Add Lock on Close feature documentation

Author: seanieb

images/Lock-On-Close-Preference.png

@@ -64,6 +64,11 @@ <h3>Keyboard Shortcut</h3>
                         <h3>Password Only</h3>
                         <p>Touch ID won't work until you unlock with password</p>
                     </div>
+                    <div class="feature-card">
+                        <div class="feature-icon">💻</div>
+                        <h3>Lock on Close</h3>
+                        <p>Enable in settings to require password when you close your lid</p>
+                    </div>
                 </div>
             </div>
         </section>
@@ -82,10 +87,10 @@ <h3>Lives in Your Menu Bar</h3>
                     </div>
                     <div class="screenshot-card">
                         <div class="screenshot-frame">
-                            <img src="images/preferences.png" alt="PanicLock preferences" class="screenshot-image">
+                            <img src="images/Lock-On-Close-Preference.png" alt="PanicLock preferences" class="screenshot-image">
                         </div>
-                        <h3>Customizable Shortcut</h3>
-                        <p>Set your own global keyboard hotkey</p>
+                        <h3>Customizable Preferences</h3>
+                        <p>Set shortcuts, appearance, and behavior options</p>
                     </div>
                     <div class="screenshot-card">
                         <div class="screenshot-frame">