feat(plating): tree editor — move up/down buttons + import from recipe

Two gaps closed on the recipe tree editor based on user feedback:

1. Explicit Move Up / Move Down buttons on every non-recipe node
   row, driven by a new POST /fp/recipe/node/move_sibling endpoint.
   DnD already existed but couldn't reliably move a node above a
   sibling when the drop zone overlapped the node being dragged.
   The button-based flow sidesteps that entirely and makes "nudge
   one slot" a single click.

2. Inline "Import from recipe" toolbar that appears when the
   Import button is clicked in the header. User picks a source
   recipe from a dropdown (POST /fp/recipe/list, excludes the
   current one), toggles "Skip duplicate names", and clicks
   Import. POST /fp/recipe/node/import_children deep-copies every
   top-level child of the source under the current recipe,
   preserving the sub-tree structure. Dedupe is on by default so
   re-running the import on an already-populated recipe is a
   no-op; users who want to merge identical-named branches can
   untick the checkbox.

Controller endpoints:
- /fp/recipe/list (list recipe roots for the picker)
- /fp/recipe/node/move_sibling (swap with neighbour by direction)
- /fp/recipe/node/import_children (deep-copy subtree with dedupe)

Smoke verified on entech: 5-child recipe imported cleanly, dedupe
blocks re-import, sequence swap works.

fusion_plating → 19.0.7.0.0

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': '19.0.6.2.0',
+    'version': '19.0.7.0.0',
     'category': 'Manufacturing/Plating',
     'summary': 'Core plating / metal finishing ERP: facilities, processes, tanks, baths, jobs, operators.',
     'description': """