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/SubtitleFormatConverterGateTests.cs

@@ -0,0 +1,63 @@
+using System;
+using Paca.Mobile.Core;
+using Xunit;
+
+namespace Paca.Tests.Core;
+
+public class SubtitleFormatConverterGateTests
+{
+    [Fact]
+    public void Gate345_SubtitleFormatConverter_ConvertsSrtToVtt_Correctly()
+    {
+        var srt = @"1
+00:00:01,234 --> 00:00:04,567
+Hello world!
+
+2
+00:00:05,000 --> 00:00:08,100
+Welcome to Paca.";
+
+        var vtt = SubtitleFormatConverter.ConvertSrtToVtt(srt);
+
+        Assert.StartsWith("WEBVTT", vtt.TrimStart());
+        Assert.Contains("00:00:01.234 --> 00:00:04.567", vtt);
+        Assert.Contains("00:00:05.000 --> 00:00:08.100", vtt);
+        Assert.DoesNotContain(",234", vtt);
+    }
+
+    [Fact]
+    public void Gate346_SubtitleFormatConverter_ConvertsVttToSrt_Correctly()
+    {
+        var vtt = @"WEBVTT
+
+00:00:01.234 --> 00:00:04.567
+Hello world!
+
+00:00:05.000 --> 00:00:08.100
+Welcome to Paca.";
+
+        var srt = SubtitleFormatConverter.ConvertVttToSrt(vtt);
+
+        Assert.DoesNotContain("WEBVTT", srt);
+        Assert.Contains("1\n00:00:01,234 --> 00:00:04,567", srt.Replace("\r\n", "\n"));
+        Assert.Contains("00:00:01,234 --> 00:00:04,567", srt);
+        Assert.Contains("00:00:05,000 --> 00:00:08,100", srt);
+    }
+
+    [Fact]
+    public void Gate347_SubtitleFormatConverter_StripsFormattingTags_Cleanly()
+    {
+        var formatted = "<b>Hello</b> <i><font color=\"#ff0000\">World</font></i> & enjoy!";
+        var clean = SubtitleFormatConverter.StripFormattingTags(formatted);
+
+        Assert.Equal("Hello World & enjoy!", clean);
+    }
+
+    [Fact]
+    public void Gate348_SubtitleFormatConverter_HandlesEmptyAndWhitespaceGracefully()
+    {
+        Assert.Equal(string.Empty, SubtitleFormatConverter.ConvertSrtToVtt(string.Empty));
+        Assert.Equal(string.Empty, SubtitleFormatConverter.ConvertVttToSrt(string.Empty));
+        Assert.Equal(string.Empty, SubtitleFormatConverter.StripFormattingTags(string.Empty));
+    }
+}