fix(效能分析): 自然天/工作日切换按钮移至各视图顶部，全选长图也能看到

- 人员视图、轨迹流转 tab 内容顶部各加切换按钮
- 全选所有人导致图很长时，按钮固定在视图顶部不被挤出屏幕

frontend/src/pages/admin/AnalyticsDashboard.tsx

@@ -739,7 +739,19 @@ export default function AnalyticsDashboard() {
             ),
             children: (
               <div className="rounded-xl bg-white p-4 shadow-sm">
-                <h3 className="mb-2 text-sm font-semibold text-gray-700">人员视图（单台设备耗时 · 点击柱子查看备注）</h3>
+                <div className="mb-2 flex items-center justify-between">
+                  <h3 className="text-sm font-semibold text-gray-700">人员视图（单台设备耗时 · 点击柱子查看备注）</h3>
+                  <Radio.Group
+                    value={totalDaysMode}
+                    onChange={e => setTotalDaysMode(e.target.value)}
+                    size="small"
+                    optionType="button"
+                    buttonStyle="solid"
+                  >
+                    <Radio.Button value="natural">自然天</Radio.Button>
+                    <Radio.Button value="workdays">工作日</Radio.Button>
+                  </Radio.Group>
+                </div>
                 {capabilityLoading && !capability ? (
                   <div className="flex h-[420px] items-center justify-center">
                     <Loader2 className="h-8 w-8 animate-spin text-blue-500" />
@@ -774,7 +786,19 @@ export default function AnalyticsDashboard() {
             ),
             children: (
               <div className="rounded-xl bg-white p-4 shadow-sm">
-                <h3 className="mb-2 text-sm font-semibold text-gray-700">轨迹流转（按人区间 · 并行任务并排显示）</h3>
+                <div className="mb-2 flex items-center justify-between">
+                  <h3 className="text-sm font-semibold text-gray-700">轨迹流转（按人区间 · 并行任务并排显示）</h3>
+                  <Radio.Group
+                    value={totalDaysMode}
+                    onChange={e => setTotalDaysMode(e.target.value)}
+                    size="small"
+                    optionType="button"
+                    buttonStyle="solid"
+                  >
+                    <Radio.Button value="natural">自然天</Radio.Button>
+                    <Radio.Button value="workdays">工作日</Radio.Button>
+                  </Radio.Group>
+                </div>
                 {flowLoading && !flow ? (
                   <div className="flex h-[380px] items-center justify-center">
                     <Loader2 className="h-8 w-8 animate-spin text-blue-500" />