fix(store): replace ZStack overlay sticky approach with native pinnedViews + reliable scroll tracking

- Use LazyVStack(pinnedViews: [.sectionHeaders]) for native section header stickiness
- Move ScrollOffsetReader outside LazyVStack (sibling) to prevent lazy-unload breaking scroll tracking
- Add baseline capture to ScrollOffsetReader to correctly normalize offset regardless of ScrollView content insets
- Apply safeAreaTop padding to categoryTabs only when pinned (isCategoryTabsPinned), preventing oversized header before scroll
- Remove complex ZStack dual-tabs overlay, stickyProgress logic, and categoryTabsStickyProgress
- categoryTabs now accepts isPinned flag with easeInOut(0.15s) animation on pin transition

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pedi-foods/Sources/PediFoods/Views/Main/StoreDetailSupport.swift

@@ -22,6 +22,7 @@ struct ScrollOffsetPreferenceKey: PreferenceKey {
 
 struct ScrollOffsetReader: View {
     @Binding var offsetY: CGFloat
+    @State private var baseline: CGFloat? = nil
 
     var body: some View {
         Color.clear
@@ -35,9 +36,10 @@ struct ScrollOffsetReader: View {
                 }
             )
             .onPreferenceChange(ScrollOffsetPreferenceKey.self) { minY in
-                let normalizedOffset = max(0, -minY)
-                if abs(offsetY - normalizedOffset) > 0.5 {
-                    offsetY = normalizedOffset
+                if baseline == nil { baseline = minY }
+                let offset = max(0, (baseline ?? 0) - minY)
+                if abs(offsetY - offset) > 0.5 {
+                    offsetY = offset
                 }
             }
     }

pedi-foods/Sources/PediFoods/Views/Main/StoreDetailView+Components.swift

@@ -195,10 +195,15 @@ extension StoreDetailView {
         }
     }
 
-    func categoryTabs(proxy: ScrollViewProxy, topExtension: CGFloat = 0, stickyProgress: CGFloat = 0) -> some View {
-        let chipPaddingH: CGFloat = 10 + 6 * stickyProgress
-        let chipPaddingV: CGFloat = 4 + 5 * stickyProgress
-        let containerPaddingV: CGFloat = 2 + 8 * stickyProgress
+    func categoryTabs(proxy: ScrollViewProxy, isPinned: Bool = false) -> some View {
+        let safeTop: CGFloat = {
+            guard isPinned else { return 0 }
+            #if canImport(UIKit)
+            return UIDevice.appSafeAreaTop
+            #else
+            return 0
+            #endif
+        }()
 
         return ScrollView(.horizontal, showsIndicators: false) {
             HStack(spacing: 10) {
@@ -217,8 +222,8 @@ extension StoreDetailView {
                         Text(category.name)
                             .font(AppTypography.heading3)
                             .foregroundStyle(active ? AppColors.textInverse : AppColors.textMuted)
-                            .padding(.horizontal, chipPaddingH)
-                            .padding(.vertical, chipPaddingV)
+                            .padding(.horizontal, 16)
+                            .padding(.vertical, 9)
                             .background(active ? AppColors.primary : AppColors.surface)
                             .clipShape(Capsule())
                     }
@@ -226,16 +231,11 @@ extension StoreDetailView {
                 }
             }
             .padding(.horizontal, 16)
-            .padding(.vertical, containerPaddingV)
+            .padding(.vertical, 10)
         }
+        .padding(.top, safeTop)
         .background(AppColors.backgroundLight)
-        .overlay(alignment: .top) {
-            AppColors.backgroundLight
-                .frame(height: topExtension)
-                .frame(maxWidth: .infinity)
-                .offset(y: -topExtension)
-                .allowsHitTesting(false)
-        }
+        .animation(.easeInOut(duration: 0.15), value: isPinned)
     }
 
     func productCard(_ item: StoreCatalogListItem, in category: StoreCatalogCategory) -> some View {

pedi-foods/Sources/PediFoods/Views/Main/StoreDetailView+Logic.swift

@@ -51,8 +51,8 @@ extension StoreDetailView {
     }
 
     var deliveryValueLabel: String {
-        if let minOrder = info?.minOrder {
-            return formatCurrency(minOrder)
+        if let fee = storeDeliveryFee {
+            return formatCurrency(fee)
         }
         return "R$ --"
     }

pedi-foods/Sources/PediFoods/Views/Main/StoreDetailView.swift

@@ -34,15 +34,10 @@ struct StoreDetailView: View {
     @State var didLoad = false
     @State var categoryHeaderOffsets: [String: CGFloat] = [:]
     @State var isProgrammaticCategoryScroll = false
-    @State var scrollOffset: CGFloat = 0
-    var safeAreaTop: CGFloat {
-        #if canImport(UIKit)
-        return UIDevice.appSafeAreaTop
-        #else
-        return 0.0
-        #endif
-    }
     @State var isFavoriteRequestInFlight = false
+    @State var scrollOffset: CGFloat = 0
+
+    var isCategoryTabsPinned: Bool { scrollOffset >= topSectionHeight }
 
     let cardTopInset: CGFloat = 180
     let summaryCardBaseHeight: CGFloat = 212
@@ -52,48 +47,23 @@ struct StoreDetailView: View {
 
     var body: some View {
         ScrollViewReader { proxy in
-            let stickyProgress = categoryTabsStickyProgress(safeTop: safeAreaTop)
-
-            ZStack(alignment: .top) {
-                AppColors.backgroundLight.ignoresSafeArea()
-
             ScrollView(showsIndicators: false) {
-                    LazyVStack(spacing: 0) {
+                ScrollOffsetReader(offsetY: $scrollOffset)
+                LazyVStack(spacing: 0, pinnedViews: [.sectionHeaders]) {
                     topSection
                     Section {
                         sectionedProducts
                     } header: {
-                            categoryTabs(proxy: proxy, topExtension: 0, stickyProgress: 1)
-                                .opacity(Double(1 - stickyProgress))
+                        categoryTabs(proxy: proxy, isPinned: isCategoryTabsPinned)
                     }
                 }
-                    .background(
-                        GeometryReader { geometry in
-                            Color.clear.preference(
-                                key: ScrollOffsetPreferenceKey.self,
-                                value: geometry.frame(in: .named(StoreDetailScrollCoordinateSpace.name)).minY
-                            )
-                        }
-                    )
             }
             .coordinateSpace(name: StoreDetailScrollCoordinateSpace.name)
-                .onPreferenceChange(ScrollOffsetPreferenceKey.self) { minY in
-                    let normalizedOffset = max(0, -minY)
-                    if abs(scrollOffset - normalizedOffset) > 0.5 {
-                        scrollOffset = normalizedOffset
-                    }
-                }
             .refreshable {
                 await loadStoreData(forceRefresh: true)
             }
             .ignoresSafeArea(edges: .top)
-
-                categoryTabs(proxy: proxy, topExtension: stickyProgress * safeAreaTop, stickyProgress: 1)
-                    .opacity(Double(stickyProgress))
-                    .allowsHitTesting(stickyProgress > 0.1)
-                    .offset(y: safeAreaTop)
-            }
-            .ignoresSafeArea(edges: .top)
+            .background(AppColors.backgroundLight)
             .saturation(isStoreOpen ? 1 : 0)
         }
         .navigationBarBackButtonHidden(true)