fix: resolve remaining PHPCS errors — array formatting and closing brace

Fix multi-item associative array on single line in class-psa-admin.php
(line 273) and remove blank line before closing class brace in
class-psa-ai-generator.php (line 540).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

includes/class-psa-ai-generator.php

@@ -536,5 +536,4 @@ Important:
 - For the "category" field, use EXACTLY one of the eight listed categories.
 PROMPT;
 	}
-
 }