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debug_vector_export.html +319 -0
test_vector_export.js +189 -0
vector_export_fix.md +244 -0

debug_vector_export.html ADDED Viewed

	@@ -0,0 +1,319 @@

+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>矢量元素导出调试</title>
+    <style>
+        body {
+            font-family: Arial, sans-serif;
+            margin: 20px;
+            background-color: #f5f5f5;
+        }
+        .container {
+            max-width: 1200px;
+            margin: 0 auto;
+            background: white;
+            padding: 20px;
+            border-radius: 8px;
+            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
+        }
+        .test-section {
+            margin-bottom: 30px;
+            padding: 20px;
+            border: 1px solid #ddd;
+            border-radius: 5px;
+        }
+        .test-title {
+            font-size: 18px;
+            font-weight: bold;
+            margin-bottom: 15px;
+            color: #333;
+        }
+        .svg-container {
+            display: inline-block;
+            margin: 10px;
+            border: 1px solid #ccc;
+            padding: 10px;
+            background: white;
+        }
+        .debug-info {
+            background: #f8f9fa;
+            padding: 10px;
+            margin-top: 10px;
+            border-radius: 4px;
+            font-family: monospace;
+            font-size: 12px;
+        }
+        button {
+            background: #007bff;
+            color: white;
+            border: none;
+            padding: 8px 16px;
+            border-radius: 4px;
+            cursor: pointer;
+            margin: 5px;
+        }
+        button:hover {
+            background: #0056b3;
+        }
+        .error {
+            color: #dc3545;
+            background: #f8d7da;
+            padding: 10px;
+            border-radius: 4px;
+            margin: 10px 0;
+        }
+        .success {
+            color: #155724;
+            background: #d4edda;
+            padding: 10px;
+            border-radius: 4px;
+            margin: 10px 0;
+        }
+    </style>
+</head>
+<body>
+    <div class="container">
+        <h1>PPT矢量元素导出问题诊断</h1>
+        <div class="test-section">
+            <div class="test-title">1. 基础形状元素测试</div>
+            <div class="svg-container">
+                <svg width="100" height="100" id="basic-shape">
+                    <path d="M10,10 L90,10 L90,90 L10,90 Z"
+                          fill="#ff6b6b"
+                          stroke="#333"
+                          stroke-width="2"
+                          vector-effect="non-scaling-stroke"/>
+                </svg>
+                <div class="debug-info">基础矩形 - 100x100px</div>
+            </div>
+            <div class="svg-container">
+                <svg width="100" height="100" id="circle-shape">
+                    <circle cx="50" cy="50" r="40"
+                            fill="#4ecdc4"
+                            stroke="#333"
+                            stroke-width="2"
+                            vector-effect="non-scaling-stroke"/>
+                </svg>
+                <div class="debug-info">圆形 - 半径40px</div>
+            </div>
+        </div>
+        <div class="test-section">
+            <div class="test-title">2. 复杂路径元素测试</div>
+            <div class="svg-container">
+                <svg width="120" height="100" id="complex-path">
+                    <path d="M20,80 C20,80 20,20 50,20 S80,20 80,50 S80,80 50,80 S20,80 20,80"
+                          fill="#45b7d1"
+                          stroke="#333"
+                          stroke-width="2"
+                          vector-effect="non-scaling-stroke"/>
+                </svg>
+                <div class="debug-info">复杂曲线路径</div>
+            </div>
+            <div class="svg-container">
+                <svg width="100" height="100" id="star-shape">
+                    <path d="M50,5 L61,35 L95,35 L68,57 L79,91 L50,70 L21,91 L32,57 L5,35 L39,35 Z"
+                          fill="#f7b731"
+                          stroke="#333"
+                          stroke-width="2"
+                          vector-effect="non-scaling-stroke"/>
+                </svg>
+                <div class="debug-info">星形路径</div>
+            </div>
+        </div>
+        <div class="test-section">
+            <div class="test-title">3. 线条元素测试</div>
+            <div class="svg-container">
+                <svg width="120" height="80" id="line-element">
+                    <path d="M10,40 L110,40"
+                          stroke="#e74c3c"
+                          stroke-width="3"
+                          vector-effect="non-scaling-stroke"
+                          marker-end="url(#arrowhead)"/>
+                    <defs>
+                        <marker id="arrowhead" markerWidth="10" markerHeight="7"
+                                refX="9" refY="3.5" orient="auto">
+                            <polygon points="0 0, 10 3.5, 0 7" fill="#e74c3c"/>
+                        </marker>
+                    </defs>
+                </svg>
+                <div class="debug-info">带箭头的直线</div>
+            </div>
+            <div class="svg-container">
+                <svg width="120" height="80" id="curved-line">
+                    <path d="M10,60 Q60,10 110,60"
+                          stroke="#9b59b6"
+                          stroke-width="3"
+                          fill="none"
+                          vector-effect="non-scaling-stroke"/>
+                </svg>
+                <div class="debug-info">二次贝塞尔曲线</div>
+            </div>
+        </div>
+        <div class="test-section">
+            <div class="test-title">4. 导出测试功能</div>
+            <button onclick="testSVGSerialization()">测试SVG序列化</button>
+            <button onclick="testBase64Conversion()">测试Base64转换</button>
+            <button onclick="testElementDimensions()">测试元素尺寸</button>
+            <button onclick="runAllTests()">运行所有测试</button>
+            <div id="test-results"></div>
+        </div>
+        <div class="test-section">
+            <div class="test-title">5. 问题诊断结果</div>
+            <div id="diagnosis-results">
+                <p>点击上方按钮开始诊断...</p>
+            </div>
+        </div>
+    </div>
+    <script>
+        // SVG序列化测试
+        function testSVGSerialization() {
+            const results = document.getElementById('test-results');
+            results.innerHTML = '<h4>SVG序列化测试结果:</h4>';
+            const svgElements = ['basic-shape', 'circle-shape', 'complex-path', 'star-shape', 'line-element', 'curved-line'];
+            svgElements.forEach(id => {
+                const svg = document.getElementById(id);
+                if (svg) {
+                    try {
+                        const serializer = new XMLSerializer();
+                        const svgString = serializer.serializeToString(svg);
+                        const isValid = svgString.length > 0 && svgString.includes('<svg');
+                        results.innerHTML += `
+                            <div class="${isValid ? 'success' : 'error'}">
+                                <strong>${id}:</strong> ${isValid ? '✓ 序列化成功' : '✗ 序列化失败'}<br>
+                                <small>长度: ${svgString.length} 字符</small>
+                            </div>
+                        `;
+                    } catch (error) {
+                        results.innerHTML += `
+                            <div class="error">
+                                <strong>${id}:</strong> ✗ 序列化异常: ${error.message}
+                            </div>
+                        `;
+                    }
+                }
+            });
+        }
+        // Base64转换测试
+        function testBase64Conversion() {
+            const results = document.getElementById('test-results');
+            results.innerHTML = '<h4>Base64转换测试结果:</h4>';
+            const svg = document.getElementById('basic-shape');
+            if (svg) {
+                try {
+                    const serializer = new XMLSerializer();
+                    const svgString = serializer.serializeToString(svg);
+                    const base64 = btoa(unescape(encodeURIComponent(svgString)));
+                    const dataUrl = `data:image/svg+xml;base64,${base64}`;
+                    results.innerHTML += `
+                        <div class="success">
+                            <strong>Base64转换:</strong> ✓ 成功<br>
+                            <small>Data URL长度: ${dataUrl.length} 字符</small><br>
+                            <img src="${dataUrl}" style="max-width: 100px; border: 1px solid #ccc; margin-top: 5px;">
+                        </div>
+                    `;
+                } catch (error) {
+                    results.innerHTML += `
+                        <div class="error">
+                            <strong>Base64转换:</strong> ✗ 失败: ${error.message}
+                        </div>
+                    `;
+                }
+            }
+        }
+        // 元素尺寸测试
+        function testElementDimensions() {
+            const results = document.getElementById('test-results');
+            results.innerHTML = '<h4>元素尺寸测试结果:</h4>';
+            const svgElements = ['basic-shape', 'circle-shape', 'complex-path'];
+            svgElements.forEach(id => {
+                const svg = document.getElementById(id);
+                if (svg) {
+                    const clientWidth = svg.clientWidth;
+                    const clientHeight = svg.clientHeight;
+                    const boundingRect = svg.getBoundingClientRect();
+                    const isValidSize = clientWidth > 0 && clientHeight > 0;
+                    results.innerHTML += `
+                        <div class="${isValidSize ? 'success' : 'error'}">
+                            <strong>${id}:</strong><br>
+                            clientWidth: ${clientWidth}px<br>
+                            clientHeight: ${clientHeight}px<br>
+                            boundingRect: ${boundingRect.width}x${boundingRect.height}px<br>
+                            ${isValidSize ? '✓ 尺寸正常' : '✗ 尺寸异常 (可能导致导出失败)'}
+                        </div>
+                    `;
+                }
+            });
+        }
+        // 运行所有测试
+        function runAllTests() {
+            testSVGSerialization();
+            setTimeout(() => {
+                testBase64Conversion();
+                setTimeout(() => {
+                    testElementDimensions();
+                    setTimeout(generateDiagnosis, 500);
+                }, 500);
+            }, 500);
+        }
+        // 生成诊断报告
+        function generateDiagnosis() {
+            const diagnosisDiv = document.getElementById('diagnosis-results');
+            diagnosisDiv.innerHTML = `
+                <h4>诊断报告:</h4>
+                <div class="debug-info">
+                    <strong>可能的问题原因:</strong><br>
+                    1. SVG元素尺寸为0或负数 (clientWidth < 1 || clientHeight < 1)<br>
+                    2. SVG序列化失败或返回空字符串<br>
+                    3. Base64编码过程中出现错误<br>
+                    4. 特殊形状元素(special=true)的DOM查询失败<br>
+                    5. vector-effect="non-scaling-stroke"属性导致的兼容性问题<br><br>
+                    <strong>建议的解决方案:</strong><br>
+                    1. 在导出前检查SVG元素的实际渲染尺寸<br>
+                    2. 添加SVG序列化的错误处理和重试机制<br>
+                    3. 确保DOM元素在导出时已完全渲染<br>
+                    4. 考虑使用setTimeout延迟导出以确保渲染完成<br>
+                    5. 添加更详细的错误日志记录<br>
+                </div>
+            `;
+        }
+        // 页面加载完成后自动运行基础检查
+        window.addEventListener('load', () => {
+            console.log('矢量元素导出调试页面已加载');
+            console.log('可用的测试函数:', {
+                testSVGSerialization,
+                testBase64Conversion,
+                testElementDimensions,
+                runAllTests
+            });
+        });
+    </script>
+</body>
+</html>

test_vector_export.js ADDED Viewed

	@@ -0,0 +1,189 @@

+// 矢量元素导出测试脚本
+// 在浏览器控制台中运行此脚本来测试修复效果
+(function() {
+    console.log('=== PPT矢量元素导出测试开始 ===');
+    // 测试SVG元素检测
+    function testSVGElementDetection() {
+        console.log('\n1. 测试SVG元素检测...');
+        const svgElements = document.querySelectorAll('svg');
+        console.log(`找到 ${svgElements.length} 个SVG元素`);
+        svgElements.forEach((svg, index) => {
+            const clientWidth = svg.clientWidth;
+            const clientHeight = svg.clientHeight;
+            const boundingRect = svg.getBoundingClientRect();
+            const computedStyle = window.getComputedStyle(svg);
+            const hasValidSize = (
+                (clientWidth > 0 && clientHeight > 0) ||
+                (boundingRect.width > 0 && boundingRect.height > 0) ||
+                (parseFloat(computedStyle.width) > 0 && parseFloat(computedStyle.height) > 0)
+            );
+            console.log(`SVG ${index + 1}:`, {
+                element: svg,
+                clientSize: `${clientWidth}x${clientHeight}`,
+                boundingRect: `${boundingRect.width}x${boundingRect.height}`,
+                computedSize: `${computedStyle.width}x${computedStyle.height}`,
+                hasValidSize,
+                classes: svg.className.baseVal || svg.className
+            });
+        });
+    }
+    // 测试SVG序列化
+    function testSVGSerialization() {
+        console.log('\n2. 测试SVG序列化...');
+        const svgElements = document.querySelectorAll('svg');
+        let successCount = 0;
+        let failCount = 0;
+        svgElements.forEach((svg, index) => {
+            try {
+                const serializer = new XMLSerializer();
+                const svgString = serializer.serializeToString(svg);
+                if (svgString && svgString.length > 0) {
+                    successCount++;
+                    console.log(`✓ SVG ${index + 1} 序列化成功 (${svgString.length} 字符)`);
+                } else {
+                    failCount++;
+                    console.log(`✗ SVG ${index + 1} 序列化返回空字符串`);
+                }
+            } catch (error) {
+                failCount++;
+                console.log(`✗ SVG ${index + 1} 序列化失败:`, error.message);
+            }
+        });
+        console.log(`序列化结果: ${successCount} 成功, ${failCount} 失败`);
+    }
+    // 测试Base64转换
+    function testBase64Conversion() {
+        console.log('\n3. 测试Base64转换...');
+        const svgElements = document.querySelectorAll('svg');
+        let successCount = 0;
+        let failCount = 0;
+        svgElements.forEach((svg, index) => {
+            try {
+                // 模拟改进后的svg2Base64函数
+                const clonedElement = svg.cloneNode(true);
+                if (clonedElement.tagName.toLowerCase() === 'svg') {
+                    clonedElement.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
+                    clonedElement.setAttribute('xmlns:xlink', 'http://www.w3.org/1999/xlink');
+                }
+                const serializer = new XMLSerializer();
+                const svgString = serializer.serializeToString(clonedElement);
+                if (!svgString || svgString.length === 0) {
+                    throw new Error('SVG序列化返回空字符串');
+                }
+                const base64 = btoa(unescape(encodeURIComponent(svgString)));
+                const dataUrl = `data:image/svg+xml;base64,${base64}`;
+                if (base64 && base64.length > 0) {
+                    successCount++;
+                    console.log(`✓ SVG ${index + 1} Base64转换成功 (${dataUrl.length} 字符)`);
+                } else {
+                    failCount++;
+                    console.log(`✗ SVG ${index + 1} Base64转换返回空字符串`);
+                }
+            } catch (error) {
+                failCount++;
+                console.log(`✗ SVG ${index + 1} Base64转换失败:`, error.message);
+            }
+        });
+        console.log(`Base64转换结果: ${successCount} 成功, ${failCount} 失败`);
+    }
+    // 测试形状元素检测
+    function testShapeElementDetection() {
+        console.log('\n4. 测试形状元素检测...');
+        // 查找可能的形状元素
+        const shapeElements = document.querySelectorAll('[class*="base-element-"]');
+        console.log(`找到 ${shapeElements.length} 个可能的形状元素`);
+        shapeElements.forEach((element, index) => {
+            const svg = element.querySelector('svg');
+            if (svg) {
+                const elementId = element.className.match(/base-element-([^\s]+)/);
+                console.log(`形状元素 ${index + 1}:`, {
+                    elementId: elementId ? elementId[1] : 'unknown',
+                    element: element,
+                    svg: svg,
+                    svgSize: `${svg.clientWidth}x${svg.clientHeight}`,
+                    hasValidSize: svg.clientWidth > 0 && svg.clientHeight > 0
+                });
+            }
+        });
+    }
+    // 测试渲染等待机制
+    function testRenderWait() {
+        console.log('\n5. 测试渲染等待机制...');
+        return new Promise((resolve) => {
+            const startTime = performance.now();
+            // 强制重绘
+            document.body.offsetHeight;
+            // 等待下一个动画帧
+            requestAnimationFrame(() => {
+                requestAnimationFrame(() => {
+                    const endTime = performance.now();
+                    console.log(`✓ 渲染等待完成，耗时: ${(endTime - startTime).toFixed(2)}ms`);
+                    resolve();
+                });
+            });
+        });
+    }
+    // 运行所有测试
+    async function runAllTests() {
+        try {
+            testSVGElementDetection();
+            testSVGSerialization();
+            testBase64Conversion();
+            testShapeElementDetection();
+            await testRenderWait();
+            console.log('\n=== 测试完成 ===');
+            console.log('如果发现问题，请检查:');
+            console.log('1. SVG元素是否正确渲染');
+            console.log('2. 元素尺寸是否有效');
+            console.log('3. SVG序列化是否成功');
+            console.log('4. Base64转换是否正常');
+        } catch (error) {
+            console.error('测试过程中发生错误:', error);
+        }
+    }
+    // 导出测试函数到全局作用域
+    window.vectorExportTest = {
+        runAllTests,
+        testSVGElementDetection,
+        testSVGSerialization,
+        testBase64Conversion,
+        testShapeElementDetection,
+        testRenderWait
+    };
+    console.log('测试函数已加载，使用 vectorExportTest.runAllTests() 运行所有测试');
+    // 自动运行测试
+    runAllTests();
+})();

vector_export_fix.md ADDED Viewed

	@@ -0,0 +1,244 @@

+# PPT矢量元素导出问题修复方案
+## 问题分析
+通过代码分析，发现PPT内置矢量元素无法正常导出的主要原因：
+### 1. 核心问题
+在 `useExport.ts` 第977行存在一个临时处理逻辑：
+```typescript
+if (svgRef.clientWidth < 1 || svgRef.clientHeight < 1) continue // 临时处理（导入PPTX文件带来的异常数据）
+```
+这个检查会跳过所有尺寸小于1像素的SVG元素，但某些矢量元素在特定情况下可能确实会出现这种情况。
+### 2. 相关问题
+- SVG元素在DOM中可能未完全渲染
+- `vector-effect="non-scaling-stroke"` 属性可能影响尺寸计算
+- 特殊形状元素(special=true)的DOM查询可能失败
+- SVG序列化过程缺乏错误处理
+## 修复方案
+### 方案1: 改进尺寸检查逻辑
+```typescript
+// 替换原有的简单尺寸检查
+if (el.special) {
+  const svgRef = document.querySelector(`.thumbnail-list .base-element-${el.id} svg`) as HTMLElement
+  // 改进的尺寸检查
+  if (!svgRef) {
+    console.warn(`SVG element not found for shape ${el.id}`);
+    continue;
+  }
+  // 获取多种尺寸信息进行判断
+  const clientWidth = svgRef.clientWidth;
+  const clientHeight = svgRef.clientHeight;
+  const boundingRect = svgRef.getBoundingClientRect();
+  const computedStyle = window.getComputedStyle(svgRef);
+  // 更智能的尺寸判断
+  const hasValidSize = (
+    (clientWidth > 0 && clientHeight > 0) ||
+    (boundingRect.width > 0 && boundingRect.height > 0) ||
+    (parseFloat(computedStyle.width) > 0 && parseFloat(computedStyle.height) > 0)
+  );
+  if (!hasValidSize) {
+    console.warn(`Invalid SVG dimensions for shape ${el.id}:`, {
+      clientWidth,
+      clientHeight,
+      boundingRect: { width: boundingRect.width, height: boundingRect.height },
+      computedStyle: { width: computedStyle.width, height: computedStyle.height }
+    });
+    continue;
+  }
+  // SVG序列化with错误处理
+  let base64SVG;
+  try {
+    base64SVG = svg2Base64(svgRef);
+    if (!base64SVG || base64SVG === 'data:image/svg+xml;base64,') {
+      throw new Error('SVG serialization returned empty result');
+    }
+  } catch (error) {
+    console.error(`SVG serialization failed for shape ${el.id}:`, error);
+    continue;
+  }
+  // 其余导出逻辑...
+}
+```
+### 方案2: 添加渲染等待机制
+```typescript
+// 在导出开始前添加渲染等待
+const ensureElementsRendered = async () => {
+  return new Promise<void>((resolve) => {
+    // 强制重绘
+    document.body.offsetHeight;
+    // 等待下一个动画帧
+    requestAnimationFrame(() => {
+      requestAnimationFrame(() => {
+        resolve();
+      });
+    });
+  });
+};
+// 在exportPPTX函数开始处调用
+export const exportPPTX = async (slides: Slide[], title: string, ignoreMedia = false) => {
+  exporting.value = true;
+  // 确保所有元素已渲染
+  await ensureElementsRendered();
+  // 其余导出逻辑...
+}
+```
+### 方案3: 改进SVG处理逻辑
+```typescript
+// 改进svg2Base64函数
+export const svg2Base64 = (element: Element) => {
+  try {
+    // 克隆元素以避免修改原始DOM
+    const clonedElement = element.cloneNode(true) as Element;
+    // 确保SVG有正确的命名空间
+    if (clonedElement.tagName.toLowerCase() === 'svg') {
+      clonedElement.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
+      clonedElement.setAttribute('xmlns:xlink', 'http://www.w3.org/1999/xlink');
+    }
+    const XMLS = new XMLSerializer();
+    const svg = XMLS.serializeToString(clonedElement);
+    if (!svg || svg.length === 0) {
+      throw new Error('SVG serialization returned empty string');
+    }
+    const encoded = encode(svg);
+    if (!encoded) {
+      throw new Error('Base64 encoding failed');
+    }
+    return PREFIX + encoded;
+  } catch (error) {
+    console.error('svg2Base64 failed:', error);
+    throw error;
+  }
+};
+```
+### 方案4: 添加降级处理
+```typescript
+// 为特殊形状添加降级处理
+else if (el.type === 'shape') {
+  if (el.special) {
+    let base64SVG;
+    try {
+      // 尝试从DOM获取SVG
+      const svgRef = document.querySelector(`.thumbnail-list .base-element-${el.id} svg`) as HTMLElement;
+      if (svgRef && svgRef.clientWidth > 0 && svgRef.clientHeight > 0) {
+        base64SVG = svg2Base64(svgRef);
+      } else {
+        throw new Error('SVG element not found or has invalid dimensions');
+      }
+    } catch (error) {
+      console.warn(`Failed to export special shape ${el.id} as SVG, falling back to path-based export:`, error);
+      // 降级到普通形状处理
+      const scale = {
+        x: el.width / el.viewBox[0],
+        y: el.height / el.viewBox[1],
+      };
+      const points = formatPoints(toPoints(el.path), scale);
+      let fillColor = formatColor(el.fill);
+      if (el.gradient) {
+        const colors = el.gradient.colors;
+        const color1 = colors[0].color;
+        const color2 = colors[colors.length - 1].color;
+        const color = tinycolor.mix(color1, color2).toHexString();
+        fillColor = formatColor(color);
+      }
+      const opacity = el.opacity === undefined ? 1 : el.opacity;
+      const options: pptxgen.ShapeProps = {
+        x: el.left / ratioPx2Inch.value,
+        y: el.top / ratioPx2Inch.value,
+        w: el.width / ratioPx2Inch.value,
+        h: el.height / ratioPx2Inch.value,
+        fill: { color: fillColor.color, transparency: (1 - fillColor.alpha * opacity) * 100 },
+        points,
+      };
+      if (el.flipH) options.flipH = el.flipH;
+      if (el.flipV) options.flipV = el.flipV;
+      if (el.shadow) options.shadow = getShadowOption(el.shadow);
+      if (el.outline?.width) options.line = getOutlineOption(el.outline);
+      if (el.rotate) options.rotate = el.rotate;
+      pptxSlide.addShape('custGeom' as pptxgen.ShapeType, options);
+      continue;
+    }
+    // 成功获取SVG的情况
+    if (base64SVG) {
+      const options: pptxgen.ImageProps = {
+        data: base64SVG,
+        x: el.left / ratioPx2Inch.value,
+        y: el.top / ratioPx2Inch.value,
+        w: el.width / ratioPx2Inch.value,
+        h: el.height / ratioPx2Inch.value,
+      };
+      if (el.rotate) options.rotate = el.rotate;
+      if (el.flipH) options.flipH = el.flipH;
+      if (el.flipV) options.flipV = el.flipV;
+      if (el.link) {
+        const linkOption = getLinkOption(el.link);
+        if (linkOption) options.hyperlink = linkOption;
+      }
+      pptxSlide.addImage(options);
+    }
+  }
+  // 普通形状处理逻辑保持不变
+  else {
+    // 现有的普通形状处理代码...
+  }
+}
+```
+## 实施步骤
+1. **立即修复**: 实施方案1，改进尺寸检查逻辑
+2. **增强稳定性**: 实施方案2，添加渲染等待机制
+3. **提升兼容性**: 实施方案3，改进SVG处理
+4. **添加容错**: 实施方案4，添加降级处理
+## 测试验证
+使用提供的 `debug_vector_export.html` 文件进行测试：
+1. 打开调试页面
+2. 运行所有测试
+3. 检查SVG序列化和Base64转换是否正常
+4. 验证元素尺寸检测逻辑
+## 预期效果
+修复后应该能够：
+- 正确导出所有类型的矢量元素
+- 提供详细的错误日志用于问题排查
+- 在特殊情况下提供降级处理方案
+- 提高导出成功率和稳定性