fix(plating): tree editor — title wrapping + import hierarchy

Two bugs reported on the tree editor after the move/import feature
shipped:

1. Card titles truncated to "Contrac…" because .o_fp_re_title had
   white-space: nowrap + text-overflow: ellipsis. Swapped to
   white-space: normal + overflow-wrap: anywhere so long names
   wrap onto multiple lines inside the card. Widened card max-
   width 380→460px and bumped min-width 240→260px so wrapped
   titles have room.

2. Import-children was flattening the tree — all operations AND
   their step children landed at the top level instead of staying
   nested under their operations.

   Root cause: src_node.copy({'parent_id': new_parent.id, ...})
   on a _parent_store model behaved unpredictably — in some runs
   the override in copy_vals didn't stick and child recursion
   ended up with a wrong parent_id. Rewrote _copy_subtree to use
   copy_data() + Node.create() so parent_id is set explicitly and
   child_ids / parent_path are stripped (we recurse ourselves).

   Smoke verified on entech: General Processing (1 root + 5 ops
   + 7 steps = 13 nodes) imports with hierarchy bit-identical to
   source.

fusion_plating → 19.0.7.1.0

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': '19.0.7.0.0',
+    'version': '19.0.7.1.0',
     'category': 'Manufacturing/Plating',
     'summary': 'Core plating / metal finishing ERP: facilities, processes, tanks, baths, jobs, operators.',
     'description': """