feat(ux): onboarding checklist, dashboard-first landing (fixed)

Dashboard onboarding checklist: a dismissible card with 3 steps (add
CV, import first job, check match score), each linking straight to
where you'd do it. Auto-hides once both CV and a job exist; otherwise
persists per-user via localStorage until dismissed.

Fixes the actual authenticated-landing redirect to /dashboard: my
earlier commit changed App.tsx's inner Shell route for "/", which
turned out to be dead code -- the outer router claims "/" for
LandingPage first, so Shell's own "/" route is never reached on a
direct hit. The real redirect lives in LandingPage.tsx's post-auth-check
navigate() and LoginPage.tsx's post-login nextPath default; both now
point at /dashboard. Verified live: an authenticated visitor hitting
"/" now lands on Dashboard with the onboarding checklist visible,
confirmed via rendered page text and screenshot.

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

@@ -312,6 +312,15 @@ export const translations = {
     cropDialogSave: "Save image",
     dashboardOverviewTitle: "Dashboard overview",
     dashboardHeroLabel: "Job search overview",
+    onboardingTitle: "Get set up",
+    onboardingBody: "A few steps to get the most out of Jobbjakt.",
+    onboardingDismiss: "Dismiss",
+    onboardingStepCv: "Add your CV",
+    onboardingStepCvAction: "Add CV",
+    onboardingStepJob: "Import your first job",
+    onboardingStepJobAction: "Add job",
+    onboardingStepMatch: "Check your CV match score on a job",
+    onboardingStepMatchAction: "Open jobs",
     dashboardResponseRate: "{rate}% response rate",
     dashboardMonthsShort: "{count} mo",
     dashboardAppliedCount: "{count} applied",
@@ -1281,6 +1290,15 @@ export const translations = {
     cropDialogSave: "Lagre bilde",
     dashboardOverviewTitle: "Dashboard-oversikt",
     dashboardHeroLabel: "Oversikt over jobbsøket",
+    onboardingTitle: "Kom i gang",
+    onboardingBody: "Noen få steg for å få mest mulig ut av Jobbjakt.",
+    onboardingDismiss: "Lukk",
+    onboardingStepCv: "Legg til CV-en din",
+    onboardingStepCvAction: "Legg til CV",
+    onboardingStepJob: "Importer din første jobb",
+    onboardingStepJobAction: "Legg til jobb",
+    onboardingStepMatch: "Sjekk CV-matchscoren på en jobb",
+    onboardingStepMatchAction: "Åpne jobber",
     dashboardResponseRate: "{rate}% svarrate",
     dashboardMonthsShort: "{count} md",
     dashboardAppliedCount: "{count} søkt",