refactor: establish standalone application boundary

tests/test_global_search.py

@@ -4,7 +4,10 @@ import unittest
 from pathlib import Path
 
 from server import DashboardService
-from tests.preservation_helpers import reassembled_frontend_runtime
+from tests.frontend_test_helpers import (
+    assembled_frontend_runtime,
+    assembled_frontend_document,
+)
 
 
 class SearchDatabaseStub:
@@ -79,8 +82,8 @@ class GlobalSearchTests(unittest.TestCase):
 
     def test_frontend_reuses_full_stock_detail_and_renders_market_daily_k(self):
         static_dir = Path(__file__).resolve().parents[1] / "frontend"
-        html = (static_dir / "index.html").read_text(encoding="utf-8")
-        script = reassembled_frontend_runtime()
+        html = assembled_frontend_document()
+        script = assembled_frontend_runtime()
 
         self.assertIn('id="globalSearchButton"', html)
         self.assertIn('id="globalSearchDialog"', html)