fusion_plating: add process recipe system with OWL tree editor (v19.0.2.0.0)

New model fusion.plating.process.node with _parent_store hierarchy for
defining reusable plating recipes. Node types: recipe, sub_process,
operation, step. Includes companion model for operator input definitions.

Full OWL tree editor (client action) with:
- Hierarchical tree with connector lines and type-coloured borders
- Click-to-edit side panel with save
- Add/delete child nodes inline
- Drag & drop reorder and reparent
- Theme-aware SCSS (light + dark mode)
- Demo data: Electroless Nickel Plating — Steel Line (30+ nodes)

Backend: 7 JSON-RPC endpoints for tree CRUD, reorder, move, duplicate.
Security: 3-tier ACL (operator read / supervisor write / manager full).
Menu: Process Recipes under Plating > Operations.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

fusion-plating/fusion_plating/__manifest__.py

@@ -89,15 +89,20 @@ Copyright (c) 2026 Nexa Systems Inc. All rights reserved.
         'views/fp_bath_log_views.xml',
         'views/fp_facility_views.xml',
         'views/fp_bath_views.xml',
+        'views/fp_process_node_views.xml',
         'views/fp_menu.xml',
     ],
     'assets': {
         'web.assets_backend': [
             'fusion_plating/static/src/scss/fusion_plating.scss',
+            'fusion_plating/static/src/scss/recipe_tree_editor.scss',
+            'fusion_plating/static/src/xml/recipe_tree_editor.xml',
+            'fusion_plating/static/src/js/recipe_tree_editor.js',
         ],
     },
     'demo': [
         'data/fp_demo_data.xml',
+        'data/fp_demo_recipe_data.xml',
     ],
     'images': ['static/description/icon.png'],
     'installable': True,