Update Checkout Theme
Dashboard
Update Checkout Theme
Merge body fields into merchants.checkout_theme.
Fields with explicit null values clear that key; fields not
present in the body are untouched. JSONB merge happens in
Python so the existing extra keys (non-canonical merchant
customizations) round-trip unchanged.
PATCH
Update Checkout Theme
Body
application/json
Partial-update payload for merchants.checkout_theme.
Every field is optional — present fields overwrite the matching key,
fields explicitly set to null clear that key, omitted fields are
untouched. Lets the dashboard panel render a single Save button
without sending the whole theme on every save.