fix(word): reject tracked changes inside hyperlinks

Clippit.Tests/Word/RevisionProcessorTests.cs

@@ -1,6 +1,9 @@
 // Copyright (c) Microsoft. All rights reserved.
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
+using System.Xml.Linq;
 using Clippit.Word;
+using DocumentFormat.OpenXml;
+using DocumentFormat.OpenXml.Packaging;
 
 namespace Clippit.Tests.Word;
 
@@ -102,5 +105,53 @@ public void RP001(string name)
         if (rejectedRevisions.Any())
             Assert.Fail($"Regression: Rejected output differs from baseline for {name}");
     }
+
+    [Test]
+    [Arguments(false, "Alpha delta gamma")]
+    [Arguments(true, "Alpha beta gamma")]
+    public async Task RP053_RevisionsInsideHyperlink(bool reject, string expectedText)
+    {
+        var source = CreateDocument(
+            """
+            <w:p>
+              <w:hyperlink w:anchor="Target">
+                <w:r><w:t xml:space="preserve">Alpha </w:t></w:r>
+                <w:del w:id="1" w:author="Author" w:date="2026-10-15T00:00:00Z">
+                  <w:r><w:delText>beta</w:delText></w:r>
+                </w:del>
+                <w:ins w:id="2" w:author="Author" w:date="2026-10-15T00:00:00Z">
+                  <w:r><w:t>delta</w:t></w:r>
+                </w:ins>
+                <w:r><w:t xml:space="preserve"> gamma</w:t></w:r>
+              </w:hyperlink>
+            </w:p>
+            <w:p><w:bookmarkStart w:id="0" w:name="Target"/><w:r><w:t>Target</w:t></w:r><w:bookmarkEnd w:id="0"/></w:p>
+            """
+        );
+
+        var processed = reject ? RevisionProcessor.RejectRevisions(source) : RevisionProcessor.AcceptRevisions(source);
+
+        using var streamDoc = new OpenXmlMemoryStreamDocument(processed);
+        using var doc = streamDoc.GetWordprocessingDocument();
+        await Validate(doc);
+        await Assert.That(RevisionProcessor.HasTrackedRevisions(doc)).IsFalse();
+        var hyperlink = doc.MainDocumentPart!.GetXDocument().Descendants(W.hyperlink).Single();
+        await Assert.That(TextOf(hyperlink)).IsEqualTo(expectedText);
+    }
+
+    private static WmlDocument CreateDocument(string bodyXml)
+    {
+        using var stream = new MemoryStream();
+        using (var doc = WordprocessingDocument.Create(stream, WordprocessingDocumentType.Document))
+        {
+            var mainPart = doc.AddMainDocumentPart();
+            mainPart.PutXDocument(
+                XDocument.Parse($"<w:document xmlns:w=\"{W.w.NamespaceName}\"><w:body>{bodyXml}</w:body></w:document>")
+            );
+        }
+        return new WmlDocument("RevisionProcessorTest.docx", stream.ToArray());
+    }
+
+    private static string TextOf(XElement element) => string.Concat(element.Descendants(W.t).Select(t => t.Value));
 }
 #pragma warning restore CA1707

Clippit/Word/RevisionProcessor.cs

@@ -380,9 +380,12 @@ private static object ReverseRevisionsTransform(XNode node, ReverseRevisionsInfo
         {
             if (node is not XElement element)
                 return node;
+            // Run-level revisions may be wrapped in these containers; they belong to the enclosing paragraph.
             var parent = element
                 .Ancestors()
-                .FirstOrDefault(a => a.Name != W.sdtContent && a.Name != W.sdt && a.Name != W.smartTag);
+                .FirstOrDefault(a =>
+                    a.Name != W.sdtContent && a.Name != W.sdt && a.Name != W.smartTag && a.Name != W.hyperlink
+                );
 
             ////////////////////////////////////////////////////////////////////////////////////
             // Deleted run