Improve enterprise tier child tenants access

frontend/src/api/client/apiClient.ts

@@ -360,7 +360,11 @@ class ApiClient {
   }
 
   setTenantId(tenantId: string | null) {
+    console.log('🔧 [API Client] setTenantId called with:', tenantId);
+    console.log('🔧 [API Client] Previous tenantId was:', this.tenantId);
+    console.trace('📍 [API Client] setTenantId call stack:');
     this.tenantId = tenantId;
+    console.log('✅ [API Client] tenantId is now:', this.tenantId);
   }
 
   setDemoSessionId(sessionId: string | null) {

frontend/src/api/hooks/usePremises.ts

@@ -0,0 +1,79 @@
+/**
+ * Hook for premises (child tenants) management
+ */
+
+import { useQuery, UseQueryResult } from '@tanstack/react-query';
+import { tenantService } from '../services/tenant';
+import type { TenantResponse } from '../types/tenant';
+
+export interface PremisesFilters {
+  search?: string;
+  status?: 'active' | 'inactive' | '';
+}
+
+export interface PremisesStats {
+  total: number;
+  active: number;
+  inactive: number;
+}
+
+/**
+ * Get all child tenants (premises) for a parent tenant
+ */
+export const usePremises = (
+  parentTenantId: string,
+  filters?: PremisesFilters,
+  options?: { enabled?: boolean }
+): UseQueryResult<TenantResponse[]> => {
+  return useQuery({
+    queryKey: ['premises', parentTenantId, filters],
+    queryFn: async () => {
+      const response = await tenantService.getChildTenants(parentTenantId);
+
+      let filtered = response;
+
+      // Apply search filter
+      if (filters?.search) {
+        const searchLower = filters.search.toLowerCase();
+        filtered = filtered.filter(tenant =>
+          tenant.name.toLowerCase().includes(searchLower) ||
+          tenant.city?.toLowerCase().includes(searchLower)
+        );
+      }
+
+      // Apply status filter
+      if (filters?.status === 'active') {
+        filtered = filtered.filter(tenant => tenant.is_active);
+      } else if (filters?.status === 'inactive') {
+        filtered = filtered.filter(tenant => !tenant.is_active);
+      }
+
+      return filtered;
+    },
+    staleTime: 60000, // 1 min cache
+    enabled: (options?.enabled ?? true) && !!parentTenantId,
+  });
+};
+
+/**
+ * Get premises statistics
+ */
+export const usePremisesStats = (
+  parentTenantId: string,
+  options?: { enabled?: boolean }
+): UseQueryResult<PremisesStats> => {
+  return useQuery({
+    queryKey: ['premises', 'stats', parentTenantId],
+    queryFn: async () => {
+      const response = await tenantService.getChildTenants(parentTenantId);
+
+      return {
+        total: response.length,
+        active: response.filter(t => t.is_active).length,
+        inactive: response.filter(t => !t.is_active).length,
+      };
+    },
+    staleTime: 60000,
+    enabled: (options?.enabled ?? true) && !!parentTenantId,
+  });
+};