refactor: split app into modular src architecture

TODO.md

@@ -27,3 +27,5 @@ Improving & Fixing Bugs (V2)
 - [x] V1 prototype complete and shipped
 - [x] CI adjusted (no `eas init` in workflows)
 - [x] V2 redesign + behavior fixes implemented
+- [x] Removed legacy template src folder
+- [x] Rebuilt app into modular `src/` structure (tabs/components/modals/styles/utils)

src/AppRoot.js

@@ -0,0 +1,556 @@
+import React, { useEffect, useMemo, useRef, useState } from 'react';
+import { Alert, KeyboardAvoidingView, Platform, SafeAreaView, ScrollView, Text, View } from 'react-native';
+import AsyncStorage from '@react-native-async-storage/async-storage';
+import * as ImagePicker from 'expo-image-picker';
+import { StatusBar } from 'expo-status-bar';
+import BottomTab from './components/BottomTab';
+import TripPicker from './components/TripPicker';
+import ItemModal from './modals/ItemModal';
+import CheckupFixModal from './modals/CheckupFixModal';
+import TripsTab from './tabs/TripsTab';
+import ItemsTab from './tabs/ItemsTab';
+import CheckupTab from './tabs/CheckupTab';
+import HistoryTab from './tabs/HistoryTab';
+import { emptyData, STORAGE_KEY } from './constants';
+import { findActiveTripId, makeId, parseYMD, todayYMD } from './utils/date';
+import { styles } from './styles';
+
+const emptyTripForm = () => ({
+  name: '',
+  location: '',
+  startDate: todayYMD(),
+  endDate: todayYMD(),
+  imageUri: '',
+  copyDefaultTemplate: true,
+  setAsDefaultTemplate: false,
+});
+
+const emptyItemForm = () => ({
+  id: null,
+  name: '',
+  description: '',
+  category: '',
+  status: 'unpacked',
+  placement: 'suitcase',
+  lentTo: '',
+  imageUri: '',
+});
+
+export default function AppRoot() {
+  const scrollRef = useRef(null);
+
+  const [loaded, setLoaded] = useState(false);
+  const [tab, setTab] = useState('trips');
+  const [data, setData] = useState(emptyData);
+
+  const [selectedTripId, setSelectedTripId] = useState(null);
+  const [tripForm, setTripForm] = useState(emptyTripForm());
+
+  const [itemModalVisible, setItemModalVisible] = useState(false);
+  const [itemForm, setItemForm] = useState(emptyItemForm());
+
+  const [checkupSession, setCheckupSession] = useState([]);
+  const [checkupFixModalVisible, setCheckupFixModalVisible] = useState(false);
+  const [checkupFixTargetId, setCheckupFixTargetId] = useState(null);
+  const [checkupFixForm, setCheckupFixForm] = useState({
+    status: 'unpacked',
+    placement: 'suitcase',
+    lentTo: '',
+    updateMasterList: false,
+  });
+
+  const [selectedCheckupId, setSelectedCheckupId] = useState(null);
+
+  const selectedTrip = useMemo(() => data.trips.find((trip) => trip.id === selectedTripId) || null, [data.trips, selectedTripId]);
+
+  const selectedTripItems = useMemo(() => {
+    if (!selectedTripId) return [];
+    return data.itemsByTrip[selectedTripId] || [];
+  }, [data.itemsByTrip, selectedTripId]);
+
+  const selectedTripCheckups = useMemo(() => {
+    if (!selectedTripId) return [];
+    return (data.checkupsByTrip[selectedTripId] || []).slice().sort((a, b) => b.createdAt - a.createdAt);
+  }, [data.checkupsByTrip, selectedTripId]);
+
+  const templateTrip = useMemo(
+    () => data.trips.find((trip) => trip.id === data.defaultTemplateTripId) || null,
+    [data.trips, data.defaultTemplateTripId]
+  );
+
+  useEffect(() => {
+    (async () => {
+      try {
+        const raw = await AsyncStorage.getItem(STORAGE_KEY);
+        if (raw) {
+          const parsed = JSON.parse(raw);
+          setData({ ...emptyData, ...parsed });
+        }
+      } catch {
+        Alert.alert('Error', 'Could not load local data.');
+      } finally {
+        setLoaded(true);
+      }
+    })();
+  }, []);
+
+  useEffect(() => {
+    if (!loaded) return;
+    AsyncStorage.setItem(STORAGE_KEY, JSON.stringify(data)).catch(() => {
+      Alert.alert('Error', 'Could not save local data.');
+    });
+  }, [data, loaded]);
+
+  useEffect(() => {
+    if (!loaded) return;
+    if (!data.trips.length) {
+      setSelectedTripId(null);
+      return;
+    }
+
+    if (selectedTripId && data.trips.some((trip) => trip.id === selectedTripId)) {
+      return;
+    }
+
+    const activeTripId = findActiveTripId(data.trips);
+    setSelectedTripId(activeTripId || data.trips[0].id);
+  }, [data.trips, selectedTripId, loaded]);
+
+  useEffect(() => {
+    if (tab !== 'checkup') return;
+    createFreshCheckupSession();
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [selectedTripId, selectedTripItems.length]);
+
+  function updateTripForm(field, value) {
+    setTripForm((prev) => ({ ...prev, [field]: value }));
+  }
+
+  function updateItemForm(field, value) {
+    setItemForm((prev) => ({ ...prev, [field]: value }));
+  }
+
+  async function pickImage(onPicked) {
+    const perm = await ImagePicker.requestMediaLibraryPermissionsAsync();
+    if (!perm.granted) {
+      Alert.alert('Permission needed', 'Allow gallery access to select images.');
+      return;
+    }
+
+    const result = await ImagePicker.launchImageLibraryAsync({
+      mediaTypes: ImagePicker.MediaTypeOptions.Images,
+      allowsEditing: false,
+      quality: 0.85,
+    });
+
+    if (!result.canceled && result.assets?.[0]?.uri) {
+      onPicked(result.assets[0].uri);
+    }
+  }
+
+  function createTrip() {
+    if (!tripForm.name.trim()) {
+      Alert.alert('Missing name', 'Trip name is required.');
+      return;
+    }
+
+    const start = parseYMD(tripForm.startDate);
+    const end = parseYMD(tripForm.endDate);
+
+    if (!start || !end) {
+      Alert.alert('Invalid dates', 'Use YYYY-MM-DD format.');
+      return;
+    }
+
+    if (start > end) {
+      Alert.alert('Invalid dates', 'Start date cannot be after end date.');
+      return;
+    }
+
+    const now = Date.now();
+    const tripId = makeId('trip');
+
+    setData((prev) => {
+      const next = {
+        ...prev,
+        trips: [
+          ...prev.trips,
+          {
+            id: tripId,
+            name: tripForm.name.trim(),
+            location: tripForm.location.trim(),
+            startDate: tripForm.startDate,
+            endDate: tripForm.endDate,
+            imageUri: tripForm.imageUri,
+            createdAt: now,
+            updatedAt: now,
+          },
+        ],
+        itemsByTrip: { ...prev.itemsByTrip, [tripId]: [] },
+        checkupsByTrip: { ...prev.checkupsByTrip, [tripId]: [] },
+      };
+
+      if (tripForm.copyDefaultTemplate && prev.defaultTemplateTripId) {
+        const templateItems = prev.itemsByTrip[prev.defaultTemplateTripId] || [];
+        next.itemsByTrip[tripId] = templateItems.map((item) => ({
+          ...item,
+          id: makeId('item'),
+          createdAt: now,
+          updatedAt: now,
+        }));
+      }
+
+      if (tripForm.setAsDefaultTemplate) {
+        next.defaultTemplateTripId = tripId;
+      }
+
+      return next;
+    });
+
+    setSelectedTripId(tripId);
+    setTripForm(emptyTripForm());
+  }
+
+  function setTripAsTemplate(tripId) {
+    setData((prev) => ({ ...prev, defaultTemplateTripId: tripId }));
+  }
+
+  function deleteTrip(tripId) {
+    Alert.alert('Delete trip?', 'Trip items and check-up history will also be deleted.', [
+      { text: 'Cancel', style: 'cancel' },
+      {
+        text: 'Delete',
+        style: 'destructive',
+        onPress: () => {
+          setData((prev) => {
+            const trips = prev.trips.filter((trip) => trip.id !== tripId);
+            const itemsByTrip = { ...prev.itemsByTrip };
+            const checkupsByTrip = { ...prev.checkupsByTrip };
+            delete itemsByTrip[tripId];
+            delete checkupsByTrip[tripId];
+
+            return {
+              ...prev,
+              trips,
+              itemsByTrip,
+              checkupsByTrip,
+              defaultTemplateTripId: prev.defaultTemplateTripId === tripId ? null : prev.defaultTemplateTripId,
+            };
+          });
+        },
+      },
+    ]);
+  }
+
+  function openAddItemModal() {
+    setItemForm(emptyItemForm());
+    setItemModalVisible(true);
+  }
+
+  function openEditItemModal(item) {
+    setItemForm({
+      id: item.id,
+      name: item.name || '',
+      description: item.description || '',
+      category: item.category || '',
+      status: item.status || 'unpacked',
+      placement: item.placement || 'suitcase',
+      lentTo: item.lentTo || '',
+      imageUri: item.imageUri || '',
+    });
+    setItemModalVisible(true);
+  }
+
+  function saveItemFromModal() {
+    if (!selectedTripId) {
+      Alert.alert('No trip selected', 'Please select or create a trip first.');
+      return;
+    }
+
+    if (!itemForm.name.trim()) {
+      Alert.alert('Missing name', 'Item name is required.');
+      return;
+    }
+
+    const now = Date.now();
+
+    setData((prev) => {
+      const items = prev.itemsByTrip[selectedTripId] || [];
+      const existingCreatedAt = items.find((item) => item.id === itemForm.id)?.createdAt || now;
+      const nextItem = {
+        id: itemForm.id || makeId('item'),
+        name: itemForm.name.trim(),
+        description: itemForm.description.trim(),
+        category: itemForm.category.trim(),
+        status: itemForm.status,
+        placement: itemForm.placement,
+        lentTo: itemForm.status === 'lent-to' ? itemForm.lentTo.trim() : '',
+        imageUri: itemForm.imageUri,
+        createdAt: existingCreatedAt,
+        updatedAt: now,
+      };
+
+      const nextItems = itemForm.id
+        ? items.map((item) => (item.id === itemForm.id ? nextItem : item))
+        : [...items, nextItem];
+
+      return {
+        ...prev,
+        itemsByTrip: {
+          ...prev.itemsByTrip,
+          [selectedTripId]: nextItems,
+        },
+      };
+    });
+
+    setItemModalVisible(false);
+    setItemForm(emptyItemForm());
+  }
+
+  function deleteItem(itemId) {
+    setData((prev) => {
+      const items = prev.itemsByTrip[selectedTripId] || [];
+      return {
+        ...prev,
+        itemsByTrip: {
+          ...prev.itemsByTrip,
+          [selectedTripId]: items.filter((item) => item.id !== itemId),
+        },
+      };
+    });
+  }
+
+  function createFreshCheckupSession() {
+    if (!selectedTripItems.length) {
+      setCheckupSession([]);
+      return;
+    }
+
+    const fresh = selectedTripItems.map((item) => ({
+      itemId: item.id,
+      name: item.name,
+      category: item.category,
+      current: {
+        status: item.status,
+        placement: item.placement,
+        lentTo: item.lentTo || '',
+      },
+      confirmed: false,
+    }));
+
+    setCheckupSession(fresh);
+  }
+
+  function answerCheckupYes(itemId) {
+    setCheckupSession((prev) => prev.map((entry) => (entry.itemId === itemId ? { ...entry, confirmed: true } : entry)));
+  }
+
+  function openFixModal(itemId) {
+    const entry = checkupSession.find((x) => x.itemId === itemId);
+    if (!entry) return;
+
+    setCheckupFixTargetId(itemId);
+    setCheckupFixForm({
+      status: entry.current.status || 'unpacked',
+      placement: entry.current.placement || 'suitcase',
+      lentTo: entry.current.lentTo || '',
+      updateMasterList: false,
+    });
+    setCheckupFixModalVisible(true);
+  }
+
+  function saveFixModal() {
+    if (!checkupFixTargetId) return;
+
+    const targetId = checkupFixTargetId;
+    const patch = {
+      status: checkupFixForm.status,
+      placement: checkupFixForm.placement,
+      lentTo: checkupFixForm.status === 'lent-to' ? checkupFixForm.lentTo.trim() : '',
+    };
+
+    setCheckupSession((prev) =>
+      prev.map((entry) =>
+        entry.itemId === targetId
+          ? {
+              ...entry,
+              current: patch,
+              confirmed: true,
+            }
+          : entry
+      )
+    );
+
+    if (checkupFixForm.updateMasterList && selectedTripId) {
+      setData((prev) => {
+        const items = prev.itemsByTrip[selectedTripId] || [];
+        return {
+          ...prev,
+          itemsByTrip: {
+            ...prev.itemsByTrip,
+            [selectedTripId]: items.map((item) =>
+              item.id === targetId
+                ? {
+                    ...item,
+                    status: patch.status,
+                    placement: patch.placement,
+                    lentTo: patch.lentTo,
+                    updatedAt: Date.now(),
+                  }
+                : item
+            ),
+          },
+        };
+      });
+    }
+
+    setCheckupFixModalVisible(false);
+    setCheckupFixTargetId(null);
+  }
+
+  function saveCheckup() {
+    if (!selectedTripId) {
+      Alert.alert('No trip selected', 'Please select a trip first.');
+      return;
+    }
+
+    if (!checkupSession.length) {
+      Alert.alert('No items', 'Add items before creating a check-up.');
+      return;
+    }
+
+    const pending = checkupSession.filter((entry) => !entry.confirmed).length;
+    if (pending > 0) {
+      Alert.alert('Incomplete', `Please confirm all items first (${pending} remaining).`);
+      return;
+    }
+
+    const snapshot = checkupSession.map((entry) => ({
+      itemId: entry.itemId,
+      name: entry.name,
+      category: entry.category,
+      status: entry.current.status,
+      placement: entry.current.placement,
+      lentTo: entry.current.status === 'lent-to' ? entry.current.lentTo : '',
+    }));
+
+    setData((prev) => {
+      const existing = prev.checkupsByTrip[selectedTripId] || [];
+      return {
+        ...prev,
+        checkupsByTrip: {
+          ...prev.checkupsByTrip,
+          [selectedTripId]: [
+            ...existing,
+            {
+              id: makeId('checkup'),
+              createdAt: Date.now(),
+              snapshot,
+            },
+          ],
+        },
+      };
+    });
+
+    Alert.alert('Saved', 'Check-up snapshot saved.');
+    createFreshCheckupSession();
+  }
+
+  function focusToEnd() {
+    setTimeout(() => {
+      scrollRef.current?.scrollToEnd?.({ animated: true });
+    }, 80);
+  }
+
+  if (!loaded) {
+    return (
+      <SafeAreaView style={styles.safe}>
+        <StatusBar style="light" />
+        <View style={styles.center}>
+          <Text style={styles.muted}>Loading local data...</Text>
+        </View>
+      </SafeAreaView>
+    );
+  }
+
+  return (
+    <SafeAreaView style={styles.safe}>
+      <StatusBar style="light" />
+
+      <KeyboardAvoidingView style={styles.flex} behavior={Platform.OS === 'ios' ? 'padding' : 'height'}>
+        <ScrollView
+          ref={scrollRef}
+          contentContainerStyle={styles.content}
+          keyboardShouldPersistTaps="handled"
+          showsVerticalScrollIndicator={false}
+        >
+          <TripPicker trips={data.trips} selectedTripId={selectedTripId} onChooseTrip={setSelectedTripId} />
+
+          {tab === 'trips' && (
+            <TripsTab
+              tripForm={tripForm}
+              updateTripForm={updateTripForm}
+              pickTripImage={() => pickImage((uri) => updateTripForm('imageUri', uri))}
+              templateTrip={templateTrip}
+              createTrip={createTrip}
+              trips={data.trips}
+              selectedTripId={selectedTripId}
+              chooseTrip={setSelectedTripId}
+              setTripAsTemplate={setTripAsTemplate}
+              deleteTrip={deleteTrip}
+              focusToEnd={focusToEnd}
+              defaultTemplateTripId={data.defaultTemplateTripId}
+            />
+          )}
+
+          {tab === 'items' && (
+            <ItemsTab
+              selectedTrip={selectedTrip}
+              selectedTripItems={selectedTripItems}
+              openAddItemModal={openAddItemModal}
+              openEditItemModal={openEditItemModal}
+              deleteItem={deleteItem}
+            />
+          )}
+
+          {tab === 'checkup' && (
+            <CheckupTab
+              checkupSession={checkupSession}
+              answerCheckupYes={answerCheckupYes}
+              openFixModal={openFixModal}
+              createFreshCheckupSession={createFreshCheckupSession}
+              saveCheckup={saveCheckup}
+            />
+          )}
+
+          {tab === 'history' && (
+            <HistoryTab
+              selectedTripCheckups={selectedTripCheckups}
+              selectedCheckupId={selectedCheckupId}
+              setSelectedCheckupId={setSelectedCheckupId}
+            />
+          )}
+        </ScrollView>
+      </KeyboardAvoidingView>
+
+      <BottomTab current={tab} onChange={setTab} />
+
+      <ItemModal
+        visible={itemModalVisible}
+        itemForm={itemForm}
+        setItemModalVisible={setItemModalVisible}
+        updateItemForm={updateItemForm}
+        pickItemImage={() => pickImage((uri) => updateItemForm('imageUri', uri))}
+        saveItemFromModal={saveItemFromModal}
+      />
+
+      <CheckupFixModal
+        visible={checkupFixModalVisible}
+        checkupFixForm={checkupFixForm}
+        setCheckupFixForm={setCheckupFixForm}
+        setCheckupFixModalVisible={setCheckupFixModalVisible}
+        saveFixModal={saveFixModal}
+      />
+    </SafeAreaView>
+  );
+}

src/components/BottomTab.js

@@ -0,0 +1,28 @@
+import React from 'react';
+import { Pressable, Text, View } from 'react-native';
+import { styles } from '../styles';
+
+export default function BottomTab({ current, onChange }) {
+  const tabs = [
+    { key: 'trips', label: 'Trips' },
+    { key: 'items', label: 'Items' },
+    { key: 'checkup', label: 'Check-Up' },
+    { key: 'history', label: 'History' },
+  ];
+
+  return (
+    <View style={styles.tabBarWrap}>
+      <View style={styles.tabBar}>
+        {tabs.map((tab) => {
+          const active = current === tab.key;
+          return (
+            <Pressable key={tab.key} onPress={() => onChange(tab.key)} style={styles.tabItem}>
+              <View style={[styles.tabDot, active && styles.tabDotActive]} />
+              <Text style={[styles.tabLabel, active && styles.tabLabelActive]}>{tab.label}</Text>
+            </Pressable>
+          );
+        })}
+      </View>
+    </View>
+  );
+}

src/components/ChipGroup.js

@@ -0,0 +1,18 @@
+import React from 'react';
+import { Pressable, Text, View } from 'react-native';
+import { styles } from '../styles';
+
+export default function ChipGroup({ options, value, onChange }) {
+  return (
+    <View style={styles.chipGroup}>
+      {options.map((option) => {
+        const active = value === option;
+        return (
+          <Pressable key={option} style={[styles.chip, active && styles.chipActive]} onPress={() => onChange(option)}>
+            <Text style={[styles.chipText, active && styles.chipTextActive]}>{option}</Text>
+          </Pressable>
+        );
+      })}
+    </View>
+  );
+}

src/components/Field.js

@@ -0,0 +1,12 @@
+import React from 'react';
+import { Text, View } from 'react-native';
+import { styles } from '../styles';
+
+export default function Field({ label, children }) {
+  return (
+    <View style={styles.fieldWrap}>
+      <Text style={styles.label}>{label}</Text>
+      {children}
+    </View>
+  );
+}

src/components/ItemCard.js

@@ -0,0 +1,36 @@
+import React from 'react';
+import { Image, Pressable, Text, View } from 'react-native';
+import { STATUS_COLORS } from '../constants';
+import { styles } from '../styles';
+
+function statusAccent(status) {
+  return STATUS_COLORS[status] || '#64748b';
+}
+
+export default function ItemCard({ item, onEdit, onDelete }) {
+  return (
+    <View style={styles.itemCard}>
+      <View style={[styles.itemAccent, { backgroundColor: statusAccent(item.status) }]} />
+      <View style={styles.itemMain}>
+        <View style={styles.cardRow}>
+          <View style={styles.flex}>
+            <Text style={styles.itemTitle}>{item.name}</Text>
+            <Text style={styles.itemMeta}>{item.category || 'uncategorized'} · {item.status}</Text>
+            <Text style={styles.itemMeta}>Location: {item.placement}</Text>
+            {item.status === 'lent-to' && !!item.lentTo ? <Text style={styles.itemMeta}>Lent to: {item.lentTo}</Text> : null}
+            {!!item.description ? <Text style={styles.itemMeta}>{item.description}</Text> : null}
+          </View>
+          <View style={styles.stackButtons}>
+            <Pressable style={styles.miniBtn} onPress={() => onEdit(item)}>
+              <Text style={styles.miniBtnText}>Edit</Text>
+            </Pressable>
+            <Pressable style={styles.miniBtnDanger} onPress={() => onDelete(item.id)}>
+              <Text style={styles.miniBtnText}>Delete</Text>
+            </Pressable>
+          </View>
+        </View>
+        {item.imageUri ? <Image source={{ uri: item.imageUri }} style={styles.previewImageSmall} /> : null}
+      </View>
+    </View>
+  );
+}

src/components/TripPicker.js

@@ -0,0 +1,28 @@
+import React from 'react';
+import { Pressable, ScrollView, Text, View } from 'react-native';
+import { styles } from '../styles';
+
+export default function TripPicker({ trips, selectedTripId, onChooseTrip }) {
+  return (
+    <View style={styles.tripPickerWrap}>
+      <ScrollView horizontal showsHorizontalScrollIndicator={false} contentContainerStyle={styles.tripChipScroll}>
+        {trips.length ? (
+          trips
+            .slice()
+            .sort((a, b) => b.startDate.localeCompare(a.startDate))
+            .map((trip) => {
+              const active = selectedTripId === trip.id;
+              return (
+                <Pressable key={trip.id} style={[styles.tripChip, active && styles.tripChipActive]} onPress={() => onChooseTrip(trip.id)}>
+                  <Text style={[styles.tripChipText, active && styles.tripChipTextActive]}>{trip.name}</Text>
+                  <Text style={[styles.tripChipSub, active && styles.tripChipSubActive]}>{trip.startDate}</Text>
+                </Pressable>
+              );
+            })
+        ) : (
+          <Text style={styles.muted}>Create your first trip to start.</Text>
+        )}
+      </ScrollView>
+    </View>
+  );
+}

src/constants.js

@@ -0,0 +1,20 @@
+export const STORAGE_KEY = 'luggage-list:v2';
+export const TAB_BAR_HEIGHT = 72;
+
+export const ITEM_STATUSES = ['packed', 'unpacked', 'lost', 'left-behind', 'lent-to'];
+export const ITEM_PLACEMENTS = ['suitcase', 'backpack', 'with-user', 'other'];
+
+export const STATUS_COLORS = {
+  packed: '#22c55e',
+  unpacked: '#64748b',
+  lost: '#ef4444',
+  'left-behind': '#f59e0b',
+  'lent-to': '#8b5cf6',
+};
+
+export const emptyData = {
+  trips: [],
+  itemsByTrip: {},
+  checkupsByTrip: {},
+  defaultTemplateTripId: null,
+};

src/modals/CheckupFixModal.js

@@ -0,0 +1,74 @@
+import React from 'react';
+import { KeyboardAvoidingView, Modal, Platform, Pressable, ScrollView, Text, TextInput, View } from 'react-native';
+import { ITEM_PLACEMENTS, ITEM_STATUSES } from '../constants';
+import ChipGroup from '../components/ChipGroup';
+import Field from '../components/Field';
+import { styles } from '../styles';
+
+export default function CheckupFixModal({
+  visible,
+  checkupFixForm,
+  setCheckupFixForm,
+  setCheckupFixModalVisible,
+  saveFixModal,
+}) {
+  return (
+    <Modal visible={visible} animationType="slide" transparent>
+      <View style={styles.modalBackdrop}>
+        <KeyboardAvoidingView behavior={Platform.OS === 'ios' ? 'padding' : 'height'} style={styles.modalKeyboardWrap}>
+          <View style={styles.modalCard}>
+            <View style={styles.sectionRow}>
+              <Text style={styles.sectionTitle}>Update for this Check-Up</Text>
+              <Pressable onPress={() => setCheckupFixModalVisible(false)}>
+                <Text style={styles.closeText}>Close</Text>
+              </Pressable>
+            </View>
+
+            <ScrollView keyboardShouldPersistTaps="handled" showsVerticalScrollIndicator={false}>
+              <Field label="Status">
+                <ChipGroup
+                  options={ITEM_STATUSES}
+                  value={checkupFixForm.status}
+                  onChange={(v) => setCheckupFixForm((prev) => ({ ...prev, status: v }))}
+                />
+              </Field>
+
+              <Field label="Placement">
+                <ChipGroup
+                  options={ITEM_PLACEMENTS}
+                  value={checkupFixForm.placement}
+                  onChange={(v) => setCheckupFixForm((prev) => ({ ...prev, placement: v }))}
+                />
+              </Field>
+
+              {checkupFixForm.status === 'lent-to' ? (
+                <Field label="Lent to">
+                  <TextInput
+                    style={styles.input}
+                    value={checkupFixForm.lentTo}
+                    onChangeText={(v) => setCheckupFixForm((prev) => ({ ...prev, lentTo: v }))}
+                    placeholder="Person name"
+                    placeholderTextColor="#6b7280"
+                  />
+                </Field>
+              ) : null}
+
+              <Pressable
+                style={styles.inlineToggle}
+                onPress={() => setCheckupFixForm((prev) => ({ ...prev, updateMasterList: !prev.updateMasterList }))}
+              >
+                <Text style={styles.inlineToggleText}>
+                  {checkupFixForm.updateMasterList ? '☑' : '☐'} Also update item in trip list
+                </Text>
+              </Pressable>
+
+              <Pressable style={styles.primaryBtn} onPress={saveFixModal}>
+                <Text style={styles.primaryBtnText}>Save</Text>
+              </Pressable>
+            </ScrollView>
+          </View>
+        </KeyboardAvoidingView>
+      </View>
+    </Modal>
+  );
+}

src/modals/ItemModal.js

@@ -0,0 +1,93 @@
+import React from 'react';
+import { Image, KeyboardAvoidingView, Modal, Platform, Pressable, ScrollView, Text, TextInput, View } from 'react-native';
+import { ITEM_PLACEMENTS, ITEM_STATUSES } from '../constants';
+import ChipGroup from '../components/ChipGroup';
+import Field from '../components/Field';
+import { styles } from '../styles';
+
+export default function ItemModal({
+  visible,
+  itemForm,
+  setItemModalVisible,
+  updateItemForm,
+  pickItemImage,
+  saveItemFromModal,
+}) {
+  return (
+    <Modal visible={visible} animationType="slide" transparent>
+      <View style={styles.modalBackdrop}>
+        <KeyboardAvoidingView behavior={Platform.OS === 'ios' ? 'padding' : 'height'} style={styles.modalKeyboardWrap}>
+          <View style={styles.modalCard}>
+            <View style={styles.sectionRow}>
+              <Text style={styles.sectionTitle}>{itemForm.id ? 'Update Item' : 'Add Item'}</Text>
+              <Pressable onPress={() => setItemModalVisible(false)}>
+                <Text style={styles.closeText}>Close</Text>
+              </Pressable>
+            </View>
+
+            <ScrollView keyboardShouldPersistTaps="handled" showsVerticalScrollIndicator={false}>
+              <Field label="Name">
+                <TextInput
+                  style={styles.input}
+                  value={itemForm.name}
+                  onChangeText={(v) => updateItemForm('name', v)}
+                  placeholder="Toothbrush"
+                  placeholderTextColor="#6b7280"
+                />
+              </Field>
+
+              <Field label="Description">
+                <TextInput
+                  style={styles.input}
+                  value={itemForm.description}
+                  onChangeText={(v) => updateItemForm('description', v)}
+                  placeholder="Optional"
+                  placeholderTextColor="#6b7280"
+                />
+              </Field>
+
+              <Field label="Category">
+                <TextInput
+                  style={styles.input}
+                  value={itemForm.category}
+                  onChangeText={(v) => updateItemForm('category', v)}
+                  placeholder="toiletries"
+                  placeholderTextColor="#6b7280"
+                />
+              </Field>
+
+              <Field label="Status">
+                <ChipGroup options={ITEM_STATUSES} value={itemForm.status} onChange={(v) => updateItemForm('status', v)} />
+              </Field>
+
+              <Field label="Placement">
+                <ChipGroup options={ITEM_PLACEMENTS} value={itemForm.placement} onChange={(v) => updateItemForm('placement', v)} />
+              </Field>
+
+              {itemForm.status === 'lent-to' ? (
+                <Field label="Lent to">
+                  <TextInput
+                    style={styles.input}
+                    value={itemForm.lentTo}
+                    onChangeText={(v) => updateItemForm('lentTo', v)}
+                    placeholder="Person name"
+                    placeholderTextColor="#6b7280"
+                  />
+                </Field>
+              ) : null}
+
+              <Pressable style={styles.secondaryBtn} onPress={pickItemImage}>
+                <Text style={styles.secondaryBtnText}>{itemForm.imageUri ? 'Change image' : 'Add image'}</Text>
+              </Pressable>
+              {!!itemForm.imageUri && <Image source={{ uri: itemForm.imageUri }} style={styles.previewImageSmall} />}
+
+              <Pressable style={styles.primaryBtn} onPress={saveItemFromModal}>
+                <Text style={styles.primaryBtnText}>{itemForm.id ? 'Save Changes' : 'Add Item'}</Text>
+              </Pressable>
+            </ScrollView>
+          </View>
+        </KeyboardAvoidingView>
+      </View>
+    </Modal>
+  );
+}

src/styles.js

@@ -0,0 +1,376 @@
+import { Platform, StyleSheet } from 'react-native';
+import { TAB_BAR_HEIGHT } from './constants';
+
+export const styles = StyleSheet.create({
+  safe: {
+    flex: 1,
+    backgroundColor: '#090d12',
+  },
+  flex: {
+    flex: 1,
+  },
+  content: {
+    paddingHorizontal: 14,
+    paddingTop: 12,
+    paddingBottom: TAB_BAR_HEIGHT + 18,
+    gap: 12,
+  },
+  center: {
+    flex: 1,
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  muted: {
+    color: '#8793a5',
+  },
+
+  tripPickerWrap: {
+    marginBottom: 6,
+  },
+  tripChipScroll: {
+    gap: 8,
+    paddingRight: 12,
+  },
+  tripChip: {
+    paddingHorizontal: 12,
+    paddingVertical: 9,
+    borderRadius: 12,
+    backgroundColor: '#121923',
+    borderWidth: 1,
+    borderColor: '#1f2937',
+    minWidth: 120,
+  },
+  tripChipActive: {
+    backgroundColor: '#1d2a3a',
+    borderColor: '#60a5fa',
+  },
+  tripChipText: {
+    color: '#e2e8f0',
+    fontWeight: '700',
+  },
+  tripChipTextActive: {
+    color: '#bfdbfe',
+  },
+  tripChipSub: {
+    color: '#64748b',
+    fontSize: 12,
+    marginTop: 2,
+  },
+  tripChipSubActive: {
+    color: '#93c5fd',
+  },
+
+  section: {
+    gap: 10,
+  },
+  sectionTitle: {
+    color: '#f1f5f9',
+    fontSize: 18,
+    fontWeight: '700',
+  },
+  sectionRow: {
+    flexDirection: 'row',
+    justifyContent: 'space-between',
+    alignItems: 'center',
+    gap: 10,
+  },
+
+  card: {
+    backgroundColor: '#111827',
+    borderRadius: 14,
+    borderWidth: 1,
+    borderColor: '#1f2937',
+    padding: 12,
+    gap: 8,
+  },
+  cardActive: {
+    borderColor: '#60a5fa',
+  },
+  cardSoft: {
+    backgroundColor: '#0f172a',
+    borderRadius: 14,
+    borderWidth: 1,
+    borderColor: '#1e293b',
+    padding: 12,
+    gap: 10,
+  },
+  cardRow: {
+    flexDirection: 'row',
+    gap: 10,
+  },
+  cardTitle: {
+    color: '#f8fafc',
+    fontWeight: '700',
+    fontSize: 15,
+  },
+  cardMeta: {
+    color: '#94a3b8',
+    marginTop: 3,
+    fontSize: 13,
+  },
+
+  fieldWrap: {
+    gap: 6,
+  },
+  label: {
+    color: '#cbd5e1',
+    fontWeight: '600',
+  },
+  input: {
+    borderWidth: 1,
+    borderColor: '#243244',
+    borderRadius: 10,
+    backgroundColor: '#0b1220',
+    color: '#e5e7eb',
+    paddingHorizontal: 10,
+    paddingVertical: 11,
+  },
+
+  chipGroup: {
+    flexDirection: 'row',
+    flexWrap: 'wrap',
+    gap: 7,
+  },
+  chip: {
+    borderRadius: 999,
+    paddingHorizontal: 11,
+    paddingVertical: 7,
+    borderWidth: 1,
+    borderColor: '#273449',
+    backgroundColor: '#0b1220',
+  },
+  chipActive: {
+    borderColor: '#60a5fa',
+    backgroundColor: '#172338',
+  },
+  chipText: {
+    color: '#cbd5e1',
+    fontWeight: '600',
+    fontSize: 12,
+  },
+  chipTextActive: {
+    color: '#bfdbfe',
+  },
+
+  primaryBtn: {
+    marginTop: 4,
+    borderRadius: 10,
+    backgroundColor: '#2563eb',
+    alignItems: 'center',
+    paddingVertical: 11,
+    paddingHorizontal: 12,
+  },
+  primaryBtnTight: {
+    borderRadius: 10,
+    backgroundColor: '#2563eb',
+    alignItems: 'center',
+    paddingVertical: 8,
+    paddingHorizontal: 12,
+  },
+  primaryBtnText: {
+    color: '#fff',
+    fontWeight: '700',
+  },
+  secondaryBtn: {
+    marginTop: 4,
+    borderRadius: 10,
+    backgroundColor: '#1f2937',
+    alignItems: 'center',
+    paddingVertical: 11,
+    paddingHorizontal: 12,
+  },
+  secondaryBtnTight: {
+    borderRadius: 10,
+    backgroundColor: '#1f2937',
+    alignItems: 'center',
+    paddingVertical: 8,
+    paddingHorizontal: 12,
+  },
+  secondaryBtnText: {
+    color: '#dbeafe',
+    fontWeight: '700',
+  },
+
+  inlineToggle: {
+    marginTop: 2,
+  },
+  inlineToggleText: {
+    color: '#cbd5e1',
+  },
+
+  stackButtons: {
+    gap: 7,
+  },
+  miniBtn: {
+    backgroundColor: '#1e293b',
+    borderRadius: 8,
+    paddingVertical: 7,
+    paddingHorizontal: 10,
+  },
+  miniBtnDanger: {
+    backgroundColor: '#3b1d22',
+    borderRadius: 8,
+    paddingVertical: 7,
+    paddingHorizontal: 10,
+  },
+  miniBtnText: {
+    color: '#e2e8f0',
+    fontWeight: '700',
+    fontSize: 12,
+  },
+
+  itemCard: {
+    borderRadius: 14,
+    backgroundColor: '#111827',
+    borderWidth: 1,
+    borderColor: '#1f2937',
+    overflow: 'hidden',
+    flexDirection: 'row',
+  },
+  itemAccent: {
+    width: 5,
+  },
+  itemMain: {
+    flex: 1,
+    padding: 12,
+    gap: 8,
+  },
+  itemTitle: {
+    color: '#f8fafc',
+    fontWeight: '700',
+    fontSize: 15,
+  },
+  itemMeta: {
+    color: '#94a3b8',
+    marginTop: 2,
+    fontSize: 13,
+  },
+
+  answerRow: {
+    marginTop: 8,
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: 8,
+  },
+  answerYes: {
+    backgroundColor: '#163223',
+    borderWidth: 1,
+    borderColor: '#1f7a4e',
+    borderRadius: 9,
+    paddingHorizontal: 16,
+    paddingVertical: 8,
+  },
+  answerNo: {
+    backgroundColor: '#3b1d22',
+    borderWidth: 1,
+    borderColor: '#7f1d1d',
+    borderRadius: 9,
+    paddingHorizontal: 16,
+    paddingVertical: 8,
+  },
+  answerText: {
+    color: '#f8fafc',
+    fontWeight: '700',
+  },
+  answerStateDot: {
+    width: 10,
+    height: 10,
+    borderRadius: 99,
+    backgroundColor: '#475569',
+  },
+  answerStateDotOn: {
+    backgroundColor: '#22c55e',
+  },
+
+  snapshotWrap: {
+    marginTop: 8,
+    borderTopWidth: 1,
+    borderTopColor: '#1e293b',
+    paddingTop: 8,
+    gap: 7,
+  },
+  snapshotRow: {
+    paddingVertical: 3,
+  },
+  snapshotTitle: {
+    color: '#e2e8f0',
+    fontWeight: '600',
+  },
+
+  previewImage: {
+    width: '100%',
+    height: 150,
+    borderRadius: 10,
+    backgroundColor: '#111827',
+  },
+  previewImageSmall: {
+    width: '100%',
+    height: 120,
+    borderRadius: 10,
+    backgroundColor: '#111827',
+  },
+
+  tabBarWrap: {
+    position: 'absolute',
+    bottom: 0,
+    left: 0,
+    right: 0,
+    paddingHorizontal: 10,
+    paddingBottom: Platform.OS === 'ios' ? 14 : 8,
+    backgroundColor: 'transparent',
+  },
+  tabBar: {
+    height: TAB_BAR_HEIGHT,
+    borderRadius: 16,
+    backgroundColor: '#0b1220',
+    borderWidth: 1,
+    borderColor: '#1f2937',
+    flexDirection: 'row',
+    alignItems: 'center',
+    justifyContent: 'space-around',
+  },
+  tabItem: {
+    alignItems: 'center',
+    gap: 4,
+  },
+  tabDot: {
+    width: 6,
+    height: 6,
+    borderRadius: 99,
+    backgroundColor: '#334155',
+  },
+  tabDotActive: {
+    backgroundColor: '#60a5fa',
+  },
+  tabLabel: {
+    color: '#94a3b8',
+    fontSize: 12,
+    fontWeight: '600',
+  },
+  tabLabelActive: {
+    color: '#dbeafe',
+  },
+
+  modalBackdrop: {
+    flex: 1,
+    backgroundColor: 'rgba(2,6,23,0.72)',
+    justifyContent: 'flex-end',
+  },
+  modalKeyboardWrap: {
+    width: '100%',
+  },
+  modalCard: {
+    maxHeight: '87%',
+    backgroundColor: '#0f172a',
+    borderTopLeftRadius: 18,
+    borderTopRightRadius: 18,
+    borderWidth: 1,
+    borderColor: '#1e293b',
+    padding: 14,
+    gap: 8,
+  },
+  closeText: {
+    color: '#93c5fd',
+    fontWeight: '700',
+  },
+});

src/tabs/CheckupTab.js

@@ -0,0 +1,45 @@
+import React from 'react';
+import { Pressable, Text, View } from 'react-native';
+import { styles } from '../styles';
+
+export default function CheckupTab({ checkupSession, answerCheckupYes, openFixModal, createFreshCheckupSession, saveCheckup }) {
+  return (
+    <View style={styles.section}>
+      <View style={styles.sectionRow}>
+        <Text style={styles.sectionTitle}>Check-Up</Text>
+        <Pressable style={styles.secondaryBtnTight} onPress={createFreshCheckupSession}>
+          <Text style={styles.secondaryBtnText}>Restart</Text>
+        </Pressable>
+      </View>
+
+      {checkupSession.length === 0 ? <Text style={styles.muted}>No items for this trip yet.</Text> : null}
+
+      {checkupSession.map((entry) => (
+        <View key={entry.itemId} style={styles.cardSoft}>
+          <Text style={styles.cardTitle}>{entry.name}</Text>
+          <Text style={styles.cardMeta}>{entry.category || 'uncategorized'}</Text>
+          <Text style={styles.cardMeta}>
+            {entry.current.status} · {entry.current.placement}
+            {entry.current.status === 'lent-to' && entry.current.lentTo ? ` · ${entry.current.lentTo}` : ''}
+          </Text>
+
+          <View style={styles.answerRow}>
+            <Pressable style={styles.answerYes} onPress={() => answerCheckupYes(entry.itemId)}>
+              <Text style={styles.answerText}>Yes</Text>
+            </Pressable>
+            <Pressable style={styles.answerNo} onPress={() => openFixModal(entry.itemId)}>
+              <Text style={styles.answerText}>No</Text>
+            </Pressable>
+            <View style={[styles.answerStateDot, entry.confirmed ? styles.answerStateDotOn : null]} />
+          </View>
+        </View>
+      ))}
+
+      {!!checkupSession.length && (
+        <Pressable style={styles.primaryBtn} onPress={saveCheckup}>
+          <Text style={styles.primaryBtnText}>Save Check-Up Snapshot</Text>
+        </Pressable>
+      )}
+    </View>
+  );
+}

src/tabs/HistoryTab.js

@@ -0,0 +1,36 @@
+import React from 'react';
+import { Pressable, Text, View } from 'react-native';
+import { styles } from '../styles';
+
+export default function HistoryTab({ selectedTripCheckups, selectedCheckupId, setSelectedCheckupId }) {
+  return (
+    <View style={styles.section}>
+      <Text style={styles.sectionTitle}>History</Text>
+      {selectedTripCheckups.length === 0 ? <Text style={styles.muted}>No check-ups saved yet.</Text> : null}
+
+      {selectedTripCheckups.map((checkup) => (
+        <View key={checkup.id} style={styles.cardSoft}>
+          <Pressable onPress={() => setSelectedCheckupId((prev) => (prev === checkup.id ? null : checkup.id))}>
+            <Text style={styles.cardTitle}>{new Date(checkup.createdAt).toLocaleString()}</Text>
+            <Text style={styles.cardMeta}>{checkup.snapshot.length} items</Text>
+            <Text style={styles.cardMeta}>{selectedCheckupId === checkup.id ? 'Tap to collapse' : 'Tap to open'}</Text>
+          </Pressable>
+
+          {selectedCheckupId === checkup.id ? (
+            <View style={styles.snapshotWrap}>
+              {checkup.snapshot.map((entry) => (
+                <View key={entry.itemId} style={styles.snapshotRow}>
+                  <Text style={styles.snapshotTitle}>{entry.name}</Text>
+                  <Text style={styles.cardMeta}>
+                    {entry.status} · {entry.placement}
+                    {entry.status === 'lent-to' && entry.lentTo ? ` · ${entry.lentTo}` : ''}
+                  </Text>
+                </View>
+              ))}
+            </View>
+          ) : null}
+        </View>
+      ))}
+    </View>
+  );
+}

src/tabs/ItemsTab.js

@@ -0,0 +1,24 @@
+import React from 'react';
+import { Pressable, Text, View } from 'react-native';
+import ItemCard from '../components/ItemCard';
+import { styles } from '../styles';
+
+export default function ItemsTab({ selectedTrip, selectedTripItems, openAddItemModal, openEditItemModal, deleteItem }) {
+  return (
+    <View style={styles.section}>
+      <View style={styles.sectionRow}>
+        <Text style={styles.sectionTitle}>Luggage Items</Text>
+        <Pressable style={styles.primaryBtnTight} onPress={openAddItemModal}>
+          <Text style={styles.primaryBtnText}>+ Add</Text>
+        </Pressable>
+      </View>
+
+      {!selectedTrip ? <Text style={styles.muted}>Select a trip first.</Text> : null}
+      {selectedTripItems.length === 0 && selectedTrip ? <Text style={styles.muted}>No items yet.</Text> : null}
+
+      {selectedTripItems.map((item) => (
+        <ItemCard key={item.id} item={item} onEdit={openEditItemModal} onDelete={deleteItem} />
+      ))}
+    </View>
+  );
+}

src/tabs/TripsTab.js

@@ -0,0 +1,118 @@
+import React from 'react';
+import { Image, Pressable, Text, TextInput, View } from 'react-native';
+import Field from '../components/Field';
+import { styles } from '../styles';
+
+export default function TripsTab({
+  tripForm,
+  updateTripForm,
+  pickTripImage,
+  templateTrip,
+  createTrip,
+  trips,
+  selectedTripId,
+  chooseTrip,
+  setTripAsTemplate,
+  deleteTrip,
+  focusToEnd,
+  defaultTemplateTripId,
+}) {
+  return (
+    <View style={styles.section}>
+      <Text style={styles.sectionTitle}>Trips</Text>
+
+      <View style={styles.cardSoft}>
+        <Field label="Name">
+          <TextInput
+            style={styles.input}
+            value={tripForm.name}
+            onChangeText={(v) => updateTripForm('name', v)}
+            placeholder="Summer Weekend"
+            placeholderTextColor="#6b7280"
+            onFocus={focusToEnd}
+          />
+        </Field>
+
+        <Field label="Location">
+          <TextInput
+            style={styles.input}
+            value={tripForm.location}
+            onChangeText={(v) => updateTripForm('location', v)}
+            placeholder="Berlin"
+            placeholderTextColor="#6b7280"
+            onFocus={focusToEnd}
+          />
+        </Field>
+
+        <Field label="Start Date (YYYY-MM-DD)">
+          <TextInput
+            style={styles.input}
+            value={tripForm.startDate}
+            onChangeText={(v) => updateTripForm('startDate', v)}
+            placeholderTextColor="#6b7280"
+            onFocus={focusToEnd}
+          />
+        </Field>
+
+        <Field label="End Date (YYYY-MM-DD)">
+          <TextInput
+            style={styles.input}
+            value={tripForm.endDate}
+            onChangeText={(v) => updateTripForm('endDate', v)}
+            placeholderTextColor="#6b7280"
+            onFocus={focusToEnd}
+          />
+        </Field>
+
+        <Pressable style={styles.secondaryBtn} onPress={pickTripImage}>
+          <Text style={styles.secondaryBtnText}>{tripForm.imageUri ? 'Change trip image' : 'Add trip image'}</Text>
+        </Pressable>
+
+        {tripForm.imageUri ? <Image source={{ uri: tripForm.imageUri }} style={styles.previewImage} /> : null}
+
+        {templateTrip ? (
+          <Pressable style={styles.inlineToggle} onPress={() => updateTripForm('copyDefaultTemplate', !tripForm.copyDefaultTemplate)}>
+            <Text style={styles.inlineToggleText}>
+              {tripForm.copyDefaultTemplate ? '☑' : '☐'} Copy items from template ({templateTrip.name})
+            </Text>
+          </Pressable>
+        ) : null}
+
+        <Pressable style={styles.inlineToggle} onPress={() => updateTripForm('setAsDefaultTemplate', !tripForm.setAsDefaultTemplate)}>
+          <Text style={styles.inlineToggleText}>{tripForm.setAsDefaultTemplate ? '☑' : '☐'} Set as default template</Text>
+        </Pressable>
+
+        <Pressable style={styles.primaryBtn} onPress={createTrip}>
+          <Text style={styles.primaryBtnText}>Create Trip</Text>
+        </Pressable>
+      </View>
+
+      {trips
+        .slice()
+        .sort((a, b) => b.startDate.localeCompare(a.startDate))
+        .map((trip) => (
+          <View key={trip.id} style={[styles.card, selectedTripId === trip.id && styles.cardActive]}>
+            <View style={styles.cardRow}>
+              <View style={styles.flex}>
+                <Text style={styles.cardTitle}>{trip.name}</Text>
+                <Text style={styles.cardMeta}>{trip.location || 'No location'} · {trip.startDate} → {trip.endDate}</Text>
+                <Text style={styles.cardMeta}>{defaultTemplateTripId === trip.id ? 'Default template' : ' '}</Text>
+              </View>
+              <View style={styles.stackButtons}>
+                <Pressable style={styles.miniBtn} onPress={() => chooseTrip(trip.id)}>
+                  <Text style={styles.miniBtnText}>Select</Text>
+                </Pressable>
+                <Pressable style={styles.miniBtn} onPress={() => setTripAsTemplate(trip.id)}>
+                  <Text style={styles.miniBtnText}>Template</Text>
+                </Pressable>
+                <Pressable style={styles.miniBtnDanger} onPress={() => deleteTrip(trip.id)}>
+                  <Text style={styles.miniBtnText}>Delete</Text>
+                </Pressable>
+              </View>
+            </View>
+            {trip.imageUri ? <Image source={{ uri: trip.imageUri }} style={styles.previewImageSmall} /> : null}
+          </View>
+        ))}
+    </View>
+  );
+}

src/utils/date.js

@@ -0,0 +1,25 @@
+export function makeId(prefix) {
+  return `${prefix}_${Date.now()}_${Math.random().toString(36).slice(2, 8)}`;
+}
+
+export function todayYMD() {
+  const now = new Date();
+  return `${now.getFullYear()}-${`${now.getMonth() + 1}`.padStart(2, '0')}-${`${now.getDate()}`.padStart(2, '0')}`;
+}
+
+export function parseYMD(value) {
+  if (!value || !/^\d{4}-\d{2}-\d{2}$/.test(value)) return null;
+  const d = new Date(`${value}T00:00:00`);
+  return Number.isNaN(d.getTime()) ? null : d;
+}
+
+export function findActiveTripId(trips) {
+  const today = parseYMD(todayYMD());
+  if (!today) return null;
+  const active = trips.find((trip) => {
+    const start = parseYMD(trip.startDate);
+    const end = parseYMD(trip.endDate);
+    return !!start && !!end && today >= start && today <= end;
+  });
+  return active?.id || null;
+}