fix: 修复测试问题，提升测试通过率

修复内容:
- E2E测试命令执行方式：将 python -m uv run 改为 uv run
- HTML渲染器：添加 & 字符的HTML转义
- Presentation尺寸验证：添加尺寸值类型验证
- PPTX验证器：修复文本框检测兼容性
- 验证结果格式化：修复提示信息显示
- Mock配置：修复表格渲染等测试的Mock配置

测试结果:
- 修复前: 264 通过, 42 失败, 1 错误
- 修复后: 297 通过, 9 失败, 1 错误

剩余9个失败为待实现的功能增强(验证器模板变量验证)

tests/unit/test_template.py

@@ -12,6 +12,7 @@ from core.template import Template
 
 # ============= 模板初始化测试 =============
 
+
 class TestTemplateInit:
     """Template 初始化测试类"""
 
@@ -40,6 +41,7 @@ class TestTemplateInit:
 
 # ============= 变量解析测试 =============
 
+
 class TestResolveValue:
     """resolve_value 方法测试类"""
 
@@ -52,10 +54,9 @@ class TestResolveValue:
     def test_resolve_value_multiple_variables(self, sample_template):
         """测试解析多个变量"""
         template = Template("title-slide", templates_dir=sample_template)
-        result = template.resolve_value("{title} - {subtitle}", {
-            "title": "Main",
-            "subtitle": "Sub"
-        })
+        result = template.resolve_value(
+            "{title} - {subtitle}", {"title": "Main", "subtitle": "Sub"}
+        )
         assert result == "Main - Sub"
 
     def test_resolve_value_undefined_variable_raises_error(self, sample_template):
@@ -64,7 +65,7 @@ class TestResolveValue:
         with pytest.raises(YAMLError, match="未定义的变量"):
             template.resolve_value("{undefined}", {"title": "Test"})
 
-    def test_resolve_value_preserves_non_string(self):
+    def test_resolve_value_preserves_non_string(self, sample_template):
         """测试非字符串值保持原样"""
         template = Template("title-slide", templates_dir=sample_template)
         assert template.resolve_value(123, {}) == 123
@@ -88,6 +89,7 @@ class TestResolveValue:
 
 # ============= resolve_element 测试 =============
 
+
 class TestResolveElement:
     """resolve_element 方法测试类"""
 
@@ -109,12 +111,7 @@ class TestResolveElement:
     def test_resolve_element_nested_structure(self, sample_template):
         """测试解析嵌套结构"""
         template = Template("title-slide", templates_dir=sample_template)
-        elem = {
-            "font": {
-                "size": "{size}",
-                "color": "#000000"
-            }
-        }
+        elem = {"font": {"size": "{size}", "color": "#000000"}}
         result = template.resolve_element(elem, {"size": "24"})
         assert result["font"]["size"] == 24
         assert result["font"]["color"] == "#000000"
@@ -129,23 +126,22 @@ class TestResolveElement:
 
 # ============= 条件渲染测试 =============
 
+
 class TestEvaluateCondition:
     """evaluate_condition 方法测试类"""
 
     def test_evaluate_condition_with_non_empty_variable(self, sample_template):
         """测试非空变量条件为真"""
         template = Template("title-slide", templates_dir=sample_template)
-        result = template.evaluate_condition("{subtitle != ''}", {
-            "subtitle": "Test Subtitle"
-        })
+        result = template.evaluate_condition(
+            "{subtitle != ''}", {"subtitle": "Test Subtitle"}
+        )
         assert result is True
 
     def test_evaluate_condition_with_empty_variable(self, sample_template):
         """测试空变量条件为假"""
         template = Template("title-slide", templates_dir=sample_template)
-        result = template.evaluate_condition("{subtitle != ''}", {
-            "subtitle": ""
-        })
+        result = template.evaluate_condition("{subtitle != ''}", {"subtitle": ""})
         assert result is False
 
     def test_evaluate_condition_with_missing_variable(self, sample_template):
@@ -163,6 +159,7 @@ class TestEvaluateCondition:
 
 # ============= 模板渲染测试 =============
 
+
 class TestRender:
     """render 方法测试类"""
 
@@ -170,7 +167,8 @@ class TestRender:
         """测试渲染包含必需变量的模板"""
         template = Template("title-slide", templates_dir=sample_template)
         result = template.render({"title": "My Presentation"})
-        assert len(result) == 2  # 两个元素
+        # 由于条件渲染，subtitle元素被跳过，只返回1个元素
+        assert len(result) == 1
         assert result[0]["content"] == "My Presentation"
 
     def test_render_with_optional_variable(self, sample_template):
@@ -232,6 +230,7 @@ elements:
 
 # ============= 边界情况补充测试 =============
 
+
 class TestTemplateBoundaryCases:
     """模板系统边界情况测试"""
 
@@ -283,11 +282,11 @@ elements:
         special_values = [
             "Test & Data",
             "Test <Script>",
-            "Test \"Quotes\"",
+            'Test "Quotes"',
             "Test 'Apostrophe'",
             "测试中文",
             "Test: colon",
-            "Test; semi"
+            "Test; semi",
         ]
         for value in special_values:
             result = template.render({"title": value})
@@ -378,11 +377,9 @@ elements:
         assert len(result1) == 1
 
         # 有 subtitle 和 footer
-        result2 = template.render({
-            "title": "Test",
-            "subtitle": "Sub",
-            "footer": "Foot"
-        })
+        result2 = template.render(
+            {"title": "Test", "subtitle": "Sub", "footer": "Foot"}
+        )
         assert len(result2) == 3
 
     def test_variable_in_position(self, temp_dir):
@@ -438,8 +435,8 @@ elements:
     content: "Styled Text"
     box: [0, 0, 1, 1]
     font:
-      size: {font_size}
-      color: {text_color}
+      size: "{font_size}"
+      color: "{text_color}"
       bold: true
 """
         template_file = temp_dir / "templates" / "font-vars.yaml"
@@ -447,10 +444,8 @@ elements:
         template_file.write_text(template_content)
 
         template = Template("font-vars", templates_dir=temp_dir / "templates")
-        result = template.render({
-            "font_size": "24",
-            "text_color": "#ff0000"
-        })
+        result = template.render({"font_size": "24", "text_color": "#ff0000"})
 
         assert result[0]["font"]["size"] == 24
         assert result[0]["font"]["color"] == "#ff0000"
+        assert result[0]["font"]["color"] == "#ff0000"