refactor: B011 修复 - assert False 替换为 raise AssertionError

- 6 处 assert False, "msg" 改为 raise AssertionError("msg")
- 避免 python -O 模式下断言被移除导致测试逻辑失效
- 符合 ruff B011 规则要求

tests/unit/test_phase8_edit_models.py

@@ -44,7 +44,7 @@ class TestEditTemplate:
     def test_create_empty_name_raises(self):
         try:
             EditTemplate.create("   ")
-            assert False, "应该抛出 ValueError"
+            raise AssertionError("应该抛出 ValueError")
         except ValueError as e:
             assert "模板名称不能为空" in str(e)
 
@@ -74,14 +74,14 @@ class TestEditPlan:
     def test_create_empty_name_raises(self):
         try:
             EditPlan.create("tpl-1", "  ")
-            assert False, "应该抛出 ValueError"
+            raise AssertionError("应该抛出 ValueError")
         except ValueError as e:
             assert "计划名称不能为空" in str(e)
 
     def test_create_empty_template_id_raises(self):
         try:
             EditPlan.create("  ", "test")
-            assert False, "应该抛出 ValueError"
+            raise AssertionError("应该抛出 ValueError")
         except ValueError as e:
             assert "template_id 不能为空" in str(e)
 
@@ -112,7 +112,7 @@ class TestEditPlan:
         p = EditPlan.create("tpl-1", "test")
         try:
             p.start_rendering()  # draft → rendering 不合法
-            assert False, "应该抛出 ValueError"
+            raise AssertionError("应该抛出 ValueError")
         except ValueError as e:
             logger.warning(f"Operation failed in tests/unit/test_phase8_edit_models.py: {e}", exc_info=True)
 
@@ -120,7 +120,7 @@ class TestEditPlan:
         p = EditPlan.create("tpl-1", "test")
         try:
             p.mark_completed()  # draft → completed 不合法
-            assert False, "应该抛出 ValueError"
+            raise AssertionError("应该抛出 ValueError")
         except ValueError as e:
             logger.warning(f"Operation failed in tests/unit/test_phase8_edit_models.py: {e}", exc_info=True)
 
@@ -128,7 +128,7 @@ class TestEditPlan:
         p = EditPlan.create("tpl-1", "test")
         try:
             p.reset_to_draft()  # draft → draft 不合法
-            assert False, "应该抛出 ValueError"
+            raise AssertionError("应该抛出 ValueError")
         except ValueError as e:
             logger.warning(f"Operation failed in tests/unit/test_phase8_edit_models.py: {e}", exc_info=True)