Enhance embed functionality across scheduler and welcome components

- Updated SchedulerManager and WelcomeForm to integrate DiscordEmbedBuilder for managing embeds, replacing JSON text areas with a more user-friendly interface.
- Modified data handling in the scheduler and welcome configurations to support embed structures, ensuring proper parsing and validation.
- Updated localization files to reflect changes in embed handling, improving user guidance and clarity in both English and German.
- Enhanced validation schemas to require embed titles or descriptions where necessary, ensuring robust data integrity.

apps/webui/src/lib/module-configs/scheduler.ts

@@ -1,5 +1,5 @@
-import type { ScheduledMessageDashboard, ScheduledMessageDashboardCreate } from '@nexumi/shared';
-import type { ScheduledMessage } from '@prisma/client';
+import type { ScheduledMessageDashboard, ScheduledMessageDashboardCreate, WelcomeEmbed } from '@nexumi/shared';
+import { Prisma, type ScheduledMessage } from '@prisma/client';
 import { prisma } from '../prisma';
 import { getScheduleQueue } from '../queues';
 
@@ -9,12 +9,27 @@ export class SchedulerValidationError extends Error {
   }
 }
 
+function parseEmbed(raw: unknown): WelcomeEmbed | null {
+  if (!raw || typeof raw !== 'object' || Array.isArray(raw)) {
+    return null;
+  }
+  const record = raw as Record<string, unknown>;
+  const title = typeof record.title === 'string' ? record.title : undefined;
+  const description = typeof record.description === 'string' ? record.description : undefined;
+  const color = typeof record.color === 'number' ? record.color : undefined;
+  if (!title && !description && color === undefined) {
+    return null;
+  }
+  return { title, description, color };
+}
+
 function toDashboard(schedule: ScheduledMessage): ScheduledMessageDashboard {
   return {
     id: schedule.id,
     channelId: schedule.channelId,
     creatorId: schedule.creatorId,
     content: schedule.content,
+    embed: parseEmbed(schedule.embed),
     rolePingId: schedule.rolePingId,
     cron: schedule.cron,
     runAt: schedule.runAt?.toISOString() ?? null,
@@ -69,6 +84,10 @@ export async function createScheduledMessageDashboard(
       channelId: input.channelId,
       creatorId,
       content: input.content?.trim() || null,
+      embed:
+        input.embed === undefined || input.embed === null
+          ? Prisma.JsonNull
+          : (input.embed as Prisma.InputJsonValue),
       rolePingId: input.rolePingId || null,
       cron,
       runAt