feat(portal): per-stage timestamps on fp.portal.job

Adds received_at, in_progress_started_at, qc_started_at,
ready_to_ship_at, shipped_at - snapshotted on state change via
write() override using super().write() to avoid recursion. Required
for the vertical-timeline rendering on the job detail page (Phase 3).

Idempotent: re-transitioning to a state already-stamped does not
overwrite the original timestamp.

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

fusion_plating/fusion_plating_portal/models/fp_portal_job.py

@@ -63,6 +63,31 @@ class FpPortalJob(models.Model):
         string='Actual Ship Date',
         tracking=True,
     )
+
+    # Per-stage Datetime timestamps for the customer-facing timeline.
+    # Snapshotted by write()/create() on state changes (idempotent).
+    received_at = fields.Datetime(
+        string='Received Timestamp',
+        readonly=True,
+        help='Auto-set when state first reaches received.',
+    )
+    in_progress_started_at = fields.Datetime(
+        string='In Progress Started At',
+        readonly=True,
+    )
+    qc_started_at = fields.Datetime(
+        string='QC Started At',
+        readonly=True,
+    )
+    ready_to_ship_at = fields.Datetime(
+        string='Ready to Ship At',
+        readonly=True,
+    )
+    shipped_at = fields.Datetime(
+        string='Shipped At',
+        readonly=True,
+    )
+
     process_type_ids = fields.Many2many(
         'fusion.plating.process.type',
         'fp_portal_job_process_type_rel',
@@ -164,3 +189,36 @@ class FpPortalJob(models.Model):
                 walk(child, depth + 1)
         walk(mo.x_fc_recipe_id, 0)
         return result
+
+    # ==========================================================================
+    # Per-stage timestamp snapshots
+    # ==========================================================================
+    _STATE_TO_TS_FIELD = {
+        'received': 'received_at',
+        'in_progress': 'in_progress_started_at',
+        'quality_check': 'qc_started_at',
+        'ready_to_ship': 'ready_to_ship_at',
+        'shipped': 'shipped_at',
+    }
+
+    def write(self, vals):
+        if 'state' in vals:
+            ts_field = self._STATE_TO_TS_FIELD.get(vals['state'])
+            if ts_field:
+                now = fields.Datetime.now()
+                # Snapshot the timestamp only for records that don't have it yet,
+                # so re-transitioning to the same state doesn't overwrite history.
+                for rec in self:
+                    if not rec[ts_field]:
+                        super(FpPortalJob, rec).write({ts_field: now})
+        return super().write(vals)
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        records = super().create(vals_list)
+        now = fields.Datetime.now()
+        for rec in records:
+            ts_field = self._STATE_TO_TS_FIELD.get(rec.state)
+            if ts_field and not rec[ts_field]:
+                super(FpPortalJob, rec).write({ts_field: now})
+        return records

fusion_plating/fusion_plating_portal/tests/test_portal_dashboard.py

@@ -57,3 +57,20 @@ class TestPortalDashboard(TransactionCase):
         self.assertEqual(active, 2)
         self.assertEqual(awaiting_review, 1)
         self.assertEqual(ready_to_ship, 1)
+
+    def test_state_change_snapshots_timestamp(self):
+        """write({'state': 'in_progress'}) sets in_progress_started_at."""
+        from odoo import fields as odoo_fields
+        Job = self.env['fusion.plating.portal.job']
+        job = Job.create({
+            'name': 'WO-TS-001',
+            'partner_id': self.partner.id,
+            'state': 'received',
+        })
+        self.assertTrue(job.received_at, 'received_at set on create')
+        before = odoo_fields.Datetime.now()
+        job.state = 'in_progress'
+        self.assertTrue(job.in_progress_started_at, 'in_progress_started_at set')
+        self.assertGreaterEqual(job.in_progress_started_at, before)
+        # received_at must not be overwritten when state advances
+        self.assertTrue(job.received_at)