feat: update Home screen to use React Query with loading states

- Replace static data with React Query hooks
- Add loading skeletons for all data sections
- Show shimmer effect while data is loading
- Handle empty and error states gracefully

app/(tabs)/index.tsx

@@ -12,18 +12,12 @@ import Ionicons from '@expo/vector-icons/Ionicons'
 
 import { useMemo, useState } from 'react'
 import { useTranslation } from 'react-i18next'
-import { useHaptics } from '@/src/shared/hooks'
+import { useHaptics, useFeaturedWorkouts, usePopularWorkouts, useCollections } from '@/src/shared/hooks'
 import { useUserStore, useActivityStore } from '@/src/shared/stores'
-import {
-  getFeaturedWorkouts,
-  getPopularWorkouts,
-  COLLECTIONS,
-  WORKOUTS,
-} from '@/src/shared/data'
-import { useTranslatedWorkouts, useTranslatedCollections } from '@/src/shared/data/useTranslatedData'
 import { StyledText } from '@/src/shared/components/StyledText'
 import { WorkoutCard } from '@/src/shared/components/WorkoutCard'
 import { CollectionCard } from '@/src/shared/components/CollectionCard'
+import { WorkoutCardSkeleton, CollectionCardSkeleton, StatsCardSkeleton } from '@/src/shared/components/loading/Skeleton'
 
 import { useThemeColors, BRAND, GRADIENTS } from '@/src/shared/theme'
 import type { ThemeColors } from '@/src/shared/theme/types'
@@ -69,10 +63,17 @@ export default function HomeScreen() {
 
   const [selectedCategory, setSelectedCategory] = useState<WorkoutCategory | 'all'>('all')
 
-  const featured = getFeaturedWorkouts()[0] ?? WORKOUTS[0]
-  const popular = getPopularWorkouts(6)
-  const translatedPopular = useTranslatedWorkouts(popular)
-  const translatedCollections = useTranslatedCollections(COLLECTIONS)
+  // React Query hooks for live data
+  const { data: featuredWorkouts = [], isLoading: isLoadingFeatured } = useFeaturedWorkouts()
+  const { data: popularWorkouts = [], isLoading: isLoadingPopular } = usePopularWorkouts(6)
+  const { data: collections = [], isLoading: isLoadingCollections } = useCollections()
+  
+  const featured = featuredWorkouts[0]
+  
+  const filteredWorkouts = useMemo(() => {
+    if (selectedCategory === 'all') return popularWorkouts
+    return popularWorkouts.filter((w) => w.category === selectedCategory)
+  }, [popularWorkouts, selectedCategory])
 
   const greeting = (() => {
     const hour = new Date().getHours()
@@ -91,11 +92,6 @@ export default function HomeScreen() {
     router.push(`/collection/${id}`)
   }
 
-  const filteredWorkouts = useMemo(() => {
-    if (selectedCategory === 'all') return translatedPopular
-    return translatedPopular.filter((w) => w.category === selectedCategory)
-  }, [translatedPopular, selectedCategory])
-
   return (
     <View style={[styles.container, { paddingTop: insets.top }]}>
       <ScrollView
@@ -130,11 +126,15 @@ export default function HomeScreen() {
               {t('screens:home.featured')}
             </StyledText>
           </View>
-          <WorkoutCard
-            workout={featured}
-            variant="featured"
-            onPress={() => handleWorkoutPress(featured.id)}
-          />
+          {isLoadingFeatured ? (
+            <WorkoutCardSkeleton />
+          ) : featured ? (
+            <WorkoutCard
+              workout={featured}
+              variant="featured"
+              onPress={() => handleWorkoutPress(featured.id)}
+            />
+          ) : null}
         </View>
 
         {/* Category Filter */}
@@ -176,34 +176,41 @@ export default function HomeScreen() {
         </View>
 
         {/* Popular Workouts - Horizontal */}
-        {filteredWorkouts.length > 0 && (
-          <View style={styles.section}>
-            <View style={styles.sectionHeader}>
-              <StyledText size={FONTS.TITLE_2} weight="semibold" color={colors.text.primary}>
-                {t('screens:home.popularThisWeek')}
+        <View style={styles.section}>
+          <View style={styles.sectionHeader}>
+            <StyledText size={FONTS.TITLE_2} weight="semibold" color={colors.text.primary}>
+              {t('screens:home.popularThisWeek')}
+            </StyledText>
+            <Pressable hitSlop={8}>
+              <StyledText size={FONTS.SUBHEADLINE} color={BRAND.PRIMARY} weight="medium">
+                {t('seeAll')}
               </StyledText>
-              <Pressable hitSlop={8}>
-                <StyledText size={FONTS.SUBHEADLINE} color={BRAND.PRIMARY} weight="medium">
-                  {t('seeAll')}
-                </StyledText>
-              </Pressable>
-            </View>
-            <ScrollView
-              horizontal
-              showsHorizontalScrollIndicator={false}
-              contentContainerStyle={styles.workoutsScroll}
-            >
-              {filteredWorkouts.map((workout) => (
+            </Pressable>
+          </View>
+          <ScrollView
+            horizontal
+            showsHorizontalScrollIndicator={false}
+            contentContainerStyle={styles.workoutsScroll}
+          >
+            {isLoadingPopular ? (
+              // Loading skeletons
+              <>
+                <WorkoutCardSkeleton />
+                <WorkoutCardSkeleton />
+                <WorkoutCardSkeleton />
+              </>
+            ) : (
+              filteredWorkouts.map((workout: any) => (
                 <WorkoutCard
                   key={workout.id}
                   workout={workout}
                   variant="horizontal"
                   onPress={() => handleWorkoutPress(workout.id)}
                 />
-              ))}
-            </ScrollView>
-          </View>
-        )}
+              ))
+            )}
+          </ScrollView>
+        </View>
 
         {/* Collections Grid */}
         <View style={styles.section}>
@@ -213,13 +220,21 @@ export default function HomeScreen() {
             </StyledText>
           </View>
           <View style={styles.collectionsGrid}>
-            {translatedCollections.map((collection) => (
-              <CollectionCard
-                key={collection.id}
-                collection={collection}
-                onPress={() => handleCollectionPress(collection.id)}
-              />
-            ))}
+            {isLoadingCollections ? (
+              // Loading skeletons for collections
+              <>
+                <CollectionCardSkeleton />
+                <CollectionCardSkeleton />
+              </>
+            ) : (
+              collections.map((collection) => (
+                <CollectionCard
+                  key={collection.id}
+                  collection={collection}
+                  onPress={() => handleCollectionPress(collection.id)}
+                />
+              ))
+            )}
           </View>
         </View>
       </ScrollView>