<ul><li>CRITICAL FIX: checkpdflink() - added is_array() guard; get_headers() returning false caused Fatal TypeError crashing page</li><li>LOGIC FIX: getembedcode() - corrected always-true OR condition to AND; pdf check was bypassed entirely</li><li>DISPLAY ERRORS OFF: inc_newsfeed_manager.php - display_errors 1 to 0, stops PHP warnings leaking into HTML output</li><li>JS FIX: hmtl+= typo corrected to html+= (reply-to-reply header broken)</li><li>JS FIX: comment.likes.lenght corrected to .length (like count showed undefined)</li><li>JS FIX: comment.comment_replies.lenght corrected to .length (reply section never rendered)</li><li>JS FIX: span missing closing > before reply content (content rendered as attribute value)</li><li>JS FIX: stray quote after JS comment causing string parse error</li><li>JS FIX: 4x undifined typo corrected to undefined in typeof checks</li><li>JS FIX: Added error handlers to 8 AJAX calls preventing swal stuck open on network failure</li><li>SPEED FIX N+1: static cache added to identifyIfUserOrCompany() - saves 50-100+ redundant DB queries per page load</li><li>SPEED FIX N+1: static cache added to get_post_likers(), get_postType_ById(), get_moduleIcon()</li><li>CRUD TESTED: Create, Read, Update, Delete, Like post, Comment, Like comment all confirmed working</li></ul>