Replace page TabView with paging ScrollView; fix diff + centering; bump to 3.2

The TabView with .page style broke NavigationLink inside tabs (the page
gesture swallows taps) and centered content. Replace with a horizontal paging
ScrollView using containerRelativeFrame and scrollTargetBehavior(.paging):
same swipe-to-change behavior, no gesture conflicts, diff view works again.
Bump to 3.2.

GiteaPR/Detail/PRDetailView.swift

@@ -103,19 +103,31 @@ struct PRDetailView: View {
         VStack(spacing: 0) {
             header(pr)
 
-            // Page-style TabView gives iOS-native swipe-to-change between
-            // sections (matching iOS 26), while the bottom bar taps select.
-            TabView(selection: $selectedTab) {
-                OverviewTab(pr: pr)
-                    .tag(DetailTab.overview)
-                ConversationTab(vm: vm)
-                    .tag(DetailTab.conversation)
-                FilesTab(vm: vm)
-                    .tag(DetailTab.files)
-                ChecksTab(vm: vm, onRerun: { showRerunConfirm = $0 })
-                    .tag(DetailTab.checks)
+            // Horizontal paging ScrollView — swipeable like a TabView, but
+            // without breaking NavigationLink inside the tabs (TabView's .page
+            // style swallows taps and interferes with nested navigation).
+            ScrollView(.horizontal, showsIndicators: false) {
+                HStack(spacing: 0) {
+                    OverviewTab(pr: pr)
+                        .id(DetailTab.overview)
+                        .containerRelativeFrame(.horizontal)
+
+                    ConversationTab(vm: vm)
+                        .id(DetailTab.conversation)
+                        .containerRelativeFrame(.horizontal)
+
+                    FilesTab(vm: vm)
+                        .id(DetailTab.files)
+                        .containerRelativeFrame(.horizontal)
+
+                    ChecksTab(vm: vm, onRerun: { showRerunConfirm = $0 })
+                        .id(DetailTab.checks)
+                        .containerRelativeFrame(.horizontal)
+                }
+                .scrollTargetLayout()
             }
-            .tabViewStyle(.page(indexDisplayMode: .never))
+            .scrollTargetBehavior(.paging)
+            .scrollPosition(id: $selectedTab)
             .ignoresSafeArea(edges: .bottom)
 
             bottomTabBar