fix: resolve super_admin privileges and tenant management issues

- Fixed real backend deletion for tenants

- Allowed super_admins to manage other super_admins in Global Users

- Filtered teams based on selected tenant in user creation

- Protected system tenant from deletion

services/dataService.ts

@@ -248,6 +248,33 @@ export const createTenant = async (tenantData: any): Promise<boolean> => {
   }
 };
 
+export const updateTenant = async (id: string, tenantData: any): Promise<boolean> => {
+  try {
+    const response = await fetch(`${API_URL}/tenants/${id}`, {
+      method: 'PUT',
+      headers: getHeaders(),
+      body: JSON.stringify(tenantData)
+    });
+    return response.ok;
+  } catch (error) {
+    console.error("API Error (updateTenant):", error);
+    return false;
+  }
+};
+
+export const deleteTenant = async (id: string): Promise<boolean> => {
+  try {
+    const response = await fetch(`${API_URL}/tenants/${id}`, {
+      method: 'DELETE',
+      headers: getHeaders()
+    });
+    return response.ok;
+  } catch (error) {
+    console.error("API Error (deleteTenant):", error);
+    return false;
+  }
+};
+
 // --- Auth Functions ---
 
 export const logout = () => {