perf: memo GridCard, fuse save fns, fix slash tab active color

memento-note/hooks/use-cookie-consent.ts

@@ -5,6 +5,7 @@ import {
   CONSENT_CHANGE_EVENT,
   getConsent,
   hasConsentChoice,
+  loadConsentWithDBSync,
   type ConsentRecord,
 } from '@/lib/consent/cookie-consent'
 
@@ -12,8 +13,10 @@ export function useCookieConsent() {
   const [consent, setConsentState] = useState<ConsentRecord | null>(null)
   const [ready, setReady] = useState(false)
 
-  const refresh = useCallback(() => {
-    setConsentState(getConsent())
+  const refresh = useCallback(async () => {
+    // Try local first, then DB sync for authenticated users
+    const loaded = await loadConsentWithDBSync()
+    setConsentState(loaded)
     setReady(true)
   }, [])