76.4

🤖 AI-Generated Changelog

Added

• Introduced createBuilderStore() factory to centralize and manage form builder state

Changed

• Wired form builder history onto the store for unified state management

Fixed

• Resolved stale preview issue when toggling multi-step forms
• Updated step test fixtures to use title instead of label to match production data shape

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🔗 Full Changelog: v0.76.3...v0.76.4