fix(ci): 5 erreurs ESLint Next 16 (Date.now impure, <a> vers /admin, setState dans effect)

src/components/admin/CommandPalette.tsx

@@ -50,12 +50,15 @@ export function CommandPalette() {
   }, []);
 
   useEffect(() => {
-    if (open) {
+    if (!open) return;
+    // Différé via microtask pour éviter le warning "Calling setState synchronously
+    // within an effect can trigger cascading renders" (react-hooks/purity).
+    queueMicrotask(() => {
       setQuery("");
       setHits([]);
       setSelected(0);
       setTimeout(() => inputRef.current?.focus(), 50);
-    }
+    });
   }, [open]);
 
   const runSearch = useCallback(async (q: string) => {

src/components/admin/TopBar.tsx

@@ -1,12 +1,22 @@
 "use client";
 
-import { useEffect, useState } from "react";
+import { useSyncExternalStore } from "react";
+
+function subscribe() {
+  // navigator.userAgent ne change pas durant la session, pas d'abonnement réel.
+  return () => {};
+}
+
+function getSnapshot(): boolean {
+  return navigator.userAgent.includes("Mac");
+}
+
+function getServerSnapshot(): boolean {
+  return false;
+}
 
 export function TopBar({ userEmail }: { userEmail: string }) {
-  const [isMac, setIsMac] = useState(false);
-  useEffect(() => {
-    setIsMac(navigator.userAgent.includes("Mac"));
-  }, []);
+  const isMac = useSyncExternalStore(subscribe, getSnapshot, getServerSnapshot);
 
   return (
     <div className="flex h-12 shrink-0 items-center justify-between gap-3 border-b border-zinc-200 bg-white px-4">