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/Concept/components/ConceptStatsPanel.js

@@ -260,24 +260,7 @@ const ConceptStatsPanel = ({ apiBaseUrl, onConceptClick }) => {
                     ))}
                 </VStack>
             ) : (
-                <VStack spacing={2} align="stretch" maxH="400px" overflowY="auto"
-                    css={{
-                        '&::-webkit-scrollbar': {
-                            width: '4px',
-                        },
-                        '&::-webkit-scrollbar-track': {
-                            background: 'rgba(255,255,255,0.05)',
-                            borderRadius: '10px',
-                        },
-                        '&::-webkit-scrollbar-thumb': {
-                            background: 'rgba(255,255,255,0.2)',
-                            borderRadius: '10px',
-                        },
-                        '&::-webkit-scrollbar-thumb:hover': {
-                            background: 'rgba(255,255,255,0.3)',
-                        },
-                    }}
-                >
+                <VStack spacing={2} align="stretch">
                     {data?.map((item, index) => (
                         <Box key={index}>
                             {renderItem(item, index)}