refactor(ebook-search): simplify search and phrase matching

python/ebook_search/api/routes/search.py

@@ -16,7 +16,7 @@ from python.ebook_search.api.dependencies import (  # noqa: TC001 FastAPI resolv
     AppEngine,
     AppHttpClient,
 )
-from python.ebook_search.api.web import templates
+from python.ebook_search.api.web import error_response, templates
 from python.ebook_search.guardrails import (
     CitationReport,
     is_confident,
@@ -95,7 +95,7 @@ async def search(
         )
     except Exception as error:
         logger.exception("ebook_search_request_failed")
-        return templates.TemplateResponse(request, "partials/error.html", {"message": str(error)}, status_code=500)
+        return error_response(request, error)
 
     answer_start = perf_counter()
     answer, low_confidence, citation_report = await build_answer(client, query, response, config)