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/ws/types.ts

@@ -1,10 +1,4 @@
-import type {
-  ActiveSpeaker,
-  MediaState,
-  MessageRecord,
-  ModerationAction,
-  VoiceRecording,
-} from "@/lib/types";
+import type { MessageRecord, ModerationAction } from "@/lib/types";
 
 // ── Connection Status ──────────────────────────────────────
 
@@ -46,19 +40,6 @@ export interface WsEventMap {
   message_snapshot_end: { sent: number; error?: boolean };
   attachment_created: unknown;
   attachment_uploaded: unknown;
-  voice_recording_started: unknown;
-  voice_recording_stopped: unknown;
-  voice_recording_uploaded: VoiceRecording;
-  voice_active_user: ActiveSpeaker;
-  /**
-   * Authoritative shared live-voice snapshot — `{ activeSpeakers: [...] }`.
-   * The backend sends this on WS connect (initial state) and clients replace
-   * their local list wholesale so every user converges on the same state.
-   */
-  voice_state: { activeSpeakers: ActiveSpeaker[] };
-  /** NOT delivered as JSON — arrives only via onPcm() binary handler as PcmChunk */
-  voice_pcm_data: never;
-  voice_analyzed: unknown;
   analysis_queue_status: unknown;
   reaction_added: unknown;
   reaction_removed: unknown;
@@ -71,7 +52,6 @@ export interface WsEventMap {
   guild_member_removed: unknown;
   /** Live moderation action broadcast (gateway → Redis → backend → WS). */
   moderation_action: ModerationAction;
-  media_state: MediaState;
   user_state: unknown;
   ui_state: unknown;
   heartbeat: unknown;