fix(Concept): 修复历史时间轴图例颜色与日历不一致

- 将「涨3%+」图例边框颜色从 orange.400 改为 red.500
- 与日历中高涨幅事件背景色 (#F56565) 统一

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

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

src/views/Concept/ConceptTimelineModal.js

@@ -825,7 +825,7 @@ const ConceptTimelineModal = ({
                                         bg="whiteAlpha.100"
                                         borderRadius="lg"
                                         border="1px solid"
-                                        borderColor="orange.400"
+                                        borderColor="red.500"
                                         flexShrink={0}
                                     >
                                         <Text fontSize={{ base: 'xs', md: 'sm' }} fontWeight="bold">🔥</Text>