nix templates: factor harness-base.nix (shared scaffolding incl. gitconfig)

hive-sh4re/src/lib.rs

@@ -218,7 +218,9 @@ pub enum ManagerRequest {
     Status,
     /// Operator-injected message TO the manager (from the manager's own web
     /// UI). Same shape as `AgentRequest::OperatorMsg`.
-    OperatorMsg { body: String },
+    OperatorMsg {
+        body: String,
+    },
     /// Submit a spawn request for the user to approve. On approval the host
     /// creates and starts the container. Brand-new agent names only — if an
     /// agent of the same name already exists, the approval will fail.