fix: make full_margin env save/restart reliable (no empty numeric wipe).

EOF

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/env/env_schema.py

@@ -103,6 +103,23 @@ SENSITIVE_EXACT = frozenset({
 SENSITIVE_SUBSTR = ("_SECRET", "_PASSPHRASE", "_API_KEY", "_PASSWORD")
 
 
+def normalize_position_sizing_mode(raw: str) -> str:
+    """把中文/别名规范成 risk | full_margin。"""
+    s = (raw or "").strip().lower().replace("-", "_").replace(" ", "")
+    if s in ("risk", "以损", "以损定仓", "riskpercent", "risk_percent"):
+        return "risk"
+    if s in (
+        "full_margin",
+        "fullmargin",
+        "full",
+        "全仓",
+        "全仓杠杆",
+        "margin",
+    ):
+        return "full_margin"
+    return (raw or "").strip()
+
+
 def _is_sensitive(key: str) -> bool:
     if key in SENSITIVE_EXACT:
         return True
@@ -275,17 +292,47 @@ def validate_env_updates(groups: list[dict], updates: dict[str, str]) -> tuple[d
         val = str(value).strip()
         if allowed[key].get("sensitive") and (val == "" or (val.startswith("****") and len(val) <= 8)):
             continue
+        # 数字项留空不覆盖已有 .env，避免 RISK_PERCENT= 导致重启崩掉
+        ftype = allowed[key].get("type")
+        if val == "" and ftype in ("float", "int"):
+            continue
+        if val == "" and key in (
+            "POSITION_SIZING_MODE",
+            "TRADE_DIRECTION",
+            "RISK_PERCENT",
+            "FULL_MARGIN_BUFFER_RATIO",
+            "BTC_LEVERAGE",
+            "ALT_LEVERAGE",
+            "MAX_ACTIVE_POSITIONS",
+        ):
+            continue
         # API Key 被密码管理器/自动填充成登录密码时通常很短;OKX Key 一般为 36 位
         if key.endswith("_API_KEY") and 0 < len(val) < 16:
             errors.append(f"{key} 长度异常,疑似自动填充;留空则不修改已有密钥")
             continue
-        ftype = allowed[key].get("type")
+        if key == "POSITION_SIZING_MODE":
+            val = normalize_position_sizing_mode(val)
+            if val not in ("risk", "full_margin"):
+                errors.append("计仓模式须为 risk（以损定仓）或 full_margin（全仓杠杆）")
+                continue
         if ftype == "bool":
             low = val.lower()
             if low not in ("true", "false", "1", "0", "yes", "no", "on", "off"):
                 errors.append(f"{key} 须为 true/false")
                 continue
             val = "true" if low in ("true", "1", "yes", "on") else "false"
+        elif ftype == "float" and val != "":
+            try:
+                float(val)
+            except ValueError:
+                errors.append(f"{key} 须为数字")
+                continue
+        elif ftype == "int" and val != "":
+            try:
+                int(val)
+            except ValueError:
+                errors.append(f"{key} 须为整数")
+                continue
         clean[key] = val
     return clean, errors