diff --git a/tests/unit/test_domain_entities_extended.py b/tests/unit/test_domain_entities_extended.py
new file mode 100755
index 000000000..d638320fa
--- /dev/null
+++ b/tests/unit/test_domain_entities_extended.py
@@ -0,0 +1,523 @@
+"""领域实体测试 — Project + Asset + AssetStatus + IngestJob."""
+
+from __future__ import annotations
+
+import pytest
+
+from packages.domain.entities import (
+    Asset,
+    AssetLibrary,
+    AssetStatus,
+    ClassificationStatus,
+    IngestJob,
+    Project,
+    User,
+)
+
+
+class TestUser:
+    """User 实体测试."""
+
+    def test_create_user(self):
+        """创建用户."""
+        user = User(
+            id="u1",
+            email="test@example.com",
+            display_name="测试用户",
+            username="testuser",
+        )
+        assert user.id == "u1"
+        assert user.email == "test@example.com"
+        assert user.display_name == "测试用户"
+        assert user.username == "testuser"
+
+    def test_default_subscription_free(self):
+        """默认订阅免费版."""
+        user = User(id="u1", email="a@b.com", display_name="A")
+        assert user.subscription_plan == "free"
+        assert user.subscription_status == "active"
+        assert user.max_projects == 3
+        assert user.max_storage_gb == 10
+
+    def test_default_not_admin(self):
+        """默认不是管理员."""
+        user = User(id="u1", email="a@b.com", display_name="A")
+        assert user.is_admin is False
+
+
+class TestProject:
+    """Project 实体测试."""
+
+    def test_create_project_success(self):
+        """创建项目成功."""
+        project = Project.create(
+            owner_user_id="user_1",
+            name="我的项目",
+            description="测试项目描述",
+        )
+        assert project.id is not None
+        assert len(project.id) == 32  # uuid hex
+        assert project.owner_user_id == "user_1"
+        assert project.name == "我的项目"
+        assert project.description == "测试项目描述"
+        assert project.shared_users == []
+
+    def test_create_project_name_stripped(self):
+        """项目名称首尾空白被去除."""
+        project = Project.create(owner_user_id="u1", name="  测试项目  ")
+        assert project.name == "测试项目"
+
+    def test_create_project_empty_name_raises(self):
+        """空项目名抛异常."""
+        with pytest.raises(ValueError, match="项目名称不能为空"):
+            Project.create(owner_user_id="u1", name="")
+
+    def test_create_project_whitespace_name_raises(self):
+        """全空白项目名抛异常."""
+        with pytest.raises(ValueError, match="项目名称不能为空"):
+            Project.create(owner_user_id="u1", name="   ")
+
+    def test_is_owner_true(self):
+        """是项目所有者."""
+        project = Project.create(owner_user_id="owner_1", name="项目")
+        assert project.is_owner("owner_1") is True
+
+    def test_is_owner_false(self):
+        """不是项目所有者."""
+        project = Project.create(owner_user_id="owner_1", name="项目")
+        assert project.is_owner("other_user") is False
+
+    def test_is_shared_with_true(self):
+        """项目已共享给用户."""
+        project = Project.create(owner_user_id="u1", name="项目")
+        project.shared_users.append("user_2")
+        assert project.is_shared_with("user_2") is True
+
+    def test_is_shared_with_false(self):
+        """项目未共享给用户."""
+        project = Project.create(owner_user_id="u1", name="项目")
+        assert project.is_shared_with("nobody") is False
+
+    def test_can_access_owner(self):
+        """所有者可以访问."""
+        project = Project.create(owner_user_id="u1", name="项目")
+        assert project.can_access("u1") is True
+
+    def test_can_access_shared_user(self):
+        """共享用户可以访问."""
+        project = Project.create(owner_user_id="u1", name="项目")
+        project.shared_users.append("u2")
+        assert project.can_access("u2") is True
+
+    def test_can_access_outsider(self):
+        """无关用户不能访问."""
+        project = Project.create(owner_user_id="u1", name="项目")
+        assert project.can_access("stranger") is False
+
+
+class TestAssetLibrary:
+    """AssetLibrary 实体测试."""
+
+    def test_create_library(self):
+        """创建素材库."""
+        from packages.domain.classification import AssetLibraryKind
+
+        lib = AssetLibrary.create(
+            project_id="p1",
+            name="默认库",
+            kind=AssetLibraryKind.VIDEO,
+        )
+        assert lib.id is not None
+        assert lib.project_id == "p1"
+        assert lib.name == "默认库"
+        assert lib.kind == AssetLibraryKind.VIDEO
+        assert lib.asset_count == 0
+
+    def test_create_default_counts(self):
+        """默认素材数量和大小为0."""
+        from packages.domain.classification import AssetLibraryKind
+
+        lib = AssetLibrary.create(
+            project_id="p1",
+            name="我的素材",
+            kind=AssetLibraryKind.VOICE,
+        )
+        assert lib.asset_count == 0
+        assert lib.total_size == 0
+
+    def test_empty_name_raises(self):
+        """空名称抛异常."""
+        from packages.domain.classification import AssetLibraryKind
+
+        with pytest.raises(ValueError, match="素材库名称不能为空"):
+            AssetLibrary.create(project_id="p1", name="", kind=AssetLibraryKind.VIDEO)
+
+
+class TestAssetStatus:
+    """AssetStatus 枚举兼容测试."""
+
+    def test_direct_values(self):
+        """直接枚举值."""
+        assert AssetStatus.UPLOADING.value == "uploading"
+        assert AssetStatus.READY.value == "ready"
+        assert AssetStatus.PROCESSING.value == "processing"
+        assert AssetStatus.ERROR.value == "error"
+        assert AssetStatus.DELETED.value == "deleted"
+
+    def test_missing_uploaded_maps_to_ready(self):
+        """历史值 uploaded → READY."""
+        assert AssetStatus("uploaded") == AssetStatus.READY
+
+    def test_missing_success_maps_to_ready(self):
+        """success → READY."""
+        assert AssetStatus("success") == AssetStatus.READY
+
+    def test_missing_ok_maps_to_ready(self):
+        """ok → READY."""
+        assert AssetStatus("ok") == AssetStatus.READY
+
+    def test_missing_done_maps_to_ready(self):
+        """done → READY."""
+        assert AssetStatus("done") == AssetStatus.READY
+
+    def test_missing_upload_maps_to_uploading(self):
+        """upload → UPLOADING."""
+        assert AssetStatus("upload") == AssetStatus.UPLOADING
+
+    def test_missing_uploading_start_maps_to_uploading(self):
+        """uploading_start → UPLOADING."""
+        assert AssetStatus("uploading_start") == AssetStatus.UPLOADING
+
+    def test_missing_failed_maps_to_error(self):
+        """failed → ERROR."""
+        assert AssetStatus("failed") == AssetStatus.ERROR
+
+    def test_missing_fail_maps_to_error(self):
+        """fail → ERROR."""
+        assert AssetStatus("fail") == AssetStatus.ERROR
+
+    def test_missing_process_maps_to_processing(self):
+        """process → PROCESSING."""
+        assert AssetStatus("process") == AssetStatus.PROCESSING
+
+    def test_missing_running_maps_to_processing(self):
+        """running → PROCESSING."""
+        assert AssetStatus("running") == AssetStatus.PROCESSING
+
+    def test_unknown_value_fallback_to_ready(self):
+        """完全未知值 → READY兜底."""
+        assert AssetStatus("completely_unknown") == AssetStatus.READY
+
+    def test_case_insensitive(self):
+        """大小写不敏感."""
+        assert AssetStatus("UPLOADED") == AssetStatus.READY
+        assert AssetStatus("Failed") == AssetStatus.ERROR
+
+    def test_whitespace_stripped(self):
+        """首尾空白被去除."""
+        assert AssetStatus("  ready  ") == AssetStatus.READY
+
+    def test_none_value_fallback(self):
+        """None值 → READY兜底（不抛异常）."""
+        assert AssetStatus(None) == AssetStatus.READY
+
+
+class TestAsset:
+    """Asset 实体测试."""
+
+    def test_create_asset_success(self):
+        """创建素材成功."""
+        asset = Asset.create(
+            project_id="p1",
+            library_id="lib1",
+            name="测试视频.mp4",
+            storage_key="projects/p1/assets/test.mp4",
+            mime_type="video/mp4",
+            file_size=1024000,
+            duration=30.5,
+            width=1920,
+            height=1080,
+        )
+        assert asset.id is not None
+        assert len(asset.id) == 32
+        assert asset.project_id == "p1"
+        assert asset.name == "测试视频.mp4"
+        assert asset.storage_key == "projects/p1/assets/test.mp4"
+        assert asset.mime_type == "video/mp4"
+        assert asset.file_size == 1024000
+        assert asset.duration == pytest.approx(30.5)
+        assert asset.width == 1920
+        assert asset.height == 1080
+        assert asset.status == AssetStatus.UPLOADING
+        assert asset.tag_ids == []
+
+    def test_file_type_video(self):
+        """video类型从mime_type推导."""
+        asset = Asset.create(
+            project_id="p1",
+            library_id="lib1",
+            name="v.mp4",
+            storage_key="k",
+            mime_type="video/mp4",
+        )
+        assert asset.file_type == "video"
+
+    def test_file_type_image(self):
+        """image类型."""
+        asset = Asset.create(
+            project_id="p1",
+            library_id="lib1",
+            name="i.jpg",
+            storage_key="k",
+            mime_type="image/jpeg",
+        )
+        assert asset.file_type == "image"
+
+    def test_file_type_audio(self):
+        """audio类型."""
+        asset = Asset.create(
+            project_id="p1",
+            library_id="lib1",
+            name="a.mp3",
+            storage_key="k",
+            mime_type="audio/mpeg",
+        )
+        assert asset.file_type == "audio"
+
+    def test_file_type_no_slash(self):
+        """mime_type没有斜杠时返回原值."""
+        asset = Asset.create(
+            project_id="p1",
+            library_id="lib1",
+            name="f.txt",
+            storage_key="k",
+            mime_type="text",
+        )
+        assert asset.file_type == "text"
+
+    def test_empty_name_raises(self):
+        """空名称抛异常."""
+        with pytest.raises(ValueError, match="素材名称不能为空"):
+            Asset.create(
+                project_id="p1",
+                library_id="lib1",
+                name="",
+                storage_key="k",
+                mime_type="video/mp4",
+            )
+
+    def test_empty_storage_key_raises(self):
+        """空storage_key抛异常."""
+        with pytest.raises(ValueError, match="storage_key"):
+            Asset.create(
+                project_id="p1",
+                library_id="lib1",
+                name="v.mp4",
+                storage_key="   ",
+                mime_type="video/mp4",
+            )
+
+    def test_empty_mime_type_raises(self):
+        """空mime_type抛异常."""
+        with pytest.raises(ValueError, match="mime_type"):
+            Asset.create(
+                project_id="p1",
+                library_id="lib1",
+                name="v.mp4",
+                storage_key="k",
+                mime_type="",
+            )
+
+    def test_name_stripped(self):
+        """名称首尾空白被去除."""
+        asset = Asset.create(
+            project_id="p1",
+            library_id="lib1",
+            name="  视频.mp4  ",
+            storage_key="k",
+            mime_type="video/mp4",
+        )
+        assert asset.name == "视频.mp4"
+
+    def test_add_tag_success(self):
+        """添加标签成功."""
+        asset = Asset.create(
+            project_id="p1",
+            library_id="lib1",
+            name="v.mp4",
+            storage_key="k",
+            mime_type="video/mp4",
+        )
+        asset.add_tag("tag_1")
+        assert "tag_1" in asset.tag_ids
+        assert len(asset.tag_ids) == 1
+
+    def test_add_duplicate_tag_deduped(self):
+        """重复添加标签自动去重."""
+        asset = Asset.create(
+            project_id="p1",
+            library_id="lib1",
+            name="v.mp4",
+            storage_key="k",
+            mime_type="video/mp4",
+        )
+        asset.add_tag("tag_1")
+        asset.add_tag("tag_1")
+        assert asset.tag_ids.count("tag_1") == 1
+
+    def test_add_empty_tag_raises(self):
+        """空标签ID抛异常."""
+        asset = Asset.create(
+            project_id="p1",
+            library_id="lib1",
+            name="v.mp4",
+            storage_key="k",
+            mime_type="video/mp4",
+        )
+        with pytest.raises(ValueError, match="标签 ID 不能为空"):
+            asset.add_tag("   ")
+
+    def test_remove_tag_success(self):
+        """删除标签成功."""
+        asset = Asset.create(
+            project_id="p1",
+            library_id="lib1",
+            name="v.mp4",
+            storage_key="k",
+            mime_type="video/mp4",
+        )
+        asset.add_tag("tag_1")
+        asset.remove_tag("tag_1")
+        assert "tag_1" not in asset.tag_ids
+
+    def test_remove_nonexistent_tag_no_error(self):
+        """删除不存在的标签不报错（幂等）."""
+        asset = Asset.create(
+            project_id="p1",
+            library_id="lib1",
+            name="v.mp4",
+            storage_key="k",
+            mime_type="video/mp4",
+        )
+        # 不抛异常
+        asset.remove_tag("nonexistent_tag")
+
+    def test_default_status_uploading(self):
+        """默认状态UPLOADING."""
+        asset = Asset.create(
+            project_id="p1",
+            library_id="lib1",
+            name="v.mp4",
+            storage_key="k",
+            mime_type="video/mp4",
+        )
+        assert asset.status == AssetStatus.UPLOADING
+
+    def test_custom_status(self):
+        """自定义状态."""
+        asset = Asset.create(
+            project_id="p1",
+            library_id="lib1",
+            name="v.mp4",
+            storage_key="k",
+            mime_type="video/mp4",
+            status=AssetStatus.READY,
+        )
+        assert asset.status == AssetStatus.READY
+
+    def test_metadata_default_empty_dict(self):
+        """metadata默认为空dict."""
+        asset = Asset.create(
+            project_id="p1",
+            library_id="lib1",
+            name="v.mp4",
+            storage_key="k",
+            mime_type="video/mp4",
+        )
+        assert asset.metadata == {}
+
+    def test_metadata_none_becomes_empty(self):
+        """metadata=None → {}."""
+        asset = Asset.create(
+            project_id="p1",
+            library_id="lib1",
+            name="v.mp4",
+            storage_key="k",
+            mime_type="video/mp4",
+            metadata=None,
+        )
+        assert asset.metadata == {}
+
+
+class TestIngestJob:
+    """IngestJob 实体测试."""
+
+    def test_create_ingest_job(self):
+        """创建入库任务."""
+        job = IngestJob.create(
+            project_id="p1",
+            library_id="lib1",
+            storage_key="projects/p1/uploads/temp.mp4",
+            file_hash="abc123",
+        )
+        assert job.id is not None
+        assert job.project_id == "p1"
+        assert job.library_id == "lib1"
+        assert job.storage_key == "projects/p1/uploads/temp.mp4"
+        assert job.file_hash == "abc123"
+
+    def test_default_status_pending(self):
+        """默认状态PENDING."""
+        from packages.domain.classification import IngestJobStatus
+
+        job = IngestJob.create(
+            project_id="p1",
+            library_id="lib1",
+            storage_key="projects/p1/v.mp4",
+        )
+        assert job.status == IngestJobStatus.PENDING
+
+    def test_empty_project_id_raises(self):
+        """空project_id抛异常."""
+        with pytest.raises(ValueError, match="project_id"):
+            IngestJob.create(
+                project_id="  ",
+                library_id="lib1",
+                storage_key="k",
+            )
+
+    def test_empty_library_id_raises(self):
+        """空library_id抛异常."""
+        with pytest.raises(ValueError, match="library_id"):
+            IngestJob.create(
+                project_id="p1",
+                library_id="",
+                storage_key="k",
+            )
+
+    def test_empty_storage_key_raises(self):
+        """空storage_key抛异常."""
+        with pytest.raises(ValueError, match="storage_key"):
+            IngestJob.create(
+                project_id="p1",
+                library_id="lib1",
+                storage_key="   ",
+            )
+
+    def test_default_result_asset_id_empty(self):
+        """默认result_asset_id为空."""
+        job = IngestJob.create(
+            project_id="p1",
+            library_id="lib1",
+            storage_key="k",
+        )
+        assert job.result_asset_id == ""
+
+    def test_error_message_empty_by_default(self):
+        """默认error_message为空."""
+        job = IngestJob.create(
+            project_id="p1",
+            library_id="lib1",
+            storage_key="k",
+        )
+        assert job.error_message == ""