fix: filter inactive/attributeless variants from push wizard

Archived variants (active=False) and variants with no attribute values
were being included, causing WC 400 errors. Now only active variants
with attribute assignments are shown and pushed.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

fusion-woo-odoo/fusion_woocommerce/wizard/woo_variant_push.py

@@ -35,9 +35,12 @@ class WooVariantPushWizard(models.TransientModel):
                 res['product_name'] = tmpl.name
                 res['woo_product_id'] = pm.woo_product_id
 
-                # Populate variant lines
+                # Populate variant lines — only active variants with attribute values
                 lines = []
-                for variant in tmpl.product_variant_ids:
+                active_variants = tmpl.product_variant_ids.filtered(
+                    lambda v: v.active and v.product_template_attribute_value_ids
+                )
+                for variant in active_variants:
                     already_mapped = self.env['woo.product.map'].search([
                         ('instance_id', '=', pm.instance_id.id),
                         ('product_id', '=', variant.id),