Filter out current variable from autocomplete and show sub environment variables in base environment autocomplete

src-web/components/core/PairEditor.util.tsx

@@ -0,0 +1,10 @@
+import { generateId } from '../../lib/generateId';
+import type { Pair, PairWithId } from './PairEditor';
+
+export function ensurePairId(p: Pair): PairWithId {
+  if (typeof p.id === 'string') {
+    return p as PairWithId;
+  } else {
+    return { ...p, id: p.id ?? generateId() };
+  }
+}