fix: tolerate null legacy custom-world profile

server-rs/crates/module-custom-world/src/application.rs

@@ -694,7 +694,13 @@ fn parse_optional_json_object(
     error: CustomWorldFieldError,
 ) -> Result<Map<String, Value>, CustomWorldFieldError> {
     match normalize_optional_json_slice(value) {
-        Some(value) => parse_required_json_object(&value, error),
+        Some(value) => match serde_json::from_str::<Value>(&value) {
+            Ok(Value::Object(object)) => Ok(object),
+            // 中文注释：跨层可选字段经 serde 结构体序列化后可能显式落成 null；
+            // 对 optional JSON object 而言 null 等价于未提供，不能阻断发布链路。
+            Ok(Value::Null) => Ok(Map::new()),
+            _ => Err(error),
+        },
         None => Ok(Map::new()),
     }
 }
@@ -1018,6 +1024,49 @@ mod tests {
     use super::*;
     use serde_json::json;
 
+    fn build_test_compile_input(
+        legacy_result_profile_json: Option<String>,
+    ) -> CustomWorldPublishedProfileCompileInput {
+        CustomWorldPublishedProfileCompileInput {
+            session_id: "session-1".to_string(),
+            profile_id: "cwprof_001".to_string(),
+            owner_user_id: "user-1".to_string(),
+            draft_profile_json: json!({
+                "name": "潮雾列岛",
+                "summary": "群岛与旧灯塔之间的沉船疑案。",
+                "playableNpcs": [],
+                "storyNpcs": [],
+                "landmarks": []
+            })
+            .to_string(),
+            legacy_result_profile_json,
+            setting_text: "海图会在午夜改写群岛航路。".to_string(),
+            author_display_name: "创作者".to_string(),
+            updated_at_micros: 1,
+        }
+    }
+
+    #[test]
+    fn published_profile_compile_treats_null_legacy_result_profile_as_absent() {
+        let snapshot = build_custom_world_published_profile_compile_snapshot(
+            build_test_compile_input(Some("null".to_string())),
+        )
+        .expect("null legacy result profile should be treated as absent");
+
+        assert_eq!(snapshot.profile_id, "cwprof_001");
+        assert_eq!(snapshot.world_name, "潮雾列岛");
+    }
+
+    #[test]
+    fn published_profile_compile_rejects_non_object_legacy_result_profile() {
+        let error = build_custom_world_published_profile_compile_snapshot(
+            build_test_compile_input(Some("[]".to_string())),
+        )
+        .expect_err("array legacy result profile should still be invalid");
+
+        assert_eq!(error, CustomWorldFieldError::InvalidLegacyResultProfileJson);
+    }
+
     #[test]
     fn publish_setting_text_falls_back_to_draft_profile_when_seed_is_empty() {
         let payload = Map::new();