fix(configurator): Process Composer tree-editor button polish

- Icon: fa-edit → fa-sitemap (pencil suggests inline editing; the
  button actually navigates to a separate tree editor — sitemap
  matches the intent).
- Icon spacing: swap the fragile leading-space-in-span for the
  Bootstrap me-2 utility so the icon-to-text gap is consistent.
- Label: "Open Tree Editor" → "Open Process Editor" to match the
  page title ("Process Composer") and the menu vocabulary the rest
  of the product uses.

fusion_plating_configurator → 19.0.12.2.0

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating_configurator/__manifest__.py

@@ -5,7 +5,7 @@
 
 {
     'name': 'Fusion Plating — Configurator',
-    'version': '19.0.12.1.0',
+    'version': '19.0.12.2.0',
     'category': 'Manufacturing/Plating',
     'summary': 'Quotation configurator with part catalog, coating configs, and formula-based pricing engine.',
     'description': """

fusion_plating/fusion_plating_configurator/static/src/xml/fp_part_process_composer.xml

@@ -68,8 +68,8 @@
                             the process nodes.</p>
                             <button class="btn btn-primary"
                                     t-on-click="() => this.openRecipeEditor()">
-                                <i class="fa fa-edit"/>
-                                <span> Open Tree Editor</span>
+                                <i class="fa fa-sitemap me-2"/>
+                                <span>Open Process Editor</span>
                             </button>
                         </div>
                     </t>