fix(plating): Process Composer/Editor breadcrumb accumulation

Two separate issues were stacking up on the breadcrumb trail:

1. The composer was launching the tree editor with the name
   "Process Composer — …" — identical to its own label. The
   breadcrumb trail ended up showing "Process Composer / Process
   Composer" because both pages claimed the same name. Renamed the
   tree-editor instance to "Process Editor — …" so the two pages
   read distinctly.

2. Every "Back to part" click pushed a new entry onto the
   breadcrumb stack instead of resetting. After one round-trip the
   trail looked like "… / Composer / Editor / Part"; after two it
   was "… / Composer / Editor / Part / Composer / Editor / Part".
   Added clearBreadcrumbs: true to both back paths (composer's
   backToPart and tree-editor's onBackToList) so a RETURN action
   actually resets the stack.

fusion_plating → 19.0.6.2.0
fusion_plating_configurator → 19.0.12.4.0

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

fusion_plating/fusion_plating/__manifest__.py

@@ -5,7 +5,7 @@
 
 {
     'name': 'Fusion Plating',
-    'version': '19.0.6.1.0',
+    'version': '19.0.6.2.0',
     'category': 'Manufacturing/Plating',
     'summary': 'Core plating / metal finishing ERP: facilities, processes, tanks, baths, jobs, operators.',
     'description': """