Client: diagrams in local folders (setting)

Co-Authored-By: Claude Opus 5.5 <[email protected]>

Client/Core.py

@@ -190,6 +190,9 @@ class AppConfig:
     # Double-click on a file: True opens it in SaraView's own viewer, False
     # hands it to the system's default program. The menu always offers the other.
     OpenFilesInApp: bool = True
+    # Draw ```mermaid diagrams in local folders (LocalDiagrams.py); off removes
+    # what it downloaded. On a server, the server draws them either way.
+    LocalDiagrams: bool = True
 
     def Save(self) -> None:
         ConfigDir.mkdir(parents=True, exist_ok=True)