Fix home account switch layout crash

suixinkan/UI/Home/HomeCollectionModels.swift

@@ -35,8 +35,8 @@ enum HomeCollectionLayoutBuilder {
     /// 构建 Compositional Layout，按当前分区类型返回 section 布局。
     static func makeLayout(sections: [HomeCollectionSection]) -> UICollectionViewCompositionalLayout {
         UICollectionViewCompositionalLayout { sectionIndex, environment in
-            guard sectionIndex < sections.count else { return nil }
-            switch sections[sectionIndex] {
+            let section = sectionIndex < sections.count ? sections[sectionIndex] : .commonApps
+            switch section {
             case .workStatus:
                 return fullWidthSection(height: AppSpacing.formRowHeight)
             case .locationReport:

suixinkan/UI/Home/HomeViewController.swift

@@ -9,6 +9,8 @@ import UIKit
 /// 首页 Tab 根页面，按身份与权限展示信息与入口。
 final class HomeViewController: BaseViewController {
 
+    private static let fallbackCellReuseIdentifier = "HomeFallbackCell"
+
     private let viewModel = HomeViewModel()
     private let homeAPI = NetworkServices.shared.homeAPI
 
@@ -117,6 +119,10 @@ final class HomeViewController: BaseViewController {
 
     private func registerCollectionCells() {
         collectionView.register(HomeWorkStatusCell.self, forCellWithReuseIdentifier: HomeWorkStatusCell.reuseIdentifier)
+        collectionView.register(
+            UICollectionViewCell.self,
+            forCellWithReuseIdentifier: Self.fallbackCellReuseIdentifier
+        )
         collectionView.register(
             HomeLocationReportCell.self,
             forCellWithReuseIdentifier: HomeLocationReportCell.reuseIdentifier
@@ -138,7 +144,18 @@ final class HomeViewController: BaseViewController {
         let dataSource = UICollectionViewDiffableDataSource<HomeCollectionSection, HomeCollectionItem>(
             collectionView: collectionView
         ) { [weak self] collectionView, indexPath, item in
-            guard let self else { return UICollectionViewCell() }
+            guard let self else {
+                return collectionView.dequeueReusableCell(
+                    withReuseIdentifier: Self.fallbackCellReuseIdentifier,
+                    for: indexPath
+                )
+            }
+            guard indexPath.section < self.currentSections.count else {
+                return collectionView.dequeueReusableCell(
+                    withReuseIdentifier: Self.fallbackCellReuseIdentifier,
+                    for: indexPath
+                )
+            }
             let section = self.currentSections[indexPath.section]
             switch (section, item) {
             case (.workStatus, .workStatus):
@@ -217,14 +234,15 @@ final class HomeViewController: BaseViewController {
                 return cell
 
             default:
-                return UICollectionViewCell()
+                return collectionView.dequeueReusableCell(
+                    withReuseIdentifier: Self.fallbackCellReuseIdentifier,
+                    for: indexPath
+                )
             }
         }
 
         dataSource.supplementaryViewProvider = { collectionView, kind, indexPath in
-            guard kind == UICollectionView.elementKindSectionHeader,
-                  indexPath.section < self.currentSections.count,
-                  self.currentSections[indexPath.section] == .commonApps else {
+            guard kind == UICollectionView.elementKindSectionHeader else {
                 return nil
             }
             let header = collectionView.dequeueReusableSupplementaryView(
@@ -232,7 +250,9 @@ final class HomeViewController: BaseViewController {
                 withReuseIdentifier: HomeSectionHeaderView.reuseIdentifier,
                 for: indexPath
             ) as! HomeSectionHeaderView
-            header.apply(title: "常用应用")
+            let title = indexPath.section < self.currentSections.count
+                && self.currentSections[indexPath.section] == .commonApps ? "常用应用" : ""
+            header.apply(title: title)
             return header
         }