fix: clarify OCI update dialog and distinguish cancellation

AppImage/lib/script-completion.ts

@@ -0,0 +1,14 @@
+// Native OCI `manage` reserves this code for an explicitly declined update.
+export const OCI_CANCELLED_EXIT_CODE = 6
+
+export function scriptCompletion(exitCode: number, cancelledExitCode?: number) {
+  if (exitCode === 0) return { kind: "success", color: "32" } as const
+  if (cancelledExitCode !== undefined && exitCode === cancelledExitCode) {
+    return { kind: "cancelled", color: "36" } as const
+  }
+  return { kind: "error", color: "31" } as const
+}
+
+export function shouldRefreshOciAfterCompletion(exitCode?: number) {
+  return exitCode !== OCI_CANCELLED_EXIT_CODE
+}