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/DeclarativeNetRequestPriorityTests.cs

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+using System.Collections.Generic;
+using Paca.Browser.Extensions;
+using Xunit;
+
+namespace Paca.Tests.Browser;
+
+public class DeclarativeNetRequestPriorityTests
+{
+    [Fact]
+    public void HigherPriority_AllowRule_Overrides_LowerPriority_BlockRule()
+    {
+        var engine = new DeclarativeNetRequestEngine();
+
+        // 1. Static Rule: Priority 1 - Block doubleclick.net
+        engine.RegisterStaticRules("ext1", new List<DnrRule>
+        {
+            new DnrRule
+            {
+                Id = 1,
+                Priority = 1,
+                Action = new DnrRuleAction { Type = "block" },
+                Condition = new DnrRuleCondition { UrlFilter = "||doubleclick.net^" }
+            }
+        });
+
+        // 2. Dynamic Rule: Priority 2 - Allow doubleclick.net/allowed
+        engine.UpdateDynamicRules("ext1", null, new List<DnrRule>
+        {
+            new DnrRule
+            {
+                Id = 2,
+                Priority = 2,
+                Action = new DnrRuleAction { Type = "allow" },
+                Condition = new DnrRuleCondition { UrlFilter = "||doubleclick.net/allowed^" }
+            }
+        });
+
+        // 일반 픽셀은 Block
+        var blockDecision = engine.EvaluateRequest("https://ad.doubleclick.net/pixel", method: "GET", resourceType: "xmlhttprequest");
+        Assert.Equal(DnrRuleActionType.Block, blockDecision.ActionType);
+        Assert.Equal(1, blockDecision.MatchedRuleId);
+
+        // 허용 경로는 Priority 2인 Allow 룰이 Block을 오버라이드
+        var allowDecision = engine.EvaluateRequest("https://ad.doubleclick.net/allowed/test", method: "GET", resourceType: "xmlhttprequest");
+        Assert.Equal(DnrRuleActionType.Allow, allowDecision.ActionType);
+        Assert.Equal(2, allowDecision.MatchedRuleId);
+    }
+
+    [Fact]
+    public void SessionRules_HavePrecedence_Over_StaticRules()
+    {
+        var engine = new DeclarativeNetRequestEngine();
+
+        // Static: Block example.com
+        engine.RegisterStaticRules("ext1", new List<DnrRule>
+        {
+            new DnrRule
+            {
+                Id = 10,
+                Priority = 10,
+                Action = new DnrRuleAction { Type = "block" },
+                Condition = new DnrRuleCondition { UrlFilter = "||example.com^" }
+            }
+        });
+
+        // Session: AllowAllRequests for example.com (동일 priority에서도 Session이 Static을 압도)
+        engine.UpdateSessionRules("ext1", null, new List<DnrRule>
+        {
+            new DnrRule
+            {
+                Id = 20,
+                Priority = 10,
+                Action = new DnrRuleAction { Type = "allowAllRequests" },
+                Condition = new DnrRuleCondition { UrlFilter = "||example.com^" }
+            }
+        });
+
+        var decision = engine.EvaluateRequest("https://example.com/page", method: "GET", resourceType: "main_frame");
+        Assert.Equal(DnrRuleActionType.AllowAllRequests, decision.ActionType);
+        Assert.Equal(20, decision.MatchedRuleId);
+    }
+}