Implement profile tab with Android-aligned flows and OSS upload.

Add personal info page, account switch, real-name auth, withdrawal settings, session cache extensions, AlibabaCloudOSS SPM, and unit tests.

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

suixinkanTests/ProfileViewModelTests.swift

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+//
+//  ProfileViewModelTests.swift
+//  suixinkanTests
+//
+
+import XCTest
+@testable import suixinkan
+
+@MainActor
+/// 个人信息页 ViewModel 测试。
+final class ProfileViewModelTests: XCTestCase {
+    func testDisplayNicknameUsesFallbackWhenEmpty() {
+        let viewModel = ProfileViewModel()
+        XCTAssertEqual(viewModel.displayNickname, "未设置昵称")
+    }
+
+    func testShowPhotographerFieldsWhenRoleCodeIsPhotographer() {
+        AppStore.shared.roleCode = AppRoleCode.photographer.rawValue
+        let viewModel = ProfileViewModel()
+        XCTAssertTrue(viewModel.showPhotographerFields)
+        AppStore.shared.roleCode = ""
+    }
+
+    func testMaskCardNumberShowsLastFourDigits() {
+        XCTAssertEqual(
+            ProfileViewModel.maskCardNumber("6222021234567890"),
+            "**** **** **** 7890"
+        )
+    }
+
+    func testUpdatePasswordRejectsShortPassword() async {
+        let session = MockURLSession(responses: [])
+        let api = ProfileAPI(client: APIClient(environment: .testing, session: session))
+        let viewModel = ProfileViewModel()
+
+        do {
+            try await viewModel.updatePassword("12345", api: api)
+            XCTFail("短密码应抛出校验错误")
+        } catch {
+            guard let validationError = error as? ProfileValidationError else {
+                return XCTFail("期望 ProfileValidationError，实际为 \(error)")
+            }
+            XCTAssertEqual(validationError, .shortPassword)
+        }
+    }
+
+    func testBeginEditingPrefillsNickname() {
+        let viewModel = ProfileViewModel()
+        viewModel.beginEditing()
+        XCTAssertTrue(viewModel.isEditingProfile)
+    }
+}