refactor: establish standalone application boundary

app/backend/features/dragon_tiger/routes.py

@@ -0,0 +1,45 @@
+from __future__ import annotations
+
+import json
+from datetime import date
+from http import HTTPStatus
+from urllib.parse import parse_qs
+from backend.bootstrap.config import validate_text
+
+
+class DragonTigerRoutesMixin:
+    def _handle_dragon_tiger_get(self, parsed) -> bool:
+        if parsed.path == "/api/dragon-tiger":
+            query = parse_qs(parsed.query)
+            trade_date = query.get("trade_date", [date.today().isoformat()])[0]
+            force = query.get("force", ["0"])[0] == "1"
+            try:
+                self.send_json(self.application_service.get_dragon_tiger(trade_date, force))
+            except ValueError as exc:
+                self.send_json({"error": str(exc)}, HTTPStatus.BAD_REQUEST)
+            return True
+        if parsed.path == "/api/dragon-tiger/profiles":
+            query = parse_qs(parsed.query)
+            try:
+                self.send_json(
+                    self.application_service.get_hot_money_profiles(
+                        query.get("force", ["0"])[0] == "1"
+                    )
+                )
+            except ValueError as exc:
+                self.send_json({"error": str(exc)}, HTTPStatus.BAD_REQUEST)
+            return True
+        if parsed.path == "/api/seat-aliases":
+            self.send_json({"items": self.application_service.database.list_seat_aliases()})
+            return True
+        return False
+
+    def save_seat_alias(self) -> None:
+        try:
+            body = self.read_json_body()
+            seat_name = validate_text(body.get("seat_name"), "席位名称", 200, required=True)
+            alias = validate_text(body.get("alias"), "席位别名", 50, required=True)
+            self.application_service.database.save_seat_alias(seat_name, alias)
+            self.send_json({"ok": True})
+        except (ValueError, json.JSONDecodeError) as exc:
+            self.send_json({"error": str(exc)}, HTTPStatus.BAD_REQUEST)