migration: audit uncertain code and prepare handoff

app/tests/test_preservation_slice_market_insights.py

@@ -8,10 +8,9 @@ from pathlib import Path
 import market_insights
 from backend.features.market import insights as canonical_insights
 from tests.preservation_helpers import (
-    ORIGINAL_STATIC,
+    assert_frontend_runtime_matches_audited_baseline,
     assert_moved_asset_matches,
     assert_page_prefix_matches,
-    reassembled_frontend_runtime,
 )
 
 
@@ -184,10 +183,7 @@ class MarketInsightsSliceSourceEquivalenceTests(unittest.TestCase):
             sha256(APP_ROOT / "config/api.config.json"),
             sha256(ORIGINAL_ROOT / "config/api.config.json"),
         )
-        self.assertEqual(
-            reassembled_frontend_runtime(),
-            (ORIGINAL_STATIC / "app.js").read_text(encoding="utf-8"),
-        )
+        assert_frontend_runtime_matches_audited_baseline(self)
         assert_moved_asset_matches(self, "styles.css", "styles/styles.css")
         for page in (
             "pages/auction/page.js",