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/messages/en.json

@@ -21,7 +21,19 @@
     "optional": "Optional",
     "searchSelect": "Search and select…",
     "noResults": "No results",
-    "clearSelection": "Clear selection"
+      "clearSelection": "Clear selection"
+  },
+  "embedBuilder": {
+    "title": "Title",
+    "titlePlaceholder": "Welcome!",
+    "description": "Description",
+    "descriptionPlaceholder": "Glad you're here, {user}.",
+    "color": "Color",
+    "preview": "Preview",
+    "previewTitlePlaceholder": "Embed title",
+    "previewDescriptionPlaceholder": "Embed description appears here…",
+    "clear": "Clear embed",
+    "clearHint": "Empty fields do not save an embed."
   },
   "nav": {
     "dashboard": "Dashboard",
@@ -276,7 +288,7 @@
       "welcomeContent": "Message content",
       "contentPlaceholder": "Welcome {user} to {server}!",
       "placeholdersHint": "Available placeholders: {user}, {user.name}, {user.tag}, {user.id}, {server}, {memberCount}",
-      "welcomeEmbed": "Embed (JSON, optional)",
+      "welcomeEmbed": "Embed",
       "welcomeDmEnabled": "Welcome DM enabled",
       "dmContentPlaceholder": "Optional private message to new members",
       "userAutoroles": "Autoroles for users",
@@ -288,7 +300,7 @@
       "leaveEnabledLabel": "Leave message enabled",
       "leaveChannelId": "Leave channel ID",
       "leaveContent": "Message content",
-      "leaveEmbed": "Embed (JSON, optional)"
+      "leaveEmbed": "Embed"
     },
     "verification": {
       "title": "Verification",
@@ -461,7 +473,9 @@
       },
       "triggerWord": "Trigger word (optional)",
       "content": "Content",
-      "allowedRoleIds": "Allowed role IDs",
+      "embed": "Embed",
+      "embedRequired": "Embed tags need a title or description.",
+      "allowedRoleIds": "Allowed roles",
       "allowedChannelIds": "Allowed channel IDs",
       "idsPlaceholder": "One or more IDs, comma-separated",
       "create": "Create tag",
@@ -562,10 +576,11 @@
       "cron": "Cron expression",
       "runAt": "Run at",
       "content": "Message content",
-      "cronHint": "Set a cron expression for recurring messages, or a one-time date/time - not both.",
+      "embed": "Embed (optional)",
+      "cronHint": "Set a cron expression for recurring messages, or a one-time date/time - not both. Text and/or embed is required.",
       "create": "Schedule message",
       "created": "Message scheduled.",
-      "formIncomplete": "Please fill in the channel, content and either a cron expression or a date/time.",
+      "formIncomplete": "Please fill channel, content or embed, and either a cron expression or a date/time.",
       "confirmDelete": "Really delete this schedule?",
       "listTitle": "Scheduled messages",
       "listDescription": "Upcoming and recurring scheduled messages.",