Release v1.6.0 - Audit System Cross-Tenant Viewing

Features:
- ✅ Cross-tenant audit log viewing for ADMIN/SUPPORT_MANAGER
- ✅ New 'all_tenants' parameter in audit endpoints
- ✅ Frontend toggle to view all clients' logs
- ✅ Multi-tenant stats support in /audit/stats
- ✅ Fixed timezone issue with date filters (UTC consistency)
- ✅ Fixed date_to filter overlap causing duplicate records

Changes:
- backend/app/api/v1/endpoints/audit.py:
  * Added tenant_id and all_tenants query parameters
  * Permission checks for cross-tenant viewing
  * Dynamic tenant filtering based on user role
  * Fixed date_to filter (removed +1 day overlap)
  * Updated all stats queries for multi-tenant support

- frontend-internal/src/routes/audit/+page.svelte:
  * Import auth store for role detection
  * Added 'Ver todos los clientes' toggle for admins
  * Pass all_tenants parameter to API calls
  * UI badge indicating multi-tenant mode

- Version bump: 1.5.1.2 → 1.6.0 across all packages

frontend-internal/src/routes/audit/+page.svelte

@@ -2,6 +2,7 @@
   import { onMount } from 'svelte';
   import { api } from '$lib/utils/api';
   import { toast } from '$lib/stores/toast';
+  import { auth } from '$lib/stores/auth';
   import Modal from '$lib/components/Modal.svelte';
 
   // Estado de carga y datos
@@ -24,6 +25,9 @@
   let filterResourceType = '';
   let searchText = '';
   
+  // Filtro multi-tenant (solo para ADMIN/SUPPORT_MANAGER)
+  let allTenants = false;
+  
   // Filtro de período
   let periodFilter: 'today' | 'yesterday' | 'last7days' | 'last30days' | 'custom' = 'today';
   let customDateFrom = '';
@@ -32,6 +36,10 @@
   // Control de visibilidad de filtros avanzados
   let showAdvancedFilters = false;
 
+  // Usuario actual
+  $: currentUser = $auth.user;
+  $: canSeeAllTenants = currentUser && (currentUser.role === 'ADMIN' || currentUser.role === 'SUPPORT_MANAGER');
+
   // Contador de filtros activos (excluyendo el período que es por defecto)
   $: activeFiltersCount = [filterUserId, filterAction, filterResourceType, searchText].filter(f => f && f.trim()).length;
 
@@ -108,7 +116,11 @@
    */
   async function loadStats() {
     try {
-      stats = await api.get('/audit/stats');
+      const params: any = {};
+      if (allTenants && canSeeAllTenants) {
+        params.all_tenants = true;
+      }
+      stats = await api.get('/audit/stats', params);
     } catch (e) {
       console.error('Error cargando estadísticas:', e);
     }
@@ -135,6 +147,11 @@
       if (filterAction) params.action = filterAction;
       if (filterResourceType) params.resource_type = filterResourceType;
       if (searchText) params.search = searchText;
+      
+      // Aplicar filtro multi-tenant si el usuario tiene permiso
+      if (allTenants && canSeeAllTenants) {
+        params.all_tenants = true;
+      }
 
       const response = await api.get('/audit/', params);
       
@@ -412,6 +429,41 @@
     {/if}
   </div>
 
+  <!-- Filtro Multi-Tenant (solo para ADMIN/SUPPORT_MANAGER) -->
+  {#if canSeeAllTenants}
+    <div class="bg-white shadow rounded-lg p-4 mb-6">
+      <div class="flex items-center justify-between">
+        <div class="flex items-center">
+          <label for="all-tenants-toggle" class="flex items-center cursor-pointer">
+            <input
+              type="checkbox"
+              id="all-tenants-toggle"
+              bind:checked={allTenants}
+              on:change={() => { 
+                currentPage = 1;
+                loadLogs(); 
+                loadStats();
+              }}
+              class="rounded border-gray-300 text-primary-600 shadow-sm focus:border-primary-500 focus:ring-primary-500 h-4 w-4 mr-3"
+            />
+            <div>
+              <span class="text-sm font-medium text-gray-900">Ver todos los clientes</span>
+              <p class="text-xs text-gray-500">Mostrar registros de auditoría de todas las organizaciones</p>
+            </div>
+         </label>
+        </div>
+        {#if allTenants}
+          <span class="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-purple-100 text-purple-800">
+            <svg class="w-3 h-3 mr-1" fill="currentColor" viewBox="0 0 20 20">
+              <path d="M10 2a8 8 0 100 16 8 8 0 000-16zM9 9a1 1 0 012 0v4a1 1 0 11-2 0V9zm1-5a1 1 0 100 2 1 1 0 000-2z" />
+            </svg>
+            Multi-tenant activo
+          </span>
+        {/if}
+      </div>
+    </div>
+  {/if}
+
   <!-- Estadísticas Rápidas -->
   {#if stats}
     <div class="grid grid-cols-2 md:grid-cols-4 gap-4 mb-6">