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/analysis/search-panel.tsx

@@ -13,7 +13,7 @@ import { Input } from "@/components/ui/input";
 import { Progress } from "@/components/ui/progress";
 import { useReanalyze } from "@/hooks";
 import { messagesApi } from "@/lib/api";
-import { safeParseJsonArray } from "@/lib/format";
+import { renderMessageContent, safeParseJsonArray } from "@/lib/format";
 import type { MessageRecord } from "@/lib/types";
 import { cn } from "@/lib/utils";
 
@@ -100,7 +100,7 @@ export function SearchPanel() {
                             </Badge>
                           )}
                         </div>
-                        <p className="text-sm leading-relaxed">{msg.content}</p>
+                        <p className="text-sm leading-relaxed">{renderMessageContent(msg.content, msg.metadata)}</p>
                         {msg.ai_moderation_flags &&
                           msg.ai_moderation_flags !== "[]" && (
                             <div className="flex flex-wrap gap-1">