feat: 版本管理，package.json 唯一版本源、/api/meta 返回版本、Dashboard Header 展示版本号

src/web/app.tsx

@@ -6,7 +6,7 @@ import { Alert, Layout, Menu, RadioGroup, Skeleton } from "tdesign-react";
 import { RefreshCountdown } from "./components/RefreshCountdown";
 import { SummaryCards } from "./components/SummaryCards";
 import { TargetBoard } from "./components/TargetBoard";
-import { useDashboard } from "./hooks/use-queries";
+import { useDashboard, useMeta } from "./hooks/use-queries";
 import { useTargetDetail } from "./hooks/use-target-detail";
 import { type ThemePreference, useThemePreference } from "./hooks/use-theme-preference";
 
@@ -46,6 +46,7 @@ export function App() {
     isLoading: dashboardLoading,
     refetch: refetchDashboard,
   } = useDashboard(dashboardRefetchInterval);
+  const { data: meta } = useMeta();
   const {
     activeTab,
     closeDrawer,
@@ -62,6 +63,7 @@ export function App() {
     timeTo,
   } = useTargetDetail();
   const isManualRefresh = refreshInterval === 0;
+  const versionDisplay = meta?.version ? `v${meta.version}` : null;
 
   const handleIntervalChange = (value: number) => {
     void refetchDashboard();
@@ -80,6 +82,7 @@ export function App() {
             <span className="dashboard-brand">
               <span className="dashboard-logo">DiAL</span>
               <span className="dashboard-subtitle">统一拨测平台</span>
+              {versionDisplay && <span className="dashboard-version">{versionDisplay}</span>}
             </span>
           }
           operations={

src/web/styles.css

@@ -46,6 +46,12 @@
   font-weight: 400;
 }
 
+.dashboard-version {
+  color: var(--td-text-color-placeholder);
+  font-size: var(--td-font-size-body-small);
+  font-weight: 400;
+}
+
 .dashboard-header-controls {
   display: inline-flex;
   align-items: center;