Replaces the manual affiliate URL field with a program selector and
product identifier input. JS toggles visibility between program mode and
manual (custom URL) mode. retailer field is auto-populated from the
program name on save. INSERT/UPDATE statements include new program_id
and product_identifier columns. Validation accepts program+ID or manual
URL as the URL source.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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