将 otg_swift OTG 引擎迁入 Core/CameraOTG，并接入旅拍有线传图与历史导入。

恢复 USB 相机连接、边拍边传、三品牌驱动与 SwiftUI 历史导入页，通过适配层对接现有本地上传与 OSS 管道。

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

suixinkanTests/CameraOTG/PTPUtilitiesTests.swift

@@ -0,0 +1,76 @@
+//
+//  PTPUtilitiesTests.swift
+//  suixinkanTests
+//
+
+import XCTest
+@testable import suixinkan
+
+/// PTP Container 构建与解析测试。
+final class PTPUtilitiesTests: XCTestCase {
+    /// 测试 buildCommand 与 parseContainer 往返一致。
+    func testBuildAndParseCommandRoundTrip() throws {
+        let command = PTPHelper.buildCommand(
+            code: PTPStandardCommand.getObject,
+            transactionID: 42,
+            parameters: [1, 2, 3]
+        )
+
+        let parsed = try PTPHelper.parseContainer(command)
+        XCTAssertEqual(parsed.length, UInt32(12 + 4 * 3))
+        XCTAssertEqual(parsed.type, PTPContainerType.command.rawValue)
+        XCTAssertEqual(parsed.code, PTPStandardCommand.getObject)
+        XCTAssertEqual(parsed.transactionID, 42)
+        XCTAssertEqual(parsed.params, [1, 2, 3])
+    }
+
+    /// 测试数据过短时抛出 tooShort。
+    func testParseContainerTooShortThrows() {
+        XCTAssertThrowsError(try PTPHelper.parseContainer(Data([0x01, 0x02]))) { error in
+            XCTAssertEqual(error as? PTPParseError, .tooShort)
+        }
+    }
+
+    /// 测试 length 与 buffer 不一致时抛出 invalidLength。
+    func testParseContainerInvalidLengthThrows() {
+        var data = Data(count: 12)
+        data[0] = 32
+        XCTAssertThrowsError(try PTPHelper.parseContainer(data)) { error in
+            XCTAssertEqual(error as? PTPParseError, .invalidLength)
+        }
+    }
+
+    /// 测试 objectSignature 拼接规则。
+    func testObjectSignature() {
+        XCTAssertEqual(PTPHelper.objectSignature(filename: "DSC_0001.JPG", size: 2048), "DSC_0001.JPG_2048")
+    }
+
+    /// 测试 sanitizeFilename 去除非法路径字符。
+    func testSanitizeFilename() {
+        XCTAssertEqual(PTPHelper.sanitizeFilename("DSC/0001.JPG"), "DSC_0001.JPG")
+        XCTAssertEqual(PTPHelper.sanitizeFilename("   "), "photo.jpg")
+    }
+
+    /// 测试从 ObjectInfo 固定偏移解析压缩大小。
+    func testParseObjectCompressedSize() {
+        var data = Data(count: 12)
+        data[8] = 0x00
+        data[9] = 0x10
+        data[10] = 0x00
+        data[11] = 0x00
+        XCTAssertEqual(PTPHelper.parseObjectCompressedSize(data), 4096)
+    }
+
+    /// 测试 ResponseOK 判断。
+    func testIsResponseOK() throws {
+        let okResponse = PTPHelper.buildCommand(
+            code: PTPStandardCommand.responseOK,
+            transactionID: 1,
+            parameters: []
+        )
+        var responseData = okResponse
+        responseData[4] = UInt8(PTPContainerType.response.rawValue & 0xFF)
+        responseData[5] = UInt8((PTPContainerType.response.rawValue >> 8) & 0xFF)
+        XCTAssertTrue(PTPHelper.isResponseOK(responseData))
+    }
+}