chore: session housekeeping — tank UX, plating menu defaults, WO label

- fusion_plating: tank field labels (Code → Tank Number, Tank → Tank Name)
  + state-control header buttons (Mark Empty/Filled/In Use/Draining/
  Maintenance/Out of Service) with chatter audit logging.
- fusion_plating_configurator: Plating app default landing screen = Sale
  Orders, while keeping menu name as 'Plating'.
- fusion_plating_jobs: SO smart-button label 'Plating Jobs' → 'WO'.

Already deployed and verified on entech earlier in the session.

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

fusion_plating/fusion_plating/models/fp_tank.py

@@ -22,12 +22,12 @@ class FpTank(models.Model):
     _order = 'facility_id, work_center_id, sequence, code'
 
     name = fields.Char(
-        string='Tank',
+        string='Tank Name',
         required=True,
         tracking=True,
     )
     code = fields.Char(
-        string='Code',
+        string='Tank Number',
         required=True,
         tracking=True,
         help='Short unique tank identifier (e.g. "T-01", "EN-A1").',
@@ -174,3 +174,30 @@ class FpTank(models.Model):
             if not vals.get('qr_code') and vals.get('code'):
                 vals['qr_code'] = f"FP-TANK:{vals['code']}"
         return super().create(vals_list)
+
+    # ----- State transition actions ---------------------------------------
+    def _set_state(self, new_state, message):
+        for rec in self:
+            old = dict(rec._fields['state'].selection).get(rec.state, rec.state)
+            new = dict(rec._fields['state'].selection).get(new_state, new_state)
+            rec.state = new_state
+            rec.message_post(body=f"{message} ({old} → {new}) by {self.env.user.name}")
+        return True
+
+    def action_set_empty(self):
+        return self._set_state('empty', 'Tank marked Empty')
+
+    def action_set_filled(self):
+        return self._set_state('filled', 'Tank marked Filled')
+
+    def action_set_in_use(self):
+        return self._set_state('in_use', 'Tank marked In Use')
+
+    def action_set_draining(self):
+        return self._set_state('draining', 'Tank marked Draining')
+
+    def action_set_maintenance(self):
+        return self._set_state('maintenance', 'Tank marked for Maintenance')
+
+    def action_set_out_of_service(self):
+        return self._set_state('out_of_service', 'Tank marked Out of Service')