fix: round website rates to two decimals

backend/app/services/website_client.py

@@ -7,7 +7,7 @@ from urllib.parse import quote
 
 import httpx
 
-from app.utils.number import decimal_string
+from app.utils.number import fixed_decimal_number, fixed_decimal_string
 
 logger = logging.getLogger(__name__)
 
@@ -67,7 +67,7 @@ def calculate_target_rate(values: list[Any], percent: Any = 0, algorithm: str =
     pct = Decimal(str(percent or 0))
     if pct < 0:
         raise WebsiteError("百分比不能为负数")
-    return (base * (Decimal("1") + pct / Decimal("100"))).quantize(Decimal("0.0001"), rounding=ROUND_HALF_UP)
+    return (base * (Decimal("1") + pct / Decimal("100"))).quantize(Decimal("0.01"), rounding=ROUND_HALF_UP)
 
 
 def _unwrap_data(value: Any) -> Any:
@@ -122,7 +122,7 @@ def normalize_groups(value: Any) -> list[dict[str, Any]]:
         groups.append({
             "id": str(gid),
             "name": str(name),
-            "rate_multiplier": decimal_string(rate) if rate is not None else None,
+            "rate_multiplier": fixed_decimal_string(rate, 2) if rate is not None else None,
             "raw": item,
         })
     return groups
@@ -209,9 +209,9 @@ class Sub2ApiWebsiteClient:
         msg = str(last_error) if last_error else "拉取分组失败"
         raise WebsiteError(f"{msg}（尝试接口：{'、'.join(tried_paths)}）")
 
-    def update_group_rate(self, endpoint_template: str, group_id: str, rate: Decimal) -> Any:
+    def update_group_rate(self, endpoint_template: str, group_id: str, rate: Any) -> Any:
         path = endpoint_template.replace("{id}", quote(group_id, safe=""))
-        return self._request("PUT", path, {"rate_multiplier": float(rate)})
+        return self._request("PUT", path, {"rate_multiplier": fixed_decimal_number(rate, 2)})
 
     def create_group(self, body: dict[str, Any], endpoint: str = "/groups") -> dict[str, Any]:
         resp = self._request("POST", endpoint, body)