[FIX] hr_holidays: show sum of closest allocations

In the time off dashboard, only the number of available days of the
first closest allocation to expire was shown, which is not correct.

If you have many allocations expiring on the same day, their sum should
be shown.

task-3203519

closes odoo/odoo#114010

X-original-commit: ff35654ae8c44014aab99ec07493f035e9a2d80d
Signed-off-by: Kevin Baptiste <kba@odoo.com>

addons/hr_holidays/models/hr_leave_type.py

@@ -432,7 +432,15 @@ class HolidaysType(models.Model):
     def _get_days_request(self):
         self.ensure_one()
         result = self._get_employees_days_per_allocation(self.closest_allocation_to_expire.employee_id.ids)
-        closest_allocation_remaining = result[self.closest_allocation_to_expire.employee_id.id][self][self.closest_allocation_to_expire]['virtual_remaining_leaves']
+        closest_allocation_remaining = 0
+        if self.closest_allocation_to_expire:
+            # Shows the sum of allocation expiring on the same day as the closest to expire
+            employee_allocations = result[self.closest_allocation_to_expire.employee_id.id][self].items()
+            closest_allocation_remaining = sum(
+                res['virtual_remaining_leaves']
+                for alloc, res in employee_allocations
+                if alloc and alloc.date_to == self.closest_allocation_to_expire.date_to
+            )
         return (self.name, {
                 'remaining_leaves': ('%.2f' % self.remaining_leaves).rstrip('0').rstrip('.'),
                 'virtual_remaining_leaves': ('%.2f' % self.virtual_remaining_leaves).rstrip('0').rstrip('.'),