Adding new functionality

includes/class-twp-shortcodes.php

@@ -158,6 +158,10 @@ class TWP_Shortcodes {
                     <span class="hangup-icon">📞</span>
                     <span class="hangup-text">Hang Up</span>
                 </button>
+                <button id="twp-resume-btn" class="twp-btn twp-btn-warning" style="display: none;">
+                    <span class="resume-icon">▶️</span>
+                    <span class="resume-text">Resume Call</span>
+                </button>
             </div>
             
             <!-- Call Info -->