Bring back custom HTML/CSS/JS support to the new Storefront editor

The new Storefront editor is great for simplicity, but it removed the code editor that Legacy had. Right now there’s no way to add custom HTML/CSS, use frameworks like Tailwind, load custom fonts, or build a fully custom layout - only the built-in blocks are available.

This is a big problem for theme developers and anyone who wants a unique-looking store. Many of us built advanced, polished designs in Legacy that simply aren’t possible to recreate in the new editor as it stands.

What we need:

• A custom code/HTML-CSS block (or full code mode) in the new storefront
• Support for custom fonts
• Support for external CSS/JS libraries (e.g. Tailwind)
• More layout flexibility beyond the current fixed blocks

Without these, developers can’t migrate their existing designs when Legacy is discontinued, and store owners lose the ability to have a truly custom storefront. Please consider adding proper custom code support before Legacy is phased out.