Add version display to settings modal

Display the FleetCode version at the bottom of the settings modal to help users identify which version they're running.

Author: built-by-as

index.html

@@ -247,6 +247,10 @@ <h2 class="modal-title">Terminal Settings</h2>
           <span class="text-xs text-gray-400 mt-1 block">Directory where session worktrees will be stored</span>
         </div>
 
+        <div class="text-center text-xs text-gray-500 mt-6 pt-4 border-t border-gray-700">
+          <span id="app-version">FleetCode v1.0.1-beta.7</span>
+        </div>
+
         <div class="btn-group">
           <button id="cancel-settings" class="btn-secondary">Cancel</button>
           <button id="reset-settings" class="btn-secondary">Reset to Default</button>