feat(ui): time-in-stage on the dashboard + localized funnel labels

- Adds a 'Median time in stage' block to the conversion-funnel card
  showing median days and active count per stage from the enriched
  analytics-overview endpoint.
- Funnel bar labels and stage names now render through the shared
  pipeline statusLabel (localized; the funnel also now includes Waiting).
- EN/NB translations. Full frontend suite green (20 suites / 46 tests).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

job-tracker-ui/src/i18n/translations.ts

@@ -335,6 +335,8 @@ export const translations = {
     dashboardApplicationActivity: "Application activity",
     dashboardMonthlyApplicationsResponses: "Monthly applications versus responses.",
     dashboardConversionFunnelTitle: "Conversion funnel",
+    dashboardTimeInStageTitle: "Median time in stage",
+    dashboardTimeInStageValue: "{days}d · {count} active",
     dashboardResponseSources: "Response sources",
     dashboardTopCompaniesByActivity: "Top companies by activity",
     dashboardTopSkills: "Top skills",
@@ -1266,6 +1268,8 @@ export const translations = {
     dashboardApplicationActivity: "Søknadsaktivitet",
     dashboardMonthlyApplicationsResponses: "Månedlige søknader versus svar.",
     dashboardConversionFunnelTitle: "Konverteringstrakt",
+    dashboardTimeInStageTitle: "Median tid i fase",
+    dashboardTimeInStageValue: "{days}d · {count} aktive",
     dashboardResponseSources: "Svar etter kilde",
     dashboardTopCompaniesByActivity: "Topp selskaper etter aktivitet",
     dashboardTopSkills: "Topp ferdigheter",