fix: percent labels, background opacity, border radius

- Percent label format: calculate actual % from total instead of {d}
- Value labels: use toLocaleString for thousand separators
- Background opacity: convert hex+opacity to rgba
- Border radius: apply to ECharts container div

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/adapters/gateways/EChartsOptionBuilder/barOptionBuilder.ts

@@ -46,7 +46,19 @@ function applyCommonStyle(option: Record<string, any>, style: StyleConfig): void
   }
 
   option.color = style.colors;
-  option.backgroundColor = style.background.color !== '' ? style.background.color : 'transparent';
+  // Convert background color + opacity to rgba
+  const bgColor = style.background.color || 'transparent';
+  const bgOpacity = style.background.opacity ?? 1;
+  if (bgColor !== 'transparent' && bgOpacity < 1) {
+    // Parse hex to rgba
+    const hex = bgColor.replace('#', '');
+    const r = parseInt(hex.substring(0, 2), 16) || 0;
+    const g = parseInt(hex.substring(2, 4), 16) || 0;
+    const b = parseInt(hex.substring(4, 6), 16) || 0;
+    option.backgroundColor = `rgba(${r},${g},${b},${bgOpacity})`;
+  } else {
+    option.backgroundColor = bgColor;
+  }
 
   if (style.animation.enabled) {
     option.animation = true;
@@ -121,27 +133,36 @@ function buildAxisConfig(style: StyleConfig, isHorizontal: boolean) {
   return { xAxis, yAxis };
 }
 
-function buildLabelConfig(style: StyleConfig) {
+function buildLabelConfig(style: StyleConfig, data?: number[]) {
   if (!style.dataLabel.visible) return { show: false };
-  let formatter: string | undefined;
-  switch (style.dataLabel.format) {
-    case 'percent':
-      formatter = '{b}: {d}%';
-      break;
-    case 'custom':
-      formatter = style.dataLabel.template;
-      break;
-    case 'value':
-    default:
-      formatter = '{c}';
-      break;
+
+  const position = style.dataLabel.position ?? 'top';
+  const fontSize = style.dataLabel.fontSize ?? 12;
+  const color = style.dataLabel.color ?? '#333';
+
+  if (style.dataLabel.format === 'percent' && data) {
+    const total = data.reduce((a, b) => a + (typeof b === 'number' ? b : 0), 0);
+    return {
+      show: true, fontSize, color, position,
+      formatter: (params: any) => {
+        const val = typeof params.value === 'object' ? params.value.value ?? params.value : params.value;
+        const pct = total > 0 ? ((val / total) * 100).toFixed(1) : '0';
+        return pct + '%';
+      },
+    };
   }
+
+  if (style.dataLabel.format === 'custom' && style.dataLabel.template) {
+    return { show: true, fontSize, color, position, formatter: style.dataLabel.template };
+  }
+
+  // Default: value
   return {
-    show: true,
-    fontSize: style.dataLabel.fontSize,
-    color: style.dataLabel.color,
-    position: style.dataLabel.position,
-    formatter,
+    show: true, fontSize, color, position,
+    formatter: (params: any) => {
+      const val = typeof params.value === 'object' ? params.value.value ?? params.value : params.value;
+      return typeof val === 'number' ? val.toLocaleString() : String(val);
+    },
   };
 }
 
@@ -168,11 +189,6 @@ export function buildBarOption(
   const categories = [...new Set(data.map((row) => String(row[xField])))];
   const { xAxis, yAxis } = buildAxisConfig(style, isHorizontal);
 
-  // If a label binding exists, force show data labels
-  const label = labelBinding
-    ? { show: true, position: 'top' as const, fontSize: 12, formatter: '{c}' }
-    : buildLabelConfig(style);
-
   const colorBinding = getBinding(bindings, 'color');
   const splitField = seriesBinding?.columnName ?? colorBinding?.columnName;
   const hasSplit = !!splitField;
@@ -180,10 +196,13 @@ export function buildBarOption(
   if (hasSplit) {
     // Multi-series: split by series or color field
     const splitNames = [...new Set(data.map((row) => String(row[splitField])))];
+    const allNums = data.map((r) => Number(r[yField]) || 0);
+    const label = labelBinding
+      ? { show: true, position: 'top' as const, fontSize: 12, formatter: (p: any) => (typeof p.value === 'number' ? p.value.toLocaleString() : String(p.value)) }
+      : buildLabelConfig(style, allNums);
 
     const seriesList = splitNames.map((name, idx) => {
       const seriesData = categories.map((cat) => {
-        // Sum all matching rows (there may be multiple)
         const matchingRows = data.filter(
           (r) => String(r[xField]) === cat && String(r[splitField]) === name,
         );
@@ -217,6 +236,9 @@ export function buildBarOption(
       const matchingRows = data.filter((r) => String(r[xField]) === cat);
       return matchingRows.reduce((sum, r) => sum + (Number(r[yField]) || 0), 0);
     });
+    const label = labelBinding
+      ? { show: true, position: 'top' as const, fontSize: 12, formatter: (p: any) => { const v = typeof p.value === 'object' ? p.value.value : p.value; return typeof v === 'number' ? v.toLocaleString() : String(v); } }
+      : buildLabelConfig(style, seriesData);
 
     if (isHorizontal) {
       option.yAxis = { ...xAxis, type: 'category', data: categories };

frontend/src/frameworks/components/charts/ChartRenderer.tsx

@@ -34,8 +34,10 @@ export const ChartRenderer: React.FC<ChartRendererProps> = ({ chart, data }) =>
     case 'data-table':
       return <DataTable chart={chart} data={data} />;
     default:
+      const borderRadius = chart.style?.background?.borderRadius ?? 0;
+      const overflow = borderRadius > 0 ? 'hidden' as const : undefined;
       return echartsOption
-        ? <EChartsBase option={echartsOption} style={{ width: '100%', height: '100%', minHeight: 250 }} />
+        ? <EChartsBase option={echartsOption} style={{ width: '100%', height: '100%', minHeight: 250, borderRadius, overflow }} />
         : <div style={{ padding: 16, color: '#999', textAlign: 'center' }}>请绑定数据字段</div>;
   }
 };