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

tests/Paca.Tests/Browser/ChromeTaskManagerAdvancedTests.cs

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+using System.Linq;
+using Paca.Browser;
+using Paca.Browser.Extensions;
+using Paca.Browser.Tabs;
+using Xunit;
+
+namespace Paca.Tests.Browser;
+
+public class ChromeTaskManagerAdvancedTests
+{
+    [Fact]
+    public void CollectTasks_Includes_Gpu_Process_And_Tabs()
+    {
+        var tabMgr = new TabManager(() => new TabItem());
+        tabMgr.NewTab("https://github.com");
+        tabMgr.NewTab("https://youtube.com");
+
+        var tasks = BrowserTaskManager.CollectTasks(tabMgr);
+
+        // Must include Main Browser, GPU Process, and 2 Tabs
+        Assert.Contains(tasks, t => t.Type == BrowserTaskType.Browser && t.Id == "browser-main");
+        Assert.Contains(tasks, t => t.Type == BrowserTaskType.Gpu && t.Id == "gpu-process");
+        Assert.Equal(2, tasks.Count(t => t.Type == BrowserTaskType.Tab));
+    }
+
+    [Fact]
+    public void BrowserTaskManager_Sorts_By_Columns()
+    {
+        var tabMgr = new TabManager(() => new TabItem());
+        var t1 = tabMgr.NewTab("https://a.com");
+        var t2 = tabMgr.NewTab("https://b.com");
+
+        var tasks = BrowserTaskManager.CollectTasks(tabMgr);
+
+        // Sort by Memory Descending
+        var byMemory = BrowserTaskManager.SortTasks(tasks, BrowserTaskSortColumn.Memory, descending: true);
+        Assert.True(byMemory[0].MemoryBytes >= byMemory[1].MemoryBytes);
+
+        // Sort by CPU Descending
+        var byCpu = BrowserTaskManager.SortTasks(tasks, BrowserTaskSortColumn.Cpu, descending: true);
+        Assert.True(byCpu[0].CpuPercent >= byCpu[1].CpuPercent);
+    }
+
+    [Fact]
+    public void BrowserTaskItem_Formats_NetworkDisplay()
+    {
+        var task = new BrowserTaskItem(
+            Id: "tab-1",
+            Title: "Tab 1",
+            Url: "https://example.com",
+            Type: BrowserTaskType.Tab,
+            MemoryBytes: 50 * 1024 * 1024,
+            CpuPercent: 2.5,
+            NetworkBytesPerSec: 1536000); // ~1.5 MB/s
+
+        Assert.Equal("50.0 MB", task.MemoryDisplay);
+        Assert.Equal("2.5%", task.CpuDisplay);
+        Assert.Equal("1.5 MB/s", task.NetworkDisplay);
+    }
+
+    [Fact]
+    public void CollectTasks_Differentiates_Active_And_Background_Tabs()
+    {
+        var tabMgr = new TabManager(() => new TabItem());
+        var activeTab = tabMgr.NewTab("https://active.com", activate: true);
+        var bgTab = tabMgr.NewTab("https://background.com", activate: false);
+
+        var tasks = BrowserTaskManager.CollectTasks(tabMgr);
+        var activeTask = tasks.First(t => t.Id == activeTab.Id.ToString());
+        var bgTask = tasks.First(t => t.Id == bgTab.Id.ToString());
+
+        // Active tab must show higher or equal CPU activity and allocated working set
+        Assert.True(activeTask.CpuPercent > bgTask.CpuPercent, "Active tab should report higher CPU usage than background tab");
+        Assert.True(activeTask.MemoryBytes >= bgTask.MemoryBytes, "Active tab should report equal or higher memory");
+    }
+
+    [Fact]
+    public void EndTask_ClosesTab_Or_DisablesExtension()
+    {
+        var tabMgr = new TabManager(() => new TabItem());
+        var tab1 = tabMgr.NewTab("https://closeme.com");
+        var tasks = BrowserTaskManager.CollectTasks(tabMgr);
+        var tabTask = tasks.First(t => t.Id == tab1.Id.ToString());
+
+        bool ended = BrowserTaskManager.EndTask(tabTask, tabMgr);
+        Assert.True(ended);
+        Assert.DoesNotContain(tab1, tabMgr.Tabs);
+    }
+}