feat(config): allow admin/owner to delete branches

- Added DELETE /pos/api/config/branches/<id> that soft-deletes the branch (is_active=false).

- Restricted to owner/admin; main branch cannot be deleted.

- Added 'Eliminar' button in the branches grid for admin/owner.

pos/static/js/config.js

@@ -4,6 +4,9 @@
 const Config = (() => {
     const API = '/pos/api/config';
 
+    const user = window.POS_USER || {};
+    const canDeleteBranch = (user.role === 'owner' || user.role === 'admin');
+
     // Cache for branches (used by employee modal selector)
     let _branches = [];
 
@@ -183,6 +186,7 @@ const Config = (() => {
                 + '</div>'
                 + '<div class="device-card__actions">'
                 + '<button class="btn btn--ghost btn--sm" onclick="Config.editBranch(' + b.id + ')">Editar</button>'
+                + (canDeleteBranch && b.is_active && !b.is_main ? '<button class="btn btn--danger btn--sm" style="margin-left:4px;" onclick="Config.deleteBranch(' + b.id + ')">Eliminar</button>' : '')
                 + '</div></div>';
         });
 
@@ -238,6 +242,22 @@ const Config = (() => {
         openBranchModal(b);
     }
 
+    async function deleteBranch(branchId) {
+        var b = _branches.find(function(x) { return x.id === branchId; });
+        if (!b) { toast('Sucursal no encontrada', 'error'); return; }
+        if (b.is_main) { toast('No se puede eliminar la sucursal principal', 'error'); return; }
+        if (!confirm('¿Eliminar la sucursal "' + b.name + '"? Se marcará como inactiva.')) return;
+        try {
+            var res = await fetch(API + '/branches/' + branchId, { method: 'DELETE', headers: headers() });
+            var json = await res.json().catch(function() { return {}; });
+            if (!res.ok) throw new Error(json.error || res.statusText);
+            toast('Sucursal eliminada');
+            loadBranches();
+        } catch (e) {
+            toast(e.message || 'Error al eliminar sucursal', 'error');
+        }
+    }
+
     async function saveBranch(data) {
         var branchId = document.getElementById('branch-id').value;
         var url = API + '/branches' + (branchId ? '/' + branchId : '');
@@ -1047,6 +1067,7 @@ const Config = (() => {
     return {
         init, setTheme, selectThemeOption, loadAllowedBrands, saveAllowedBrands,
         loadBranches, loadEmployees, saveBranch, saveEmployee, editEmployee, deleteEmployee,
+        deleteBranch,
         loadBusiness, saveBusiness, saveTaxParams, saveAll,
         loadCurrency, saveCurrency,
         loadVehicleCompatSource, saveVehicleCompatSource,