refactor: establish standalone application boundary

app/backend/features/auction/routes.py

@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+from datetime import date
+from http import HTTPStatus
+from urllib.parse import parse_qs
+from backend.data.providers.tushare_client import TushareError
+
+
+class AuctionRoutesMixin:
+    def _handle_auction_get(self, parsed) -> bool:
+        if parsed.path == "/api/auction":
+            query = parse_qs(parsed.query)
+            try:
+                self.send_json(
+                    self.application_service.auction_center(
+                        query.get("trade_date", [date.today().isoformat()])[0],
+                        query.get("force", ["0"])[0] == "1",
+                    )
+                )
+            except (ValueError, TushareError) as exc:
+                self.send_json({"error": str(exc)}, HTTPStatus.BAD_REQUEST)
+            return True
+        return False