perf(CompanyHeader): 性能优化与代码重构

- 移除不必要的 PageTitle 子组件（纯静态内容，memo 无意义）
- 提取样式常量到 constants.ts，避免每次渲染重新创建对象
- 简化 SearchBox props，移除未使用的 stockCode
- 点击搜索图标支持发起搜索
- 移除未使用的 FUI_GLASS 导入
- 简化 CompanyHeaderProps 类型定义

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

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

src/views/Company/components/CompanyHeader/constants.ts

@@ -0,0 +1,70 @@
+/**
+ * CompanyHeader 组件常量
+ */
+
+import { FUI_COLORS, FUI_GLOW, FUI_ANIMATION } from '../../theme/fui';
+
+/** 下拉菜单样式 */
+export const DROPDOWN_STYLE: React.CSSProperties = {
+  backgroundColor: FUI_COLORS.bg.elevated,
+  borderRadius: '6px',
+  border: `1px solid ${FUI_COLORS.gold[400]}`,
+  boxShadow: '0 4px 20px rgba(0, 0, 0, 0.5)',
+};
+
+/** 搜索图标样式 */
+export const SEARCH_ICON_STYLE: React.CSSProperties = {
+  color: FUI_COLORS.gold[400],
+  fontSize: 16,
+  cursor: 'pointer',
+};
+
+/** 输入框样式 */
+export const INPUT_STYLE: React.CSSProperties = {
+  backgroundColor: 'transparent',
+  borderColor: FUI_COLORS.gold[400],
+  borderRadius: 6,
+  height: 44,
+  color: FUI_COLORS.gold[400],
+};
+
+/** AutoComplete 宽度样式 */
+export const AUTOCOMPLETE_STYLE: React.CSSProperties = {
+  width: 320,
+};
+
+/** 搜索框容器样式 */
+export const SEARCH_BOX_SX = {
+  '.ant-select': {
+    width: '320px !important',
+  },
+  '.ant-input-affix-wrapper': {
+    backgroundColor: 'transparent !important',
+    borderColor: `${FUI_COLORS.gold[400]} !important`,
+    borderWidth: '1px !important',
+    borderRadius: '6px !important',
+    height: '44px !important',
+    padding: '0 12px !important',
+    transition: `all ${FUI_ANIMATION.duration.fast} ${FUI_ANIMATION.easing.default}`,
+    '&:hover': {
+      borderColor: `${FUI_COLORS.gold[300]} !important`,
+      boxShadow: FUI_GLOW.gold.sm,
+    },
+    '&:focus-within, &.ant-input-affix-wrapper-focused': {
+      borderColor: `${FUI_COLORS.gold[300]} !important`,
+      boxShadow: `${FUI_GLOW.gold.md} !important`,
+    },
+  },
+  '.ant-input': {
+    backgroundColor: 'transparent !important',
+    color: `${FUI_COLORS.gold[400]} !important`,
+    fontSize: '14px !important',
+    '&::placeholder': {
+      color: `${FUI_COLORS.gold[400]} !important`,
+      opacity: '0.7 !important',
+    },
+  },
+  '.ant-input-prefix': {
+    marginRight: '8px !important',
+  },
+} as const;