[FIX] estate_account: correct admin fees and use float_compare

- Restore "Administrative fees" invoice line with fixed amount (100.0)
- Use float_compare for selling price constraint to handle rounding safely
- Prevents false ValidationErrors and ensures invoice lines follow business logic

Author: jupao-odoo

estate/models/estate_property.py

@@ -1,5 +1,6 @@
 from odoo import models, fields, api
 from odoo.exceptions import UserError, ValidationError
+from odoo.tools.float_utils import float_compare
 from dateutil.relativedelta import relativedelta
 
 
@@ -133,9 +134,10 @@ def action_sold(self):
     @api.constrains("selling_price", "expected_price")
     def _check_selling_price_min(self):
         for record in self:
-            if (
-                record.selling_price and record.expected_price and record.selling_price < record.expected_price * 0.9
-            ):
+            if not record.selling_price or not record.expected_price:
+                continue
+            # approximate comparison: selling_price >= 90% of expected_price
+            if float_compare(record.selling_price, record.expected_price * 0.9, precision_digits=2) < 0:
                 raise ValidationError(
                     "The selling price cannot be lower than 90% of the expected price."
                 )

estate_account/models/estate_property.py

@@ -28,9 +28,9 @@ def action_sold(self):
                         "price_unit": property.selling_price * 0.06,
                     }),
                     Command.create({
-                        "name": f"Selling price for {property.name}",
+                        "name": "Administrative fees",
                         "quantity": 1,
-                        "price_unit": property.selling_price,
+                        "price_unit": 100,
                     }),
                 ],
             }