refactor: remove voice/recording/media features from frontend + prune lockfiles

- Delete pages: (dashboard)/{recordings,voice,media}/ incl. view.tsx
- Delete components/{voice,media}, hooks/{use-voice,use-recordings,use-media},
  lib/audio/ (mic-transmit, pcm-player, wav), api/{voice,recordings,media},
  types/{voice,recording,media}, lib/hash.ts
- Cut nav tiles (Active Voice Stages, Voice Recording Archive) from dashboard,
  MiniPlayer from ambient-app, hooks/types barrel exports, WS voice/media events
- Re-home guilds + textChannels to messages oRPC router (DB-derived) so the
  messages page picker keeps working; guild-picker simplified to text-only
- Clean Channel/AppConfig types of voice remnants
- Delete infra/docker/recordings/ + 11 voice/recording/video spec docs
- pnpm install: prune direct voice deps from gateway + backend lockfiles
  (prism-media/opusscript remain only as transitive discord.js deps)

services/frontend/src/lib/api/messages.ts

@@ -1,13 +1,20 @@
 import { orpc } from "@/lib/orpc/client";
 import type {
   AttachmentRecord,
+  Channel,
   EditHistoryRow,
+  Guild,
   MessageActivityBucket,
   MessageRecord,
   SemanticSearchResult,
 } from "@/lib/types";
 
 export const messagesApi = {
+  getGuilds: () => orpc.messages.guilds() as unknown as Promise<Guild[]>,
+
+  getTextChannels: (guildId: string) =>
+    orpc.messages.textChannels({ guildId }) as unknown as Promise<Channel[]>,
+
   list: (
     guildId: string,
     limit?: number,