feat: add pagination, individual price sync arrows, and bulk price sync

- Pagination with page nav for mapped, unmatched Odoo, and unmatched WC tabs
- Per-product arrow buttons to push price in either direction
- Bulk price sync buttons: All Prices Odoo→WC and All Prices WC→Odoo
- Server-side offset/limit with total count in search endpoints

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

fusion-woo-odoo/fusion_woocommerce/models/woo_instance.py

@@ -727,6 +727,30 @@ class WooInstance(models.Model):
             'price_unit': total,
         }
 
+    # ------------------------------------------------------------------
+    # Bulk Price Sync (UI actions)
+    # ------------------------------------------------------------------
+
+    def action_bulk_price_odoo_to_wc(self):
+        """Push all Odoo prices to WooCommerce for mapped products."""
+        self.ensure_one()
+        maps = self.env['woo.product.map'].search([
+            ('instance_id', '=', self.id),
+            ('state', '=', 'mapped'),
+            ('product_id', '!=', False),
+        ])
+        maps.action_push_price_to_wc()
+
+    def action_bulk_price_wc_to_odoo(self):
+        """Pull all WC prices to Odoo for mapped products."""
+        self.ensure_one()
+        maps = self.env['woo.product.map'].search([
+            ('instance_id', '=', self.id),
+            ('state', '=', 'mapped'),
+            ('product_id', '!=', False),
+        ])
+        maps.action_push_price_to_odoo()
+
     # ------------------------------------------------------------------
     # Product / Price Sync (Task 22)
     # ------------------------------------------------------------------