校验已导入附件的项目路径

imported 附件必须携带有效非空的项目相对路径。

failed 附件仍允许无路径，并补充状态路径组合测试。

apps/ai-game-creator-shell/src-tauri/src/agent/direct_codex_user_item/validation.rs

@@ -50,11 +50,15 @@ pub(crate) fn validate_direct_codex_user_item(
                 if reference.name.trim().is_empty() {
                     return Err("附件缺少文件名".to_string());
                 }
+                let status = reference.status.trim();
+                if status == "imported" && reference.local_path.trim().is_empty() {
+                    return Err("已导入附件缺少项目路径".to_string());
+                }
                 if !reference.local_path.trim().is_empty() {
                     sanitize_attachment_local_path(&reference.local_path)
                         .ok_or_else(|| "附件项目路径无效".to_string())?;
                 }
-                if !matches!(reference.status.trim(), "imported" | "failed") {
+                if !matches!(status, "imported" | "failed") {
                     return Err("附件状态无效".to_string());
                 }
             }
@@ -186,4 +190,28 @@ mod tests {
             .expect_err("too many inline attachments must be rejected");
         assert!(error.contains("最多携带"), "{error}");
     }
+
+    #[test]
+    fn imported_attachment_requires_a_project_path() {
+        let root = tempfile::tempdir().expect("temp project");
+        crate::init_local_game_project_at(root.path(), "validation-test", "校验测试")
+            .expect("init project");
+        let item = serde_json::from_value(json!({
+            "type": "message",
+            "role": "user",
+            "content": [{
+                "type": "agc_attachment_reference",
+                "name": "attachment.txt",
+                "mediaType": "text/plain",
+                "size": 1,
+                "localPath": "",
+                "status": "imported"
+            }],
+            "id": "turn-1:user"
+        }))
+        .expect("deserialize user item");
+        let error = validate_direct_codex_user_item(root.path(), &item)
+            .expect_err("imported attachment without a project path must fail");
+        assert!(error.contains("缺少项目路径"), "{error}");
+    }
 }