fix(configurator): widen Template dropdown in Add Variant strip

Reported 2026-05-20: the Template dropdown in the Part > Process
Composer's 'Add Variant from Template' row truncated long recipe
names to 4 characters ("Cher" instead of "Chemical Conversion …").
The hard-coded max-width: 280px was set before the curated template
catalog grew names like "Chemical Conversion — Iridite Type II Cl 3"
and "ENP-STEEL-BASIC — Standard Heavy Phos".

Fix: replace the rigid max-width with a flex sizing that gives the
dropdown room to grow:
  - min-width: 360px (full common recipe name fits)
  - flex: 1 1 360px  (grows to fill available space)
  - max-width: 560px (cap so it doesn't push the buttons off-screen)

Same flex pattern applied to the Variant label input (slightly
narrower min/max).

Also: pulled the entech-side version of fp_part_process_composer.xml
back into the local repo — local was stale (one 'Add Variant' button;
entech had the dual 'Add — Tree' / 'Add — Simple' buttons that
landed in an out-of-band edit).

Module: fusion_plating_configurator 19.0.21.5.0 → 19.0.21.5.1.

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': '19.0.21.5.0',
+    'version': '19.0.21.5.1',
     'category': 'Manufacturing/Plating',
     'summary': 'Quotation configurator with part catalog, coating configs, and formula-based pricing engine.',
     'description': """