feat(#1,#2,#5): add checkup nav/progress, image optimization controls, and raise tab bar

src/AppRoot.js

@@ -35,6 +35,8 @@ const emptyItemForm = () => ({
   placement: 'suitcase',
   lentTo: '',
   imageUri: '',
+  imageQuality: 'balanced',
+  imageAllowCrop: false,
 });
 
 const emptyCheckupNoForm = () => ({
@@ -234,7 +236,7 @@ export default function AppRoot() {
     setDatePicker((prev) => ({ ...prev, visible: false }));
   }
 
-  async function pickImage(onPicked) {
+  async function pickImage(onPicked, options = {}) {
     const perm = await ImagePicker.requestMediaLibraryPermissionsAsync();
     if (!perm.granted) {
       showAlert('Permission needed', 'Allow gallery access to select images.');
@@ -243,8 +245,8 @@ export default function AppRoot() {
 
     const result = await ImagePicker.launchImageLibraryAsync({
       mediaTypes: ImagePicker.MediaTypeOptions.Images,
-      allowsEditing: false,
-      quality: 0.85,
+      allowsEditing: !!options.allowCrop,
+      quality: typeof options.quality === 'number' ? options.quality : 0.85,
     });
 
     if (!result.canceled && result.assets?.[0]?.uri) {
@@ -252,7 +254,7 @@ export default function AppRoot() {
     }
   }
 
-  async function takeImage(onPicked) {
+  async function takeImage(onPicked, options = {}) {
     const perm = await ImagePicker.requestCameraPermissionsAsync();
     if (!perm.granted) {
       showAlert('Permission needed', 'Allow camera access to take photos.');
@@ -260,8 +262,8 @@ export default function AppRoot() {
     }
 
     const result = await ImagePicker.launchCameraAsync({
-      allowsEditing: false,
-      quality: 0.85,
+      allowsEditing: !!options.allowCrop,
+      quality: typeof options.quality === 'number' ? options.quality : 0.85,
     });
 
     if (!result.canceled && result.assets?.[0]?.uri) {
@@ -434,6 +436,8 @@ export default function AppRoot() {
       placement: item.placement || 'suitcase',
       lentTo: item.lentTo || '',
       imageUri: item.imageUri || '',
+      imageQuality: item.imageQuality || 'balanced',
+      imageAllowCrop: !!item.imageAllowCrop,
     });
     setItemModalVisible(true);
   }
@@ -463,6 +467,8 @@ export default function AppRoot() {
         placement: itemForm.placement,
         lentTo: itemForm.status === 'lent-to' ? itemForm.lentTo.trim() : '',
         imageUri: itemForm.imageUri,
+        imageQuality: itemForm.imageQuality,
+        imageAllowCrop: itemForm.imageAllowCrop,
         createdAt: existingCreatedAt,
         updatedAt: now,
       };
@@ -606,6 +612,28 @@ export default function AppRoot() {
     setCheckupNoForm(emptyCheckupNoForm());
   }
 
+  function goBackInCheckup() {
+    setCheckupFlowIndex((prev) => Math.max(0, prev - 1));
+    setCheckupFlowMode('question');
+    setCheckupNoForm(emptyCheckupNoForm());
+  }
+
+  function skipCurrentCheckupItem() {
+    if (!checkupCurrentEntry) return;
+    setCheckupSession((prev) =>
+      prev.map((x) =>
+        x.itemId === checkupCurrentEntry.itemId
+          ? {
+              ...x,
+              confirmed: false,
+              result: 'pending',
+            }
+          : x
+      )
+    );
+    goNextInCheckup();
+  }
+
   function answerCurrentCheckupYes() {
     const entry = checkupCurrentEntry;
     if (!entry) return;
@@ -855,8 +883,8 @@ export default function AppRoot() {
         itemForm={itemForm}
         setItemModalVisible={setItemModalVisible}
         updateItemForm={updateItemForm}
-        pickItemImage={() => pickImage((uri) => updateItemForm('imageUri', uri))}
-        takeItemImage={() => takeImage((uri) => updateItemForm('imageUri', uri))}
+        pickItemImage={(options) => pickImage((uri) => updateItemForm('imageUri', uri), options)}
+        takeItemImage={(options) => takeImage((uri) => updateItemForm('imageUri', uri), options)}
         saveItemFromModal={saveItemFromModal}
       />
 
@@ -872,6 +900,8 @@ export default function AppRoot() {
         onYes={answerCurrentCheckupYes}
         onNo={openCurrentCheckupNo}
         onSaveNo={saveCurrentCheckupNo}
+        onSkip={skipCurrentCheckupItem}
+        onBack={goBackInCheckup}
         onFinish={finishCheckupFlow}
       />
 

src/modals/CheckupFlowModal.js

@@ -17,6 +17,8 @@ export default function CheckupFlowModal({
   onYes,
   onNo,
   onSaveNo,
+  onSkip,
+  onBack,
   onFinish,
 }) {
   const finished = !entry;
@@ -37,9 +39,14 @@ export default function CheckupFlowModal({
               <View style={styles.section}>
                 <Text style={styles.cardTitle}>Done. Save this snapshot?</Text>
                 <Text style={styles.cardMeta}>All {total} items were checked.</Text>
-                <Pressable style={styles.primaryBtn} onPress={onFinish}>
-                  <Text style={styles.primaryBtnText}>Save Check-Up Snapshot</Text>
-                </Pressable>
+                <View style={styles.actionRow}>
+                  <Pressable style={[styles.secondaryBtnTight, styles.flex]} onPress={onBack}>
+                    <Text style={styles.secondaryBtnText}>Back</Text>
+                  </Pressable>
+                  <Pressable style={[styles.primaryBtnTight, styles.flex]} onPress={onFinish}>
+                    <Text style={styles.primaryBtnText}>Save Snapshot</Text>
+                  </Pressable>
+                </View>
               </View>
             ) : (
               <ScrollView
@@ -51,6 +58,9 @@ export default function CheckupFlowModal({
                 <Text style={styles.tripHistoryLabel}>
                   Item {stepIndex + 1} / {total}
                 </Text>
+                <View style={styles.checkupProgressTrack}>
+                  <View style={[styles.checkupProgressFill, { width: `${Math.round(((stepIndex + 1) / total) * 100)}%` }]} />
+                </View>
                 <Text style={styles.cardTitle}>{entry.name}</Text>
                 <Text style={styles.cardMeta}>{entry.category || 'uncategorized'}</Text>
                 <Text style={styles.cardMeta}>
@@ -60,6 +70,14 @@ export default function CheckupFlowModal({
 
                 {mode === 'question' ? (
                   <View style={styles.answerRowWide}>
+                    <View style={styles.actionRow}>
+                      <Pressable style={[styles.secondaryBtnTight, styles.flex]} onPress={onBack}>
+                        <Text style={styles.secondaryBtnText}>Back</Text>
+                      </Pressable>
+                      <Pressable style={[styles.secondaryBtnTight, styles.flex]} onPress={onSkip}>
+                        <Text style={styles.secondaryBtnText}>Skip</Text>
+                      </Pressable>
+                    </View>
                     <Pressable style={styles.answerYesWide} onPress={onYes}>
                       <Text style={styles.answerText}>Yes, correct</Text>
                     </Pressable>
@@ -106,9 +124,14 @@ export default function CheckupFlowModal({
                       </Text>
                     </Pressable>
 
-                    <Pressable style={styles.primaryBtn} onPress={onSaveNo}>
-                      <Text style={styles.primaryBtnText}>Save update + next</Text>
-                    </Pressable>
+                    <View style={styles.actionRow}>
+                      <Pressable style={[styles.secondaryBtnTight, styles.flex]} onPress={onBack}>
+                        <Text style={styles.secondaryBtnText}>Back</Text>
+                      </Pressable>
+                      <Pressable style={[styles.primaryBtnTight, styles.flex]} onPress={onSaveNo}>
+                        <Text style={styles.primaryBtnText}>Save + Next</Text>
+                      </Pressable>
+                    </View>
                   </View>
                 )}
               </ScrollView>

src/modals/ItemModal.js

@@ -5,6 +5,12 @@ import ChipGroup from '../components/ChipGroup';
 import Field from '../components/Field';
 import { styles } from '../styles';
 
+function qualityValue(level) {
+  if (level === 'high') return 0.95;
+  if (level === 'low') return 0.45;
+  return 0.75;
+}
+
 export default function ItemModal({
   visible,
   itemForm,
@@ -14,6 +20,11 @@ export default function ItemModal({
   takeItemImage,
   saveItemFromModal,
 }) {
+  const mediaOptions = {
+    quality: qualityValue(itemForm.imageQuality),
+    allowCrop: !!itemForm.imageAllowCrop,
+  };
+
   return (
     <Modal visible={visible} animationType="slide" transparent>
       <View style={styles.modalBackdrop}>
@@ -82,11 +93,28 @@ export default function ItemModal({
                 </Field>
               ) : null}
 
+              <Field label="Image optimization">
+                <View style={styles.chipGroup}>
+                  {['low', 'balanced', 'high'].map((level) => {
+                    const active = itemForm.imageQuality === level;
+                    return (
+                      <Pressable key={level} style={[styles.chip, active && styles.chipActive]} onPress={() => updateItemForm('imageQuality', level)}>
+                        <Text style={[styles.chipText, active && styles.chipTextActive]}>{level}</Text>
+                      </Pressable>
+                    );
+                  })}
+                </View>
+              </Field>
+
+              <Pressable style={styles.inlineToggle} onPress={() => updateItemForm('imageAllowCrop', !itemForm.imageAllowCrop)}>
+                <Text style={styles.inlineToggleText}>{itemForm.imageAllowCrop ? '☑' : '☐'} Enable optional crop before save</Text>
+              </Pressable>
+
               <View style={styles.actionRow}>
-                <Pressable style={[styles.secondaryBtnTight, styles.flex]} onPress={takeItemImage}>
+                <Pressable style={[styles.secondaryBtnTight, styles.flex]} onPress={() => takeItemImage(mediaOptions)}>
                   <Text style={styles.secondaryBtnText}>Take photo</Text>
                 </Pressable>
-                <Pressable style={[styles.secondaryBtnTight, styles.flex]} onPress={pickItemImage}>
+                <Pressable style={[styles.secondaryBtnTight, styles.flex]} onPress={() => pickItemImage(mediaOptions)}>
                   <Text style={styles.secondaryBtnText}>{itemForm.imageUri ? 'From gallery (change)' : 'From gallery'}</Text>
                 </Pressable>
               </View>

src/styles.js

@@ -404,6 +404,19 @@ export const styles = StyleSheet.create({
     marginTop: 14,
     gap: 10,
   },
+  checkupProgressTrack: {
+    width: '100%',
+    height: 8,
+    borderRadius: 999,
+    backgroundColor: '#1e293b',
+    overflow: 'hidden',
+    marginTop: 4,
+    marginBottom: 8,
+  },
+  checkupProgressFill: {
+    height: '100%',
+    backgroundColor: '#2563eb',
+  },
   answerYesWide: {
     backgroundColor: '#163223',
     borderWidth: 1,
@@ -494,7 +507,7 @@ export const styles = StyleSheet.create({
 
   tabBarWrap: {
     position: 'absolute',
-    bottom: 0,
+    bottom: 6,
     left: 0,
     right: 0,
     paddingHorizontal: 10,