Themes - Streamly

Themes (/admin/themes) switches the public storefront between ready-made design packages under themes/<id>/.

Built-in packages (all Final)

Theme	ID	Status	Category	Capabilities
Streamly	`streamly`	Final default	Standard	Features section ✓ · light mode ✗
Streamlix	`streamlix`	Final	Cinematic	Features ✗ · light ✗
StreamTube	`streamtube`	Final	Discovery	Features ✗ · light mode ✓

Theme	Page shell	Button chrome	Corners
Streamly	`max-w-7xl`	Bevel	Soft radius
Streamlix	Full-bleed nav gutter	Flat	Square / sharp
StreamTube	Full-bleed guide gutters (same shell family as Streamlix)	Flat	Soft ~12px (not sharp)

Prefer capabilities over hardcoding theme ids. Zip marketplace UI stays hidden (SHOW_THEME_PACKAGE_IO_UI = false).

Action	Behavior
Apply	Persists theme; snapshots previous look into `theme_presets[previous]`; restores target preset or seed. Never overwrites SEO / product / content keys.
Preview	`/?__theme_preview=<themeId>` — operator-only, in-memory. Switches `html[data-storefront-theme]` chrome too. Floating banner links back to Themes.

Live look changes only on Apply or Brand & Experience edit — install/export never auto-apply.