feat: 新增饼图/雷达图图表类型

- 单图模式图表类型新增：饼图（环形占比，第一列=名称/第一系列=数值）、雷达图（多维度对比，第一列=维度/每系列=多边形）
- 多图合并的每张图也可选饼图/雷达图
- 后端 /api/chart 与 /api/combine 的 chartType 支持 pie/radar
- 饼图/雷达图自动隐藏坐标轴/网格/双轴等不适用配置

app.js

@@ -157,6 +157,91 @@ function initChart() {
     });
 }
 
+// ===== 饼图/雷达图 option 构建 =====
+function buildPieRadarOption(chartType) {
+    if (!parsedData || parsedData.seriesNames.length === 0) return null;
+    const title = document.getElementById('chartTitle').value;
+    const theme = document.getElementById('themeStyle').value;
+    const showLegend = document.getElementById('showLegend').checked;
+    const showLabel = document.getElementById('showLabel').checked;
+    const bgColor = theme === 'dark' ? '#1a1a2e' : '#ffffff';
+    const textColor = theme === 'dark' ? '#e0e0e0' : '#333333';
+    const palette = colorPalettes[theme] || colorPalettes.default;
+    const colors = seriesOrder.map((origIdx, di) => seriesColors[origIdx] || palette[di % palette.length]);
+
+    const baseTitle = title ? {
+        text: title, left: 'center', top: 10,
+        textStyle: { color: textColor, fontSize: 18, fontWeight: 600 }
+    } : undefined;
+
+    if (chartType === 'pie') {
+        // 饼图：第一列=名称，第一个系列=数值
+        const sName = parsedData.seriesNames[0];
+        const data = parsedData.seriesData[sName];
+        const pieData = parsedData.categories.map((c, i) => ({ name: c, value: data[i] || 0 }));
+        return {
+            backgroundColor: bgColor,
+            title: baseTitle,
+            tooltip: { trigger: 'item', formatter: '{b}: {c} ({d}%)' },
+            legend: showLegend ? {
+                orient: 'vertical', left: 'left', top: title ? 50 : 20,
+                textStyle: { color: textColor, fontSize: 12 }
+            } : { show: false },
+            color: colors,
+            series: [{
+                type: 'pie',
+                radius: ['38%', '68%'],
+                center: ['52%', '55%'],
+                avoidLabelOverlap: true,
+                itemStyle: { borderRadius: 6, borderColor: bgColor, borderWidth: 2 },
+                label: { show: showLabel, formatter: '{b}: {d}%', color: textColor },
+                labelLine: { show: showLabel },
+                data: pieData
+            }]
+        };
+    } else {
+        // 雷达图：第一列=维度名，每个系列=一个雷达多边形
+        const indicator = parsedData.categories.map(c => {
+            let max = 0;
+            parsedData.seriesNames.forEach(n => {
+                parsedData.seriesData[n].forEach(v => { if (v > max) max = v; });
+            });
+            return { name: c, max: Math.ceil(max * 1.2) || 100 };
+        });
+        return {
+            backgroundColor: bgColor,
+            title: baseTitle,
+            tooltip: { trigger: 'item' },
+            legend: showLegend ? {
+                orient: 'horizontal', left: 'center', top: title ? 48 : 15,
+                textStyle: { color: textColor, fontSize: 12 }
+            } : { show: false },
+            color: colors,
+            radar: {
+                indicator,
+                radius: '62%',
+                center: ['50%', '55%'],
+                splitNumber: 5,
+                axisName: { color: textColor, fontSize: 12 },
+                splitLine: { lineStyle: { color: theme === 'dark' ? '#444' : '#ddd' } },
+                splitArea: {
+                    areaStyle: {
+                        color: theme === 'dark' ? ['rgba(79,195,247,0.03)', 'rgba(79,195,247,0.06)'] : ['rgba(79,70,229,0.03)', 'rgba(79,70,229,0.06)']
+                    }
+                },
+                axisLine: { lineStyle: { color: theme === 'dark' ? '#444' : '#ddd' } }
+            },
+            series: parsedData.seriesNames.map(n => ({
+                type: 'radar',
+                name: n,
+                data: [{ value: parsedData.seriesData[n], name: n }],
+                symbolSize: 4,
+                areaStyle: { opacity: 0.15 }
+            }))
+        };
+    }
+}
+
 // ===== 更新图表 =====
 function updateChart() {
     if (!parsedData || !chartInstance) return;
@@ -174,6 +259,16 @@ function updateChart() {
     const leftAxisName = document.getElementById('leftAxisName').value;
     const rightAxisName = document.getElementById('rightAxisName').value;
 
+    // 饼图/雷达图：走专用构建逻辑（无坐标轴/网格，不支持双轴/堆叠/分割）
+    if (chartType === 'pie' || chartType === 'radar') {
+        const option = buildPieRadarOption(chartType);
+        if (option) {
+            chartInstance.setOption(option, true);
+            refreshPreview();
+        }
+        return;
+    }
+
     // 显示/隐藏分割配置
     document.getElementById('splitConfig').style.display = enableSplit ? 'block' : 'none';
 
@@ -1058,6 +1153,66 @@ function buildCombineChartOption(dataText, cfg) {
     const axisLineColor = theme === 'dark' ? '#444' : '#ddd';
     const palette = colorPalettes[theme] || colorPalettes.default;
 
+    // 饼图/雷达图：专用构建逻辑
+    if (chartType === 'pie' || chartType === 'radar') {
+        if (chartType === 'pie') {
+            const sName = parsed.seriesNames[0];
+            const data = parsed.seriesData[sName];
+            const pieData = parsed.categories.map((c, i) => ({ name: c, value: data[i] || 0 }));
+            return {
+                backgroundColor: bgColor,
+                title: title ? { text: title, left: 'center', top: 10, textStyle: { color: textColor, fontSize: 16, fontWeight: 600 } } : undefined,
+                tooltip: { trigger: 'item', formatter: '{b}: {c} ({d}%)' },
+                legend: showLegend ? { orient: 'vertical', left: 'left', top: title ? 40 : 10, textStyle: { color: textColor, fontSize: 12 } } : { show: false },
+                color: palette,
+                series: [{
+                    type: 'pie',
+                    radius: ['38%', '68%'],
+                    center: ['55%', '55%'],
+                    itemStyle: { borderRadius: 6, borderColor: bgColor, borderWidth: 2 },
+                    label: { show: showLabel, formatter: '{b}: {d}%', color: textColor },
+                    labelLine: { show: showLabel },
+                    data: pieData
+                }],
+                animation: false
+            };
+        } else {
+            const indicator = parsed.categories.map(c => {
+                let max = 0;
+                parsed.seriesNames.forEach(n => { parsed.seriesData[n].forEach(v => { if (v > max) max = v; }); });
+                return { name: c, max: Math.ceil(max * 1.2) || 100 };
+            });
+            return {
+                backgroundColor: bgColor,
+                title: title ? { text: title, left: 'center', top: 10, textStyle: { color: textColor, fontSize: 16, fontWeight: 600 } } : undefined,
+                tooltip: { trigger: 'item' },
+                legend: showLegend ? { orient: 'horizontal', left: 'center', top: title ? 38 : 10, textStyle: { color: textColor, fontSize: 12 } } : { show: false },
+                color: palette,
+                radar: {
+                    indicator,
+                    radius: '62%',
+                    center: ['50%', '55%'],
+                    splitNumber: 5,
+                    axisName: { color: textColor, fontSize: 11 },
+                    splitLine: { lineStyle: { color: theme === 'dark' ? '#444' : '#ddd' } },
+                    splitArea: {
+                        areaStyle: {
+                            color: theme === 'dark' ? ['rgba(79,195,247,0.03)', 'rgba(79,195,247,0.06)'] : ['rgba(79,70,229,0.03)', 'rgba(79,70,229,0.06)']
+                        }
+                    },
+                    axisLine: { lineStyle: { color: theme === 'dark' ? '#444' : '#ddd' } }
+                },
+                series: parsed.seriesNames.map(n => ({
+                    type: 'radar', name: n,
+                    data: [{ value: parsed.seriesData[n], name: n }],
+                    symbolSize: 4,
+                    areaStyle: { opacity: 0.15 }
+                })),
+                animation: false
+            };
+        }
+    }
+
     const series = parsed.seriesNames.map((name, idx) => {
         const color = palette[idx % palette.length];
         let type = chartType === 'bar-line' ? (idx % 2 === 0 ? 'bar' : 'line') : chartType;
@@ -1177,7 +1332,7 @@ function initCombineCharts() {
     renderCombineCharts();
 }
 
-const COMBINE_TYPES = [['bar', '柱状图'], ['line', '折线图'], ['bar-line', '柱状图+折线图混合']];
+const COMBINE_TYPES = [['bar', '柱状图'], ['line', '折线图'], ['bar-line', '柱状图+折线图混合'], ['pie', '饼图'], ['radar', '雷达图']];
 const COMBINE_THEMES = [['default', '默认'], ['dark', '深色'], ['macarons', '马卡龙'], ['gradient', '渐变'], ['retro', '复古'], ['ocean', '海洋'], ['forest', '森林'], ['sunset', '日落'], ['lavender', '薰衣草'], ['minimal', '极简'], ['cherry', '樱花'], ['midnight', '午夜'], ['gold', '金色'], ['coral', '珊瑚'], ['mint', '薄荷'], ['slate', '石板灰'], ['sky', '天空蓝'], ['rose', '玫瑰红'], ['amber', '琥珀黄'], ['emerald', '翡翠绿'], ['indigo', '靛蓝色'], ['stone', '石灰白']];
 
 function escHtml(str) {