diff --git a/tests/unit/test_config_schemas.py b/tests/unit/test_config_schemas.py
new file mode 100755
index 000000000..addac1f80
--- /dev/null
+++ b/tests/unit/test_config_schemas.py
@@ -0,0 +1,508 @@
+"""config_schemas 领域层单元测试 - 配置 schema / 枚举 / 标准化函数"""
+
+import copy
+
+import pytest
+from pydantic import ValidationError
+
+from packages.domain.config_schemas import (
+    BGMSource,
+    BGMConfig,
+    CoverConfig,
+    CoverType,
+    DEFAULT_EDIT_PLAN_CONFIG,
+    DEFAULT_EDIT_TEMPLATE_CONFIG,
+    EditPlanConfigSchema,
+    EditTemplateConfigSchema,
+    ExportConfig,
+    FilterConfig,
+    ShadowConfig,
+    StrokeConfig,
+    SubtitleConfig,
+    TextAnimation,
+    TextPosition,
+    TitleConfig,
+    normalize_plan_config,
+    normalize_template_config,
+)
+
+
+class TestEnums:
+    """枚举类型测试"""
+
+    def test_cover_type_values(self):
+        assert CoverType.AI_FRAME == "ai_frame"
+        assert CoverType.MANUAL == "manual"
+        assert CoverType.UPLOAD == "upload"
+        assert CoverType.AI_REGENERATE == "ai_regenerate"
+
+    def test_text_position_values(self):
+        assert TextPosition.TOP == "top"
+        assert TextPosition.CENTER == "center"
+        assert TextPosition.BOTTOM == "bottom"
+
+    def test_text_animation_values(self):
+        assert TextAnimation.NONE == "none"
+        assert TextAnimation.FADE_IN == "fade_in"
+        assert TextAnimation.SLIDE_UP == "slide_up"
+        assert TextAnimation.SLIDE_DOWN == "slide_down"
+        assert TextAnimation.SCALE == "scale"
+
+    def test_bgm_source_values(self):
+        assert BGMSource.LIBRARY == "library"
+        assert BGMSource.UPLOAD == "upload"
+        assert BGMSource.AI_RECOMMEND == "ai_recommend"
+
+    def test_enums_are_str_enum(self):
+        """枚举都是 str 类型"""
+        assert isinstance(CoverType.AI_FRAME, str)
+        assert isinstance(TextPosition.TOP, str)
+        assert isinstance(TextAnimation.FADE_IN, str)
+        assert isinstance(BGMSource.LIBRARY, str)
+
+
+class TestStrokeConfig:
+    """StrokeConfig 测试"""
+
+    def test_defaults(self):
+        config = StrokeConfig()
+        assert config.enabled is False
+        assert config.color == "#000000"
+        assert config.width == 1
+
+    def test_width_min(self):
+        config = StrokeConfig(width=1)
+        assert config.width == 1
+
+    def test_width_max(self):
+        config = StrokeConfig(width=10)
+        assert config.width == 10
+
+    def test_width_below_min_raises(self):
+        with pytest.raises(ValidationError):
+            StrokeConfig(width=0)
+
+    def test_width_above_max_raises(self):
+        with pytest.raises(ValidationError):
+            StrokeConfig(width=11)
+
+
+class TestShadowConfig:
+    """ShadowConfig 测试"""
+
+    def test_defaults(self):
+        config = ShadowConfig()
+        assert config.enabled is False
+        assert config.blur == 4
+        assert config.offset_x == 2
+        assert config.offset_y == 2
+
+    def test_blur_min(self):
+        config = ShadowConfig(blur=0)
+        assert config.blur == 0
+
+    def test_blur_max(self):
+        config = ShadowConfig(blur=20)
+        assert config.blur == 20
+
+    def test_blur_below_min_raises(self):
+        with pytest.raises(ValidationError):
+            ShadowConfig(blur=-1)
+
+    def test_blur_above_max_raises(self):
+        with pytest.raises(ValidationError):
+            ShadowConfig(blur=21)
+
+
+class TestCoverConfig:
+    """CoverConfig 测试"""
+
+    def test_defaults(self):
+        config = CoverConfig()
+        assert config.type == CoverType.AI_FRAME
+        assert config.image_url == ""
+        assert config.frame_time is None
+
+    def test_frame_time_ge_zero(self):
+        config = CoverConfig(frame_time=0.0)
+        assert config.frame_time == 0.0
+
+    def test_frame_time_negative_raises(self):
+        with pytest.raises(ValidationError):
+            CoverConfig(frame_time=-1.0)
+
+    def test_custom_values(self):
+        config = CoverConfig(
+            type=CoverType.MANUAL,
+            image_url="http://example.com/cover.jpg",
+            frame_time=5.5,
+        )
+        assert config.type == CoverType.MANUAL
+        assert config.image_url == "http://example.com/cover.jpg"
+        assert config.frame_time == 5.5
+
+
+class TestTitleConfig:
+    """TitleConfig 测试"""
+
+    def test_defaults(self):
+        config = TitleConfig()
+        assert config.enabled is True
+        assert config.ai_auto is True
+        assert config.text == ""
+        assert config.position == TextPosition.TOP
+        assert config.font == "思源黑体"
+        assert config.color == "#ffffff"
+        assert config.size == 48
+        assert config.bold is True
+        assert config.italic is False
+        assert isinstance(config.stroke, StrokeConfig)
+        assert isinstance(config.shadow, ShadowConfig)
+
+    def test_size_min(self):
+        config = TitleConfig(size=12)
+        assert config.size == 12
+
+    def test_size_max(self):
+        config = TitleConfig(size=120)
+        assert config.size == 120
+
+    def test_size_below_min_raises(self):
+        with pytest.raises(ValidationError):
+            TitleConfig(size=11)
+
+    def test_size_above_max_raises(self):
+        with pytest.raises(ValidationError):
+            TitleConfig(size=121)
+
+
+class TestSubtitleConfig:
+    """SubtitleConfig 测试"""
+
+    def test_defaults(self):
+        config = SubtitleConfig()
+        assert config.enabled is True
+        assert config.position == TextPosition.BOTTOM
+        assert config.font == "思源黑体"
+        assert config.color == "#ffffff"
+        assert config.size == 24
+        assert config.animation == TextAnimation.FADE_IN
+        assert config.auto_generated is False
+        assert config.language == ""
+        assert config.max_chars_per_line == 20
+        assert config.min_chars_per_segment == 8
+
+    def test_size_min(self):
+        config = SubtitleConfig(size=12)
+        assert config.size == 12
+
+    def test_size_max(self):
+        config = SubtitleConfig(size=60)
+        assert config.size == 60
+
+    def test_size_out_of_range_raises(self):
+        with pytest.raises(ValidationError):
+            SubtitleConfig(size=61)
+
+    def test_max_chars_per_line_range(self):
+        config = SubtitleConfig(max_chars_per_line=40)
+        assert config.max_chars_per_line == 40
+        with pytest.raises(ValidationError):
+            SubtitleConfig(max_chars_per_line=7)
+        with pytest.raises(ValidationError):
+            SubtitleConfig(max_chars_per_line=41)
+
+    def test_min_chars_per_segment_range(self):
+        config = SubtitleConfig(min_chars_per_segment=20)
+        assert config.min_chars_per_segment == 20
+        with pytest.raises(ValidationError):
+            SubtitleConfig(min_chars_per_segment=1)
+        with pytest.raises(ValidationError):
+            SubtitleConfig(min_chars_per_segment=21)
+
+
+class TestBGMConfig:
+    """BGMConfig 测试"""
+
+    def test_defaults(self):
+        config = BGMConfig()
+        assert config.enabled is False
+        assert config.source == BGMSource.LIBRARY
+        assert config.asset_id == ""
+        assert config.preset_id == ""
+        assert config.audio_url == ""
+        assert config.volume == 0.3
+        assert config.fade_in == 0.0
+        assert config.fade_out == 0.0
+        assert config.loop_enabled is True
+        assert config.sidechain_enabled is False
+        assert config.sidechain_ratio == 0.3
+        assert config.sidechain_attack == 0.02
+        assert config.sidechain_release == 0.5
+        assert config.sidechain_threshold == -25.0
+
+    def test_volume_range(self):
+        with pytest.raises(ValidationError):
+            BGMConfig(volume=-0.1)
+        with pytest.raises(ValidationError):
+            BGMConfig(volume=1.1)
+
+    def test_fade_range(self):
+        with pytest.raises(ValidationError):
+            BGMConfig(fade_in=31.0)
+        with pytest.raises(ValidationError):
+            BGMConfig(fade_out=31.0)
+
+    def test_sidechain_ratio_range(self):
+        with pytest.raises(ValidationError):
+            BGMConfig(sidechain_ratio=1.1)
+        with pytest.raises(ValidationError):
+            BGMConfig(sidechain_ratio=-0.1)
+
+    def test_sidechain_attack_range(self):
+        with pytest.raises(ValidationError):
+            BGMConfig(sidechain_attack=0.0001)
+        with pytest.raises(ValidationError):
+            BGMConfig(sidechain_attack=1.1)
+
+    def test_sidechain_release_range(self):
+        with pytest.raises(ValidationError):
+            BGMConfig(sidechain_release=0.001)
+        with pytest.raises(ValidationError):
+            BGMConfig(sidechain_release=5.1)
+
+    def test_sidechain_threshold_range(self):
+        with pytest.raises(ValidationError):
+            BGMConfig(sidechain_threshold=-61.0)
+        with pytest.raises(ValidationError):
+            BGMConfig(sidechain_threshold=1.0)
+
+
+class TestExportConfig:
+    """ExportConfig 测试"""
+
+    def test_defaults(self):
+        config = ExportConfig()
+        assert config.resolution == "1080x1920"
+        assert config.fps == 30
+        assert config.video_bitrate == 8000
+        assert config.audio_bitrate == 128
+        assert config.format == "mp4"
+        assert config.quality_preset == "balanced"
+        assert config.watermark_enabled is False
+        assert config.watermark_text == ""
+
+    def test_fps_range(self):
+        with pytest.raises(ValidationError):
+            ExportConfig(fps=14)
+        with pytest.raises(ValidationError):
+            ExportConfig(fps=61)
+
+    def test_video_bitrate_range(self):
+        with pytest.raises(ValidationError):
+            ExportConfig(video_bitrate=999)
+        with pytest.raises(ValidationError):
+            ExportConfig(video_bitrate=20001)
+
+    def test_audio_bitrate_range(self):
+        with pytest.raises(ValidationError):
+            ExportConfig(audio_bitrate=63)
+        with pytest.raises(ValidationError):
+            ExportConfig(audio_bitrate=321)
+
+
+class TestFilterConfig:
+    """FilterConfig 测试"""
+
+    def test_defaults(self):
+        config = FilterConfig()
+        assert config.enabled is False
+        assert config.preset_id == "filter_none"
+        assert config.intensity == 100
+        assert config.brightness == 0.0
+        assert config.contrast == 1.0
+        assert config.saturation == 1.0
+        assert config.warmth == 0.0
+
+    def test_intensity_range(self):
+        with pytest.raises(ValidationError):
+            FilterConfig(intensity=-1)
+        with pytest.raises(ValidationError):
+            FilterConfig(intensity=101)
+
+    def test_brightness_range(self):
+        with pytest.raises(ValidationError):
+            FilterConfig(brightness=-1.1)
+        with pytest.raises(ValidationError):
+            FilterConfig(brightness=1.1)
+
+    def test_contrast_range(self):
+        with pytest.raises(ValidationError):
+            FilterConfig(contrast=-0.1)
+        with pytest.raises(ValidationError):
+            FilterConfig(contrast=2.1)
+
+    def test_saturation_range(self):
+        with pytest.raises(ValidationError):
+            FilterConfig(saturation=-0.1)
+        with pytest.raises(ValidationError):
+            FilterConfig(saturation=3.1)
+
+    def test_warmth_range(self):
+        with pytest.raises(ValidationError):
+            FilterConfig(warmth=-1.1)
+        with pytest.raises(ValidationError):
+            FilterConfig(warmth=1.1)
+
+
+class TestEditPlanConfigSchema:
+    """EditPlanConfigSchema 完整配置测试"""
+
+    def test_defaults(self):
+        config = EditPlanConfigSchema()
+        assert isinstance(config.cover, CoverConfig)
+        assert isinstance(config.title, TitleConfig)
+        assert isinstance(config.subtitle, SubtitleConfig)
+        assert isinstance(config.bgm, BGMConfig)
+        assert isinstance(config.export, ExportConfig)
+        assert isinstance(config.filter, FilterConfig)
+        assert config.editing_mode == "one_take"
+
+    def test_partial_update(self):
+        """部分字段更新，其他保持默认"""
+        config = EditPlanConfigSchema(
+            title={"text": "自定义标题", "size": 36},
+            bgm={"enabled": True, "volume": 0.5},
+        )
+        assert config.title.text == "自定义标题"
+        assert config.title.size == 36
+        assert config.title.font == "思源黑体"  # 其他字段默认
+        assert config.bgm.enabled is True
+        assert config.bgm.volume == 0.5
+        assert config.cover.type == CoverType.AI_FRAME  # 未设置的保持默认
+
+
+class TestEditTemplateConfigSchema:
+    """EditTemplateConfigSchema 测试"""
+
+    def test_defaults(self):
+        config = EditTemplateConfigSchema()
+        assert isinstance(config.cover, CoverConfig)
+        assert config.editing_mode == "one_take"
+        assert config.transition_enabled is True
+
+    def test_custom_transition_enabled(self):
+        config = EditTemplateConfigSchema(transition_enabled=False)
+        assert config.transition_enabled is False
+
+
+class TestDefaultConfigs:
+    """默认配置常量测试"""
+
+    def test_plan_config_structure(self):
+        assert "cover" in DEFAULT_EDIT_PLAN_CONFIG
+        assert "title" in DEFAULT_EDIT_PLAN_CONFIG
+        assert "subtitle" in DEFAULT_EDIT_PLAN_CONFIG
+        assert "bgm" in DEFAULT_EDIT_PLAN_CONFIG
+        assert "export" in DEFAULT_EDIT_PLAN_CONFIG
+        assert "filter" in DEFAULT_EDIT_PLAN_CONFIG
+        assert "editing_mode" in DEFAULT_EDIT_PLAN_CONFIG
+
+    def test_template_config_has_transition_enabled(self):
+        assert "transition_enabled" in DEFAULT_EDIT_TEMPLATE_CONFIG
+        assert DEFAULT_EDIT_TEMPLATE_CONFIG["transition_enabled"] is True
+
+    def test_template_inherits_from_plan(self):
+        """模板配置继承计划配置的所有字段"""
+        for key in DEFAULT_EDIT_PLAN_CONFIG:
+            assert key in DEFAULT_EDIT_TEMPLATE_CONFIG
+
+
+class TestNormalizePlanConfig:
+    """normalize_plan_config 工具函数测试"""
+
+    def test_none_returns_default_copy(self):
+        result = normalize_plan_config(None)
+        assert result == DEFAULT_EDIT_PLAN_CONFIG
+        # 确保是深拷贝
+        result["title"]["text"] = "modified"
+        assert DEFAULT_EDIT_PLAN_CONFIG["title"]["text"] == ""
+
+    def test_empty_dict_returns_default(self):
+        result = normalize_plan_config({})
+        assert result == DEFAULT_EDIT_PLAN_CONFIG
+
+    def test_updates_cover_section(self):
+        result = normalize_plan_config({"cover": {"type": "manual", "frame_time": 5.0}})
+        assert result["cover"]["type"] == "manual"
+        assert result["cover"]["frame_time"] == 5.0
+        assert result["cover"]["image_url"] == ""  # 默认保留
+
+    def test_updates_title_section(self):
+        result = normalize_plan_config({"title": {"text": "hello", "size": 32}})
+        assert result["title"]["text"] == "hello"
+        assert result["title"]["size"] == 32
+        assert result["title"]["font"] == "思源黑体"
+
+    def test_updates_bgm_section(self):
+        result = normalize_plan_config({"bgm": {"enabled": True, "volume": 0.8}})
+        assert result["bgm"]["enabled"] is True
+        assert result["bgm"]["volume"] == 0.8
+
+    def test_updates_editing_mode(self):
+        result = normalize_plan_config({"editing_mode": "smart"})
+        assert result["editing_mode"] == "smart"
+
+    def test_preserves_extra_fields(self):
+        """非标准字段被保留"""
+        result = normalize_plan_config({"custom_field": "value", "generation_task_id": "task-1"})
+        assert result["custom_field"] == "value"
+        assert result["generation_task_id"] == "task-1"
+
+    def test_ignores_non_dict_section(self):
+        """section 不是 dict 时忽略"""
+        result = normalize_plan_config({"cover": "not_a_dict"})
+        assert result["cover"] == DEFAULT_EDIT_PLAN_CONFIG["cover"]
+
+    def test_ignores_non_str_editing_mode(self):
+        result = normalize_plan_config({"editing_mode": 123})
+        assert result["editing_mode"] == "one_take"
+
+    def test_deep_copy_independence(self):
+        """修改结果不影响默认值"""
+        result = normalize_plan_config({})
+        result["title"]["size"] = 999
+        assert DEFAULT_EDIT_PLAN_CONFIG["title"]["size"] == 48
+
+
+class TestNormalizeTemplateConfig:
+    """normalize_template_config 工具函数测试"""
+
+    def test_none_returns_default_copy(self):
+        result = normalize_template_config(None)
+        assert result == DEFAULT_EDIT_TEMPLATE_CONFIG
+
+    def test_updates_transition_enabled(self):
+        result = normalize_template_config({"transition_enabled": False})
+        assert result["transition_enabled"] is False
+
+    def test_ignores_non_bool_transition_enabled(self):
+        result = normalize_template_config({"transition_enabled": "yes"})
+        assert result["transition_enabled"] is True
+
+    def test_updates_sections(self):
+        result = normalize_template_config({
+            "title": {"text": "模板标题"},
+            "bgm": {"enabled": True},
+        })
+        assert result["title"]["text"] == "模板标题"
+        assert result["bgm"]["enabled"] is True
+
+    def test_preserves_extra_fields(self):
+        result = normalize_template_config({"custom": "value"})
+        assert result["custom"] == "value"
+
+    def test_deep_copy_independence(self):
+        result = normalize_template_config({})
+        result["title"]["font"] = "CustomFont"
+        assert DEFAULT_EDIT_TEMPLATE_CONFIG["title"]["font"] == "思源黑体"
diff --git a/tests/unit/test_filter_presets.py b/tests/unit/test_filter_presets.py
new file mode 100755
index 000000000..903bc0ac2
--- /dev/null
+++ b/tests/unit/test_filter_presets.py
@@ -0,0 +1,230 @@
+"""filter_presets 领域层单元测试 - 滤镜预设库"""
+
+import pytest
+
+from packages.domain.filter_presets import (
+    FILTER_PRESET_LIBRARY,
+    FilterPreset,
+    build_ffmpeg_filter,
+    get_filter_preset,
+    list_filter_presets,
+)
+
+
+class TestFilterPreset:
+    """FilterPreset 数据类测试"""
+
+    def test_create_minimal(self):
+        preset = FilterPreset(id="test", name="测试", category="basic")
+        assert preset.id == "test"
+        assert preset.name == "测试"
+        assert preset.category == "basic"
+        assert preset.description == ""
+        assert preset.tags == []
+        assert preset.brightness == 0.0
+        assert preset.contrast == 1.0
+        assert preset.saturation == 1.0
+        assert preset.gamma == 1.0
+        assert preset.gamma_r == 1.0
+        assert preset.gamma_g == 1.0
+        assert preset.gamma_b == 1.0
+        assert preset.hue == 0.0
+        assert preset.lut_url == ""
+
+    def test_create_with_all_params(self):
+        preset = FilterPreset(
+            id="custom",
+            name="自定义",
+            category="cinematic",
+            description="电影感调色",
+            tags=["电影", "调色"],
+            brightness=0.1,
+            contrast=1.2,
+            saturation=0.9,
+            gamma=1.1,
+            gamma_r=1.05,
+            gamma_g=1.0,
+            gamma_b=0.95,
+            hue=10.0,
+            lut_url="http://example.com/lut.png",
+        )
+        assert preset.category == "cinematic"
+        assert preset.description == "电影感调色"
+        assert preset.tags == ["电影", "调色"]
+        assert preset.brightness == 0.1
+        assert preset.contrast == 1.2
+        assert preset.lut_url == "http://example.com/lut.png"
+
+    def test_frozen_immutable(self):
+        """frozen dataclass 不可修改"""
+        preset = FilterPreset(id="test", name="测试", category="basic")
+        with pytest.raises(Exception):  # FrozenInstanceError
+            preset.name = "改名"
+
+    def test_tags_default_empty_list(self):
+        preset = FilterPreset(id="test", name="测试", category="basic")
+        assert preset.tags == []
+        # 每次创建独立的 list
+        preset2 = FilterPreset(id="test2", name="测试2", category="basic")
+        assert preset.tags is not preset2.tags
+
+
+class TestFilterPresetLibrary:
+    """FILTER_PRESET_LIBRARY 预设库测试"""
+
+    def test_library_not_empty(self):
+        assert len(FILTER_PRESET_LIBRARY) > 0
+
+    def test_all_presets_have_unique_ids(self):
+        """所有预设 ID 唯一"""
+        ids = [p.id for p in FILTER_PRESET_LIBRARY]
+        assert len(ids) == len(set(ids))
+
+    def test_all_presets_have_name_and_category(self):
+        for preset in FILTER_PRESET_LIBRARY:
+            assert preset.id, f"{preset} has no id"
+            assert preset.name, f"{preset.id} has no name"
+            assert preset.category, f"{preset.id} has no category"
+
+    def test_filter_none_exists(self):
+        """原图预设存在"""
+        none_preset = next((p for p in FILTER_PRESET_LIBRARY if p.id == "filter_none"), None)
+        assert none_preset is not None
+        assert none_preset.name == "原图"
+        assert none_preset.category == "basic"
+
+    def test_known_categories_exist(self):
+        """已知分类都有预设"""
+        categories = {p.category for p in FILTER_PRESET_LIBRARY}
+        assert "basic" in categories
+
+    def test_basic_category_presets(self):
+        """基础分类至少有几个预设"""
+        basic = [p for p in FILTER_PRESET_LIBRARY if p.category == "basic"]
+        assert len(basic) >= 3
+
+    def test_preset_params_in_reasonable_range(self):
+        """预设参数在合理范围内"""
+        for preset in FILTER_PRESET_LIBRARY:
+            assert -1.0 <= preset.brightness <= 1.0, f"{preset.id} brightness out of range"
+            assert 0.0 <= preset.contrast <= 2.0, f"{preset.id} contrast out of range"
+            assert 0.0 <= preset.saturation <= 3.0, f"{preset.id} saturation out of range"
+
+
+class TestGetFilterPreset:
+    """get_filter_preset 函数测试"""
+
+    def test_get_existing_preset(self):
+        preset = get_filter_preset("filter_none")
+        assert preset is not None
+        assert preset.id == "filter_none"
+
+    def test_get_nonexistent_preset(self):
+        assert get_filter_preset("nonexistent_filter") is None
+
+    def test_get_returns_correct_type(self):
+        preset = get_filter_preset("filter_none")
+        assert isinstance(preset, FilterPreset)
+
+
+class TestListFilterPresets:
+    """list_filter_presets 函数测试"""
+
+    def test_list_all(self):
+        """不带参数返回所有预设"""
+        all_presets = list_filter_presets()
+        assert len(all_presets) == len(FILTER_PRESET_LIBRARY)
+
+    def test_filter_by_category(self):
+        """按分类筛选"""
+        basic_presets = list_filter_presets(category="basic")
+        assert len(basic_presets) > 0
+        assert all(p.category == "basic" for p in basic_presets)
+
+    def test_filter_by_nonexistent_category(self):
+        """不存在的分类返回空列表"""
+        result = list_filter_presets(category="nonexistent_category")
+        assert result == []
+
+    def test_search_by_name(self):
+        """按名称搜索"""
+        result = list_filter_presets(keyword="明")
+        assert len(result) >= 1
+        assert any("明" in p.name for p in result)
+
+    def test_search_by_tag(self):
+        """按标签搜索"""
+        # 找到有标签的预设
+        tagged = [p for p in FILTER_PRESET_LIBRARY if p.tags]
+        if tagged:
+            tag = tagged[0].tags[0]
+            result = list_filter_presets(keyword=tag)
+            assert len(result) >= 1
+
+    def test_search_case_insensitive_in_name(self):
+        """搜索对中文名称有效"""
+        result = list_filter_presets(keyword="原图")
+        assert any(p.id == "filter_none" for p in result)
+
+    def test_search_empty_returns_all(self):
+        """空搜索返回所有"""
+        result = list_filter_presets(keyword="")
+        assert len(result) == len(FILTER_PRESET_LIBRARY)
+
+    def test_combined_category_and_search(self):
+        """同时按分类和搜索筛选"""
+        result = list_filter_presets(category="basic", keyword="明")
+        assert all(p.category == "basic" for p in result)
+        if result:
+            assert any("明" in p.name or any("明" in t for t in p.tags) for p in result)
+
+    def test_returns_list_of_filterpreset(self):
+        result = list_filter_presets()
+        assert all(isinstance(p, FilterPreset) for p in result)
+
+
+class TestBuildFfmpegFilter:
+    """build_ffmpeg_filter 函数测试"""
+
+    def test_filter_none_returns_empty_or_simple(self):
+        """原图滤镜应该返回空字符串或无操作滤镜"""
+        result = build_ffmpeg_filter("filter_none", 100)
+        # 应该是字符串，且不包含实质性调色参数
+        assert isinstance(result, str)
+
+    def test_full_intensity(self):
+        """强度 100 时应用全量参数"""
+        result = build_ffmpeg_filter("filter_brighten", 100)
+        assert isinstance(result, str)
+        assert len(result) > 0
+
+    def test_zero_intensity(self):
+        """强度 0 时应该是原图效果"""
+        result = build_ffmpeg_filter("filter_brighten", 0)
+        assert isinstance(result, str)
+
+    def test_half_intensity(self):
+        """强度 50 时参数减半"""
+        result50 = build_ffmpeg_filter("filter_brighten", 50)
+        result100 = build_ffmpeg_filter("filter_brighten", 100)
+        # 50% 和 100% 的结果应该不同
+        assert result50 != result100
+
+    def test_nonexistent_preset(self):
+        """不存在的预设返回空字符串或默认值"""
+        result = build_ffmpeg_filter("nonexistent", 100)
+        assert isinstance(result, str)
+
+    def test_intensity_clamped(self):
+        """强度超过 100 或低于 0 的处理"""
+        result_high = build_ffmpeg_filter("filter_brighten", 150)
+        result_low = build_ffmpeg_filter("filter_brighten", -10)
+        assert isinstance(result_high, str)
+        assert isinstance(result_low, str)
+
+    def test_contains_eq_filter(self):
+        """结果应该包含 eq 滤镜参数"""
+        result = build_ffmpeg_filter("filter_brighten", 100)
+        # FFmpeg eq 滤镜通常包含 brightness/contrast/saturation 等参数
+        # 至少应该有滤镜相关的字符串
+        assert len(result) > 0
diff --git a/tests/unit/test_transition_presets.py b/tests/unit/test_transition_presets.py
new file mode 100755
index 000000000..59ca70434
--- /dev/null
+++ b/tests/unit/test_transition_presets.py
@@ -0,0 +1,209 @@
+"""transition_presets 领域层单元测试 - 转场预设库"""
+
+import pytest
+
+from packages.domain.transition_presets import (
+    TRANSITION_PRESET_LIBRARY,
+    TransitionPreset,
+    get_default_transition,
+    get_transition_preset,
+    list_transition_presets,
+)
+
+
+class TestTransitionPreset:
+    """TransitionPreset 数据类测试"""
+
+    def test_create_minimal(self):
+        preset = TransitionPreset(id="test", name="测试", category="basic", transition="fade")
+        assert preset.id == "test"
+        assert preset.name == "测试"
+        assert preset.category == "basic"
+        assert preset.transition == "fade"
+        assert preset.description == ""
+        assert preset.tags == []
+        assert preset.default_duration == 0.5
+        assert preset.min_duration == 0.1
+        assert preset.max_duration == 3.0
+        assert preset.has_custom_params is False
+
+    def test_create_with_all_params(self):
+        preset = TransitionPreset(
+            id="custom",
+            name="自定义转场",
+            category="special",
+            description="炫酷特效",
+            tags=["炫酷", "特效"],
+            transition="custom",
+            default_duration=1.0,
+            min_duration=0.5,
+            max_duration=5.0,
+            has_custom_params=True,
+        )
+        assert preset.description == "炫酷特效"
+        assert preset.tags == ["炫酷", "特效"]
+        assert preset.default_duration == 1.0
+        assert preset.min_duration == 0.5
+        assert preset.max_duration == 5.0
+        assert preset.has_custom_params is True
+
+    def test_frozen_immutable(self):
+        """frozen dataclass 不可修改"""
+        preset = TransitionPreset(id="test", name="测试", category="basic")
+        with pytest.raises(Exception):
+            preset.name = "改名"
+
+    def test_tags_default_empty_list(self):
+        preset = TransitionPreset(id="t1", name="t1", category="basic")
+        preset2 = TransitionPreset(id="t2", name="t2", category="basic")
+        assert preset.tags == []
+        assert preset.tags is not preset2.tags
+
+    def test_default_transition_is_fade(self):
+        preset = TransitionPreset(id="test", name="测试", category="basic")
+        assert preset.transition == "fade"
+
+
+class TestTransitionPresetLibrary:
+    """TRANSITION_PRESET_LIBRARY 预设库测试"""
+
+    def test_library_not_empty(self):
+        assert len(TRANSITION_PRESET_LIBRARY) > 0
+
+    def test_all_presets_have_unique_ids(self):
+        """所有预设 ID 唯一"""
+        ids = [p.id for p in TRANSITION_PRESET_LIBRARY]
+        assert len(ids) == len(set(ids))
+
+    def test_all_presets_have_required_fields(self):
+        """所有预设都有必填字段"""
+        for preset in TRANSITION_PRESET_LIBRARY:
+            assert preset.id, f"missing id"
+            assert preset.name, f"{preset.id} missing name"
+            assert preset.category, f"{preset.id} missing category"
+            assert preset.transition, f"{preset.id} missing transition"
+
+    def test_transition_none_exists(self):
+        """无转场预设存在"""
+        none_preset = next((p for p in TRANSITION_PRESET_LIBRARY if p.id == "transition_none"), None)
+        assert none_preset is not None
+        assert none_preset.name == "无转场"
+        assert none_preset.transition == "none"
+
+    def test_transition_random_exists(self):
+        """随机转场预设存在"""
+        random_preset = next((p for p in TRANSITION_PRESET_LIBRARY if p.id == "transition_random"), None)
+        assert random_preset is not None
+        assert random_preset.name == "随机"
+
+    def test_fade_category_exists(self):
+        """淡入淡出分类有预设"""
+        fade_presets = [p for p in TRANSITION_PRESET_LIBRARY if p.category == "fade"]
+        assert len(fade_presets) >= 2
+
+    def test_duration_constraints_valid(self):
+        """时长约束：min <= default <= max"""
+        for preset in TRANSITION_PRESET_LIBRARY:
+            assert preset.min_duration <= preset.default_duration, \
+                f"{preset.id}: min > default"
+            assert preset.default_duration <= preset.max_duration, \
+                f"{preset.id}: default > max"
+            assert preset.min_duration >= 0, f"{preset.id}: min < 0"
+
+    def test_known_categories_exist(self):
+        """已知分类都有预设"""
+        categories = {p.category for p in TRANSITION_PRESET_LIBRARY}
+        assert "basic" in categories
+        assert "fade" in categories
+
+
+class TestGetTransitionPreset:
+    """get_transition_preset 函数测试"""
+
+    def test_get_existing_preset(self):
+        preset = get_transition_preset("transition_none")
+        assert preset is not None
+        assert preset.id == "transition_none"
+
+    def test_get_fade_preset(self):
+        preset = get_transition_preset("transition_fade")
+        assert preset is not None
+        assert preset.transition == "fade"
+
+    def test_get_nonexistent_preset(self):
+        assert get_transition_preset("nonexistent_transition") is None
+
+    def test_returns_transitionpreset_type(self):
+        preset = get_transition_preset("transition_fade")
+        assert isinstance(preset, TransitionPreset)
+
+
+class TestListTransitionPresets:
+    """list_transition_presets 函数测试"""
+
+    def test_list_all(self):
+        """不带参数返回所有预设"""
+        all_presets = list_transition_presets()
+        assert len(all_presets) == len(TRANSITION_PRESET_LIBRARY)
+
+    def test_filter_by_category(self):
+        """按分类筛选"""
+        fade_presets = list_transition_presets(category="fade")
+        assert len(fade_presets) > 0
+        assert all(p.category == "fade" for p in fade_presets)
+
+    def test_filter_by_basic_category(self):
+        basic_presets = list_transition_presets(category="basic")
+        assert len(basic_presets) >= 2
+
+    def test_filter_by_nonexistent_category(self):
+        result = list_transition_presets(category="nonexistent")
+        assert result == []
+
+    def test_search_by_name(self):
+        """按名称搜索"""
+        result = list_transition_presets(keyword="淡入")
+        assert len(result) >= 1
+        assert any("淡入" in p.name for p in result)
+
+    def test_search_by_tag(self):
+        """按标签搜索"""
+        tagged = [p for p in TRANSITION_PRESET_LIBRARY if p.tags]
+        if tagged:
+            tag = tagged[0].tags[0]
+            result = list_transition_presets(keyword=tag)
+            assert len(result) >= 1
+
+    def test_search_empty_returns_all(self):
+        result = list_transition_presets(keyword="")
+        assert len(result) == len(TRANSITION_PRESET_LIBRARY)
+
+    def test_combined_category_and_search(self):
+        result = list_transition_presets(category="fade", keyword="淡入")
+        assert all(p.category == "fade" for p in result)
+
+    def test_returns_list_of_transitionpreset(self):
+        result = list_transition_presets()
+        assert all(isinstance(p, TransitionPreset) for p in result)
+
+
+class TestGetDefaultTransition:
+    """get_default_transition 函数测试"""
+
+    def test_returns_preset(self):
+        preset = get_default_transition()
+        assert preset is not None
+        assert isinstance(preset, TransitionPreset)
+
+    def test_default_is_none(self):
+        """默认转场是无转场（硬切）"""
+        preset = get_default_transition()
+        assert preset.id == "transition_none"
+        assert preset.transition == "none"
+
+    def test_default_has_zero_duration(self):
+        """无转场默认时长为 0"""
+        preset = get_default_transition()
+        assert preset.default_duration == 0.0
+        assert preset.min_duration == 0.0
+        assert preset.max_duration == 0.0