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

tests/Paca.Tests/Core/MediaFileNameTemplateGateTests.cs

@@ -0,0 +1,73 @@
+using System;
+using Paca.Mobile.Core;
+using Xunit;
+
+namespace Paca.Tests.Core;
+
+public class MediaFileNameTemplateGateTests
+{
+    [Fact]
+    public void Gate361_MediaFileNameTemplate_SubstitutesTokens_Accurately()
+    {
+        var ctx = new MediaTemplateContext
+        {
+            Title = "Rolling in the Deep",
+            Artist = "Adele",
+            Channel = "AdeleVEVO",
+            Domain = "youtube.com",
+            Resolution = "1080p",
+            UploadDate = new DateTime(2010, 11, 30),
+            TrackNumber = 1
+        };
+
+        var template = "[{domain}] {artist} - {title} ({resolution})";
+        var result = MediaFileNameTemplateEngine.FormatFileName(template, ctx);
+
+        Assert.Equal("[youtube.com] Adele - Rolling in the Deep (1080p)", result);
+    }
+
+    [Fact]
+    public void Gate362_MediaFileNameTemplate_HandlesNullTokens_Gracefully()
+    {
+        var ctx = new MediaTemplateContext
+        {
+            Title = "Solo Track",
+            Artist = null,
+            Resolution = null
+        };
+
+        var template = "{artist} - {title} [{resolution}]";
+        var result = MediaFileNameTemplateEngine.FormatFileName(template, ctx);
+
+        // Null tokens are omitted or stripped cleanly
+        Assert.Equal("Solo Track", result);
+    }
+
+    [Fact]
+    public void Gate363_MediaFileNameTemplate_SanitizesIllegalCharacters()
+    {
+        var dirty = "Who: Are / You * In <Wonderland>? | Check \"This\"";
+        var clean = MediaFileNameTemplateEngine.SanitizePathSegment(dirty);
+
+        Assert.DoesNotContain(":", clean);
+        Assert.DoesNotContain("/", clean);
+        Assert.DoesNotContain("*", clean);
+        Assert.DoesNotContain("<", clean);
+        Assert.DoesNotContain(">", clean);
+        Assert.DoesNotContain("?", clean);
+        Assert.DoesNotContain("|", clean);
+        Assert.DoesNotContain("\"", clean);
+    }
+
+    [Fact]
+    public void Gate364_MediaFileNameTemplate_TruncatesExcessiveLength_PreservingFormat()
+    {
+        var longTitle = new string('A', 300);
+        var ctx = new MediaTemplateContext { Title = longTitle };
+
+        var formatted = MediaFileNameTemplateEngine.FormatFileName("{title}", ctx, maxLength: 50);
+
+        Assert.Equal(50, formatted.Length);
+        Assert.StartsWith("AAAA", formatted);
+    }
+}