refactor: standardize env and directus logic using enhanced @mintel/next-utils

lib/env.ts

@@ -3,20 +3,20 @@ import { validateMintelEnv, mintelEnvSchema } from '@mintel/next-utils';
 
 /**
  * Environment variable schema.
- * Extends the default Mintel environment schema.
+ * Extends the default Mintel environment schema which already includes:
+ * - Directus (URL, TOKEN, INTERNAL_URL, etc.)
+ * - Mail (HOST, PORT, etc.)
+ * - Gotify
+ * - Logging
+ * - Analytics
  */
 export const envSchema = z.object({
   ...mintelEnvSchema,
-  // Project specific variables
-  NEXT_PUBLIC_TARGET: z.enum(['development', 'testing', 'staging', 'production']).optional(),
-  TARGET: z.enum(['development', 'testing', 'staging', 'production']).optional(),
 
-  // Directus (Extended from base)
-  INTERNAL_DIRECTUS_URL: z.string().url().optional(),
-  INFRA_DIRECTUS_URL: z.string().url().optional(),
-  INFRA_DIRECTUS_TOKEN: z.string().optional(),
+  // Project specific overrides or additions
+  AUTH_COOKIE_NAME: z.string().default('klz_gatekeeper_session'),
 
-  // Gatekeeper
+  // Gatekeeper specifics not in base
   GATEKEEPER_URL: z.string().url().default('http://gatekeeper:3000'),
   GATEKEEPER_BYPASS_ENABLED: z.preprocess(
     (val) => val === 'true' || val === true,
@@ -26,6 +26,9 @@ export const envSchema = z.object({
     (val) => val === 'true' || val === true,
     z.boolean().default(false),
   ),
+
+  INFRA_DIRECTUS_URL: z.string().url().optional(),
+  INFRA_DIRECTUS_TOKEN: z.string().optional(),
 });
 
 /**