feat(plating): Phase 1 — plant-view kanban data model foundation

PV-T1: fp.work.centre.area_kind Selection (9 floor columns)
PV-T2: fp.job.step.area_kind compute + _STEP_KIND_TO_AREA fallback
       (covers all 30+ step kinds in the project library, plus the
       spec D4 rule that de_mask folds into de_racking)
PV-T3: fp.job.step.last_activity_at + write hook + message_post
       override + fp.job.step.move.create() hook + _fp_is_idle helper
PV-T4: res.users.paired_work_centre_ids M2M (single-station for MVP,
       forward-compatible for Phase 2 multi-station picker)
PV-T5: res.config.settings.x_fc_shopfloor_layout feature flag backed
       by ir.config_parameter for the landing-action resolver

Migrations:
  fusion_plating 19.0.21.0.0      — backfill area_kind from kind
  fusion_plating_jobs 19.0.10.24.0 — backfill last_activity_at

Deployed + verified on entech:
  - 9/9 fp.work.centre rows have area_kind set
  - 400/400 fp.job.step rows have area_kind + last_activity_at
  - paired_work_centre_ids M2M relation table created
  - All 271 modules loaded cleanly, registry rebuilt in 27s

Part of the 2026-05-23 Shop Floor plant-view kanban redesign.
Plan: docs/superpowers/plans/2026-05-23-shopfloor-plant-view-plan.md
Spec: docs/superpowers/specs/2026-05-23-shopfloor-plant-view-design.md

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

fusion_plating/fusion_plating_jobs/models/fp_job_step.py

@@ -17,6 +17,62 @@ from odoo.exceptions import UserError
 _logger = logging.getLogger(__name__)
 
 
+# Mapping from fp.process.node.default_kind → fp.work.centre.area_kind.
+# Used as fallback by fp.job.step.area_kind compute when the step has no
+# work_centre_id or its work_centre has no area_kind set. Authoritative
+# source per the plant-view spec §4.2.
+# 2026-05-23 — Shop Floor plant-view redesign.
+_STEP_KIND_TO_AREA = {
+    # Receiving (admin / pre-physical-work)
+    'receiving':            'receiving',
+    'incoming_inspection':  'receiving',
+    'contract_review':      'receiving',
+    'gating':               'receiving',
+    'ready_for_processing': 'receiving',
+    # Masking
+    'masking':              'masking',
+    # Blasting
+    'blasting':             'blasting',
+    'bead_blast':           'blasting',
+    'media_blast':          'blasting',
+    # Racking
+    'racking':              'racking',
+    # Plating (everything wet — rolled up into one column per spec D3)
+    'soak_clean':           'plating',
+    'electroclean':         'plating',
+    'acid_dip':             'plating',
+    'etch':                 'plating',
+    'desmut':               'plating',
+    'zincate':              'plating',
+    'rinse':                'plating',
+    'water_break_test':     'plating',
+    'activation':           'plating',
+    'e_nickel_plate':       'plating',
+    'chrome':               'plating',
+    'anodize':              'plating',
+    'black_oxide':          'plating',
+    'drying':               'plating',
+    # Baking
+    'bake':                 'baking',
+    'oven_bake':            'baking',
+    'post_bake_relief':     'baking',
+    # De-Racking (folds in de-masking per spec D4)
+    'de_rack':              'de_racking',
+    'de_mask':              'de_racking',
+    'unrack':               'de_racking',
+    # Final inspection (post-plate inspection / FAIR / thickness QC)
+    'inspection':           'inspection',
+    'final_inspection':     'inspection',
+    'post_plate_inspection':'inspection',
+    'thickness_qc':         'inspection',
+    'fair':                 'inspection',
+    'dimensional_check':    'inspection',
+    # Shipping
+    'shipping':             'shipping',
+    'pack_ship':            'shipping',
+}
+
+
 class FpJobStep(models.Model):
     _inherit = 'fp.job.step'
 
@@ -85,6 +141,73 @@ class FpJobStep(models.Model):
             )
             step.can_start = not bool(blocking)
 
+    # ===== 2026-05-23 plant-view redesign — area_kind + activity =========
+    area_kind = fields.Selection(
+        [
+            ('receiving',  'Receiving'),
+            ('masking',    'Masking'),
+            ('blasting',   'Blasting'),
+            ('racking',    'Racking'),
+            ('plating',    'Plating'),
+            ('baking',     'Baking'),
+            ('de_racking', 'De-Racking'),
+            ('inspection', 'Final inspection'),
+            ('shipping',   'Shipping'),
+        ],
+        string='Floor Column',
+        compute='_compute_area_kind',
+        store=True,
+        index=True,
+        help='Which Shop Floor column this step belongs to. Resolved as: '
+             '(1) work_centre.area_kind if set; else (2) fallback to '
+             '_STEP_KIND_TO_AREA[recipe_node.default_kind]; else (3) the '
+             'safe catch-all "plating". Drives plant-view kanban grouping.',
+    )
+
+    @api.depends('work_centre_id.area_kind', 'recipe_node_id.default_kind')
+    def _compute_area_kind(self):
+        for step in self:
+            if step.work_centre_id and step.work_centre_id.area_kind:
+                step.area_kind = step.work_centre_id.area_kind
+                continue
+            kind = step.recipe_node_id.default_kind if step.recipe_node_id else False
+            if kind and kind in _STEP_KIND_TO_AREA:
+                step.area_kind = _STEP_KIND_TO_AREA[kind]
+                continue
+            step.area_kind = 'plating'
+
+    last_activity_at = fields.Datetime(
+        string='Last Activity',
+        index=True,
+        help='Stamped on any state transition, move-out from this step, '
+             'or chatter post. Drives the S16 idle-warning card state '
+             '(in_progress with no activity for 8+ hours).',
+    )
+
+    def _fp_is_idle(self, threshold_hours=8):
+        """True when this step is in_progress AND last_activity_at is older
+        than `threshold_hours`. Drives the idle_warning card state."""
+        self.ensure_one()
+        if self.state != 'in_progress':
+            return False
+        if not self.last_activity_at:
+            return False
+        delta = fields.Datetime.now() - self.last_activity_at
+        return delta.total_seconds() > threshold_hours * 3600
+
+    def message_post(self, **kwargs):
+        """Override: stamp last_activity_at so an operator note counts as
+        activity (defeats false-positive idle warnings during long bakes
+        where the only sign of life is the periodic operator note)."""
+        res = super().message_post(**kwargs)
+        try:
+            self.sudo().with_context(tracking_disable=True).write({
+                'last_activity_at': fields.Datetime.now(),
+            })
+        except Exception as exc:
+            _logger.debug("last_activity_at stamp on message_post failed: %s", exc)
+        return res
+
     # Gate visualizer — drives the OWL GateViz component on the tablet.
     # Returns kind of blocker + human reason + optional (model, id) jump
     # target. Reuses _fp_should_block_predecessors so this stays in sync
@@ -286,6 +409,14 @@ class FpJobStep(models.Model):
                 if new_uid == old_uid:
                     continue
                 post_for.append((step, old_uid, new_uid))
+        # Plant-view: stamp last_activity_at on every state transition so
+        # the S16 idle gate has fresh data. Only stamp when state is in
+        # vals AND it's actually changing (avoid no-op writes spamming
+        # the timestamp).
+        if 'state' in vals and 'last_activity_at' not in vals:
+            new_state = vals['state']
+            if any(step.state != new_state for step in self):
+                vals = dict(vals, last_activity_at=fields.Datetime.now())
         result = super().write(vals)
         Users = self.env['res.users']
         for step, old_uid, new_uid in post_for: