feat(automod): render sticker, role & user names in moderation views

QoL lanjutan dari fix60084b3: content pesan mentah masih nampilin
snowflake (<@&roleid>, <@userid>, <:emoji:id>) di log moderasi dan
prompt LLM. Sekarang dirender ke nama yang bisa dibaca:

- Gateway capture: metadata menyimpan mentionedRoles + mentionedUsers
  (id+name) dari message.mentions, disimpan ke metadata JSON
- renderDiscordMentions(): <@&id> -> @RoleName, <@id> -> @Username,
  <:name:id> -> :name:, fallback @role/@user — dipakai di
  conversationContext (konteks LLM) dan moderationBuilders
  (getAnalysisContent) sehingga LLM lihat nama role/user beneran,
  bukan placeholder generik
- Frontend renderMessageContent() (mirror gateway) dipasang di semua
  tempat nampilin content: message-card, message-detail(-view),
  search-overlay, search-panel, users/channels section, live-stream,
  mod-queue, review list; sticker-only message tetap [Sticker: name],
  pesan teks+sticker kini ikut nampilin nama sticker
- tsc --noEmit PASS di gateway & frontend; renderDiscordMentions
  diverifikasi manual (6 kasus: role/user/emoji/unknown/plain)

services/frontend/src/components/dashboard/mod-queue.tsx

@@ -2,6 +2,7 @@
 
 import { AlertCircle, Check, Trash2 } from "lucide-react";
 import { GlassCard } from "@/components/glass/card";
+import { renderMessageContent } from "@/lib/format";
 import { cn } from "@/lib/utils";
 
 export interface ModQueueItem {
@@ -10,6 +11,7 @@ export interface ModQueueItem {
   username: string;
   severity: "low" | "medium" | "high" | "critical";
   reason: string;
+  metadata?: string | null;
 }
 
 export function ModQueue({ items = [] }: { items?: ModQueueItem[] }) {
@@ -56,7 +58,7 @@ export function ModQueue({ items = [] }: { items?: ModQueueItem[] }) {
                 </span>
               </div>
               <p className="text-xs text-text-secondary line-clamp-1">
-                {item.content}
+                {renderMessageContent(item.content, item.metadata)}
               </p>
               <p className="text-[10px] text-text-secondary/50">
                 {item.reason}