refactor(Center): 全面优化个人中心模块

- 目录重命名：Dashboard → Center（匹配路由 /home/center）
- 删除遗留代码：Default.js、InvestmentPlansAndReviews.js、InvestmentCalendarChakra.js（共 2596 行）
- 创建 src/types/center.ts 类型定义（15+ 接口）
- 性能优化：
  - 创建 useCenterColors Hook 封装 7 个 useColorModeValue
  - 创建 utils/formatters.ts 提取纯函数
  - 修复 loadRealtimeQuotes 的 useCallback 依赖项
  - InvestmentPlanningCenter 添加 useMemo 缓存
- TypeScript 迁移：Center.js → Center.tsx

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

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

src/views/Center/components/InvestmentCalendar.less

@@ -0,0 +1,123 @@
+// src/views/Dashboard/components/InvestmentCalendar.less
+
+// 颜色变量（与日历视图按钮一致的紫色）
+@primary-color: #805AD5;
+@primary-hover: #6B46C1;
+@border-color: #e2e8f0;
+@text-color: #2d3748;
+@today-bg: #e6f3ff;
+
+// 暗色模式颜色
+@dark-border-color: #4a5568;
+@dark-text-color: #e2e8f0;
+@dark-today-bg: #2d3748;
+
+// FullCalendar 自定义样式
+.fc {
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
+}
+
+// 工具栏按钮紧密排列（提升优先级）
+.fc .fc-toolbar.fc-header-toolbar {
+  justify-content: flex-start !important;
+  gap: 8px !important;
+}
+
+.fc .fc-toolbar-chunk:first-child {
+  display: flex !important;
+  gap: 4px !important;
+}
+
+.fc-theme-standard {
+  td, th {
+    border-color: @border-color;
+  }
+}
+
+// 按钮样式（针对 fc-button-group 内的按钮）
+.fc .fc-toolbar .fc-button-group .fc-button {
+  background-color: @primary-color !important;
+  border-color: @primary-color !important;
+  color: #fff !important;
+
+  &:hover {
+    background-color: @primary-hover !important;
+    border-color: @primary-hover !important;
+  }
+
+  &:not(:disabled):active,
+  &:not(:disabled).fc-button-active {
+    background-color: @primary-hover !important;
+    border-color: @primary-hover !important;
+  }
+}
+
+// 今天按钮样式
+.fc .fc-toolbar .fc-today-button {
+  background-color: @primary-color !important;
+  border-color: @primary-color !important;
+  color: #fff !important;
+
+  &:hover {
+    background-color: @primary-hover !important;
+    border-color: @primary-hover !important;
+  }
+
+  // 选中状态（disabled 表示当前视图包含今天）
+  &:disabled {
+    background-color: @primary-hover !important;
+    border-color: @primary-hover !important;
+    opacity: 1 !important;
+    color: #fff !important;
+  }
+}
+
+// 日期数字
+.fc-daygrid-day-number {
+  color: @text-color;
+  font-weight: 500;
+}
+
+// 今天高亮
+.fc-daygrid-day.fc-day-today {
+  background-color: @today-bg !important;
+  border: 2px solid @primary-color !important;
+}
+
+// 事件样式
+.fc-event {
+  border: none;
+  padding: 2px 4px;
+  font-size: 12px;
+  font-weight: 500;
+}
+
+.fc-daygrid-event-dot {
+  display: none;
+}
+
+.fc-daygrid-day-events {
+  margin-top: 2px;
+}
+
+// 暗色模式支持
+@media (prefers-color-scheme: dark) {
+  .fc-theme-standard {
+    td, th {
+      border-color: @dark-border-color;
+    }
+  }
+
+  .fc-daygrid-day-number {
+    color: @dark-text-color;
+  }
+
+  .fc-daygrid-day.fc-day-today {
+    background-color: @dark-today-bg !important;
+  }
+
+  .fc-col-header-cell-cushion,
+  .fc-daygrid-day-number {
+    color: @dark-text-color;
+  }
+}