feat: add community marketplace for custom widgets and CSS

Adds a PocketBase-backed marketplace where users can share custom widgets
and CSS themes. Includes a Docusaurus storefront with GitHub OAuth login,
submission/voting/comments, and a PocketBase SQL view that computes author
names, vote counts, and comment counts without fragile hooks. The Next.js
app gets a modal browser for one-click install from the marketplace plus
clipboard paste-to-import on the custom widgets pages.

apps/nextjs/src/app/[locale]/boards/[name]/settings/_customCss.tsx

@@ -11,6 +11,7 @@ import { IconInfoCircle } from "@tabler/icons-react";
 import { useForm } from "@homarr/form";
 import { useI18n, useScopedI18n } from "@homarr/translation/client";
 
+import { InstallCssFromStoreButton } from "~/components/store-install/install-from-store-buttons";
 import type { Board } from "../../_types";
 import { useSavePartialSettingsMutation } from "./_shared";
 import classes from "./customcss.module.css";
@@ -45,7 +46,8 @@ export const CustomCssSettingsContent = ({ board }: Props) => {
           {customCssT("customClassesAlert.description")}
         </Alert>
 
-        <Group justify="end">
+        <Group justify="space-between">
+          <InstallCssFromStoreButton onSelect={(css) => form.setFieldValue("customCss", css)} />
           <Button type="submit" loading={isPending}>
             {t("common.action.saveChanges")}
           </Button>

apps/nextjs/src/app/[locale]/manage/custom-widgets/_copy-ai-prompt-button.tsx

@@ -1,5 +1,6 @@
 "use client";
 
+import { useEffect, useState } from "react";
 import { Button, Popover, Stack, Text } from "@mantine/core";
 import { useDisclosure } from "@mantine/hooks";
 import { IconCopy, IconSparkles } from "@tabler/icons-react";
@@ -296,8 +297,11 @@ interface CopyAiPromptButtonProps {
 export const CopyAiPromptButton = ({ rawResponse, currentConfig }: CopyAiPromptButtonProps) => {
   const t = useScopedI18n("customWidget");
   const [opened, { open, close }] = useDisclosure(false);
+  const [mounted, setMounted] = useState(false);
   const { data: schema, isLoading } = clientApi.customWidget.schema.useQuery();
 
+  useEffect(() => setMounted(true), []);
+
   const handleCopy = async () => {
     if (!schema) return;
     const prompt = buildAiPrompt(schema, rawResponse, currentConfig);
@@ -317,8 +321,8 @@ export const CopyAiPromptButton = ({ rawResponse, currentConfig }: CopyAiPromptB
           variant="light"
           leftSection={<IconSparkles size={16} />}
           onClick={open}
-          loading={isLoading}
-          disabled={!schema}
+          loading={!mounted || isLoading}
+          disabled={!mounted || isLoading || !schema}
           fullWidth
           size="sm"
         >

apps/nextjs/src/app/[locale]/manage/custom-widgets/_custom-widget-form.tsx

@@ -30,9 +30,11 @@ import { useScopedI18n } from "@homarr/translation/client";
 import type {
   CustomWidgetAuthType,
   CustomWidgetDisplayType,
+  CustomWidgetImport,
   CustomWidgetMethod,
   CustomWidgetSecretKind,
 } from "@homarr/validation/custom-widget";
+import { customWidgetImportSchema } from "@homarr/validation/custom-widget";
 import type { displayConfigSchema } from "@homarr/validation/custom-widget";
 import { JsonPathTreePicker } from "@homarr/widgets/_inputs/json-path-tree-picker";
 
@@ -467,6 +469,36 @@ const serverToFormFieldMap: Record<string, Record<string, string>> = {
   customJsx: { template: "template" },
 };
 
+const importToFormValues: Record<string, (config: Record<string, unknown>) => Record<string, unknown>> = {
+  singleValue: (c) => ({ jsonPath: c.jsonPath, label: c.label ?? "", unit: c.unit ?? "", valueSize: c.valueSize ?? "lg", labelPosition: c.labelPosition ?? "below" }),
+  keyValue: (c) => ({ mappings: (c.mappings as Array<Record<string, string>>)?.map((m) => ({ label: m.label, jsonPath: m.jsonPath, unit: m.unit ?? "" })) ?? [], kvLayout: c.layout ?? "list", kvColumns: c.columns ?? 2 }),
+  table: (c) => ({ tablePath: c.tablePath, columns: c.columns ?? [], striped: c.striped ?? true, compact: c.compact ?? false }),
+  statGrid: (c) => ({ statGridItems: c.items ?? [], statGridColumns: c.columns ?? 2, cardStyle: c.cardStyle ?? "filled" }),
+  progressBars: (c) => ({ progressBars: (c.bars as Array<Record<string, unknown>>)?.map((b) => ({ label: b.label ?? "", valuePath: b.valuePath ?? "", maxPath: b.maxPath ?? "", unit: b.unit ?? "", color: b.color ?? "blue" })) ?? [], showPercentage: c.showPercentage ?? true, barSize: c.barSize ?? "md" }),
+  statusIndicator: (c) => ({ statusItems: (c.items as Array<Record<string, unknown>>)?.map((i) => ({ label: i.label ?? "", jsonPath: i.jsonPath ?? "", goodValues: Array.isArray(i.goodValues) ? (i.goodValues as string[]).join(", ") : String(i.goodValues ?? "") })) ?? [], statusLayout: c.layout ?? "list", dotSize: c.dotSize ?? "md" }),
+  countGrid: (c) => ({ countGridItems: c.items ?? [], countGridColumns: c.columns ?? 2, countValueSize: c.valueSize ?? "md" }),
+  raw: (c) => ({ rawJsonPath: c.jsonPath ?? "$", rawMaxHeight: c.maxHeight ?? 300 }),
+  actionButton: (c) => ({ buttonLabel: c.buttonLabel ?? "", buttonColor: c.buttonColor ?? "blue", confirmText: c.confirmText ?? "", successMessage: c.successMessage ?? "" }),
+  customJsx: (c) => ({ template: c.template ?? "" }),
+};
+
+function importJsonToFormValues(imported: CustomWidgetImport): Partial<z.infer<typeof formSchema>> {
+  const displayFields = importToFormValues[imported.displayType]?.(imported.displayConfig as unknown as Record<string, unknown>) ?? {};
+  return {
+    name: imported.name,
+    description: imported.description ?? "",
+    iconUrl: imported.iconUrl ?? "",
+    url: imported.url,
+    authType: imported.authType,
+    headerName: imported.headerName ?? "",
+    method: imported.method,
+    requestBody: imported.requestBody ?? "",
+    displayType: imported.displayType,
+    ...displayFields,
+    secrets: [],
+  };
+}
+
 function extractServerErrors(err: unknown, displayType: string): Record<string, string> {
   const errors: Record<string, string> = {};
   const trpcErr = err as {
@@ -681,6 +713,25 @@ export function CustomWidgetForm({ mode, initialValues, definitionId }: CustomWi
     }
   }, [getPreviewInput, previewMutation]);
 
+  useEffect(() => {
+    if (mode !== "create") return;
+    const onPaste = (e: ClipboardEvent) => {
+      const raw = e.clipboardData?.getData("text/plain");
+      if (!raw) return;
+      let parsed: unknown;
+      try { parsed = JSON.parse(raw); } catch { return; }
+      const result = customWidgetImportSchema.safeParse(parsed);
+      if (!result.success) return;
+      e.preventDefault();
+      const formValues = importJsonToFormValues(result.data);
+      form.setValues({ ...defaultCreateValues, ...formValues });
+      form.clearErrors();
+      showSuccessNotification({ title: t("action.paste"), message: t("notification.imported" as never, { name: result.data.name }) });
+    };
+    document.addEventListener("paste", onPaste);
+    return () => document.removeEventListener("paste", onPaste);
+  }, [form, t, mode]);
+
   useEffect(() => {
     if (previewRefreshSignal > 0 && hasTestedRef.current) {
       void handlePreviewTest();

apps/nextjs/src/app/[locale]/manage/custom-widgets/_custom-widget-list.tsx

@@ -1,11 +1,16 @@
 "use client";
 
+import { useEffect } from "react";
 import { ActionIcon, Avatar, Badge, Group, Stack, Table, Text } from "@mantine/core";
 import { IconApi, IconPencil } from "@tabler/icons-react";
 
 import type { RouterOutputs } from "@homarr/api";
+import { clientApi } from "@homarr/api/client";
+import { revalidatePathActionAsync } from "@homarr/common/client";
+import { showErrorNotification, showSuccessNotification } from "@homarr/notifications";
 import { useScopedI18n } from "@homarr/translation/client";
 import { Link } from "@homarr/ui";
+import { customWidgetImportSchema } from "@homarr/validation/custom-widget";
 
 import { NoResults } from "~/components/no-results";
 import { CustomWidgetRowActions } from "./_custom-widget-actions";
@@ -31,6 +36,32 @@ interface CustomWidgetListProps {
 
 export const CustomWidgetList = ({ definitions }: CustomWidgetListProps) => {
   const t = useScopedI18n("customWidget");
+  const utils = clientApi.useUtils();
+  const importMutation = clientApi.customWidget.import.useMutation({
+    onSuccess: () => {
+      showSuccessNotification({ title: t("action.paste"), message: "Custom widget imported" });
+      void utils.customWidget.all.invalidate();
+      void revalidatePathActionAsync("/manage/custom-widgets");
+    },
+    onError: (err) => {
+      showErrorNotification({ title: t("action.paste"), message: err.message || "Failed to import" });
+    },
+  });
+
+  useEffect(() => {
+    const onPaste = (e: ClipboardEvent) => {
+      const raw = e.clipboardData?.getData("text/plain");
+      if (!raw) return;
+      let parsed: unknown;
+      try { parsed = JSON.parse(raw); } catch { return; }
+      const result = customWidgetImportSchema.safeParse(parsed);
+      if (!result.success) return;
+      e.preventDefault();
+      importMutation.mutate(result.data);
+    };
+    document.addEventListener("paste", onPaste);
+    return () => document.removeEventListener("paste", onPaste);
+  }, [importMutation]);
 
   if (definitions.length === 0) {
     return (

apps/nextjs/src/app/[locale]/manage/custom-widgets/page.tsx

@@ -9,6 +9,7 @@ import { Link } from "@homarr/ui";
 
 import { ManagePageLayout } from "~/components/manage/manage-page-layout";
 import { MobileAffixButton } from "~/components/manage/mobile-affix-button";
+import { InstallWidgetFromStoreButton } from "~/components/store-install/install-from-store-buttons";
 import { CustomWidgetBetaBanner } from "./_beta-banner";
 import { ImportCustomWidgetButton } from "./_custom-widget-actions";
 import { CustomWidgetList } from "./_custom-widget-list";
@@ -28,6 +29,7 @@ export default async function CustomWidgetsPage() {
       title={t("page.list.title")}
       primaryAction={
         <Group gap="xs">
+          <InstallWidgetFromStoreButton />
           <ImportCustomWidgetButton />
           <MobileAffixButton component={Link} href="/manage/custom-widgets/new" leftSection={<IconPlus size={16} />}>
             {t("action.create")}