Generalize writing system font patch to include vernacular (#2141)

The font patch method was only handling Analysis writing systems, but Vernacular writing systems also use different fonts on Windows. Renamed and updated the method to patch all writing systems to ensure consistent snapshot verification across platforms.

https://claude.ai/code/session_fx7MS

Co-authored-by: Claude <noreply@anthropic.com>

Author: myieye

backend/FwLite/FwLiteProjectSync.Tests/Sena3SyncTests.cs

@@ -218,10 +218,10 @@ public async Task LiveSena3Sync()
         await using var liveScope = _project.Services.CreateAsyncScope();
         var liveCrdtApi = await liveScope.ServiceProvider.OpenCrdtProject(liveCrdtProject);
 
-        // The default font used for the Analysis writing systems in our Sena 3 project differs when opened on
+        // The default fonts used for writing systems in our Sena 3 project differ when opened on
         // Windows versus Linux. So, we standardize them to Charis SIL (which is the default on Linux).
         // Otherwise, the snapshot verification isn't consistent.
-        await PatchAnalysisWsFontsWithCharisSIL(_fwDataApi);
+        await PatchAllWsFontsWithCharisSIL(_fwDataApi);
 
         // act
         var result = await _syncService.Sync(liveCrdtApi, _fwDataApi);
@@ -259,15 +259,23 @@ await Verify(JsonSerializer.Serialize(fwHeadlessSnapshot, IndentedDefaultJsonOpt
         result.FwdataChanges.Should().Be(0);
     }
 
-    private async Task PatchAnalysisWsFontsWithCharisSIL(FwDataMiniLcmApi fwDataApi)
+    private async Task PatchAllWsFontsWithCharisSIL(FwDataMiniLcmApi fwDataApi)
     {
         var writingSystems = await fwDataApi.GetWritingSystems();
-        var analysisWs = writingSystems.Analysis;
-        analysisWs.Length.Should().Be(2);
-        await fwDataApi.UpdateWritingSystem(analysisWs[0].WsId, WritingSystemType.Analysis,
-            new UpdateObjectInput<WritingSystem>().Set(ws => ws.Font, "Charis SIL"));
-        await fwDataApi.UpdateWritingSystem(analysisWs[1].WsId, WritingSystemType.Analysis,
-            new UpdateObjectInput<WritingSystem>().Set(ws => ws.Font, "Charis SIL"));
+
+        // Patch all Analysis writing systems
+        foreach (var ws in writingSystems.Analysis)
+        {
+            await fwDataApi.UpdateWritingSystem(ws.WsId, WritingSystemType.Analysis,
+                new UpdateObjectInput<WritingSystem>().Set(w => w.Font, "Charis SIL"));
+        }
+
+        // Patch all Vernacular writing systems
+        foreach (var ws in writingSystems.Vernacular)
+        {
+            await fwDataApi.UpdateWritingSystem(ws.WsId, WritingSystemType.Vernacular,
+                new UpdateObjectInput<WritingSystem>().Set(w => w.Font, "Charis SIL"));
+        }
     }
 
     private static string RelativePath(string name, [CallerFilePath] string sourceFile = "")