fix(next-utils): finalize type safety for validateMintelEnv and fix pre-push hook

packages/next-utils/src/env.ts

@@ -52,7 +52,9 @@ export const mintelEnvSchema = {
 
 export function validateMintelEnv<
   T extends z.ZodRawShape = Record<string, never>,
->(schemaExtension: T = {} as T) {
+>(
+  schemaExtension: T = {} as T,
+): z.infer<z.ZodObject<typeof mintelEnvSchema & T>> {
   const fullSchema = z.object(mintelEnvSchema).extend(schemaExtension);
 
   const isBuildTime =
@@ -66,7 +68,7 @@ export function validateMintelEnv<
       console.warn(
         "⚠️ Some environment variables are missing during build, but skipping strict validation.",
       );
-      // Return process.env casted to the full schema type to unblock builds
+      // Return process.env casted to ensure types match for the full schema
       return process.env as unknown as z.infer<typeof fullSchema>;
     }
 
@@ -77,5 +79,5 @@ export function validateMintelEnv<
     throw new Error("Invalid environment variables");
   }
 
-  return result.data;
+  return result.data as z.infer<typeof fullSchema>;
 }