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/MobileBrowserCoreTests.cs

@@ -234,4 +234,60 @@ public class MobileBrowserCoreTests : IDisposable
         Assert.Equal(145.5, video.DurationSeconds);
         Assert.Equal("https://video.example.com/thumb.jpg", video.ThumbnailUrl);
     }
+
+    [Fact]
+    public void TabManager_FindTabByUrlOrHost_MatchesExactAndSubdomains()
+    {
+        var manager = new MobileTabManager();
+        var tab1 = manager.AddTab("https://m.youtube.com");
+        var tab2 = manager.AddTab("https://chzzk.naver.com");
+
+        // 1. Exact match
+        var foundExact = manager.FindTabByUrlOrHost("https://m.youtube.com");
+        Assert.NotNull(foundExact);
+        Assert.Equal(tab1.Id, foundExact!.Id);
+
+        // 2. Host match with different subdomain (www vs m)
+        var foundSub = manager.FindTabByUrlOrHost("https://www.youtube.com/watch?v=abc");
+        Assert.NotNull(foundSub);
+        Assert.Equal(tab1.Id, foundSub!.Id);
+
+        // 3. Unrelated domain returns null
+        var foundNone = manager.FindTabByUrlOrHost("https://m.sooplive.co.kr");
+        Assert.Null(foundNone);
+
+        // 4. Special internal schemes like paca://newtab do not match arbitrary external URLs
+        var foundNtp = manager.FindTabByUrlOrHost("paca://newtab");
+        Assert.NotNull(foundNtp);
+        Assert.True(foundNtp!.IsNewTabPage);
+    }
+
+    [Fact]
+    public void TabManager_OpenOrSwitchTab_ReusesExistingDomainTabOrNtp()
+    {
+        var manager = new MobileTabManager();
+        // Initial tab is paca://newtab
+        Assert.Equal(1, manager.Count);
+        Assert.True(manager.ActiveTab!.IsNewTabPage);
+
+        // Opening first URL replaces the empty initial NTP
+        var (opened1, isExisting1) = manager.OpenOrSwitchTab("https://m.youtube.com");
+        Assert.Equal(1, manager.Count);
+        Assert.False(isExisting1);
+        Assert.Equal("https://m.youtube.com", manager.ActiveTab?.Url);
+
+        // Opening a different domain creates a 2nd tab
+        var (opened2, isExisting2) = manager.OpenOrSwitchTab("https://m.naver.com");
+        Assert.Equal(2, manager.Count);
+        Assert.False(isExisting2);
+        Assert.Equal("https://m.naver.com", manager.ActiveTab?.Url);
+
+        // Re-opening youtube domain should NOT create a 3rd tab; it switches to the existing tab
+        var (switched, isExisting3) = manager.OpenOrSwitchTab("https://www.youtube.com/watch?v=xyz");
+        Assert.Equal(2, manager.Count);
+        Assert.True(isExisting3);
+        Assert.Equal(opened1.Id, switched.Id);
+        Assert.Equal(opened1.Id, manager.ActiveTab?.Id);
+    }
 }
+