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/e2e/test_check_cmd.py

@@ -15,13 +15,10 @@ class TestCheckCmd:
 
     def run_check(self, *args):
         """辅助函数：运行 check 命令"""
-        cmd = [sys.executable, "-m", "uv", "run", "python", "yaml2pptx.py", "check"]
+        cmd = ["uv", "run", "python", "yaml2pptx.py", "check"]
         cmd.extend(args)
         result = subprocess.run(
-            cmd,
-            capture_output=True,
-            text=True,
-            cwd=Path(__file__).parent.parent.parent
+            cmd, capture_output=True, text=True, cwd=Path(__file__).parent.parent.parent
         )
         return result
 

tests/e2e/test_convert_cmd.py

@@ -16,13 +16,10 @@ class TestConvertCmd:
 
     def run_convert(self, *args):
         """辅助函数：运行 convert 命令"""
-        cmd = [sys.executable, "-m", "uv", "run", "python", "yaml2pptx.py", "convert"]
+        cmd = ["uv", "run", "python", "yaml2pptx.py", "convert"]
         cmd.extend(args)
         result = subprocess.run(
-            cmd,
-            capture_output=True,
-            text=True,
-            cwd=Path(__file__).parent.parent.parent
+            cmd, capture_output=True, text=True, cwd=Path(__file__).parent.parent.parent
         )
         return result
 
@@ -37,19 +34,29 @@ class TestConvertCmd:
 
     def test_auto_output_filename(self, sample_yaml, temp_dir):
         """测试自动生成输出文件名"""
-        # 在 temp_dir 中运行
+        # sample_yaml 位于 temp_dir 中，转换时输出也会在 temp_dir
+        # 但因为 cwd 是项目根目录，所以输出文件的路径需要计算
+        # 实际上，由于 sample_yaml 使用 tempfile，输出会在 temp_dir 中
         result = subprocess.run(
-            [sys.executable, "-m", "uv", "run", "python",
-             "yaml2pptx.py", "convert", str(sample_yaml)],
+            [
+                "uv",
+                "run",
+                "python",
+                "yaml2pptx.py",
+                "convert",
+                str(sample_yaml),
+            ],
             capture_output=True,
             text=True,
-            cwd=temp_dir
+            cwd=Path(__file__).parent.parent.parent,
         )
 
-        assert result.returncode == 0
-        # 应该生成与输入同名的 .pptx 文件
+        assert result.returncode == 0, f"Command failed: {result.stderr}"
+        # 应该生成与输入同名的 .pptx 文件（在 temp_dir 中）
         expected_output = temp_dir / "test.pptx"
-        assert expected_output.exists()
+        assert expected_output.exists(), (
+            f"Expected {expected_output} to exist, but didn't"
+        )
 
     def test_conversion_with_template(self, temp_dir, sample_template):
         """测试使用模板转换"""
@@ -67,9 +74,7 @@ slides:
 
         output = temp_dir / "output.pptx"
         result = self.run_convert(
-            str(yaml_path),
-            str(output),
-            "--template-dir", str(sample_template)
+            str(yaml_path), str(output), "--template-dir", str(sample_template)
         )
 
         assert result.returncode == 0
@@ -78,11 +83,7 @@ slides:
     def test_skip_validation(self, sample_yaml, temp_dir):
         """测试跳过验证"""
         output = temp_dir / "output.pptx"
-        result = self.run_convert(
-            str(sample_yaml),
-            str(output),
-            "--skip-validation"
-        )
+        result = self.run_convert(str(sample_yaml), str(output), "--skip-validation")
 
         assert result.returncode == 0
         assert output.exists()
@@ -95,11 +96,7 @@ slides:
         output.write_text("existing")
 
         # 使用 --force 应该覆盖
-        result = self.run_convert(
-            str(sample_yaml),
-            str(output),
-            "--force"
-        )
+        result = self.run_convert(str(sample_yaml), str(output), "--force")
 
         assert result.returncode == 0
         # 文件应该是有效的 PPTX，不是原来的文本
@@ -129,7 +126,12 @@ slides:
 
     def test_conversion_with_all_element_types(self, temp_dir, sample_image):
         """测试转换包含所有元素类型的 YAML"""
-        fixtures_yaml = Path(__file__).parent.parent / "fixtures" / "yaml_samples" / "full_features.yaml"
+        fixtures_yaml = (
+            Path(__file__).parent.parent
+            / "fixtures"
+            / "yaml_samples"
+            / "full_features.yaml"
+        )
         if not fixtures_yaml.exists():
             pytest.skip("full_features.yaml not found")
 
@@ -158,7 +160,7 @@ slides:
           size: 24
 """
         yaml_path = temp_dir / "test.yaml"
-        yaml_path.write_text(yaml_content, encoding='utf-8')
+        yaml_path.write_text(yaml_content, encoding="utf-8")
 
         output = temp_dir / "output.pptx"
         result = self.run_convert(str(yaml_path), str(output))
@@ -174,9 +176,9 @@ slides:
     def test_different_slide_sizes(self, temp_dir):
         """测试不同的幻灯片尺寸"""
         for size in ["16:9", "4:3"]:
-            yaml_content = f"""
+            yaml_content = f'''
 metadata:
-  size: {size}
+  size: "{size}"
 
 slides:
   - elements:
@@ -185,7 +187,7 @@ slides:
         content: "Size {size}"
         font:
           size: 24
-"""
+'''
             yaml_path = temp_dir / f"test_{size.replace(':', '')}.yaml"
             yaml_path.write_text(yaml_content)