feat(fusion_repairs): maintenance foundation - policy + priced auto-contracts on sale (Plan 1)

Plan 1 of fusion_maintenance, verified on the Westin Enterprise sandbox (westin-fr-test) via odoo shell. Maintenance policy (enabled/interval/flat fee/service product) on the equipment category + per-product fee override; contract gains fee/source/serial/policy/currency; fixed the dead _spawn_maintenance_contracts and wired it into the existing action_confirm (delivery-date anchor w/ fallback, two-regime serial dedup, fee resolution product->category); reminder email shows the flat fee; category form exposes the policy. Verified: trigger creates 1 priced contract (fee 149, next_due commitment+6mo, source=sale); idempotent on re-confirm; product override beats category; no contract when category not maintainable; fee renders as $149.00. v19.0.2.3.0.

NOTE: mail_template_data.xml is noupdate=1 -> the fee line loads on fresh install (the prod deploy) but NOT on -u of an already-installed system. The Westin prod-config test container (workers + log_level=warn) does not run --test-enable post_install tests (a pre-existing module load issue under the test phase), so behaviour was verified by odoo shell instead.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

fusion_repairs/tests/__init__.py

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+# -*- coding: utf-8 -*-
+from . import test_maintenance_foundation

fusion_repairs/tests/test_maintenance_foundation.py

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+# -*- coding: utf-8 -*-
+from odoo.tests import TransactionCase, tagged
+
+
+@tagged('post_install', '-at_install')
+class TestMaintenanceFoundation(TransactionCase):
+
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        cls.partner = cls.env['res.partner'].create({'name': 'Mrs. Test Client'})
+        cls.category = cls.env['fusion.repair.product.category'].create({
+            'name': 'Stair Lift', 'code': 'stairlift_test',
+            'equipment_class': 'lift_elevating', 'safety_critical': True,
+            'x_fc_maintenance_enabled': True,
+            'x_fc_maintenance_interval_months': 6,
+            'x_fc_maintenance_fee': 149.0,
+        })
+
+    # ---- Tasks 1/2/3: fields exist ----
+    def test_category_policy_fields(self):
+        self.assertTrue(self.category.x_fc_maintenance_enabled)
+        self.assertEqual(self.category.x_fc_maintenance_interval_months, 6)
+        self.assertEqual(self.category.x_fc_maintenance_fee, 149.0)
+        self.assertTrue(self.category.currency_id)
+
+    def test_product_fee_override_field(self):
+        tmpl = self.env['product.template'].create({
+            'name': 'Handicare Freecurve Stairlift',
+            'x_fc_repair_category_id': self.category.id,
+            'x_fc_maintenance_fee': 199.0,
+        })
+        self.assertEqual(tmpl.x_fc_maintenance_fee, 199.0)
+
+    def test_contract_extension_fields(self):
+        product = self.env['product.product'].create({'name': 'Unit'})
+        c = self.env['fusion.repair.maintenance.contract'].create({
+            'partner_id': self.partner.id,
+            'product_id': product.id,
+            'next_due_date': '2026-12-01',
+            'x_fc_source': 'sale',
+            'x_fc_device_serial': 'SN-123',
+            'x_fc_maintenance_fee': 149.0,
+        })
+        self.assertEqual(c.x_fc_source, 'sale')
+        self.assertEqual(c.x_fc_device_serial, 'SN-123')
+        self.assertEqual(c.x_fc_maintenance_fee, 149.0)
+
+    # ---- Task 4: spawn priced contracts on sale confirm ----
+    def _make_product(self, **kw):
+        vals = {'name': 'Stairlift Unit', 'type': 'consu',
+                'x_fc_repair_category_id': self.category.id}
+        vals.update(kw)
+        return self.env['product.product'].create(vals)
+
+    def _confirm_so(self, product, commitment='2026-01-10'):
+        so = self.env['sale.order'].create({
+            'partner_id': self.partner.id,
+            'commitment_date': commitment,
+            'order_line': [(0, 0, {'product_id': product.id, 'product_uom_qty': 1})],
+        })
+        so.action_confirm()
+        return so
+
+    def _contracts_for(self, so):
+        return self.env['fusion.repair.maintenance.contract'].search(
+            [('original_sale_order_id', '=', so.id)])
+
+    def test_no_contract_when_category_not_maintainable(self):
+        cat = self.env['fusion.repair.product.category'].create(
+            {'name': 'Cane', 'code': 'cane_test', 'x_fc_maintenance_enabled': False})
+        so = self._confirm_so(self._make_product(x_fc_repair_category_id=cat.id))
+        self.assertFalse(self._contracts_for(so))
+
+    def test_contract_created_via_category_policy(self):
+        so = self._confirm_so(self._make_product())
+        contracts = self._contracts_for(so)
+        self.assertEqual(len(contracts), 1)
+        c = contracts
+        self.assertEqual(c.interval_months, 6)
+        self.assertEqual(c.x_fc_maintenance_fee, 149.0)
+        self.assertEqual(c.x_fc_source, 'sale')
+        self.assertEqual(c.x_fc_policy_category_id, self.category)
+        # anchor = commitment_date (2026-01-10) + 6 months
+        self.assertEqual(str(c.next_due_date), '2026-07-10')
+
+    def test_product_override_beats_category(self):
+        p = self._make_product()
+        p.product_tmpl_id.x_fc_maintenance_interval_months = 3
+        p.product_tmpl_id.x_fc_maintenance_fee = 199.0
+        so = self._confirm_so(p)
+        c = self._contracts_for(so)
+        self.assertEqual(c.interval_months, 3)
+        self.assertEqual(c.x_fc_maintenance_fee, 199.0)
+
+    def test_idempotent_on_reconfirm(self):
+        p = self._make_product()
+        so = self._confirm_so(p)
+        so._spawn_maintenance_contracts()  # call again -> no duplicate
+        self.assertEqual(len(self._contracts_for(so)), 1)