feat(ads/seo/release): v1.2.0 with live Google Ads, isolated ad profile, ads.txt, and SEO/AEO/GEO optimization

tests/Paca.Tests/Mobile/MobilePrivateBrowsingGateTests.cs

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+using System;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using Paca.Mobile;
+using Paca.Mobile.Core;
+using Xunit;
+
+namespace Paca.Tests.Mobile;
+
+/// <summary>
+/// PACA Mobile 사생활 보호(InPrivate / Incognito) 세션 격리 및 수명주기 무결성 검증 게이트
+/// </summary>
+public class MobilePrivateBrowsingGateTests : IDisposable
+{
+    private readonly string _testTempDir;
+
+    public MobilePrivateBrowsingGateTests()
+    {
+        _testTempDir = Path.Combine(Path.GetTempPath(), "paca_mobile_priv_tests_" + Guid.NewGuid().ToString("N"));
+        Directory.CreateDirectory(_testTempDir);
+    }
+
+    public void Dispose()
+    {
+        try
+        {
+            if (Directory.Exists(_testTempDir))
+                Directory.Delete(_testTempDir, recursive: true);
+        }
+        catch { }
+    }
+
+    [Fact]
+    public void Gate1_MobilePrivateBrowsingPolicy_사생활보호_정책_단정_검증()
+    {
+        var privTab = new BrowserTab
+        {
+            Id = "priv-1",
+            Url = "https://confidential-portal.org",
+            IsPrivate = true
+        };
+
+        var normTab = new BrowserTab
+        {
+            Id = "norm-1",
+            Url = "https://public-news.org",
+            IsPrivate = false
+        };
+
+        // 1. 방문 기록 저장 차단 여부
+        Assert.False(MobilePrivateBrowsingPolicy.ShouldPersistHistory(privTab));
+        Assert.True(MobilePrivateBrowsingPolicy.ShouldPersistHistory(normTab));
+        Assert.False(MobilePrivateBrowsingPolicy.ShouldPersistHistory(null));
+
+        // 2. 디스크 쿠키 Flush 차단 여부 (RAM에만 유지)
+        Assert.False(MobilePrivateBrowsingPolicy.ShouldFlushCookies(privTab));
+        Assert.True(MobilePrivateBrowsingPolicy.ShouldFlushCookies(normTab));
+        Assert.False(MobilePrivateBrowsingPolicy.ShouldFlushCookies(null));
+
+        // 3. 디스크 캐시 및 양식 자동저장 차단 여부
+        Assert.False(MobilePrivateBrowsingPolicy.ShouldEnableDiskCache(privTab));
+        Assert.True(MobilePrivateBrowsingPolicy.ShouldEnableDiskCache(normTab));
+        Assert.False(MobilePrivateBrowsingPolicy.ShouldSaveFormData(privTab));
+        Assert.True(MobilePrivateBrowsingPolicy.ShouldSaveFormData(normTab));
+
+        // 4. 최근 앱 섬네일 스크린샷 방어(FLAG_SECURE) 활성화 여부
+        Assert.True(MobilePrivateBrowsingPolicy.ShouldEnableSecureWindow(privTab));
+        Assert.False(MobilePrivateBrowsingPolicy.ShouldEnableSecureWindow(normTab));
+        Assert.False(MobilePrivateBrowsingPolicy.ShouldEnableSecureWindow(null));
+    }
+
+    [Fact]
+    public void Gate2_MobileTabManager_시크릿탭_카운트_및_CloseAllPrivateTabs_검증()
+    {
+        var manager = new MobileTabManager();
+        // manager starts with 1 normal tab
+        Assert.Equal(1, manager.NormalTabCount);
+        Assert.Equal(0, manager.PrivateTabCount);
+        Assert.False(manager.HasPrivateTabs);
+
+        var priv1 = manager.AddTab("https://secret1.com", isPrivate: true);
+        var priv2 = manager.AddTab("https://secret2.com", isPrivate: true);
+        var norm2 = manager.AddTab("https://public2.com", isPrivate: false);
+
+        Assert.Equal(4, manager.Count);
+        Assert.Equal(2, manager.NormalTabCount);
+        Assert.Equal(2, manager.PrivateTabCount);
+        Assert.True(manager.HasPrivateTabs);
+
+        bool allPrivateClosedFired = false;
+        manager.AllPrivateTabsClosed += () => allPrivateClosedFired = true;
+
+        // 모든 시크릿 탭 일괄 닫기
+        manager.CloseAllPrivateTabs();
+
+        Assert.True(allPrivateClosedFired, "AllPrivateTabsClosed 이벤트가 발생해야 합니다.");
+        Assert.Equal(2, manager.Count);
+        Assert.Equal(2, manager.NormalTabCount);
+        Assert.Equal(0, manager.PrivateTabCount);
+        Assert.False(manager.HasPrivateTabs);
+        Assert.All(manager.Tabs, t => Assert.False(t.IsPrivate));
+    }
+
+    [Fact]
+    public void Gate3_마지막_시크릿탭_개별_종료_시_AllPrivateTabsClosed_이벤트_발생_검증()
+    {
+        var manager = new MobileTabManager();
+        var priv1 = manager.AddTab("https://secret-only.com", isPrivate: true);
+
+        BrowserTab? closedTab = null;
+        manager.TabClosed += t => closedTab = t;
+
+        bool allPrivateClosedFired = false;
+        manager.AllPrivateTabsClosed += () => allPrivateClosedFired = true;
+
+        manager.CloseTab(priv1.Id);
+
+        Assert.NotNull(closedTab);
+        Assert.Equal(priv1.Id, closedTab!.Id);
+        Assert.True(allPrivateClosedFired, "마지막 시크릿 탭이 닫히면 AllPrivateTabsClosed가 발행되어야 합니다.");
+        Assert.False(manager.HasPrivateTabs);
+    }
+
+    [Fact]
+    public void Gate4_MobilePrivateSessionManager_세션_종료_시_플랫폼_정화_훅_연동_검증()
+    {
+        bool cacheCleared = false;
+        bool cookiesCleared = false;
+        bool formDataCleared = false;
+        bool webStorageCleared = false;
+
+        var sessionManager = new MobilePrivateSessionManager(
+            clearCache: () => cacheCleared = true,
+            clearCookies: () => cookiesCleared = true,
+            clearFormData: () => formDataCleared = true,
+            clearWebStorage: () => webStorageCleared = true
+        );
+
+        sessionManager.PurgePrivateSessionData();
+
+        Assert.True(cacheCleared, "캐시 정화 훅이 실행되어야 합니다.");
+        Assert.True(cookiesCleared, "쿠키 정화 훅이 실행되어야 합니다.");
+        Assert.True(formDataCleared, "폼 데이터 정화 훅이 실행되어야 합니다.");
+        Assert.True(webStorageCleared, "웹 스토리지 정화 훅이 실행되어야 합니다.");
+    }
+
+    [Fact]
+    public async Task Gate5_MobileTabManager_세션_영속화_시_시크릿탭_누출_원천_차단()
+    {
+        var manager = new MobileTabManager();
+        manager.AddTab("https://public-portal.com", isPrivate: false);
+        manager.AddTab("https://confidential-bank-account.org/dashboard", isPrivate: true);
+
+        var sessionFile = Path.Combine(_testTempDir, "session_test.json");
+        await manager.SaveSessionAsync(sessionFile);
+
+        Assert.True(File.Exists(sessionFile));
+        var rawJson = await File.ReadAllTextAsync(sessionFile);
+
+        // 시크릿 URL이 디스크 파일에 일체 기록되지 않아야 함
+        Assert.DoesNotContain("confidential-bank-account", rawJson);
+        Assert.Contains("public-portal.com", rawJson);
+    }
+}