migration: audit uncertain code and prepare handoff

app/tests/test_preservation_slice_screener.py

@@ -12,10 +12,9 @@ import strategy_tracking
 from backend.features.screener import compiler, engine, strategies, tracking
 from backend.features.screener import service as screener_service
 from tests.preservation_helpers import (
-    ORIGINAL_STATIC,
+    assert_frontend_runtime_matches_audited_baseline,
     assert_moved_asset_matches,
     assert_page_prefix_matches,
-    reassembled_frontend_runtime,
 )
 
 
@@ -188,10 +187,7 @@ class ScreenerSliceSourceEquivalenceTests(unittest.TestCase):
         )
 
     def test_screener_frontend_assets_are_unchanged(self) -> None:
-        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")
         assert_page_prefix_matches(self, "pages/screener/page.js")