feat(#6): add randomized fake startup loader with suitcase progress

src/AppRoot.js

@@ -63,6 +63,8 @@ export default function AppRoot() {
   const scrollRef = useRef(null);
 
   const [loaded, setLoaded] = useState(false);
+  const [fakeLoadDone, setFakeLoadDone] = useState(false);
+  const [fakeLoadProgress, setFakeLoadProgress] = useState(0);
   const [tab, setTab] = useState('trips');
   const [data, setData] = useState(emptyData);
 
@@ -83,6 +85,8 @@ export default function AppRoot() {
   const [dialogState, setDialogState] = useState({ visible: false, title: '', message: '', buttons: [] });
 
   const topInset = Platform.OS === 'android' ? (RNStatusBar.currentHeight || 0) + 10 : 0;
+  const fakeLoadTotalMs = useMemo(() => 1200 + Math.floor(Math.random() * 2801), []);
+  const appReady = loaded && fakeLoadDone;
 
   const visibleTrips = useMemo(() => data.trips.filter((trip) => !trip.archived), [data.trips]);
 
@@ -165,6 +169,26 @@ export default function AppRoot() {
     })();
   }, []);
 
+  useEffect(() => {
+    const startedAt = Date.now();
+
+    const interval = setInterval(() => {
+      const elapsed = Date.now() - startedAt;
+      setFakeLoadProgress(Math.min(1, elapsed / fakeLoadTotalMs));
+    }, 60);
+
+    const timeout = setTimeout(() => {
+      setFakeLoadProgress(1);
+      setFakeLoadDone(true);
+      clearInterval(interval);
+    }, fakeLoadTotalMs);
+
+    return () => {
+      clearInterval(interval);
+      clearTimeout(timeout);
+    };
+  }, [fakeLoadTotalMs]);
+
   useEffect(() => {
     if (!loaded) return;
     AsyncStorage.setItem(STORAGE_KEY, JSON.stringify(data)).catch(() => {
@@ -733,12 +757,17 @@ export default function AppRoot() {
     openAddItemModal();
   }
 
-  if (!loaded) {
+  if (!appReady) {
     return (
       <SafeAreaView style={[styles.safe, { paddingTop: topInset }]}>
         <StatusBar style="light" translucent={false} />
         <View style={styles.center}>
-          <Text style={styles.muted}>Loading local data...</Text>
+          <Text style={styles.loadingEmoji}>🧳</Text>
+          <Text style={styles.loadingTitle}>Packing your list...</Text>
+          <View style={styles.loadingBarTrack}>
+            <View style={[styles.loadingBarFill, { width: `${Math.round(fakeLoadProgress * 100)}%` }]} />
+          </View>
+          <Text style={styles.muted}>{Math.round(fakeLoadProgress * 100)}%</Text>
         </View>
       </SafeAreaView>
     );