Surfaces the per-part description template on the SO line list alongside
a hidden-by-default internal description column. Picking a template
fires an onchange that copies `customer_facing_description` into Odoo's
standard `name` (customer-visible) and `internal_description` into
x_fc_internal_description (shop-floor / WO only). Estimator can edit
either field after the template is applied.
The template picker's domain filters by the line's part, and the field
stays hidden until a part is chosen — avoids showing every global
template when the line is blank.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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