feat: support a multi-link list in the bookmark widget

A bookmark widget can now carry an optional links array instead of
a single href, rendering as a compact card with one row per link -
for grouping several quick links (e.g. "all services", "all Coolify
apps") into one widget instead of one card per link.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WpxhtQY3CExQdMs4j7MmJe

lib/config/schema.ts

@@ -6,12 +6,19 @@ const durationSchema = z
   .string()
   .regex(/^\d+(ms|s|m|h)$/, 'Expected a duration like "500ms", "5s", "1m", or "1h"');
 
+export const bookmarkLinkSchema = z.object({
+  name: z.string(),
+  href: z.string().url(),
+  icon: z.string().optional(),
+});
+
 export const bookmarkWidgetSchema = z.object({
   type: z.literal("bookmark"),
   name: z.string(),
-  href: z.string().url(),
+  href: z.string().url().optional(),
   description: z.string().optional(),
   icon: z.string().optional(),
+  links: z.array(bookmarkLinkSchema).optional(),
 });
 
 export const searchWidgetSchema = z.object({