[FIX] mrp: clean bom overview report

Does 2 things:
- ensure that the "free_qty" doesn't display a negative value (=>
  consistent with MO overview + avoids neg "Ready to Produce" values)
- ensure that showOptions.availabilities is always a Boolean and never
  "undefined" (=> avoid traceback when opening overview while in debug
  mode)

closes odoo/odoo#140767

Signed-off-by: Quentin Wolfs (quwo) <quwo@odoo.com>

addons/mrp/report/mrp_report_bom_structure.py

@@ -380,7 +380,7 @@ class ReportBomStructure(models.AbstractModel):
     @api.model
     def _get_quantities_info(self, product, bom_uom, product_info, parent_bom=False, parent_product=False):
         return {
-            'free_qty': product.uom_id._compute_quantity(product.free_qty, bom_uom) if product.detailed_type == 'product' else False,
+            'free_qty': max(product.uom_id._compute_quantity(product.free_qty, bom_uom), 0) if product.detailed_type == 'product' else False,
             'on_hand_qty': product.uom_id._compute_quantity(product.qty_available, bom_uom) if product.detailed_type == 'product' else False,
             'stock_loc': 'in_stock',
         }

addons/mrp/static/src/components/bom_overview/mrp_bom_overview.js

@@ -21,7 +21,7 @@ export class BomOverviewComponent extends Component {
         this.state = useState({
             showOptions: {
                 uom: false,
-                availabilities: false || this.props.action.context.activate_availabilities,
+                availabilities: false || Boolean(this.props.action.context.activate_availabilities),
                 costs: true,
                 operations: true,
                 leadTimes: true,