Implemented.

- `hud*` objects are now excluded from flatten selection:
  - Checkbox is disabled + grayed out.
  - Checkbox clicks/changes are blocked by `disabled`.
  - Flatten selection filtering ignores `hud*` keys even if stale state exists.
  - [main.js](C:/Users/davidq/Documents/GitHub/HTML-JavaScript-Gaming/tools/Skin%20Editor/main.js:139)
  - [main.js](C:/Users/davidq/Documents/GitHub/HTML-JavaScript-Gaming/tools/Skin%20Editor/main.js:844)
  - [skinEditor.css](C:/Users/davidq/Documents/GitHub/HTML-JavaScript-Gaming/tools/Skin%20Editor/skinEditor.css:98)

- `Move Up/Down` row is now centered with bottom spacing:
  - [skinEditor.css](C:/Users/davidq/Documents/GitHub/HTML-JavaScript-Gaming/tools/Skin%20Editor/skinEditor.css:78)

Validation:
- `node --check tools/Skin Editor/main.js` passed.

Commit comment for the last 5 changes:
`skin-editor: improve flatten workflow and layering UX (palette hex labels, remove preview footer text, accurate pre/post flatten rendering, object order controls with layering-aware flatten, and disable hud* from flatten selection)`

Author: DavidQ

tools/Skin Editor/index.html

@@ -42,9 +42,9 @@
           <span id="skinEditorContextSource" class="skin-editor-chip">Source: n/a</span>
         </div>
         <section class="skin-editor-section skin-editor-section--shape-add">
-          <h4>Object Shape/Type</h4>
+          <h4>Object</h4>
           <div class="skin-editor-shape-add-row">
-            <label for="skinEditorNewShapeType">Object Shape/Type</label>
+            <label for="skinEditorNewShapeType">Shape/Type</label>
             <select id="skinEditorNewShapeType" class="skin-editor-field">
               <option value="circle">Circle</option>
               <option value="oval">Oval</option>
@@ -76,6 +76,10 @@ <h4>Object Shape/Type</h4>
         </section>
         <h3>Objects</h3>
         <div id="skinEditorObjectList" class="skin-editor-object-list" role="listbox" aria-label="Skin objects"></div>
+        <div class="debug-tool-actions skin-editor-object-order-actions">
+          <button type="button" id="skinEditorMoveObjectUpButton" class="debug-tool-control">Move Up</button>
+          <button type="button" id="skinEditorMoveObjectDownButton" class="debug-tool-control">Move Down</button>
+        </div>
       </aside>
 
       <section class="panel debug-tool-panel skin-editor-canvas-panel">