perf: cut cold route compilation and unblock preview images (#6441)

packages/widgets/src/prefetch.ts

@@ -1,26 +1,20 @@
-import { cache } from "react";
 import type { QueryClient } from "@tanstack/react-query";
 
-import { db } from "@homarr/db";
-import { getServerSettingsAsync } from "@homarr/db/queries";
+import { getRscServerSettingsAsync } from "@homarr/api/server-settings-server";
 import type { WidgetKind } from "@homarr/definitions";
 import { createSettings } from "@homarr/settings/creator";
 
-import { reduceWidgetOptionsWithDefaultValues } from ".";
+import { loadWidgetDefinition, reduceWidgetOptionsWithDefinition } from "./manifest";
 import prefetchForApps from "./app/prefetch";
 import prefetchForBookmarks from "./bookmarks/prefetch";
-import prefetchForDownloads from "./downloads/prefetch";
 import type { Prefetch, WidgetOptionsRecordOf } from "./definition";
 import type { inferOptionsFromCreator } from "./options";
 
-const cachedGetServerSettingsAsync = cache(getServerSettingsAsync);
-
 const prefetchCallbacks: Partial<{
   [TKind in WidgetKind]: Prefetch<TKind>;
 }> = {
   bookmarks: prefetchForBookmarks,
   app: prefetchForApps,
-  downloads: prefetchForDownloads,
 };
 
 export const prefetchForKindAsync = async <TKind extends WidgetKind>(
@@ -36,11 +30,15 @@ export const prefetchForKindAsync = async <TKind extends WidgetKind>(
     return;
   }
 
-  const serverSettings = await cachedGetServerSettingsAsync(db);
+  const [serverSettings, definition] = await Promise.all([getRscServerSettingsAsync(), loadWidgetDefinition(kind)]);
 
   const itemsWithDefaultOptions = items.map((item) => ({
     ...item,
-    options: reduceWidgetOptionsWithDefaultValues(kind, createSettings({ user: null, serverSettings }), item.options),
+    options: reduceWidgetOptionsWithDefinition(
+      definition,
+      createSettings({ user: null, serverSettings }),
+      item.options,
+    ),
   }));
 
   await callback(queryClient, itemsWithDefaultOptions as never[]);