SaraView: install the variable engine with the client

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

Programs/SaraView/Manifest.toml

@@ -6,7 +6,8 @@ Description = "SaraView's desktop client: view and edit files in a local folder,
 [Source]
 Git = "{GitHost}/SaraView"
 # Only the Flet client; the server (Backend/, Frontend/) runs in Docker on SpineS.
-Include = ["Client/*.py", "Client/requirements.txt", "Client/assets/**"]
+# Backend/VarEngine.py is the variable engine the client shares with it.
+Include = ["Client/*.py", "Client/requirements.txt", "Client/assets/**", "Backend/VarEngine.py"]
 Exclude = ["Client/Packaging"]
 
 [Python]