diff --git a/mobile/app/_layout.tsx b/mobile/app/_layout.tsx
index 862f1f7..d5cc56a 100644
--- a/mobile/app/_layout.tsx
+++ b/mobile/app/_layout.tsx
@@ -48,6 +48,7 @@ export default function RootLayout() {
         <Stack screenOptions={{ headerShown: false }}>
           <Stack.Screen name="auth" />
           <Stack.Screen name="(tabs)" />
+          <Stack.Screen name="admin" />
         </Stack>
       </AuthGuard>
       <StatusBar style="auto" />
diff --git a/mobile/components/ui/AppBar.tsx b/mobile/components/ui/AppBar.tsx
new file mode 100644
index 0000000..3f36c92
--- /dev/null
+++ b/mobile/components/ui/AppBar.tsx
@@ -0,0 +1,78 @@
+import { StyleSheet, Text, View } from 'react-native';
+import { Colors } from '@/lib/colors';
+import { FontSize, FontWeight, Spacing } from '@/lib/theme';
+
+interface AppBarProps {
+  /** Titre de la page, affiché sous le bandeau institutionnel. */
+  title?: string;
+  subtitle?: string;
+  /** Élément optionnel aligné à droite du bandeau (ex. bouton). */
+  right?: React.ReactNode;
+}
+
+/**
+ * Bandeau institutionnel République Française réutilisable, à placer en haut
+ * de chaque écran principal. Reprend le bloc-marque de l'État (DSFR) + le nom
+ * du service, avec un titre/sous-titre de page optionnel.
+ */
+export default function AppBar({ title, subtitle, right }: AppBarProps) {
+  return (
+    <View style={styles.wrapper}>
+      <View style={styles.brandRow}>
+        <View style={styles.marianne}>
+          <Text style={styles.republique}>RÉPUBLIQUE</Text>
+          <Text style={styles.republique}>FRANÇAISE</Text>
+        </View>
+        <View style={styles.serviceBlock}>
+          <Text style={styles.serviceName}>CESIZen</Text>
+          <Text style={styles.serviceTagline}>Santé mentale</Text>
+        </View>
+        {right ? <View style={styles.right}>{right}</View> : null}
+      </View>
+      {title ? (
+        <View style={styles.titleRow}>
+          <Text style={styles.title}>{title}</Text>
+          {subtitle ? <Text style={styles.subtitle}>{subtitle}</Text> : null}
+        </View>
+      ) : null}
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  wrapper: {
+    backgroundColor: Colors.white,
+    borderBottomWidth: 1,
+    borderBottomColor: Colors.gray[200],
+  },
+  brandRow: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    paddingHorizontal: Spacing.lg,
+    paddingVertical: Spacing.md,
+  },
+  marianne: {
+    paddingRight: Spacing.md,
+    marginRight: Spacing.md,
+    borderRightWidth: 1,
+    borderRightColor: Colors.gray[200],
+  },
+  republique: {
+    fontSize: FontSize.tiny,
+    fontWeight: FontWeight.bold,
+    color: Colors.black,
+    letterSpacing: 0.5,
+    lineHeight: 13,
+  },
+  serviceBlock: { flex: 1 },
+  serviceName: { fontSize: FontSize.lg, fontWeight: FontWeight.heavy, color: Colors.primary },
+  serviceTagline: { fontSize: FontSize.tiny, color: Colors.gray[500], marginTop: 1 },
+  right: { marginLeft: Spacing.sm },
+  titleRow: {
+    paddingHorizontal: Spacing.lg,
+    paddingBottom: Spacing.md,
+    paddingTop: Spacing.xs,
+  },
+  title: { fontSize: FontSize.xxl, fontWeight: FontWeight.bold, color: Colors.black },
+  subtitle: { fontSize: FontSize.sm, color: Colors.gray[500], marginTop: 2 },
+});
diff --git a/mobile/components/ui/Badge.tsx b/mobile/components/ui/Badge.tsx
new file mode 100644
index 0000000..0aa1409
--- /dev/null
+++ b/mobile/components/ui/Badge.tsx
@@ -0,0 +1,56 @@
+import { StyleSheet, Text, View } from 'react-native';
+import { Colors } from '@/lib/colors';
+import { FontSize, FontWeight, Radius, Spacing } from '@/lib/theme';
+
+type Tone = 'neutral' | 'success' | 'error' | 'info' | 'warning' | 'primary';
+
+interface BadgeProps {
+  label: string;
+  tone?: Tone;
+  /** Couleur personnalisée (ex. couleur d'une émotion) — prioritaire sur `tone`. */
+  color?: string;
+  uppercase?: boolean;
+}
+
+/** Pastille d'état DSFR, taille homogène. */
+export default function Badge({ label, tone = 'neutral', color, uppercase = false }: BadgeProps) {
+  const palette = color ? { bg: hexWithAlpha(color, 0.14), text: darken(color) } : TONES[tone];
+  return (
+    <View style={[styles.badge, { backgroundColor: palette.bg }]}>
+      <Text style={[styles.text, { color: palette.text }, uppercase && styles.uppercase]} numberOfLines={1}>
+        {label}
+      </Text>
+    </View>
+  );
+}
+
+const TONES: Record<Tone, { bg: string; text: string }> = {
+  neutral: { bg: Colors.gray[100], text: Colors.gray[600] },
+  success: { bg: Colors.successBg, text: Colors.success },
+  error: { bg: Colors.errorBg, text: Colors.error },
+  info: { bg: '#E8EDFF', text: Colors.info },
+  warning: { bg: '#FFE9C7', text: Colors.warning },
+  primary: { bg: '#E3E3FD', text: Colors.primary },
+};
+
+/** Ajoute un canal alpha (0–1) à une couleur hex #RRGGBB. */
+function hexWithAlpha(hex: string, alpha: number): string {
+  const a = Math.round(alpha * 255).toString(16).padStart(2, '0');
+  return `${hex}${a}`;
+}
+
+/** Pour le texte sur fond teinté, on garde la couleur d'origine (lisible sur 14% d'alpha). */
+function darken(hex: string): string {
+  return hex;
+}
+
+const styles = StyleSheet.create({
+  badge: {
+    alignSelf: 'flex-start',
+    paddingHorizontal: Spacing.sm,
+    paddingVertical: 3,
+    borderRadius: Radius.sm,
+  },
+  text: { fontSize: FontSize.tiny, fontWeight: FontWeight.bold },
+  uppercase: { textTransform: 'uppercase', letterSpacing: 0.5 },
+});
diff --git a/mobile/components/ui/Button.tsx b/mobile/components/ui/Button.tsx
new file mode 100644
index 0000000..ee859b8
--- /dev/null
+++ b/mobile/components/ui/Button.tsx
@@ -0,0 +1,93 @@
+import { ActivityIndicator, Pressable, StyleSheet, Text, View, type StyleProp, type ViewStyle } from 'react-native';
+import { Ionicons } from '@expo/vector-icons';
+import { Colors } from '@/lib/colors';
+import { FontSize, FontWeight, MIN_TOUCH, Radius, Spacing } from '@/lib/theme';
+
+type Variant = 'primary' | 'secondary' | 'danger' | 'tertiary';
+type Size = 'md' | 'sm';
+
+interface ButtonProps {
+  title: string;
+  onPress?: () => void;
+  variant?: Variant;
+  size?: Size;
+  loading?: boolean;
+  disabled?: boolean;
+  /** Nom d'icône Ionicons affichée à gauche du libellé. */
+  icon?: keyof typeof Ionicons.glyphMap;
+  fullWidth?: boolean;
+  style?: StyleProp<ViewStyle>;
+}
+
+/**
+ * Bouton DSFR. 4 variantes : primary (bleu plein), secondary (contour),
+ * danger (rouge plein), tertiary (texte seul). Hauteur ≥ 44px (accessibilité).
+ */
+export default function Button({
+  title,
+  onPress,
+  variant = 'primary',
+  size = 'md',
+  loading = false,
+  disabled = false,
+  icon,
+  fullWidth = false,
+  style,
+}: ButtonProps) {
+  const isDisabled = disabled || loading;
+  const palette = VARIANTS[variant];
+  const minHeight = size === 'sm' ? 40 : MIN_TOUCH;
+  const fontSize = size === 'sm' ? FontSize.sm : FontSize.md;
+
+  return (
+    <Pressable
+      onPress={onPress}
+      disabled={isDisabled}
+      accessibilityRole="button"
+      accessibilityState={{ disabled: isDisabled, busy: loading }}
+      style={({ pressed }) => [
+        styles.base,
+        {
+          minHeight,
+          paddingVertical: size === 'sm' ? Spacing.sm : Spacing.md,
+          backgroundColor: palette.bg,
+          borderColor: palette.border,
+          borderWidth: palette.border === 'transparent' ? 0 : 1,
+        },
+        fullWidth && styles.fullWidth,
+        pressed && !isDisabled && { opacity: 0.85 },
+        isDisabled && styles.disabled,
+        style,
+      ]}
+    >
+      {loading ? (
+        <ActivityIndicator color={palette.text} size="small" />
+      ) : (
+        <View style={styles.content}>
+          {icon && <Ionicons name={icon} size={fontSize + 3} color={palette.text} />}
+          <Text style={[styles.label, { color: palette.text, fontSize }]}>{title}</Text>
+        </View>
+      )}
+    </Pressable>
+  );
+}
+
+const VARIANTS: Record<Variant, { bg: string; text: string; border: string }> = {
+  primary: { bg: Colors.primary, text: Colors.white, border: 'transparent' },
+  secondary: { bg: Colors.white, text: Colors.primary, border: Colors.primary },
+  danger: { bg: Colors.error, text: Colors.white, border: 'transparent' },
+  tertiary: { bg: 'transparent', text: Colors.primary, border: 'transparent' },
+};
+
+const styles = StyleSheet.create({
+  base: {
+    borderRadius: Radius.sm,
+    paddingHorizontal: Spacing.xl,
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  fullWidth: { alignSelf: 'stretch', width: '100%' },
+  disabled: { opacity: 0.45 },
+  content: { flexDirection: 'row', alignItems: 'center', gap: Spacing.sm },
+  label: { fontWeight: FontWeight.semibold },
+});
diff --git a/mobile/components/ui/Card.tsx b/mobile/components/ui/Card.tsx
new file mode 100644
index 0000000..4f83a27
--- /dev/null
+++ b/mobile/components/ui/Card.tsx
@@ -0,0 +1,42 @@
+import { Pressable, StyleSheet, View, type StyleProp, type ViewStyle } from 'react-native';
+import { Colors } from '@/lib/colors';
+import { Radius, Shadow, Spacing } from '@/lib/theme';
+
+interface CardProps {
+  children: React.ReactNode;
+  onPress?: () => void;
+  /** Padding interne (défaut lg = 16). Mettre 0 pour gérer soi-même. */
+  padding?: number;
+  /** Légère ombre portée. */
+  elevated?: boolean;
+  style?: StyleProp<ViewStyle>;
+}
+
+/** Conteneur DSFR : fond blanc, bordure grise fine, coins peu arrondis. */
+export default function Card({ children, onPress, padding = Spacing.lg, elevated = false, style }: CardProps) {
+  const content = [styles.card, { padding }, elevated && Shadow.card, style];
+
+  if (onPress) {
+    return (
+      <Pressable
+        onPress={onPress}
+        accessibilityRole="button"
+        style={({ pressed }) => [content, pressed && styles.pressed]}
+      >
+        {children}
+      </Pressable>
+    );
+  }
+
+  return <View style={content}>{children}</View>;
+}
+
+const styles = StyleSheet.create({
+  card: {
+    backgroundColor: Colors.white,
+    borderWidth: 1,
+    borderColor: Colors.gray[200],
+    borderRadius: Radius.sm,
+  },
+  pressed: { backgroundColor: Colors.gray[50] },
+});
diff --git a/mobile/components/ui/EmptyState.tsx b/mobile/components/ui/EmptyState.tsx
new file mode 100644
index 0000000..c117d2b
--- /dev/null
+++ b/mobile/components/ui/EmptyState.tsx
@@ -0,0 +1,47 @@
+import { StyleSheet, Text, View } from 'react-native';
+import { Ionicons } from '@expo/vector-icons';
+import { Colors } from '@/lib/colors';
+import { FontSize, FontWeight, Radius, Spacing } from '@/lib/theme';
+import Button from './Button';
+
+interface EmptyStateProps {
+  icon?: keyof typeof Ionicons.glyphMap;
+  title: string;
+  message?: string;
+  actionLabel?: string;
+  onAction?: () => void;
+}
+
+/** État vide homogène : icône, titre, message et action optionnelle. */
+export default function EmptyState({ icon = 'document-text-outline', title, message, actionLabel, onAction }: EmptyStateProps) {
+  return (
+    <View style={styles.container}>
+      <View style={styles.iconCircle}>
+        <Ionicons name={icon} size={32} color={Colors.primary} />
+      </View>
+      <Text style={styles.title}>{title}</Text>
+      {message ? <Text style={styles.message}>{message}</Text> : null}
+      {actionLabel && onAction ? (
+        <View style={styles.action}>
+          <Button title={actionLabel} onPress={onAction} icon="add" />
+        </View>
+      ) : null}
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: { alignItems: 'center', justifyContent: 'center', paddingVertical: Spacing.xxxl, paddingHorizontal: Spacing.xl },
+  iconCircle: {
+    width: 72,
+    height: 72,
+    borderRadius: Radius.pill,
+    backgroundColor: '#E3E3FD',
+    alignItems: 'center',
+    justifyContent: 'center',
+    marginBottom: Spacing.lg,
+  },
+  title: { fontSize: FontSize.lg, fontWeight: FontWeight.bold, color: Colors.black, textAlign: 'center' },
+  message: { fontSize: FontSize.sm, color: Colors.gray[500], textAlign: 'center', marginTop: Spacing.sm, lineHeight: 20 },
+  action: { marginTop: Spacing.xl },
+});
diff --git a/mobile/components/ui/Loader.tsx b/mobile/components/ui/Loader.tsx
new file mode 100644
index 0000000..fdc44b3
--- /dev/null
+++ b/mobile/components/ui/Loader.tsx
@@ -0,0 +1,18 @@
+import { ActivityIndicator, StyleSheet, Text, View } from 'react-native';
+import { Colors } from '@/lib/colors';
+import { FontSize, Spacing } from '@/lib/theme';
+
+/** Indicateur de chargement centré et homogène, avec libellé optionnel. */
+export default function Loader({ label }: { label?: string }) {
+  return (
+    <View style={styles.container}>
+      <ActivityIndicator size="large" color={Colors.primary} />
+      {label ? <Text style={styles.label}>{label}</Text> : null}
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: { flex: 1, alignItems: 'center', justifyContent: 'center', padding: Spacing.xl, backgroundColor: Colors.gray[50] },
+  label: { marginTop: Spacing.md, fontSize: FontSize.sm, color: Colors.gray[500] },
+});
diff --git a/mobile/components/ui/SectionTitle.tsx b/mobile/components/ui/SectionTitle.tsx
new file mode 100644
index 0000000..1c5a883
--- /dev/null
+++ b/mobile/components/ui/SectionTitle.tsx
@@ -0,0 +1,19 @@
+import { StyleSheet, Text } from 'react-native';
+import { Colors } from '@/lib/colors';
+import { FontSize, FontWeight, Spacing } from '@/lib/theme';
+
+/** Intitulé de section (petites capitales DSFR) au-dessus d'une liste/groupe. */
+export default function SectionTitle({ children }: { children: string }) {
+  return <Text style={styles.title}>{children}</Text>;
+}
+
+const styles = StyleSheet.create({
+  title: {
+    fontSize: FontSize.xs,
+    fontWeight: FontWeight.bold,
+    color: Colors.gray[500],
+    textTransform: 'uppercase',
+    letterSpacing: 1,
+    marginBottom: Spacing.sm,
+  },
+});
diff --git a/mobile/components/ui/TextField.tsx b/mobile/components/ui/TextField.tsx
new file mode 100644
index 0000000..31fc68a
--- /dev/null
+++ b/mobile/components/ui/TextField.tsx
@@ -0,0 +1,122 @@
+import { useState } from 'react';
+import {
+  StyleSheet,
+  Text,
+  TextInput,
+  View,
+  type KeyboardTypeOptions,
+  type StyleProp,
+  type TextInputProps,
+  type ViewStyle,
+} from 'react-native';
+import { Ionicons } from '@expo/vector-icons';
+import { Colors } from '@/lib/colors';
+import { FontSize, FontWeight, Radius, Spacing } from '@/lib/theme';
+
+interface TextFieldProps {
+  label: string;
+  value: string;
+  onChangeText: (text: string) => void;
+  placeholder?: string;
+  error?: string;
+  helper?: string;
+  required?: boolean;
+  secureTextEntry?: boolean;
+  keyboardType?: KeyboardTypeOptions;
+  autoCapitalize?: TextInputProps['autoCapitalize'];
+  autoComplete?: TextInputProps['autoComplete'];
+  multiline?: boolean;
+  numberOfLines?: number;
+  editable?: boolean;
+  style?: StyleProp<ViewStyle>;
+}
+
+/**
+ * Champ de saisie DSFR : libellé au-dessus, fond gris clair, bordure basse
+ * accentuée (bleu au focus, rouge en erreur), message d'erreur sous le champ.
+ */
+export default function TextField({
+  label,
+  value,
+  onChangeText,
+  placeholder,
+  error,
+  helper,
+  required = false,
+  secureTextEntry = false,
+  keyboardType,
+  autoCapitalize = 'none',
+  autoComplete,
+  multiline = false,
+  numberOfLines,
+  editable = true,
+  style,
+}: TextFieldProps) {
+  const [focused, setFocused] = useState(false);
+  const borderColor = error ? Colors.error : focused ? Colors.primary : Colors.gray[600];
+
+  return (
+    <View style={[styles.container, style]}>
+      <Text style={styles.label}>
+        {label}
+        {required && <Text style={styles.required}> *</Text>}
+      </Text>
+      <TextInput
+        value={value}
+        onChangeText={onChangeText}
+        onFocus={() => setFocused(true)}
+        onBlur={() => setFocused(false)}
+        placeholder={placeholder}
+        placeholderTextColor={Colors.gray[400]}
+        secureTextEntry={secureTextEntry}
+        keyboardType={keyboardType}
+        autoCapitalize={autoCapitalize}
+        autoComplete={autoComplete}
+        multiline={multiline}
+        numberOfLines={numberOfLines}
+        editable={editable}
+        style={[
+          styles.input,
+          { borderBottomColor: borderColor },
+          multiline && styles.multiline,
+          !editable && styles.readonly,
+        ]}
+      />
+      {error ? (
+        <View style={styles.messageRow}>
+          <Ionicons name="alert-circle" size={14} color={Colors.error} />
+          <Text style={styles.errorText}>{error}</Text>
+        </View>
+      ) : helper ? (
+        <Text style={styles.helperText}>{helper}</Text>
+      ) : null}
+    </View>
+  );
+}
+
+const styles = StyleSheet.create({
+  container: { marginBottom: Spacing.lg },
+  label: {
+    fontSize: FontSize.sm,
+    fontWeight: FontWeight.medium,
+    color: Colors.black,
+    marginBottom: Spacing.xs,
+  },
+  required: { color: Colors.error },
+  input: {
+    backgroundColor: Colors.gray[50],
+    borderTopLeftRadius: Radius.sm,
+    borderTopRightRadius: Radius.sm,
+    borderBottomWidth: 2,
+    paddingHorizontal: Spacing.md,
+    paddingVertical: Spacing.md,
+    fontSize: FontSize.body,
+    color: Colors.black,
+    minHeight: 44,
+  },
+  multiline: { minHeight: 110, textAlignVertical: 'top' },
+  readonly: { color: Colors.gray[500], backgroundColor: Colors.gray[100] },
+  messageRow: { flexDirection: 'row', alignItems: 'center', gap: Spacing.xs, marginTop: Spacing.xs },
+  errorText: { fontSize: FontSize.xs, color: Colors.error },
+  helperText: { fontSize: FontSize.xs, color: Colors.gray[500], marginTop: Spacing.xs },
+});
diff --git a/mobile/components/ui/index.ts b/mobile/components/ui/index.ts
new file mode 100644
index 0000000..1ce238e
--- /dev/null
+++ b/mobile/components/ui/index.ts
@@ -0,0 +1,9 @@
+// Barrel des composants UI DSFR réutilisables.
+export { default as AppBar } from './AppBar';
+export { default as Badge } from './Badge';
+export { default as Button } from './Button';
+export { default as Card } from './Card';
+export { default as EmptyState } from './EmptyState';
+export { default as Loader } from './Loader';
+export { default as SectionTitle } from './SectionTitle';
+export { default as TextField } from './TextField';
diff --git a/mobile/hooks/useAdmin.ts b/mobile/hooks/useAdmin.ts
new file mode 100644
index 0000000..b77bd4a
--- /dev/null
+++ b/mobile/hooks/useAdmin.ts
@@ -0,0 +1,123 @@
+import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
+import api from '@/lib/api';
+import type { Emotion, Feed, Utilisateur } from '@/types';
+
+// Toutes les requêtes ci-dessous tapent les routes /admin/* du backend,
+// protégées par le middleware role:administrateur.
+
+/** Normalise une réponse paginée Laravel ({data:[...]}) ou un tableau brut. */
+function unwrap<T>(payload: { data?: T } | T): T {
+  const body = payload as { data?: T };
+  return (body?.data ?? payload) as T;
+}
+
+// ----------------------------- Utilisateurs --------------------------------
+
+export function useAdminUtilisateurs() {
+  return useQuery<Utilisateur[]>({
+    queryKey: ['admin', 'utilisateurs'],
+    queryFn: async () => unwrap<Utilisateur[]>((await api.get('/admin/utilisateurs')).data),
+  });
+}
+
+export interface NouvelUtilisateur {
+  nom: string;
+  prenom: string;
+  email: string;
+  password: string;
+  password_confirmation: string;
+  role_id: number;
+}
+
+export function useCreateUtilisateur() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: async (data: NouvelUtilisateur) => (await api.post('/admin/utilisateurs', data)).data,
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['admin', 'utilisateurs'] }),
+  });
+}
+
+export function useToggleUtilisateurActif() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: async (id: number) => (await api.patch(`/admin/utilisateurs/${id}/toggle-active`)).data,
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['admin', 'utilisateurs'] }),
+  });
+}
+
+export function useDeleteUtilisateur() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: async (id: number) => (await api.delete(`/admin/utilisateurs/${id}`)).data,
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['admin', 'utilisateurs'] }),
+  });
+}
+
+// -------------------------------- Feeds ------------------------------------
+
+export function useAdminFeeds() {
+  return useQuery<Feed[]>({
+    queryKey: ['admin', 'feeds'],
+    queryFn: async () => unwrap<Feed[]>((await api.get('/admin/feeds')).data),
+  });
+}
+
+export interface FeedPayload {
+  titre: string;
+  contenu: string;
+  image_url?: string | null;
+  est_publie: boolean;
+  ordre: number;
+}
+
+export function useSaveFeed() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: async ({ id, ...data }: FeedPayload & { id?: number }) =>
+      id ? (await api.put(`/admin/feeds/${id}`, data)).data : (await api.post('/admin/feeds', data)).data,
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['admin', 'feeds'] }),
+  });
+}
+
+export function useDeleteFeed() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: async (id: number) => (await api.delete(`/admin/feeds/${id}`)).data,
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['admin', 'feeds'] }),
+  });
+}
+
+// ------------------------------- Émotions ----------------------------------
+
+export function useAdminEmotions() {
+  return useQuery<Emotion[]>({
+    queryKey: ['admin', 'emotions'],
+    queryFn: async () => unwrap<Emotion[]>((await api.get('/admin/emotions')).data),
+  });
+}
+
+export interface EmotionPayload {
+  nom: string;
+  couleur: string;
+  icone?: string | null;
+  niveau: number;
+  parent_id?: number | null;
+  est_actif: boolean;
+}
+
+export function useSaveEmotion() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: async ({ id, ...data }: EmotionPayload & { id?: number }) =>
+      id ? (await api.put(`/admin/emotions/${id}`, data)).data : (await api.post('/admin/emotions', data)).data,
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['admin', 'emotions'] }),
+  });
+}
+
+export function useDeleteEmotion() {
+  const qc = useQueryClient();
+  return useMutation({
+    mutationFn: async (id: number) => (await api.delete(`/admin/emotions/${id}`)).data,
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['admin', 'emotions'] }),
+  });
+}
diff --git a/mobile/lib/theme.ts b/mobile/lib/theme.ts
new file mode 100644
index 0000000..d948e36
--- /dev/null
+++ b/mobile/lib/theme.ts
@@ -0,0 +1,66 @@
+// Design tokens centralisés — identité du Système de Design de l'État (DSFR).
+// À utiliser partout au lieu de valeurs « magiques » inline, pour une UI cohérente.
+
+/** Espacements (échelle 4px, comme le DSFR). */
+export const Spacing = {
+  xs: 4,
+  sm: 8,
+  md: 12,
+  lg: 16,
+  xl: 24,
+  xxl: 32,
+  xxxl: 40,
+} as const;
+
+/** Rayons de bordure. Le DSFR est volontairement « carré » (rayons faibles). */
+export const Radius = {
+  sm: 4,
+  md: 8,
+  pill: 999,
+} as const;
+
+/** Tailles de police. */
+export const FontSize = {
+  tiny: 11,
+  xs: 13,
+  sm: 14,
+  body: 15,
+  md: 16,
+  lg: 18,
+  xl: 20,
+  xxl: 24,
+  display: 32,
+} as const;
+
+/** Graisses (typées pour React Native). */
+export const FontWeight = {
+  regular: '400',
+  medium: '500',
+  semibold: '600',
+  bold: '700',
+  heavy: '800',
+} as const;
+
+/** Ombres douces, discrètes (le DSFR reste sobre). */
+export const Shadow = {
+  card: {
+    shadowColor: '#161616',
+    shadowOffset: { width: 0, height: 1 },
+    shadowOpacity: 0.06,
+    shadowRadius: 4,
+    elevation: 1,
+  },
+  raised: {
+    shadowColor: '#161616',
+    shadowOffset: { width: 0, height: 4 },
+    shadowOpacity: 0.12,
+    shadowRadius: 10,
+    elevation: 4,
+  },
+} as const;
+
+/** Cible tactile minimale recommandée (accessibilité). */
+export const MIN_TOUCH = 44;
+
+/** hitSlop standard pour agrandir la zone cliquable des petites icônes. */
+export const HIT_SLOP = { top: 10, bottom: 10, left: 10, right: 10 } as const;