fix: scope polling to widgets, fix retry, guard dates, throttle umami

- Remove global refetchInterval; scope to widget queries via setQueryDefaults
- Fix error boundary retry: correct queryKey to [["widget"]], move invalidation to onReset
- Add toValidDate() helper in @homarr/common for cache hydration safety
- Guard date formatting in media-releases and media-requests against non-Date values
- Set umami refetchInterval to 60s via shared umamiQueryOptions constant
- Simplify dns-hole mutations to invalidate() instead of manual optimistic setData

apps/nextjs/src/components/board/items/item-content.tsx

@@ -1,6 +1,6 @@
 import { Badge, Card } from "@mantine/core";
 import { useElementSize } from "@mantine/hooks";
-import { QueryErrorResetBoundary } from "@tanstack/react-query";
+import { QueryErrorResetBoundary, useQueryClient } from "@tanstack/react-query";
 import combineClasses from "clsx";
 import { NoIntegrationSelectedError } from "@homarr/widgets/errors/classes";
 import { ErrorBoundary } from "react-error-boundary";
@@ -98,12 +98,16 @@ const InnerContent = ({ item, ...dimensions }: InnerContentProps) => {
     updateItemOptions({ itemId: item.id, newOptions });
   const widgetSupportsIntegrations =
     "supportedIntegrations" in definition && definition.supportedIntegrations.length >= 1;
+  const queryClient = useQueryClient();
 
   return (
     <QueryErrorResetBoundary>
       {({ reset }) => (
         <ErrorBoundary
-          onReset={reset}
+          onReset={() => {
+            void queryClient.invalidateQueries({ queryKey: [["widget"]] });
+            reset();
+          }}
           fallbackRender={({ resetErrorBoundary, error }) => (
             <>
               <BoardItemMenu offset={4} item={newItem} resetErrorBoundary={resetErrorBoundary} />