Initial commit: suixinkan_ios UIKit rewrite project.

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

suixinkan_ios/Features/Home/ViewControllers/HomePlaceholderViewController.swift

@@ -0,0 +1,63 @@
+//
+//  HomePlaceholderViewController.swift
+//  suixinkan
+//
+//  Created by Codex on 2026/6/26.
+//
+
+import SnapKit
+import UIKit
+
+/// 首页迁移占位页，用于尚未完成 UIKit 迁移的入口。
+final class HomePlaceholderViewController: UIViewController {
+    private let pageTitle: String
+    private let uri: String?
+
+    init(title: String, uri: String? = nil) {
+        pageTitle = title
+        self.uri = uri
+        super.init(nibName: nil, bundle: nil)
+    }
+
+    @available(*, unavailable)
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        title = pageTitle
+        view.backgroundColor = UIColor(hex: 0xF5F7FA)
+
+        let iconView = UIImageView(image: UIImage(systemName: "square.grid.2x2"))
+        iconView.tintColor = AppDesign.primary
+        iconView.contentMode = .scaleAspectFit
+
+        let titleLabel = UILabel()
+        titleLabel.text = pageTitle
+        titleLabel.font = .systemFont(ofSize: 20, weight: .semibold)
+        titleLabel.textColor = AppDesign.textPrimary
+        titleLabel.textAlignment = .center
+
+        let uriLabel = UILabel()
+        uriLabel.text = uri
+        uriLabel.font = .systemFont(ofSize: 14)
+        uriLabel.textColor = AppDesign.textSecondary
+        uriLabel.textAlignment = .center
+        uriLabel.numberOfLines = 2
+        uriLabel.isHidden = uri?.isEmpty != false
+
+        let stack = UIStackView(arrangedSubviews: [iconView, titleLabel, uriLabel])
+        stack.axis = .vertical
+        stack.spacing = 12
+        stack.alignment = .center
+        view.addSubview(stack)
+        stack.snp.makeConstraints { make in
+            make.center.equalToSuperview()
+            make.leading.trailing.equalToSuperview().inset(24)
+        }
+        iconView.snp.makeConstraints { make in
+            make.width.height.equalTo(44)
+        }
+    }
+}