Add kilometer-based Fahrtkosten billing, self-service distance entry, role deletion

- Facility: TravelCostMode (Pauschale/ProKilometer) + TravelCostPerKm, alongside
  the existing flat rate; fixes FacilityService.UpdateAsync silently dropping all
  Konditionen fields on update.
- New EmployeeFacilityDistance (Mitarbeiter x Einrichtung -> km) with full
  office-side CRUD in omsorgapp, plus a self-service endpoint/UI so field staff
  can maintain their own commute distance via OMSORG Connect (new
  ModuleType.EmployeeFacilityDistances, Own-scope, no Facilities access needed).
- Roles can now be deleted (blocked with a 409 while still assigned to a user).
- Fix employeesApi.js missing the Date-object conversion for dateOfBirth/entryDate/
  exitDate that crashed employee creation whenever a date was filled in; add a
  clear/remove control for those date fields.
- Requirements: flesh out FR-REC-3 with a staged Akquise cadence, add FR-REC-5/6
  for CRM feature scope and success metrics.
- Regenerate api-client-ts and api-client-php for all of the above.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

omsorgapp/src/style.css

@@ -931,6 +931,16 @@ button.omsorg-button--danger {
   gap: 12px;
 }
 
+.input-with-action {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.input-with-action input {
+  flex: 1;
+}
+
 .form-error {
   grid-column: 1 / -1;
 }
@@ -1788,6 +1798,21 @@ button.omsorg-button--danger {
   border-color: var(--omsorg-primary, currentColor);
 }
 
+.settings-role-item-row {
+  display: flex;
+  align-items: stretch;
+  gap: 6px;
+}
+
+.settings-role-item-row .settings-role-item {
+  flex: 1;
+  min-width: 0;
+}
+
+.settings-role-item-row .omsorg-button span:empty {
+  display: none;
+}
+
 .settings-new-role-form {
   display: flex;
   gap: 8px;