Move Sprockets manifest creation before model generators

The manifest.js must exist before any generate command boots Rails,
otherwise Rails 8 with Sprockets raises ManifestNeededError.

Author: Fivell

spec/support/rails_template.rb

@@ -1,3 +1,8 @@
+# Ensure Sprockets manifest exists (required by Rails 8+)
+FileUtils.mkdir_p("app/assets/config")
+File.write("app/assets/config/manifest.js",
+  "//= link_directory ../javascripts .js\n//= link_directory ../stylesheets .css\n")
+
 generate :model, 'author name:string{10}:uniq last_name:string birthday:date --force'
 generate :model, 'post title:string:uniq body:text author:references --force'
 
@@ -27,11 +32,6 @@
 
 $LOAD_PATH.unshift(File.join(File.dirname(__FILE__), '..', 'lib'))
 
-# Ensure Sprockets manifest exists (required by Rails 8+)
-FileUtils.mkdir_p("app/assets/config")
-File.write("app/assets/config/manifest.js",
-  "//= link_directory ../javascripts .js\n//= link_directory ../stylesheets .css\n")
-
 generate :'active_admin:install --skip-users'
 generate :'formtastic:install'