fix(analytics): 柱色对齐图例、刷新智能定位 tab、视图更名

- custom series 补 itemStyle.color，使柱色与 legend/tooltip 色点一致
- activeTab 根据 URL 参数智能初始化（选人→人员视图，选设备→轨迹流转）
- 视图及页头文案从「个人能力图谱/设备流转对比」改为「人员视图/轨迹流转」

frontend/src/pages/admin/AnalyticsDashboard.tsx

@@ -74,7 +74,13 @@ export default function AnalyticsDashboard() {
     (searchParams.get("product_sns") || searchParams.get("product_sn") || searchParams.get("sn") || "")
       .split(",").filter(Boolean),
   );
-  const [activeTab, setActiveTab] = useState("capability");
+  const [activeTab, setActiveTab] = useState<"capability" | "flow">(() => {
+    // 根据 URL 参数智能判断初始 tab：选了人 → 个人能力图谱；没选人但选了设备 → 设备流转对比
+    const hasAssignee = (searchParams.get("assignee_id") || "").split(",").filter(Boolean).length > 0;
+    const hasDevice = (searchParams.get("product_sns") || searchParams.get("product_sn") || searchParams.get("sn") || "")
+      .split(",").filter(Boolean).length > 0;
+    return !hasAssignee && hasDevice ? "flow" : "capability";
+  });
 
   // ─── 下拉选项 + 数据 ─────────────────────────────────────
   const [options, setOptions] = useState<AnalyticsOptions>({ assignees: [], spec_models: [], devices: [] });
@@ -425,6 +431,7 @@ export default function AnalyticsDashboard() {
           name: s.name,
           type: "custom" as const,
           z: 2,
+          itemStyle: { color: BRANCH_COLORS[index % BRANCH_COLORS.length] },
           dimensions: ['device', 'start', 'end', 'task', 'duration', 'is_main'],
           encode: { x: 0, y: [1, 2] },
           renderItem: (params: any, api: any) => {
@@ -477,7 +484,7 @@ export default function AnalyticsDashboard() {
       <div className="flex flex-wrap items-center justify-between gap-3">
         <div>
           <h2 className="text-xl font-bold text-gray-800">📊 效能分析看板</h2>
-          <p className="mt-0.5 text-sm text-gray-400">个人能力图谱 / 设备流转对比 · ECharts 可视化</p>
+          <p className="mt-0.5 text-sm text-gray-400">人员视图 / 轨迹流转 · ECharts 可视化</p>
         </div>
       </div>
 
@@ -643,12 +650,12 @@ export default function AnalyticsDashboard() {
             label: (
               <span className="flex items-center gap-1.5">
                 <Users className="h-3.5 w-3.5" />
-                个人能力图谱
+                人员视图
               </span>
             ),
             children: (
               <div className="rounded-xl bg-white p-4 shadow-sm">
-                <h3 className="mb-2 text-sm font-semibold text-gray-700">个人能力图谱（单台设备耗时 · 点击柱子查看备注）</h3>
+                <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>
                 {capabilityLoading && !capability ? (
                   <div className="flex h-[420px] items-center justify-center">
                     <Loader2 className="h-8 w-8 animate-spin text-blue-500" />
@@ -656,7 +663,7 @@ export default function AnalyticsDashboard() {
                 ) : capabilityEmpty ? (
                   <div className="flex h-[420px] items-center justify-center">
                     <Empty
-                      description={assigneeIds.length === 0 ? "请先选择人员查看能力图谱" : "暂无数据"}
+                      description={assigneeIds.length === 0 ? "请先选择人员查看" : "暂无数据"}
                     />
                   </div>
                 ) : (
@@ -674,12 +681,12 @@ export default function AnalyticsDashboard() {
             label: (
               <span className="flex items-center gap-1.5">
                 <GitBranch className="h-3.5 w-3.5" />
-                设备流转对比
+                轨迹流转
               </span>
             ),
             children: (
               <div className="rounded-xl bg-white p-4 shadow-sm">
-                <h3 className="mb-2 text-sm font-semibold text-gray-700">设备生命周期时间轴（按人区间 · 并行任务并排显示）</h3>
+                <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>
                 {flowLoading && !flow ? (
                   <div className="flex h-[380px] items-center justify-center">
                     <Loader2 className="h-8 w-8 animate-spin text-blue-500" />
@@ -687,7 +694,7 @@ export default function AnalyticsDashboard() {
                 ) : flowEmpty ? (
                   <div className="flex h-[380px] items-center justify-center">
                     <Empty
-                      description={specModels.length === 0 && productSns.length === 0 ? "请先选择规格型号或输入设备身份证查看流转" : "暂无数据"}
+                      description={specModels.length === 0 && productSns.length === 0 ? "请先选择规格型号或输入设备身份证查看流转轨迹" : "暂无数据"}
                     />
                   </div>
                 ) : (