style(MainBusinessAnalysis): 优化主营业务饼图布局避免遮挡

- 简化标题为"主营业务构成（报告期）"，移除冗余副标题
- 图例从左侧垂直改为底部水平排列，避免与饼图重叠
- 饼图居中显示（center: 50%, 48%）
- 饼图标签简化为仅显示百分比

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/views/Company/components/FinancialPanorama/components/MainBusinessAnalysis.tsx

@@ -248,8 +248,8 @@ export const MainBusinessAnalysis: React.FC<MainBusinessAnalysisProps> = ({
     }));
 
   const pieOption = getMainBusinessPieOption(
-    `主营业务构成 - ${latestPeriod.report_type}`,
-    dataSource === 'industry' ? '按行业分类' : '按产品分类',
+    `主营业务构成（${latestPeriod.report_type}）`,
+    '',
     pieData
   );
 

src/views/Company/components/FinancialPanorama/utils/chartOptions.ts

@@ -238,22 +238,18 @@ const BLACK_GOLD_PIE_COLORS = chartTheme.goldSeries;
  */
 export const getMainBusinessPieOption = (
   title: string,
-  subtitle: string,
+  _subtitle: string,
   data: { name: string; value: number }[]
 ) => {
   return {
     title: {
       text: title,
-      subtext: subtitle,
       left: 'center',
+      top: 0,
       textStyle: {
         color: fui.gold,
         fontSize: 14,
       },
-      subtextStyle: {
-        color: '#A0AEC0',
-        fontSize: 12,
-      },
     },
     tooltip: {
       trigger: 'item',
@@ -269,26 +265,29 @@ export const getMainBusinessPieOption = (
       },
     },
     legend: {
-      orient: 'vertical',
-      left: 'left',
-      top: 'center',
+      orient: 'horizontal',
+      bottom: 0,
+      left: 'center',
       textStyle: {
         color: '#E2E8F0',
-        fontSize: 12,
+        fontSize: 11,
       },
+      itemWidth: 12,
+      itemHeight: 12,
+      itemGap: 8,
     },
     color: BLACK_GOLD_PIE_COLORS,
     series: [
       {
         type: 'pie',
-        radius: '55%',
-        center: ['55%', '50%'],
+        radius: '50%',
+        center: ['50%', '48%'],
         data: data,
         label: {
           show: true,
           color: '#E2E8F0',
           fontSize: 11,
-          formatter: '{b}: {d}%',
+          formatter: '{d}%',
         },
         labelLine: {
           lineStyle: {