feat: Add metro transit, gadgets, shop, social apps, and traffic models checkpoint

Ananta.SDK/Logging/RuntimeLogs.cs

@@ -214,9 +214,18 @@ public static class RuntimeLogs
     {
         lock (FileLock)
         {
-            if (!string.IsNullOrWhiteSpace(latest)) AppendText(latest, text);
-            if (!string.IsNullOrWhiteSpace(archive) && !string.Equals(latest, archive, StringComparison.OrdinalIgnoreCase))
-                AppendText(archive, text);
+            // Logging is best-effort: a log file held/locked by another process (a viewer,
+            // the Node proxy, an indexer) must never throw into the RPC pipeline and kill
+            // a live session (that exact path caused a client "connection lost" on 2026-09-19).
+            try
+            {
+                if (!string.IsNullOrWhiteSpace(latest)) AppendText(latest, text);
+                if (!string.IsNullOrWhiteSpace(archive) && !string.Equals(latest, archive, StringComparison.OrdinalIgnoreCase))
+                    AppendText(archive, text);
+            }
+            catch
+            {
+            }
         }
     }