feat(steady): 完善稳态数据视图功能

- 更新纵坐标刻度算法，优化小数趋势图范围显示
- 添加稳态趋势图全屏模式和共享工具组件
- 实现多图联动的鼠标悬停竖线同步功能
- 调整主线线宽分档策略，降低最大线宽限制
- 重构稳态趋势工具栏，优化谐波次数选择逻辑
- 添加周时间周期搜索支持和自定义时间范围选择
- 完善稳态数据表格和指示器浮动面板功能
- 优化稳态趋势图性能，添加LTB采样和动画控制
- 修复数据表格打开前的趋势数据验证问题
- 统一时间轴标签格式化和网格对齐处理

frontend/src/views/components/TimePeriodSearch/timePeriod.ts

@@ -1,21 +1,27 @@
-export type TimePeriodUnit = 'day' | 'month' | 'year'
+export type TimePeriodUnit = 'day' | 'week' | 'month' | 'year' | 'custom'
 
 export const timePeriodUnitOptions: { label: string; value: TimePeriodUnit }[] = [
     { label: '日', value: 'day' },
+    { label: '周', value: 'week' },
     { label: '月', value: 'month' },
-    { label: '年', value: 'year' }
+    { label: '年', value: 'year' },
+    { label: '自定义', value: 'custom' }
 ]
 
 const datePickerTypeMap: Record<TimePeriodUnit, 'date' | 'month' | 'year'> = {
     day: 'date',
+    week: 'date',
     month: 'month',
-    year: 'year'
+    year: 'year',
+    custom: 'date'
 }
 
 const datePickerFormatMap: Record<TimePeriodUnit, string> = {
     day: 'YYYY-MM-DD',
+    week: 'YYYY-MM-DD',
     month: 'YYYY-MM',
-    year: 'YYYY'
+    year: 'YYYY',
+    custom: 'YYYY-MM-DD'
 }
 
 const padTimeValue = (value: number, length = 2) => String(value).padStart(length, '0')
@@ -52,6 +58,23 @@ export const buildTimePeriodRange = (unit: TimePeriodUnit, date: Date): string[]
         ]
     }
 
+    if (unit === 'week') {
+        const dayOfWeek = date.getDay()
+        const mondayOffset = dayOfWeek === 0 ? -6 : 1 - dayOfWeek
+        const weekStart = new Date(year, month, day + mondayOffset, 0, 0, 0, 0)
+        const weekEnd = new Date(
+            weekStart.getFullYear(),
+            weekStart.getMonth(),
+            weekStart.getDate() + 6,
+            23,
+            59,
+            59,
+            999
+        )
+
+        return [formatTimePeriodDateTime(weekStart), formatTimePeriodDateTime(weekEnd)]
+    }
+
     if (unit === 'year') {
         return [
             formatTimePeriodDateTime(new Date(year, 0, 1, 0, 0, 0, 0)),
@@ -78,6 +101,11 @@ export const shiftTimePeriod = (unit: TimePeriodUnit, date: Date, offset: number
         return nextDate
     }
 
+    if (unit === 'week') {
+        nextDate.setDate(nextDate.getDate() + offset * 7)
+        return nextDate
+    }
+
     // 月份切换以 1 日为锚点，避免 31 日切到短月份时发生日期溢出。
     nextDate.setDate(1)
     nextDate.setMonth(nextDate.getMonth() + offset)