fix(web): move autosave hooks above early return (React #310)

web/app/workflows/[id]/page.tsx

@@ -105,14 +105,35 @@ export default function WorkflowBuilder() {
         // eslint-disable-next-line react-hooks/exhaustive-deps
     }, [secretGroups]);
 
-    if (!wf) {
-        return <div className="p-8 text-text-secondary">Loading…</div>;
-    }
-
     // Keep a ref to the latest workflow so an in-flight save can tell whether
     // the user edited again while the request was on the wire.
     wfRef.current = wf;
 
+    // Autosave: debounce 800ms after any change to the workflow (step added,
+    // removed, reordered, or edited) and persist. Diffing the serialized state
+    // against the last saved snapshot skips no-op saves and the initial load.
+    // Must stay above the early return below so hook order is stable.
+    useEffect(() => {
+        if (!wf || savedSnapshotRef.current === null) return;
+        if (JSON.stringify(wf) === savedSnapshotRef.current) return;
+        const t = setTimeout(() => {
+            save();
+        }, 800);
+        return () => clearTimeout(t);
+        // eslint-disable-next-line react-hooks/exhaustive-deps
+    }, [wf]);
+
+    // Re-render every 15s so the "Saved … ago" label stays current.
+    useEffect(() => {
+        if (!lastSaved) return;
+        const iv = setInterval(() => setTick((n) => n + 1), 15000);
+        return () => clearInterval(iv);
+    }, [lastSaved]);
+
+    if (!wf) {
+        return <div className="p-8 text-text-secondary">Loading…</div>;
+    }
+
     const libById = (sid?: string) => (sid ? library?.find((l) => l.step_id === sid) : undefined);
 
     const sortedSteps = [...wf.steps].sort((a, b) => a.order - b.order);
@@ -162,26 +183,6 @@ export default function WorkflowBuilder() {
         }
     };
 
-    // Autosave: debounce 800ms after any change to the workflow (step added,
-    // removed, reordered, or edited) and persist. Diffing the serialized state
-    // against the last saved snapshot skips no-op saves and the initial load.
-    useEffect(() => {
-        if (!wf || savedSnapshotRef.current === null) return;
-        if (JSON.stringify(wf) === savedSnapshotRef.current) return;
-        const t = setTimeout(() => {
-            save();
-        }, 800);
-        return () => clearTimeout(t);
-        // eslint-disable-next-line react-hooks/exhaustive-deps
-    }, [wf]);
-
-    // Re-render every 15s so the "Saved … ago" label stays current.
-    useEffect(() => {
-        if (!lastSaved) return;
-        const iv = setInterval(() => setTick((n) => n + 1), 15000);
-        return () => clearInterval(iv);
-    }, [lastSaved]);
-
     const run = async () => {
         setRunning(true);
         setError(null);