Make save button disappear on save

Fixes a bug where often the "Save" button wouldn't disappear as expected the first time you clicked it.

src/components/OutputsTable/VariantEditor.tsx

@@ -5,7 +5,8 @@ import { type PromptVariant } from "./types";
 import { api } from "~/utils/api";
 import { useAppStore } from "~/state/store";
 import { editorBackground } from "~/state/sharedVariantEditor.slice";
-export default function VariantConfigEditor(props: { variant: PromptVariant }) {
+
+export default function VariantEditor(props: { variant: PromptVariant }) {
   const monaco = useAppStore.use.sharedVariantEditor.monaco();
   const editorRef = useRef<ReturnType<NonNullable<typeof monaco>["editor"]["create"]> | null>(null);
   const [editorId] = useState(() => `editor_${Math.random().toString(36).substring(7)}`);
@@ -17,10 +18,12 @@ export default function VariantConfigEditor(props: { variant: PromptVariant }) {
 
   const checkForChanges = useCallback(() => {
     if (!editorRef.current) return;
-    const currentConfig = editorRef.current.getValue();
-    setIsChanged(currentConfig !== lastSavedFn);
+    const currentFn = editorRef.current.getValue();
+    setIsChanged(currentFn.length > 0 && currentFn !== lastSavedFn);
   }, [lastSavedFn]);
 
+  useEffect(checkForChanges, [checkForChanges, lastSavedFn]);
+
   const replaceVariant = api.promptVariants.replaceVariant.useMutation();
   const utils = api.useContext();
   const toast = useToast();
@@ -75,9 +78,9 @@ export default function VariantConfigEditor(props: { variant: PromptVariant }) {
       });
     }
 
-    await utils.promptVariants.list.invalidate();
+    setIsChanged(false);
 
-    checkForChanges();
+    await utils.promptVariants.list.invalidate();
   }, [checkForChanges]);
 
   useEffect(() => {

src/components/OutputsTable/index.tsx

@@ -3,7 +3,7 @@ import { api } from "~/utils/api";
 import NewScenarioButton from "./NewScenarioButton";
 import NewVariantButton from "./NewVariantButton";
 import ScenarioRow from "./ScenarioRow";
-import VariantConfigEditor from "./VariantEditor";
+import VariantEditor from "./VariantEditor";
 import VariantHeader from "./VariantHeader";
 import { cellPadding } from "../constants";
 import { BsPencil } from "react-icons/bs";
@@ -94,7 +94,7 @@ export default function OutputsTable({ experimentId }: { experimentId: string |
 
       {variants.data.map((variant) => (
         <GridItem key={variant.uiId}>
-          <VariantConfigEditor variant={variant} />
+          <VariantEditor variant={variant} />
         </GridItem>
       ))}
       {variants.data.map((variant) => (