fix: refresh custom placeholders without restart

Closes #5770

Author: jxxghp

app/core/meta/customization.py

@@ -15,21 +15,32 @@ def __init__(self):
         self.customization = None
         self.custom_separator = None
 
+    @staticmethod
+    def _normalize_customization(customization):
+        """
+        规范化自定义占位符配置，兼容历史字符串与列表两种保存格式。
+        """
+        if isinstance(customization, str):
+            customization = customization.replace("\n", ";").replace("|", ";").strip(";").split(";")
+        if not customization:
+            return []
+        return list(filter(None, customization))
+
     def match(self, title=None):
         """
         :param title: 资源标题或文件名
         :return: 匹配结果
         """
         if not title:
             return ""
-        if not self.customization:
-            # 自定义占位符
-            customization = self.systemconfig.get(SystemConfigKey.Customization)
-            if not customization:
-                return ""
-            if isinstance(customization, str):
-                customization = customization.replace("\n", ";").replace("|", ";").strip(";").split(";")
-            self.customization = "|".join([f"({item})" for item in customization])
+        # 自定义占位符需要跟随系统配置实时生效，避免单例缓存导致保存后仍沿用旧规则。
+        customization = self._normalize_customization(
+            self.systemconfig.get(SystemConfigKey.Customization)
+        )
+        if not customization:
+            self.customization = None
+            return ""
+        self.customization = "|".join([f"({item})" for item in customization])
 
         customization_re = re.compile(r"%s" % self.customization)
         # 处理重复多次的情况，保留先后顺序（按添加自定义占位符的顺序）

tests/test_customization_matcher.py

@@ -0,0 +1,20 @@
+from unittest import TestCase
+from unittest.mock import patch
+
+from app.core.meta.customization import CustomizationMatcher
+
+
+class CustomizationMatcherTest(TestCase):
+    def test_match_uses_latest_customization_setting(self):
+        """自定义占位符修改后，下一次识别应直接使用新配置。"""
+        matcher = CustomizationMatcher()
+        values = [["GROUP"], ["TEAM"]]
+
+        with patch.object(
+            matcher.systemconfig,
+            "get",
+            side_effect=lambda _: values[0],
+        ):
+            self.assertEqual(matcher.match("[GROUP][TEAM] Movie"), "GROUP")
+            values[0] = ["TEAM"]
+            self.assertEqual(matcher.match("[GROUP][TEAM] Movie"), "TEAM")