fix: refresh custom placeholders without restart

Closes #5770

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")