Defer OpenCode restarts for config mutations

Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>

packages/vscode/src/config-mutation-response.ts

@@ -0,0 +1,16 @@
+/**
+ * Shared response shape for OpenCode config mutations.
+ *
+ * Settings writes persist to disk immediately but defer the OpenCode restart
+ * so the UI can accumulate pending changes and apply them once via
+ * api:config/reload ("Apply & Restart OpenCode").
+ */
+export function buildDeferredRestartResponse(message: string) {
+  return {
+    success: true,
+    requiresReload: false,
+    requiresRestart: true,
+    restartDeferred: true,
+    message,
+  };
+}