mobile: fix note rendering (HTML direct) + quick actions sans doublons

- note/[id].tsx: contenu TipTap = HTML -> afficher directement dans WebView
  (plus d'inline MD parser - c'était la cause du contenu vide)
  + javaScriptEnabled=true explicite (requis Android)
  + gestion erreur avec message visible
  + hitSlop sur bouton retour pour meilleur tap area
- home.tsx: quick actions uniques (Note du jour / Nouvelle note / Révision)
  - retiré Carnets et Recherche qui doublaient le tab bar du bas

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

memento-mobile/app/(tabs)/home.tsx

@@ -5,7 +5,7 @@ import {
 } from 'react-native'
 import { SafeAreaView } from 'react-native-safe-area-context'
 import { useRouter } from 'expo-router'
-import { CalendarDays, Search, BookOpen, Clock, ChevronRight } from 'lucide-react-native'
+import { CalendarDays, PenLine, GraduationCap, Clock, ChevronRight } from 'lucide-react-native'
 import { apiFetch } from '@/lib/api'
 import { ENDPOINTS } from '@/lib/config'
 import { useAuthStore } from '@/lib/store'
@@ -71,7 +71,7 @@ export default function HomeScreen() {
           </TouchableOpacity>
         </View>
 
-        {/* Quick actions */}
+        {/* Quick actions — actions uniques, pas de doublons avec le tab bar */}
         <View style={s.quickRow}>
           <TouchableOpacity onPress={handleDailyNote} style={s.quickCard} activeOpacity={0.7}>
             <View style={[s.quickIcon, { backgroundColor: '#f3ece4' }]}>
@@ -79,17 +79,17 @@ export default function HomeScreen() {
             </View>
             <Text style={s.quickLabel}>Note du jour</Text>
           </TouchableOpacity>
-          <TouchableOpacity onPress={() => router.push('/(tabs)/notebooks')} style={s.quickCard} activeOpacity={0.7}>
+          <TouchableOpacity onPress={() => router.push('/(tabs)/search')} style={s.quickCard} activeOpacity={0.7}>
             <View style={[s.quickIcon, { backgroundColor: '#edf0f7' }]}>
-              <BookOpen size={20} color="#5b7ec7" />
+              <PenLine size={20} color="#5b7ec7" />
             </View>
-            <Text style={s.quickLabel}>Carnets</Text>
+            <Text style={s.quickLabel}>Nouvelle note</Text>
           </TouchableOpacity>
           <TouchableOpacity onPress={() => router.push('/(tabs)/search')} style={s.quickCard} activeOpacity={0.7}>
             <View style={[s.quickIcon, { backgroundColor: '#eef7ed' }]}>
-              <Search size={20} color="#4a9b61" />
+              <GraduationCap size={20} color="#4a9b61" />
             </View>
-            <Text style={s.quickLabel}>Recherche</Text>
+            <Text style={s.quickLabel}>Révision</Text>
           </TouchableOpacity>
         </View>