feat: implement automatic margin pricing and margin reverse engineering in sync

backend/app/services/website_client.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 import logging
 import sys
 import time
-from decimal import Decimal, InvalidOperation, ROUND_HALF_UP
+from decimal import Decimal, InvalidOperation, ROUND_HALF_UP, ROUND_UP
 from typing import Any
 from urllib.parse import quote, urlparse
 
@@ -66,25 +66,16 @@ def calculate_target_rate(values: list[Any], percent: Any = 0, algorithm: str =
     elif algorithm == "max_plus_percent":
         base = max(rates)
     elif algorithm == "priority_weighted_plus_percent":
-        rates_sorted = sorted(rates)
-        N = len(rates_sorted)
-        if N == 1:
-            base = rates_sorted[0]
-        else:
-            w1 = Decimal("0.85")
-            w_others = Decimal("0.15") / Decimal(N - 1)
-            base = rates_sorted[0] * w1 + sum(rates_sorted[1:], Decimal("0")) * w_others
+        min_rate = min(rates)
+        max_rate = max(rates)
+        raw_target = max(min_rate * Decimal("1.50"), max_rate * Decimal("1.10"))
+        return raw_target.quantize(Decimal("0.01"), rounding=ROUND_UP)
     else:
         raise WebsiteError(f"不支持的算法：{algorithm}")
     pct = Decimal(str(percent or 0))
     if pct < 0:
         raise WebsiteError("百分比不能为负数")
-    target_rate = (base * (Decimal("1") + pct / Decimal("100"))).quantize(Decimal("0.01"), rounding=ROUND_HALF_UP)
-    if algorithm == "priority_weighted_plus_percent":
-        min_rate_2d = min(rates).quantize(Decimal("0.01"), rounding=ROUND_HALF_UP)
-        if target_rate < min_rate_2d:
-            target_rate = min_rate_2d
-    return target_rate
+    return (base * (Decimal("1") + pct / Decimal("100"))).quantize(Decimal("0.01"), rounding=ROUND_HALF_UP)
 
 
 def _unwrap_data(value: Any) -> Any: