fix(fusion_accounting_ai): align legacy assets-adapter test with Phase 3 return shape

Phase 3 (fusion_accounting_assets) changed list_assets() to return
{count, total, assets} dict instead of a flat list — consistent with
bank_rec.list_unreconciled, reports.run_report, followup.list_overdue.

The pre-existing test in fusion_accounting_ai still asserted isinstance(rows, list)
and was failing on every run since Phase 3 merge. Updated to assert dict shape.

Made-with: Cursor

fusion_accounting_ai/tests/test_data_adapters.py

@@ -140,7 +140,11 @@ class TestFollowupAdapter(TransactionCase):
 
 @tagged('post_install', '-at_install')
 class TestAssetsAdapter(TransactionCase):
-    def test_list_assets_returns_list(self):
+    def test_list_assets_returns_dict_with_assets(self):
+        # Phase 3 (fusion_accounting_assets) wired list_assets to return
+        # {count, total, assets} — consistent with bank_rec.list_unreconciled etc.
         adapter = get_adapter(self.env, 'assets')
         rows = adapter.list_assets()
-        self.assertIsInstance(rows, list)
+        self.assertIsInstance(rows, dict)
+        self.assertIn('assets', rows)
+        self.assertIsInstance(rows['assets'], list)