diff --git a/tests/unit/test_editing_mode_domain.py b/tests/unit/test_editing_mode_domain.py
new file mode 100755
index 000000000..63e5cb08d
--- /dev/null
+++ b/tests/unit/test_editing_mode_domain.py
@@ -0,0 +1,40 @@
+"""
+EditingMode 剪辑模式枚举单元测试
+"""
+
+from packages.domain.editing_mode import EditingMode
+
+
+class TestEditingMode:
+    """EditingMode 枚举测试"""
+
+    def test_all_modes_exist(self):
+        assert EditingMode.ONE_TAKE == "one_take"
+        assert EditingMode.PIP == "pip"
+        assert EditingMode.VOICE_OVER == "voice_over"
+        assert EditingMode.VOICE_PIP == "voice_pip"
+
+    def test_total_count(self):
+        assert len(EditingMode) == 4
+
+    def test_is_string_type(self):
+        for mode in EditingMode:
+            assert isinstance(mode.value, str)
+            assert isinstance(mode, str)
+
+    def test_mode_descriptions(self):
+        """验证模式值有意义"""
+        assert "one" in EditingMode.ONE_TAKE
+        assert "pip" in EditingMode.PIP
+        assert "voice" in EditingMode.VOICE_OVER
+        assert "voice" in EditingMode.VOICE_PIP
+
+    def test_usage_in_comparison(self):
+        mode = EditingMode.ONE_TAKE
+        assert mode == "one_take"
+        assert mode != "pip"
+
+    def test_iterable(self):
+        modes = list(EditingMode)
+        assert len(modes) == 4
+        assert EditingMode.ONE_TAKE in modes
diff --git a/tests/unit/test_memory_state_store.py b/tests/unit/test_memory_state_store.py
new file mode 100755
index 000000000..a387d2887
--- /dev/null
+++ b/tests/unit/test_memory_state_store.py
@@ -0,0 +1,142 @@
+"""MemoryStateStore 单元测试 - 微信 OAuth state 存储
+
+覆盖：正常存取、一次性消费、过期清理、并发安全、空 state 处理。
+"""
+
+from __future__ import annotations
+
+import time
+from threading import Thread
+
+import pytest
+
+
+class TestMemoryStateStore:
+    def test_put_and_verify_success(self):
+        """正常存入并校验成功"""
+        from packages.application.auth.wechat_oauth_service import MemoryStateStore
+
+        store = MemoryStateStore()
+        store.put("test_state_123")
+        assert store.verify_and_consume("test_state_123") is True
+
+    def test_verify_nonexistent_state_fails(self):
+        """不存在的 state 校验失败"""
+        from packages.application.auth.wechat_oauth_service import MemoryStateStore
+
+        store = MemoryStateStore()
+        assert store.verify_and_consume("nonexistent") is False
+
+    def test_state_single_use(self):
+        """state 只能消费一次（防重放）"""
+        from packages.application.auth.wechat_oauth_service import MemoryStateStore
+
+        store = MemoryStateStore()
+        store.put("single_use_state")
+        assert store.verify_and_consume("single_use_state") is True
+        assert store.verify_and_consume("single_use_state") is False
+
+    def test_empty_state_rejected(self):
+        """空字符串 state 校验失败"""
+        from packages.application.auth.wechat_oauth_service import MemoryStateStore
+
+        store = MemoryStateStore()
+        store.put("")
+        # 空字符串作为 key 技术上可以存，但业务层应该拒绝
+        # 这里验证 store 本身行为一致性
+        assert store.verify_and_consume("") is True  # 存入了就能通过一次
+        assert store.verify_and_consume("") is False  # 消费后就没了
+
+    def test_expired_state_cleaned(self):
+        """过期 state 会被清理，校验失败"""
+        from packages.application.auth.wechat_oauth_service import MemoryStateStore
+
+        # TTL 设为 0.01 秒，快速过期
+        store = MemoryStateStore(ttl_seconds=0.01)
+        store.put("expire_me")
+        time.sleep(0.02)
+        assert store.verify_and_consume("expire_me") is False
+
+    def test_multiple_states_independent(self):
+        """多个 state 互不影响"""
+        from packages.application.auth.wechat_oauth_service import MemoryStateStore
+
+        store = MemoryStateStore()
+        store.put("state_a")
+        store.put("state_b")
+        store.put("state_c")
+
+        # 消费 b
+        assert store.verify_and_consume("state_b") is True
+        assert store.verify_and_consume("state_b") is False
+
+        # a 和 c 仍然有效
+        assert store.verify_and_consume("state_a") is True
+        assert store.verify_and_consume("state_c") is True
+
+    def test_clean_expired_doesnt_touch_valid(self):
+        """过期清理不影响未过期的 state"""
+        from packages.application.auth.wechat_oauth_service import MemoryStateStore
+
+        store = MemoryStateStore(ttl_seconds=10)
+        store.put("valid_state")
+
+        # 手动触发清理（通过 verify 触发内部 clean_expired）
+        # 由于所有 state 都没过期，清理不影响
+        assert store.verify_and_consume("valid_state") is True
+
+    def test_thread_safety_concurrent_put(self):
+        """并发写入不丢数据"""
+        from packages.application.auth.wechat_oauth_service import MemoryStateStore
+
+        store = MemoryStateStore(ttl_seconds=60)
+        states = [f"state_{i}" for i in range(100)]
+
+        def put_states(states_list):
+            for s in states_list:
+                store.put(s)
+
+        threads = [Thread(target=put_states, args=(states[i * 20 : (i + 1) * 20],)) for i in range(5)]
+        for t in threads:
+            t.start()
+        for t in threads:
+            t.join()
+
+        # 每个 state 都能消费一次
+        for s in states:
+            assert store.verify_and_consume(s) is True
+
+    def test_thread_safety_concurrent_consume(self):
+        """并发消费同一个 state 只有一个能成功"""
+        from packages.application.auth.wechat_oauth_service import MemoryStateStore
+
+        store = MemoryStateStore()
+        store.put("contested_state")
+
+        results = []
+
+        def try_consume():
+            results.append(store.verify_and_consume("contested_state"))
+
+        threads = [Thread(target=try_consume) for _ in range(10)]
+        for t in threads:
+            t.start()
+        for t in threads:
+            t.join()
+
+        # 只有一个成功，其余失败
+        assert sum(1 for r in results if r) == 1
+        assert sum(1 for r in results if not r) == 9
+
+    def test_default_ttl_is_10_minutes(self):
+        """默认 TTL 是 600 秒（10分钟）"""
+        from packages.application.auth.wechat_oauth_service import (
+            STATE_TTL_SECONDS,
+            MemoryStateStore,
+        )
+
+        assert STATE_TTL_SECONDS == 600
+        store = MemoryStateStore()
+        # 验证默认值生效：存入后立即验证应该通过
+        store.put("default_ttl_test")
+        assert store.verify_and_consume("default_ttl_test") is True
diff --git a/tests/unit/test_recipe_domain.py b/tests/unit/test_recipe_domain.py
new file mode 100755
index 000000000..fd903a3bb
--- /dev/null
+++ b/tests/unit/test_recipe_domain.py
@@ -0,0 +1,84 @@
+"""
+Recipe 配方领域模型单元测试
+"""
+
+from packages.domain.recipe import Recipe, RecipeItem
+
+
+class TestRecipeItem:
+    """RecipeItem 测试"""
+
+    def test_create_item(self):
+        item = RecipeItem(
+            id="item-1",
+            recipe_id="recipe-1",
+            item_type="asset",
+            item_id="asset-123",
+            position=0,
+        )
+        assert item.id == "item-1"
+        assert item.recipe_id == "recipe-1"
+        assert item.item_type == "asset"
+        assert item.item_id == "asset-123"
+        assert item.position == 0
+        assert item.metadata_ == {}
+
+    def test_item_with_metadata(self):
+        item = RecipeItem(
+            id="item-1",
+            recipe_id="r1",
+            item_type="voice",
+            item_id="voice-1",
+            position=2,
+            metadata_={"speed": 1.0, "pitch": 0},
+        )
+        assert item.metadata_["speed"] == 1.0
+        assert item.metadata_["pitch"] == 0
+
+
+class TestRecipe:
+    """Recipe 测试"""
+
+    def test_create_minimal(self):
+        r = Recipe(id="r1", user_id="u1", name="我的配方")
+        assert r.id == "r1"
+        assert r.user_id == "u1"
+        assert r.name == "我的配方"
+
+    def test_default_values(self):
+        r = Recipe(id="r1", user_id="u1", name="n")
+        assert r.description == ""
+        assert r.template_id == ""
+        assert r.generation_params == {}
+        assert r.items == []
+        assert r.is_active is True
+        assert r.metadata_ == {}
+
+    def test_with_items(self):
+        items = [
+            RecipeItem(id="i1", recipe_id="r1", item_type="asset", item_id="a1", position=0),
+            RecipeItem(id="i2", recipe_id="r1", item_type="title", item_id="t1", position=1),
+        ]
+        r = Recipe(id="r1", user_id="u1", name="n", items=items)
+        assert len(r.items) == 2
+        assert r.items[0].item_type == "asset"
+        assert r.items[1].item_type == "title"
+
+    def test_with_generation_params(self):
+        params = {"mode": "one_take", "duration": 30}
+        r = Recipe(id="r1", user_id="u1", name="n", generation_params=params)
+        assert r.generation_params["mode"] == "one_take"
+
+    def test_recipe_inactive(self):
+        r = Recipe(id="r1", user_id="u1", name="n", is_active=False)
+        assert r.is_active is False
+
+    def test_has_timestamps(self):
+        r = Recipe(id="r1", user_id="u1", name="n")
+        assert r.created_at is not None
+        assert r.updated_at is not None
+
+    def test_all_item_types(self):
+        for itype in ["asset", "title", "voice"]:
+            item = RecipeItem(id="i1", recipe_id="r1", item_type=itype, item_id="x", position=0)
+            assert item.item_type == itype
diff --git a/tests/unit/test_tag_domain.py b/tests/unit/test_tag_domain.py
new file mode 100755
index 000000000..d9b4e580a
--- /dev/null
+++ b/tests/unit/test_tag_domain.py
@@ -0,0 +1,34 @@
+"""
+Tag 标签领域模型单元测试
+"""
+
+import pytest
+
+from packages.domain.tag import Tag
+
+
+class TestTagCreate:
+    """创建标签测试"""
+
+    def test_create_basic(self):
+        tag = Tag.create(user_id="user-1", name="风景")
+        assert tag.id is not None
+        assert len(tag.id) == 32
+        assert tag.user_id == "user-1"
+        assert tag.name == "风景"
+
+    def test_create_strips_name(self):
+        tag = Tag.create(user_id="user-1", name="  风景  ")
+        assert tag.name == "风景"
+
+    def test_create_empty_name_raises(self):
+        with pytest.raises(ValueError, match="标签名称不能为空"):
+            Tag.create(user_id="user-1", name="")
+
+    def test_create_whitespace_name_raises(self):
+        with pytest.raises(ValueError, match="标签名称不能为空"):
+            Tag.create(user_id="user-1", name="   ")
+
+    def test_create_has_created_at(self):
+        tag = Tag.create(user_id="user-1", name="美食")
+        assert tag.created_at is not None
diff --git a/tests/unit/test_title_library_domain.py b/tests/unit/test_title_library_domain.py
new file mode 100755
index 000000000..b5a680f11
--- /dev/null
+++ b/tests/unit/test_title_library_domain.py
@@ -0,0 +1,78 @@
+"""
+TitleLibraryItem 标题库领域模型单元测试
+"""
+
+from packages.domain.title_library import TitleLibraryItem
+
+
+class TestTitleLibraryItem:
+    """TitleLibraryItem 测试"""
+
+    def test_create_minimal(self):
+        item = TitleLibraryItem(id="t1", user_id="u1", name="标题1", text="这是标题文本")
+        assert item.id == "t1"
+        assert item.user_id == "u1"
+        assert item.name == "标题1"
+        assert item.text == "这是标题文本"
+
+    def test_default_values(self):
+        item = TitleLibraryItem(id="t1", user_id="u1", name="n", text="t")
+        assert item.category == "default"
+        assert item.description == ""
+        assert item.tags == []
+        assert item.usage_count == 0
+        assert item.is_active is True
+        assert item.metadata_ == {}
+
+    def test_with_category(self):
+        item = TitleLibraryItem(
+            id="t1",
+            user_id="u1",
+            name="n",
+            text="t",
+            category="美食",
+        )
+        assert item.category == "美食"
+
+    def test_with_tags(self):
+        item = TitleLibraryItem(
+            id="t1",
+            user_id="u1",
+            name="n",
+            text="t",
+            tags=["爆款", "美食"],
+        )
+        assert len(item.tags) == 2
+        assert "爆款" in item.tags
+
+    def test_usage_count(self):
+        item = TitleLibraryItem(id="t1", user_id="u1", name="n", text="t")
+        assert item.usage_count == 0
+        item.usage_count = 10
+        assert item.usage_count == 10
+
+    def test_inactive(self):
+        item = TitleLibraryItem(
+            id="t1",
+            user_id="u1",
+            name="n",
+            text="t",
+            is_active=False,
+        )
+        assert item.is_active is False
+
+    def test_with_metadata(self):
+        meta = {"source": "import", "quality": "high"}
+        item = TitleLibraryItem(
+            id="t1",
+            user_id="u1",
+            name="n",
+            text="t",
+            metadata_=meta,
+        )
+        assert item.metadata_["source"] == "import"
+
+    def test_has_timestamps(self):
+        item = TitleLibraryItem(id="t1", user_id="u1", name="n", text="t")
+        assert item.created_at is not None
+        assert item.updated_at is not None
diff --git a/tests/unit/test_voice_library_domain.py b/tests/unit/test_voice_library_domain.py
new file mode 100755
index 000000000..9ebe1b6e3
--- /dev/null
+++ b/tests/unit/test_voice_library_domain.py
@@ -0,0 +1,95 @@
+"""
+VoiceLibraryItem 配音库领域模型单元测试
+"""
+
+from packages.domain.voice_library import VoiceLibraryItem
+
+
+class TestVoiceLibraryItem:
+    """VoiceLibraryItem 测试"""
+
+    def test_create_minimal(self):
+        item = VoiceLibraryItem(id="v1", user_id="u1", name="我的配音")
+        assert item.id == "v1"
+        assert item.user_id == "u1"
+        assert item.name == "我的配音"
+
+    def test_default_values(self):
+        item = VoiceLibraryItem(id="v1", user_id="u1", name="n")
+        assert item.text == ""
+        assert item.voice_provider == ""
+        assert item.voice_id == ""
+        assert item.voice_name == ""
+        assert item.audio_url == ""
+        assert item.duration == 0
+        assert item.file_size == 0
+        assert item.status == "completed"
+        assert item.project_id is None
+        assert item.tags == []
+        assert item.metadata_ == {}
+
+    def test_with_voice_info(self):
+        item = VoiceLibraryItem(
+            id="v1",
+            user_id="u1",
+            name="温柔女声",
+            text="大家好",
+            voice_provider="cosyvoice",
+            voice_id="longxiaochun_v3",
+            voice_name="龙小淳",
+        )
+        assert item.voice_provider == "cosyvoice"
+        assert item.voice_id == "longxiaochun_v3"
+        assert item.voice_name == "龙小淳"
+
+    def test_with_audio_info(self):
+        item = VoiceLibraryItem(
+            id="v1",
+            user_id="u1",
+            name="n",
+            audio_url="https://example.com/audio.wav",
+            duration=15.5,
+            file_size=102400,
+        )
+        assert item.audio_url == "https://example.com/audio.wav"
+        assert item.duration == 15.5
+        assert item.file_size == 102400
+
+    def test_with_project_id(self):
+        item = VoiceLibraryItem(
+            id="v1",
+            user_id="u1",
+            name="n",
+            project_id="proj-123",
+        )
+        assert item.project_id == "proj-123"
+
+    def test_status_values(self):
+        for status in ["pending", "processing", "completed", "failed"]:
+            item = VoiceLibraryItem(id="v1", user_id="u1", name="n", status=status)
+            assert item.status == status
+
+    def test_with_tags(self):
+        item = VoiceLibraryItem(
+            id="v1",
+            user_id="u1",
+            name="n",
+            tags=["温柔", "女声", "解说"],
+        )
+        assert len(item.tags) == 3
+        assert "温柔" in item.tags
+
+    def test_with_metadata(self):
+        item = VoiceLibraryItem(
+            id="v1",
+            user_id="u1",
+            name="n",
+            metadata_={"speed": 1.0, "pitch": 0.5},
+        )
+        assert item.metadata_["speed"] == 1.0
+        assert item.metadata_["pitch"] == 0.5
+
+    def test_has_timestamps(self):
+        item = VoiceLibraryItem(id="v1", user_id="u1", name="n")
+        assert item.created_at is not None
+        assert item.updated_at is not None