fix(UI): 优化市值热力图和概念统计列表交互

- StockOverview: 启用热力图面包屑导航，支持返回上一级
- ConceptStatsPanel: 移除统计列表 400px 高度限制，改为自适应高度

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

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

src/views/StockOverview/index.js

@@ -392,7 +392,27 @@ const StockOverview = () => {
           leafDepth: 1,
           roam: false,
           breadcrumb: {
-            show: false
+            show: true,
+            top: 10,
+            left: 10,
+            itemStyle: {
+              color: colorMode === 'dark' ? '#1a1a2e' : '#f0f0f0',
+              borderColor: colorMode === 'dark' ? goldColor : '#ccc',
+              borderWidth: 1,
+              shadowBlur: colorMode === 'dark' ? 5 : 0,
+              shadowColor: colorMode === 'dark' ? `${goldColor}40` : 'transparent',
+              textStyle: {
+                color: colorMode === 'dark' ? goldColor : '#333'
+              }
+            },
+            emphasis: {
+              itemStyle: {
+                color: colorMode === 'dark' ? goldColor : '#e0e0e0',
+                textStyle: {
+                  color: colorMode === 'dark' ? '#0a0a0a' : '#333'
+                }
+              }
+            }
           },
 
           levels: [