新增资产模块，包含云存储与媒体库流程

为云端与素材管理页面接入首页路由，将共享云存储模型迁入 Assets 模块，并补充 API/ViewModel 测试。

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

suixinkan/Features/Tasks/Models/TaskModels.swift

@@ -283,76 +283,6 @@ struct UploadFileItem: Encodable, Equatable {
     }
 }
 
-/// 云盘文件实体，表示发布任务时可选择的云盘文件或文件夹。
-struct CloudDriveFile: Decodable, Identifiable, Hashable {
-    let id: Int
-    let parentFolderId: Int
-    let fileUrl: String
-    let coverUrl: String
-    let updatedAt: String
-    let name: String
-    let createdAt: String
-    let childNum: Int
-    let type: Int
-    let fileSize: Int64
-
-    /// 判断当前云盘项是否为文件夹。
-    var isFolder: Bool { type == 99 }
-
-    /// 判断当前云盘项是否为视频文件。
-    var isVideo: Bool {
-        type == 1 || Self.hasVideoExtension(name) || Self.hasVideoExtension(fileUrl)
-    }
-
-    /// 根据文件扩展名判断是否是常见视频格式。
-    private static func hasVideoExtension(_ value: String) -> Bool {
-        ["mp4", "mov", "m4v", "avi"].contains(URL(string: value)?.pathExtension.lowercased() ?? URL(fileURLWithPath: value).pathExtension.lowercased())
-    }
-
-    /// 云盘文件字段映射，兼容后端下划线命名。
-    enum CodingKeys: String, CodingKey {
-        case id
-        case parentFolderId = "parent_folder_id"
-        case fileUrl = "file_url"
-        case coverUrl = "cover_url"
-        case updatedAt = "updated_at"
-        case name
-        case createdAt = "created_at"
-        case childNum = "child_num"
-        case type
-        case fileSize = "file_size"
-    }
-
-    /// 构造本地路径根节点，供云盘选择器维护面包屑。
-    init(id: Int, name: String) {
-        self.id = id
-        parentFolderId = 0
-        fileUrl = ""
-        coverUrl = ""
-        updatedAt = ""
-        self.name = name
-        createdAt = ""
-        childNum = 0
-        type = 99
-        fileSize = 0
-    }
-
-    /// 宽松解码云盘文件字段。
-    init(from decoder: Decoder) throws {
-        let container = try decoder.container(keyedBy: CodingKeys.self)
-        id = try container.decodeLossyInt(forKey: .id) ?? 0
-        parentFolderId = try container.decodeLossyInt(forKey: .parentFolderId) ?? 0
-        fileUrl = try container.decodeLossyString(forKey: .fileUrl)
-        coverUrl = try container.decodeLossyString(forKey: .coverUrl)
-        updatedAt = try container.decodeLossyString(forKey: .updatedAt)
-        name = try container.decodeLossyString(forKey: .name)
-        createdAt = try container.decodeLossyString(forKey: .createdAt)
-        childNum = try container.decodeLossyInt(forKey: .childNum) ?? 0
-        type = try container.decodeLossyInt(forKey: .type) ?? 0
-        fileSize = Int64(try container.decodeLossyInt(forKey: .fileSize) ?? 0)
-    }
-}
-
 private extension KeyedDecodingContainer {
     /// 将 String、数字和 Bool 宽松解码为字符串。
     func decodeLossyString(forKey key: Key) throws -> String {