refactor(board): modernize item and application select modals with SelectableCard (#6642)

Modernize board item, application, and integration selection flows with shared Mantine components, batch board actions, improved accessibility, and hardened persistence.

packages/definitions/src/docs/homarr-docs-sitemap.ts

@@ -336,7 +336,6 @@ export type HomarrDocumentationPath =
   | "/docs/integrations/whats-up-docker"
   | "/docs/widgets/clock"
   | "/docs/widgets/weather"
-  | "/docs/widgets/today"
   | "/docs/widgets/air-quality"
   | "/docs/widgets/countdown"
   | "/docs/widgets/timer"

packages/definitions/src/docs/widget-doc-slugs.ts

@@ -3,7 +3,6 @@ import type { WidgetKind } from "../widget";
 export const widgetDocSlugs: Record<WidgetKind, string | null> = {
   clock: "clock",
   weather: "weather",
-  today: "today",
   airQuality: "air-quality",
   countdown: "countdown",
   timer: "timer",