fix(config): agrega roles Taller y Mecanico en creacion de empleados

- Agrega opciones workshop y mechanic al select de rol en config.html
- Actualiza ROLE_LABELS y ROLE_BADGE en config.js
- Valida roles mechanic y workshop en config_bp.py con permisos por defecto
- Añade clases CSS badge--orange y badge--teal

Tests: 35 passed

pos/static/css/config.css

@@ -1186,6 +1186,8 @@
     .badge--green    { background: rgba(34,197,94,0.15);  color: var(--color-success); }
     .badge--yellow   { background: rgba(234,179,8,0.15);  color: #eab308; }
     .badge--purple   { background: rgba(168,85,247,0.15); color: #a855f7; }
+    .badge--orange   { background: rgba(249,115,22,0.15); color: #f97316; }
+    .badge--teal     { background: rgba(20,184,166,0.15); color: #14b8a6; }
 
     /* Toast notification */
     .cfg-toast {

pos/static/js/config.js

@@ -106,7 +106,9 @@ const Config = (() => {
         admin: 'Admin',
         cashier: 'Cajero',
         warehouse: 'Almacenista',
-        accountant: 'Contador'
+        accountant: 'Contador',
+        workshop: 'Taller',
+        mechanic: 'Mecanico'
     };
 
     var ROLE_BADGE = {
@@ -114,7 +116,9 @@ const Config = (() => {
         admin: 'badge--blue',
         cashier: 'badge--green',
         warehouse: 'badge--yellow',
-        accountant: 'badge--purple'
+        accountant: 'badge--purple',
+        workshop: 'badge--orange',
+        mechanic: 'badge--teal'
     };
 
     function roleBadge(role) {