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

tests/Paca.Tests/App/QuickCaptureHudWindowGateTests.cs

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+using System;
+using System.Text.RegularExpressions;
+using System.Windows;
+using System.Windows.Controls;
+using Paca.App.Browser;
+using Paca.App.ViewModels;
+using Paca.Tests.Infrastructure;
+using Xunit;
+
+namespace Paca.Tests.App;
+
+public class QuickCaptureHudWindowGateTests
+{
+    [Fact]
+    public void Gate227_QuickCaptureHudWindow_HasCorrectWindowStyles()
+    {
+        using var sta = StaDispatcher.Start();
+        sta.Invoke(() =>
+        {
+            var vm = new QuickCaptureHudViewModel("https://youtube.com/watch?v=abc");
+            var window = new QuickCaptureHudWindow(vm);
+
+            Assert.True(window.AllowsTransparency);
+            Assert.Equal(WindowStyle.None, window.WindowStyle);
+            Assert.False(window.ShowInTaskbar);
+            Assert.True(window.Topmost);
+        });
+    }
+
+    [Fact]
+    public void Gate228_QuickCaptureHudWindow_BindsViewModel_AndExposesControls()
+    {
+        using var sta = StaDispatcher.Start();
+        sta.Invoke(() =>
+        {
+            var vm = new QuickCaptureHudViewModel("https://twitter.com/test/video");
+            var window = new QuickCaptureHudWindow(vm);
+
+            Assert.Equal(vm, window.ViewModel);
+            Assert.NotNull(window.DownloadButton);
+            Assert.NotNull(window.SendToPhoneButton);
+            Assert.NotNull(window.DismissButton);
+        });
+    }
+
+    [Fact]
+    public void Gate229_QuickCaptureHudWindow_StrictDesignTokens_Audit()
+    {
+        using var sta = StaDispatcher.Start();
+        sta.Invoke(() =>
+        {
+            var vm = new QuickCaptureHudViewModel("https://instagram.com/reel/xyz");
+            var window = new QuickCaptureHudWindow(vm);
+
+            // 1. Min button height >= 32px
+            Assert.True(window.DownloadButton.MinHeight >= 32, "Download button height >= 32");
+            Assert.True(window.SendToPhoneButton.MinHeight >= 32, "SendToPhone button height >= 32");
+
+            // 2. Strict no emoji regex audit
+            var emojiRegex = new Regex(@"[\uD83C-\uDBFF\uDC00-\uDFFF]");
+            Assert.DoesNotMatch(emojiRegex, window.DownloadButton.Content?.ToString() ?? "");
+            Assert.DoesNotMatch(emojiRegex, window.SendToPhoneButton.Content?.ToString() ?? "");
+        });
+    }
+
+    [Fact]
+    public void Gate230_QuickCaptureHudWindow_Positioning_CalculatesBottomRightCoordinates()
+    {
+        using var sta = StaDispatcher.Start();
+        sta.Invoke(() =>
+        {
+            var vm = new QuickCaptureHudViewModel("https://example.com");
+            var window = new QuickCaptureHudWindow(vm);
+
+            var (left, top) = window.CalculateDefaultPosition(1920, 1080, 420, 100);
+            
+            // Bottom right with margin: left ~ 1920 - 420 - 24 = 1476, top ~ 1080 - 100 - 64 = 916
+            Assert.True(left > 1400);
+            Assert.True(top > 900);
+        });
+    }
+}