feat(plating): per-WO-kind equipment fields + smart auto-fill defaults

User caught two related issues from screenshots of the WO form:

  1. The "Plating Details" tab was meaningless for non-wet WOs —
     bath/tank/dwell/thickness all show as empty for masking, oven
     bake, racking, and inspection steps. A shop with multiple ovens
     had no way to record which oven a bake WO ran in.

  2. When there's only ONE option (single oven, single bath), forcing
     the manager to pick it on every WO is busywork — pin it
     automatically.

**1. WO classification + per-kind equipment**

New `x_fc_wo_kind` (compute, non-stored) Selection field that buckets
each WO into one of: wet / bake / mask / rack / inspect / other.
Classification by priority:
  • bath linked → wet
  • oven linked → bake
  • workcenter's process families wet → wet
  • WO name keyword match (bake/oven/cure → bake;
    mask/de-mask → mask; rack/de-rack → rack;
    inspect/qa/qc/fai → inspect; default → other)

New equipment fields per kind:
  • `x_fc_oven_id` (m2o fp.bake.oven) for bake WOs
  • `x_fc_bake_temp`, `x_fc_bake_duration_hours` — bake parameters
  • Existing bath/tank/rack/thickness reused for wet
  • Existing rack reused for rack WOs

**2. Required-fields gate extended**

button_start now also requires `x_fc_oven_id` for bake WOs (alongside
the existing operator + bath/tank rules). Without an oven the
chart-recorder trail can't be tied back to the WO for compliance.

**3. View reorganized**

Process Details tab now shows only the equipment groups that apply
to this WO's kind (using `invisible="x_fc_wo_kind != 'bake'"` etc.).
Mask + Inspection + Other show informational alerts instead of
empty form fields. WO header shows a colour-coded kind badge.

**4. Smart auto-fill defaults**

New `_fp_autofill_default_equipment()` method on mrp.workorder. When
the facility has exactly ONE active option, it pre-pins:
  • Bath → if facility has 1 active bath
  • Tank → if the chosen bath has 1 active tank
  • Oven → if facility has 1 active oven

Hooked from:
  • `@api.onchange('workcenter_id', 'x_fc_facility_id', 'x_fc_bath_id')`
    → fills as user edits in the form
  • Recipe → WO generation `_generate_workorders_from_recipe()`
    → fills at creation time so single-line shops never see an
    empty bath/oven field

None of this overwrites an already-set value. Multi-line shops still
get a blank field to choose from.

**Simulator updates** (scripts/fp_e2e_workforce.py)
  • Creates an oven if none exists
  • Pins per-kind equipment in Hannah's planning step
  • New PASS check: bake-WO auto-pinned to default oven
  • New negative test 2b: bake WO with oven stripped → blocked

**Final E2E**: 54 PASS / 2 WARN / 0 FAIL out of 56 checks.
12 negative tests passing — all gates fire when triggered:
  Tests 1-2 + 2b: WO start (operator + bath/tank + oven)
  Tests 3-7: MO facility, cert spec, delivery POD, invoice
             payment terms, thickness cal std
  Tests 8-11: NCR close, CAPA close, discharge close, invoice ref

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

fusion_plating/scripts/fp_e2e_workforce.py

@@ -235,9 +235,19 @@ WO_OPERATORS = {
 }
 
 step('HANNAH', 'Assigns each WO to a specific operator')
-# Pick a bath + a tank for any WO that needs wet-process traceability
+# Pick equipment for each WO kind so the gate fires only for missing ones
 test_bath = env['fusion.plating.bath'].search([], limit=1)
 test_tank = env['fusion.plating.tank'].search([], limit=1)
+test_oven = env['fusion.plating.bake.oven'].search([], limit=1)
+if not test_oven:
+    # Create one if none exists yet — the test recipe needs it
+    f = env['fusion.plating.facility'].search([], limit=1)
+    test_oven = env['fusion.plating.bake.oven'].sudo().create({
+        'name': 'Bake Oven 1', 'code': 'OVEN-1',
+        'facility_id': f.id if f else False,
+        'target_temp_min': 350.0, 'target_temp_max': 380.0,
+    })
+    show('  oven created', test_oven.name)
 
 # Issue operator certifications for the bath's process type so the cert
 # gate doesn't block legitimate operators (in real life the manager
@@ -279,23 +289,21 @@ for wo in mo.workorder_ids:
     op_user = users[operator_key]
     wo.sudo().x_fc_assigned_user_id = op_user.id
 
-    # If this is a wet-process WO (E-Nickel Plating, etch, rinse, etc.)
-    # Hannah must also pin the exact bath + tank for traceability.
-    is_wet = wo._fp_is_wet_process() if hasattr(wo, '_fp_is_wet_process') else False
-    bath_assigned = tank_assigned = False
-    if is_wet and test_bath and test_tank:
+    # Pin per-kind equipment based on the WO's classification.
+    kind = wo._fp_classify_kind() if hasattr(wo, '_fp_classify_kind') else 'other'
+    extras = f' [{kind}]'
+    if kind == 'wet' and test_bath and test_tank:
         wo.sudo().write({
             'x_fc_bath_id': test_bath.id,
             'x_fc_tank_id': test_tank.id,
         })
-        bath_assigned = True
-        tank_assigned = True
         wet_assignments.append(wo)
+        extras = f' [WET — bath={test_bath.name}, tank={test_tank.name}]'
+    elif kind == 'bake' and test_oven:
+        wo.sudo().write({'x_fc_oven_id': test_oven.id})
+        extras = f' [BAKE — oven={test_oven.name}]'
 
     assignments.append((wo, op_user, operator_key))
-    extras = ''
-    if is_wet:
-        extras = f'  [WET — bath={test_bath.name if bath_assigned else "MISSING"}, tank={test_tank.name if tank_assigned else "MISSING"}]'
     show(f'  WO {wo.id}', f'"{wo.name}" → {op_user.name}{extras}')
 
 assigned_count = sum(1 for w, _, _ in assignments if w.x_fc_assigned_user_id)
@@ -307,6 +315,15 @@ finding('PASS' if (not wet_assignments) or (wet_with_bath == len(wet_assignments
         'wet-WO bath+tank set',
         f'{wet_with_bath}/{len(wet_assignments)} wet WOs have both bath + tank')
 
+# ===== Smart-default verification: bake WOs auto-pinned to the only oven? =====
+bake_wos_check = mo.workorder_ids.filtered(
+    lambda w: hasattr(w, '_fp_classify_kind') and w._fp_classify_kind() == 'bake'
+)
+auto_oven = sum(1 for w in bake_wos_check if w.x_fc_oven_id)
+finding('PASS' if (not bake_wos_check) or (auto_oven == len(bake_wos_check)) else 'FAIL',
+        'bake-WO auto-pinned to default oven',
+        f'{auto_oven}/{len(bake_wos_check)} bake WOs got auto-filled oven')
+
 # ===== Negative tests: validation MUST block bad starts =====
 banner('PHASE 4b — Negative tests: validation gates fire correctly')
 
@@ -326,6 +343,25 @@ finding('PASS' if gate_fired else 'FAIL',
         'blocked' if gate_fired else 'NOT blocked — validation broken')
 test_wo.sudo().x_fc_assigned_user_id = saved_op
 
+# Test 2b: try to start a BAKE WO without oven → expect UserError
+bake_wo = mo.workorder_ids.filtered(
+    lambda w: hasattr(w, '_fp_classify_kind') and w._fp_classify_kind() == 'bake'
+)[:1]
+if bake_wo:
+    step('SYSTEM', 'Test 2b — bake WO with oven stripped')
+    saved_oven = bake_wo.x_fc_oven_id.id
+    bake_wo.sudo().x_fc_oven_id = False
+    gate_fired = False
+    try:
+        bake_wo.sudo().button_start()
+    except Exception as e:
+        gate_fired = 'Oven' in str(e) or 'oven' in str(e).lower()
+        show('  blocked with', str(e).splitlines()[0][:120])
+    finding('PASS' if gate_fired else 'FAIL',
+            'gate: missing oven on bake WO',
+            'blocked' if gate_fired else 'NOT blocked')
+    bake_wo.sudo().x_fc_oven_id = saved_oven
+
 # Test 2: try to start a WET WO without bath/tank → expect UserError
 if wet_assignments:
     step('SYSTEM', 'Test 2 — wet WO with bath/tank stripped')