完善素材管理 UI 交互并修复列表解析与时间选择。

MaterialItem 兼容 Android 缺失字段默认值，优化素材详情/列表/标签布局与上下架开关交互，修复个人空间时间选择器初始值。

Co-authored-by: Cursor <cursoragent@cursor.com>

suixinkan/UI/MaterialManagement/MaterialDetailViewController.swift

@@ -49,7 +49,7 @@ final class MaterialDetailViewController: BaseViewController {
     override func setupUI() {
         view.backgroundColor = UIColor(hex: 0xF4F4F4)
         contentStack.axis = .vertical
-        contentStack.spacing = 12
+        contentStack.spacing = 0
         scrollView.backgroundColor = UIColor(hex: 0xF4F4F4)
         bottomBar.backgroundColor = .white
 
@@ -60,8 +60,11 @@ final class MaterialDetailViewController: BaseViewController {
         scrollView.addSubview(contentStack)
         contentStack.addArrangedSubview(carouselView)
         contentStack.addArrangedSubview(infoSection)
+        contentStack.addArrangedSubview(makeVerticalSpacer(height: 12))
         contentStack.addArrangedSubview(uploaderSection)
+        contentStack.addArrangedSubview(makeVerticalSpacer(height: 12))
         contentStack.addArrangedSubview(reviewSection)
+        contentStack.addArrangedSubview(makeVerticalSpacer(height: 16))
         view.addSubview(bottomBar)
         bottomBar.addSubview(deleteButton)
         bottomBar.addSubview(editButton)
@@ -131,6 +134,15 @@ final class MaterialDetailViewController: BaseViewController {
         button.layer.cornerRadius = 8
     }
 
+    private func makeVerticalSpacer(height: CGFloat) -> UIView {
+        let spacer = UIView()
+        spacer.backgroundColor = .clear
+        spacer.snp.makeConstraints { make in
+            make.height.equalTo(height)
+        }
+        return spacer
+    }
+
     @MainActor
     private func applyViewModel() {
         if (viewModel.isLoading || viewModel.isDeleting) && viewModel.detail == nil {
@@ -470,6 +482,7 @@ private final class MaterialDetailInfoSection: UIView {
     private let downloadStat = MaterialDetailStatView(iconName: "material_ic_download_count")
     private let likeStat = MaterialDetailStatView(iconName: "sample_ic_like_count")
     private let collectStat = MaterialDetailStatView(iconName: "sample_ic_collect_count")
+    private var statsTopConstraint: Constraint?
 
     override init(frame: CGRect) {
         super.init(frame: frame)
@@ -483,7 +496,7 @@ private final class MaterialDetailInfoSection: UIView {
         listingBadge.textAlignment = .center
         tagStack.axis = .horizontal
         tagStack.spacing = 8
-        tagStack.alignment = .leading
+        tagStack.alignment = .center
         statsStack.axis = .horizontal
         statsStack.spacing = 16
         [downloadStat, likeStat, collectStat].forEach(statsStack.addArrangedSubview)
@@ -507,7 +520,7 @@ private final class MaterialDetailInfoSection: UIView {
             make.leading.trailing.equalToSuperview().inset(16)
         }
         statsStack.snp.makeConstraints { make in
-            make.top.equalTo(tagStack.snp.bottom).offset(12)
+            statsTopConstraint = make.top.equalTo(tagStack.snp.bottom).offset(12).constraint
             make.leading.equalToSuperview().offset(16)
             make.trailing.lessThanOrEqualToSuperview().inset(16)
             make.bottom.equalToSuperview().inset(16)
@@ -527,14 +540,20 @@ private final class MaterialDetailInfoSection: UIView {
         listingBadge.textColor = color
         listingBadge.backgroundColor = color.withAlphaComponent(0.1)
         tagStack.arrangedSubviews.forEach { $0.removeFromSuperview() }
-        (detail.materialTag ?? []).forEach { tagStack.addArrangedSubview(makeTag($0.name)) }
+        let tags = detail.materialTag ?? []
+        tags.forEach { tagStack.addArrangedSubview(makeTag($0.name)) }
+        if !tags.isEmpty {
+            tagStack.addArrangedSubview(UIView())
+        }
+        tagStack.isHidden = tags.isEmpty
+        statsTopConstraint?.update(offset: tags.isEmpty ? 0 : 12)
         downloadStat.setCount(detail.downloadCount)
         likeStat.setCount(detail.likesCount)
         collectStat.setCount(detail.collectCount)
     }
 
     private func makeTag(_ title: String) -> UILabel {
-        let label = UILabel()
+        let label = MaterialDetailTagLabel(horizontalInset: 6)
         label.text = title
         label.font = .systemFont(ofSize: 12)
         label.textColor = AppColor.primary
@@ -542,9 +561,10 @@ private final class MaterialDetailInfoSection: UIView {
         label.backgroundColor = UIColor(hex: 0xEFF6FF)
         label.layer.cornerRadius = 4
         label.clipsToBounds = true
+        label.setContentHuggingPriority(.required, for: .horizontal)
+        label.setContentCompressionResistancePriority(.required, for: .horizontal)
         label.snp.makeConstraints { make in
             make.height.equalTo(22)
-            make.width.greaterThanOrEqualTo(40)
         }
         return label
     }
@@ -632,7 +652,7 @@ private final class MaterialDetailUploaderSection: UIView {
     }
 
     private func makeTag(_ title: String) -> UILabel {
-        let label = UILabel()
+        let label = MaterialDetailTagLabel(horizontalInset: 6)
         label.text = title
         label.textColor = .white
         label.font = .systemFont(ofSize: 8)
@@ -642,12 +662,35 @@ private final class MaterialDetailUploaderSection: UIView {
         label.clipsToBounds = true
         label.snp.makeConstraints { make in
             make.height.equalTo(16)
-            make.width.greaterThanOrEqualTo(44)
         }
         return label
     }
 }
 
+/// 为详情页标签文本提供固定水平内边距，使背景宽度随内容自适应。
+private final class MaterialDetailTagLabel: UILabel {
+    private let horizontalInset: CGFloat
+
+    init(horizontalInset: CGFloat) {
+        self.horizontalInset = horizontalInset
+        super.init(frame: .zero)
+    }
+
+    @available(*, unavailable)
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    override func drawText(in rect: CGRect) {
+        super.drawText(in: rect.insetBy(dx: horizontalInset, dy: 0))
+    }
+
+    override var intrinsicContentSize: CGSize {
+        let size = super.intrinsicContentSize
+        return CGSize(width: size.width + horizontalInset * 2, height: size.height)
+    }
+}
+
 /// 素材审核信息区。
 /// 素材详情的审核信息区块。
 private final class MaterialDetailReviewSection: UIView {