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/ChromeOmniboxAutocompleteTests.cs

@@ -0,0 +1,79 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Paca.Browser.Tabs;
+using Xunit;
+
+namespace Paca.Tests.Browser;
+
+public class ChromeOmniboxAutocompleteTests
+{
+    [Fact]
+    public void OmniboxAutocompleteScorer_Calculates_Scores_Correctly()
+    {
+        var now = DateTime.UtcNow;
+
+        // 1. Exact URL match (e.g. typing "github.com")
+        var scoreExactUrl = OmniboxAutocompleteScorer.CalculateScore("github.com", "GitHub: Where the world builds", "https://github.com", visitCount: 50, lastVisit: now);
+        
+        // 2. Substring match
+        var scoreSub = OmniboxAutocompleteScorer.CalculateScore("hub", "GitHub: Where the world builds", "https://github.com", visitCount: 1, lastVisit: now.AddDays(-10));
+
+        // 3. No match
+        var scoreNoMatch = OmniboxAutocompleteScorer.CalculateScore("banana", "GitHub", "https://github.com", visitCount: 50, lastVisit: now);
+
+        Assert.True(scoreExactUrl > scoreSub, $"Exact URL score ({scoreExactUrl}) should be higher than substring score ({scoreSub})");
+        Assert.Equal(0, scoreNoMatch);
+    }
+
+    [Fact]
+    public void OmniboxSuggestionAggregator_Combines_And_Ranks_Sources()
+    {
+        var aggregator = new OmniboxSuggestionAggregator();
+
+        var openTabs = new List<OmniboxCandidate>
+        {
+            new("Google Search", "https://www.google.com", OmniboxSuggestionType.OpenTab, VisitCount: 10, LastVisited: DateTime.UtcNow)
+        };
+
+        var bookmarks = new List<OmniboxCandidate>
+        {
+            new("GitHub Main", "https://github.com", OmniboxSuggestionType.Bookmark, VisitCount: 5, LastVisited: DateTime.UtcNow.AddDays(-1)),
+            new("Google Drive", "https://drive.google.com", OmniboxSuggestionType.Bookmark, VisitCount: 20, LastVisited: DateTime.UtcNow)
+        };
+
+        var history = new List<OmniboxCandidate>
+        {
+            new("Stack Overflow", "https://stackoverflow.com/questions", OmniboxSuggestionType.History, VisitCount: 2, LastVisited: DateTime.UtcNow.AddDays(-2))
+        };
+
+        var suggestions = aggregator.Aggregate("google", openTabs, bookmarks, history, maxCount: 5);
+
+        Assert.Equal(2, suggestions.Count);
+        Assert.All(suggestions, s => Assert.Contains("google", s.Url + s.Title, StringComparison.OrdinalIgnoreCase));
+
+        // Top match should have higher score
+        Assert.True(suggestions[0].Score >= suggestions[1].Score);
+    }
+
+    [Fact]
+    public void OmniboxSuggestionAggregator_Deduplicates_Url_Across_Sources()
+    {
+        var aggregator = new OmniboxSuggestionAggregator();
+
+        // Same URL in open tab and bookmark: OpenTab takes priority or higher score wins
+        var openTabs = new List<OmniboxCandidate>
+        {
+            new("Paca Official", "https://paca.app", OmniboxSuggestionType.OpenTab, 1, DateTime.UtcNow)
+        };
+
+        var bookmarks = new List<OmniboxCandidate>
+        {
+            new("Paca App", "https://paca.app", OmniboxSuggestionType.Bookmark, 10, DateTime.UtcNow)
+        };
+
+        var results = aggregator.Aggregate("paca", openTabs, bookmarks, new List<OmniboxCandidate>(), maxCount: 5);
+        Assert.Single(results);
+        Assert.Equal("https://paca.app", results[0].Url);
+    }
+}