diff --git a/apps/web/src/components/layout/PageHead/PageHead.css b/apps/web/src/components/layout/PageHead/PageHead.css
index dbbc3dbcf..9789a9183 100644
--- a/apps/web/src/components/layout/PageHead/PageHead.css
+++ b/apps/web/src/components/layout/PageHead/PageHead.css
@@ -159,4 +159,3 @@
     flex-wrap: wrap;
   }
 }
-
diff --git a/tests/unit/test_template_clip_config.py b/tests/unit/test_template_clip_config.py
new file mode 100755
index 000000000..d43dd315b
--- /dev/null
+++ b/tests/unit/test_template_clip_config.py
@@ -0,0 +1,275 @@
+"""TemplateClipConfig domain entity unit tests (wave219)."""
+
+from datetime import datetime, timezone
+
+import pytest
+from domain.template_clip_config import (
+    ClipType,
+    TemplateClipConfig,
+    TransitionEffect,
+)
+
+# ---------------------------------------------------------------------------
+# ClipType enum
+# ---------------------------------------------------------------------------
+
+
+class TestClipType:
+    def test_all_members_exist(self):
+        assert ClipType.INTRO.value == "intro"
+        assert ClipType.MAIN.value == "main"
+        assert ClipType.TRANSITION.value == "transition"
+        assert ClipType.OUTRO.value == "outro"
+        assert ClipType.TITLE.value == "title"
+        assert ClipType.SUBTITLE.value == "subtitle"
+
+    def test_is_str_enum(self):
+        # StrEnum members are instances of str
+        assert isinstance(ClipType.INTRO, str)
+        assert ClipType.INTRO == "intro"
+
+    def test_from_string(self):
+        assert ClipType("intro") is ClipType.INTRO
+        assert ClipType("main") is ClipType.MAIN
+
+    def test_invalid_value_raises(self):
+        with pytest.raises(ValueError):
+            ClipType("invalid")
+
+
+# ---------------------------------------------------------------------------
+# TransitionEffect enum
+# ---------------------------------------------------------------------------
+
+
+class TestTransitionEffect:
+    def test_all_members_exist(self):
+        assert TransitionEffect.CUT.value == "cut"
+        assert TransitionEffect.FADE.value == "fade"
+        assert TransitionEffect.SLIDE_LEFT.value == "slide_left"
+        assert TransitionEffect.SLIDE_RIGHT.value == "slide_right"
+        assert TransitionEffect.DISSOLVE.value == "dissolve"
+        assert TransitionEffect.WIPE.value == "wipe"
+
+    def test_is_str_enum(self):
+        assert isinstance(TransitionEffect.CUT, str)
+        assert TransitionEffect.CUT == "cut"
+
+    def test_from_string(self):
+        assert TransitionEffect("cut") is TransitionEffect.CUT
+        assert TransitionEffect("fade") is TransitionEffect.FADE
+
+    def test_invalid_value_raises(self):
+        with pytest.raises(ValueError):
+            TransitionEffect("invalid_effect")
+
+
+# ---------------------------------------------------------------------------
+# TemplateClipConfig.create()
+# ---------------------------------------------------------------------------
+
+
+class TestTemplateClipConfigCreate:
+    def test_create_basic(self):
+        cfg = TemplateClipConfig.create(
+            template_id="tpl_001",
+            clip_type=ClipType.MAIN,
+            order=1,
+        )
+        assert cfg.template_id == "tpl_001"
+        assert cfg.clip_type == ClipType.MAIN
+        assert cfg.order == 1
+        assert cfg.id  # auto-generated uuid hex
+        assert len(cfg.id) == 32  # uuid4 hex length
+
+    def test_create_with_string_clip_type(self):
+        cfg = TemplateClipConfig.create(
+            template_id="tpl_001",
+            clip_type="intro",
+            order=0,
+        )
+        assert cfg.clip_type == ClipType.INTRO
+
+    def test_create_with_string_transition_effect(self):
+        cfg = TemplateClipConfig.create(
+            template_id="tpl_001",
+            clip_type=ClipType.MAIN,
+            order=1,
+            transition_effect="fade",
+        )
+        assert cfg.transition_effect == TransitionEffect.FADE
+
+    def test_create_empty_template_id_raises(self):
+        with pytest.raises(ValueError, match="template_id 不能为空"):
+            TemplateClipConfig.create(
+                template_id="",
+                clip_type=ClipType.MAIN,
+                order=1,
+            )
+
+    def test_create_whitespace_template_id_raises(self):
+        with pytest.raises(ValueError, match="template_id 不能为空"):
+            TemplateClipConfig.create(
+                template_id="   ",
+                clip_type=ClipType.MAIN,
+                order=1,
+            )
+
+    def test_create_template_id_stripped(self):
+        cfg = TemplateClipConfig.create(
+            template_id="  tpl_001  ",
+            clip_type=ClipType.MAIN,
+            order=1,
+        )
+        assert cfg.template_id == "tpl_001"
+
+    def test_create_negative_min_duration_raises(self):
+        with pytest.raises(ValueError, match="min_duration 不能为负数"):
+            TemplateClipConfig.create(
+                template_id="tpl_001",
+                clip_type=ClipType.MAIN,
+                order=1,
+                min_duration=-1.0,
+            )
+
+    def test_create_negative_max_duration_raises(self):
+        with pytest.raises(ValueError, match="max_duration 不能为负数"):
+            TemplateClipConfig.create(
+                template_id="tpl_001",
+                clip_type=ClipType.MAIN,
+                order=1,
+                max_duration=-5.0,
+            )
+
+    def test_create_min_greater_than_max_raises(self):
+        with pytest.raises(ValueError, match="min_duration 不能大于 max_duration"):
+            TemplateClipConfig.create(
+                template_id="tpl_001",
+                clip_type=ClipType.MAIN,
+                order=1,
+                min_duration=10.0,
+                max_duration=5.0,
+            )
+
+    def test_create_min_equals_max_ok(self):
+        cfg = TemplateClipConfig.create(
+            template_id="tpl_001",
+            clip_type=ClipType.MAIN,
+            order=1,
+            min_duration=5.0,
+            max_duration=5.0,
+        )
+        assert cfg.min_duration == 5.0
+        assert cfg.max_duration == 5.0
+
+    def test_create_default_values(self):
+        cfg = TemplateClipConfig.create(
+            template_id="tpl_001",
+            clip_type=ClipType.MAIN,
+            order=1,
+        )
+        assert cfg.min_duration == 0.0
+        assert cfg.max_duration == 0.0
+        assert cfg.text_template == ""
+        assert cfg.material_requirements == {}
+        assert cfg.transition_effect == TransitionEffect.CUT
+        assert cfg.config == {}
+
+    def test_create_material_requirements_none_becomes_empty_dict(self):
+        cfg = TemplateClipConfig.create(
+            template_id="tpl_001",
+            clip_type=ClipType.MAIN,
+            order=1,
+            material_requirements=None,
+        )
+        assert cfg.material_requirements == {}
+        # should be a fresh dict, not shared
+        cfg.material_requirements["key"] = "val"
+        cfg2 = TemplateClipConfig.create(
+            template_id="tpl_002",
+            clip_type=ClipType.MAIN,
+            order=1,
+        )
+        assert cfg2.material_requirements == {}
+
+    def test_create_config_none_becomes_empty_dict(self):
+        cfg = TemplateClipConfig.create(
+            template_id="tpl_001",
+            clip_type=ClipType.MAIN,
+            order=1,
+            config=None,
+        )
+        assert cfg.config == {}
+
+    def test_create_text_template_stripped(self):
+        cfg = TemplateClipConfig.create(
+            template_id="tpl_001",
+            clip_type=ClipType.MAIN,
+            order=1,
+            text_template="  hello {{name}}  ",
+        )
+        assert cfg.text_template == "hello {{name}}"
+
+    def test_create_generates_unique_ids(self):
+        cfg1 = TemplateClipConfig.create("tpl", ClipType.MAIN, 1)
+        cfg2 = TemplateClipConfig.create("tpl", ClipType.MAIN, 2)
+        assert cfg1.id != cfg2.id
+
+    def test_create_timestamps_are_utc(self):
+        before = datetime.now(timezone.utc)
+        cfg = TemplateClipConfig.create("tpl", ClipType.MAIN, 1)
+        after = datetime.now(timezone.utc)
+        assert before <= cfg.created_at <= after
+        assert before <= cfg.updated_at <= after
+        assert cfg.created_at.tzinfo is timezone.utc
+        assert cfg.updated_at.tzinfo is timezone.utc
+
+
+# ---------------------------------------------------------------------------
+# has_duration_range property
+# ---------------------------------------------------------------------------
+
+
+class TestHasDurationRange:
+    def test_both_zero(self):
+        cfg = TemplateClipConfig.create("tpl", ClipType.MAIN, 1)
+        assert cfg.has_duration_range is False
+
+    def test_only_min_positive(self):
+        cfg = TemplateClipConfig.create("tpl", ClipType.MAIN, 1, min_duration=2.0)
+        assert cfg.has_duration_range is True
+
+    def test_only_max_positive(self):
+        cfg = TemplateClipConfig.create("tpl", ClipType.MAIN, 1, max_duration=5.0)
+        assert cfg.has_duration_range is True
+
+    def test_both_positive(self):
+        cfg = TemplateClipConfig.create("tpl", ClipType.MAIN, 1, min_duration=2.0, max_duration=5.0)
+        assert cfg.has_duration_range is True
+
+
+# ---------------------------------------------------------------------------
+# default_duration property
+# ---------------------------------------------------------------------------
+
+
+class TestDefaultDuration:
+    def test_both_zero_returns_zero(self):
+        cfg = TemplateClipConfig.create("tpl", ClipType.MAIN, 1)
+        assert cfg.default_duration == 0.0
+
+    def test_only_min_returns_min(self):
+        cfg = TemplateClipConfig.create("tpl", ClipType.MAIN, 1, min_duration=3.0)
+        assert cfg.default_duration == 3.0
+
+    def test_only_max_returns_max(self):
+        cfg = TemplateClipConfig.create("tpl", ClipType.MAIN, 1, max_duration=5.0)
+        assert cfg.default_duration == 5.0
+
+    def test_both_set_returns_midpoint(self):
+        cfg = TemplateClipConfig.create("tpl", ClipType.MAIN, 1, min_duration=2.0, max_duration=6.0)
+        assert cfg.default_duration == 4.0
+
+    def test_min_equals_max_returns_same(self):
+        cfg = TemplateClipConfig.create("tpl", ClipType.MAIN, 1, min_duration=3.0, max_duration=3.0)
+        assert cfg.default_duration == 3.0