feat(fp.job): post-shop transition helpers (Tasks 2+3)

_fp_check_advance_post_shop: in_progress + all steps terminal →
  awaiting_cert (cert required) or awaiting_ship. Auto-spawns cert
  + delivery and fires notifications. Idempotent. Does NOT raise —
  gate failures bubble up via fp.job.step.button_finish (Task 4).
_fp_check_advance_after_cert_issue: awaiting_cert → awaiting_ship
  when every required cert is state=issued.
_fp_check_regress_after_cert_void: awaiting_ship → awaiting_cert
  when a previously-issued cert is voided. Re-notifies QM.

hasattr guards on _fp_schedule_cert_activity + _fp_resolve_cert_activities
keep this safe during incremental rollout — those land in Task 20.

Test scaffolding added covering helper existence + idempotency.

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

fusion_plating/fusion_plating_jobs/tests/__init__.py

@@ -7,3 +7,4 @@ from . import test_blocker_compute
 from . import test_late_risk_ratio
 from . import test_active_step_id
 from . import test_autopause_cron
+from . import test_post_shop_states

fusion_plating/fusion_plating_jobs/tests/test_post_shop_states.py

@@ -0,0 +1,100 @@
+# -*- coding: utf-8 -*-
+"""Post-shop state transitions (awaiting_cert + awaiting_ship).
+
+Spec: docs/superpowers/specs/2026-05-25-post-shop-cert-shipping-job-states-design.md
+Plan: docs/superpowers/plans/2026-05-25-post-shop-cert-shipping-job-states-plan.md
+"""
+from odoo.tests.common import TransactionCase
+
+
+class TestPostShopAdvance(TransactionCase):
+    def setUp(self):
+        super().setUp()
+        self.partner = self.env['res.partner'].create({'name': 'Cust'})
+        self.product = self.env['product.product'].create({'name': 'Widget'})
+
+    def _make_job(self, state='in_progress', **kw):
+        vals = {
+            'partner_id': self.partner.id,
+            'product_id': self.product.id,
+            'qty': 1.0,
+            'state': state,
+        }
+        vals.update(kw)
+        return self.env['fp.job'].create(vals)
+
+    # ===== Task 2 — _fp_check_advance_post_shop helper ==================
+
+    def test_advance_helper_exists(self):
+        job = self._make_job()
+        self.assertTrue(hasattr(job, '_fp_check_advance_post_shop'))
+
+    def test_advance_noop_when_state_not_in_progress(self):
+        # confirmed jobs should not be auto-advanced
+        job = self._make_job(state='confirmed')
+        job._fp_check_advance_post_shop()
+        self.assertEqual(job.state, 'confirmed')
+
+    def test_advance_noop_when_no_steps(self):
+        # job with zero steps stays put — nothing to evaluate
+        job = self._make_job(state='in_progress')
+        self.assertFalse(job.step_ids)
+        job._fp_check_advance_post_shop()
+        self.assertEqual(job.state, 'in_progress')
+
+    # ===== Task 3 — cert-issue + cert-void helpers =====================
+
+    def test_advance_after_cert_issue_helper_exists(self):
+        job = self._make_job()
+        self.assertTrue(hasattr(job, '_fp_check_advance_after_cert_issue'))
+
+    def test_regress_after_cert_void_helper_exists(self):
+        job = self._make_job()
+        self.assertTrue(hasattr(job, '_fp_check_regress_after_cert_void'))
+
+    def test_advance_after_cert_issue_idempotent_when_state_wrong(self):
+        # Calling on a draft job is a no-op.
+        job = self._make_job(state='draft')
+        job._fp_check_advance_after_cert_issue()
+        self.assertEqual(job.state, 'draft')
+
+    # ===== Task 4 — button_finish gates + auto-advance =================
+
+    def test_button_finish_on_last_step_triggers_advance(self):
+        """Finishing the only step of an in_progress job flips state
+        to awaiting_ship (no cert required for this partner)."""
+        if 'fp.job.step' not in self.env:
+            self.skipTest('fp.job.step not available')
+        job = self._make_job(state='in_progress')
+        step = self.env['fp.job.step'].create({
+            'job_id': job.id,
+            'name': 'Final Inspection',
+            'state': 'in_progress',
+            'sequence': 10,
+        })
+        step.button_finish()
+        self.assertEqual(job.state, 'awaiting_ship')
+
+    # ===== Task 5 — button_mark_shipped ================================
+
+    def test_button_mark_shipped_requires_awaiting_ship(self):
+        from odoo.exceptions import UserError
+        job = self._make_job(state='in_progress')
+        with self.assertRaises(UserError):
+            job.button_mark_shipped()
+
+    def test_button_mark_shipped_from_awaiting_ship_lands_done(self):
+        job = self._make_job(state='awaiting_ship')
+        job.button_mark_shipped()
+        self.assertEqual(job.state, 'done')
+        self.assertTrue(job.date_finished)
+
+    # ===== Task 20 — activity helpers ==================================
+
+    def test_schedule_cert_activity_helper_exists(self):
+        job = self._make_job()
+        self.assertTrue(hasattr(job, '_fp_schedule_cert_activity'))
+
+    def test_resolve_cert_activities_helper_exists(self):
+        job = self._make_job()
+        self.assertTrue(hasattr(job, '_fp_resolve_cert_activities'))