feat(mobile): consent-gate i auth-flödet

apps/mobile/src/app/(tabs)/_layout.tsx

@@ -1,12 +1,14 @@
 import { Redirect, Tabs } from "expo-router";
 import { Text } from "react-native";
 import { useQuery } from "@tanstack/react-query";
-import { api } from "@/lib/api";
+import { api, getConsent, type ConsentStatus } from "@/lib/api";
 import { persistLanguageTag, useAuth } from "@/lib/auth";
 import { colors } from "@/lib/theme";
 import { getLanguageTag, t } from "@/lib/i18n";
 import { setMeasurementSystem, setUnitLanguage } from "@/lib/units";
+import { ConsentScreen } from "@/components/ConsentScreen";
 import type { MeasurementSystem } from "@app/shared-types";
+import { TERMS_VERSION } from "@app/shared-types";
 
 function TabIcon({ glyph, focused }: { glyph: string; focused: boolean }) {
   return <Text style={{ fontSize: 22, opacity: focused ? 1 : 0.45 }}>{glyph}</Text>;
@@ -39,7 +41,18 @@ export default function TabsLayout() {
   const onboardingStep = useAuth((s) => s.onboardingStep);
   useApplyLocalePreferences(Boolean(accessToken));
 
+  const { data: consent, isLoading: consentLoading } = useQuery<ConsentStatus>({
+    queryKey: ["consent"],
+    queryFn: getConsent,
+    enabled: Boolean(accessToken),
+    staleTime: 60_000,
+  });
+
   if (!accessToken) return <Redirect href="/(auth)/login" />;
+  if (consentLoading) return null;
+  if (!consent?.accepted || consent.version !== TERMS_VERSION) {
+    return <ConsentScreen onAccepted={() => {}} />;
+  }
   // Progressive onboarding (FAS 1b): only block if step A not done
   if (!onboardingCompleted && onboardingStep === "a") return <Redirect href="/onboarding" />;