fix: round website rates to two decimals

backend/app/services/website_sync.py

@@ -11,9 +11,10 @@ from app.models.snapshot import UpstreamRateSnapshot
 from app.models.upstream import Upstream
 from app.models.upstream_key import UpstreamGeneratedKey
 from app.models.website import Website, WebsiteGroupBinding, WebsiteSyncLog
-from app.services.website_client import Sub2ApiWebsiteClient, WebsiteError, _extract_id, calculate_target_rate, decimal_string
+from app.services.website_client import Sub2ApiWebsiteClient, WebsiteError, _extract_id, calculate_target_rate
 from app.services.upstream_client import UpstreamClient
 from app.services import webhook_service
+from app.utils.number import fixed_decimal_string
 
 logger = logging.getLogger(__name__)
 
@@ -91,8 +92,8 @@ def _log(
         algorithm=binding.algorithm,
         percent=binding.percent,
         source_rates_json=json.dumps(source_rates, ensure_ascii=False),
-        old_rate=decimal_string(old_rate) if old_rate not in (None, "") else None,
-        new_rate=decimal_string(new_rate) if new_rate not in (None, "") else None,
+        old_rate=fixed_decimal_string(old_rate, 2) if old_rate not in (None, "") else None,
+        new_rate=fixed_decimal_string(new_rate, 2) if new_rate not in (None, "") else None,
         status=status,
         message=message,
     )
@@ -147,7 +148,11 @@ def sync_binding(db: Session, binding: WebsiteGroupBinding, write: bool = True)
                 groups = client.get_groups(website.groups_endpoint)
                 target = next((item for item in groups if item.get("id") == binding.target_group_id), None)
                 old_rate = target.get("rate_multiplier") if target else None
-                client.update_group_rate(website.group_update_endpoint, binding.target_group_id, target_rate)
+                client.update_group_rate(
+                    website.group_update_endpoint,
+                    binding.target_group_id,
+                    target_rate,
+                )
             website.last_status = "healthy"
             website.last_error = None
         except Exception as exc:
@@ -157,8 +162,8 @@ def sync_binding(db: Session, binding: WebsiteGroupBinding, write: bool = True)
             return _log(db, binding, website, source_rates, "failed", f"写回失败：{exc}", old_rate, target_rate)
         db.commit()
         log = _log(db, binding, website, source_rates, "success", "同步成功", old_rate, target_rate)
-        old_rate_str = decimal_string(old_rate) if old_rate not in (None, "") else None
-        new_rate_str = decimal_string(target_rate)
+        old_rate_str = fixed_decimal_string(old_rate, 2) if old_rate not in (None, "") else None
+        new_rate_str = fixed_decimal_string(target_rate, 2)
         if old_rate_str != new_rate_str:
             webhook_service.send_website_rate_changed(
                 db,