对齐有线传图页 Android UI，并改用相对路径持久化本地照片。

还原顶栏、浮动卡片、时间侧栏与底部交互；照片路径改为 CameraDownloads 相对路径并兼容旧数据；格式 Chip 固定 JPG 且不可点击。

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

suixinkan/Features/TravelAlbum/Services/DeviceStorageHelper.swift

@@ -0,0 +1,58 @@
+//
+//  DeviceStorageHelper.swift
+//  suixinkan
+//
+//  读取本机型号与可用存储，对齐 Android DeviceStorageHelper。
+//
+
+import Foundation
+import UIKit
+
+/// 设备存储快照，用于有线传图页设备信息面板。
+struct DeviceStorageSnapshot: Equatable {
+    let modelName: String
+    let availableGbText: String
+}
+
+/// 设备存储信息读取工具。
+enum DeviceStorageHelper {
+    /// 读取当前设备型号与 Documents 目录可用空间。
+    static func readStorageSnapshot() -> DeviceStorageSnapshot {
+        let availableBytes = availableDocumentsBytes()
+        let availableGb = Double(availableBytes) / 1024.0 / 1024.0 / 1024.0
+        return DeviceStorageSnapshot(
+            modelName: buildModelName(),
+            availableGbText: String(format: "还剩 %.1fGB 可用", availableGb)
+        )
+    }
+
+    private static func buildModelName() -> String {
+        var systemInfo = utsname()
+        uname(&systemInfo)
+        let machine = withUnsafePointer(to: &systemInfo.machine) {
+            $0.withMemoryRebound(to: CChar.self, capacity: 1) {
+                String(cString: $0)
+            }
+        }
+        let marketingName = UIDevice.current.name.trimmingCharacters(in: .whitespacesAndNewlines)
+        if !marketingName.isEmpty, marketingName != "iPhone", !marketingName.hasPrefix("iPad") {
+            return marketingName
+        }
+        if !machine.isEmpty { return machine }
+        return UIDevice.current.model
+    }
+
+    private static func availableDocumentsBytes() -> Int64 {
+        let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first
+        guard let documentsURL else { return 0 }
+        let values = try? documentsURL.resourceValues(forKeys: [.volumeAvailableCapacityForImportantUsageKey])
+        if let capacity = values?.volumeAvailableCapacityForImportantUsage {
+            return Int64(capacity)
+        }
+        if let attributes = try? FileManager.default.attributesOfFileSystem(forPath: documentsURL.path),
+           let freeSize = attributes[.systemFreeSize] as? NSNumber {
+            return freeSize.int64Value
+        }
+        return 0
+    }
+}