feat: launch readiness — PWA, API hardening, memory leak fixes, sticker removal

- Add PWA infrastructure: vite-plugin-pwa, manifest, service worker,
  SW update prompt component, placeholder icons, Apple meta tags
- Harden API client: 401 auto-logout, AbortController timeouts
  (30s standard, 120s uploads), onUnauthorized callback
- Fix memory leaks: clear voice user status on leave, clean up all
  Maps (channelToSpaceMap, permissions, etc.) on removeSpace
- Upgrade error boundary to Aether Drift design with Try Again button,
  collapsible stack trace, and componentDidCatch logging
- Configure desktop icon paths in electron-builder.yml
- Remove sticker feature (server routes, schema, types, UI components)
- Fix Docker build: use **/node_modules in .dockerignore to prevent
  COPY from clobbering pnpm-installed workspace dependencies
- Add vite-env.d.ts declarations for noise suppressor wasm imports
- Exclude test files from tsc build via tsconfig

packages/server/src/ws/events.ts

@@ -8,7 +8,6 @@ import { broadcastDmMessage, getDmMessageWithUser } from '../routes/dm.js';
 import { MAX_MESSAGE_LENGTH, type MessageWithUser, type Attachment, type DmMessageWithUser } from '@backspace/shared';
 import { sanitizeUser } from '../utils/sanitize.js';
 import { deleteAttachmentFiles } from '../utils/fileCleanup.js';
-import { hydrateSticker } from '../routes/messages.js';
 
 /**
  * Re-evaluate SPEAK permission for all participants in voice channels
@@ -100,7 +99,6 @@ function getMessageWithUser(messageId: string): MessageWithUser | null {
     }
   }
 
-  const stickerId = (message as any).stickerId ?? null;
   return {
     id: message.id,
     channelId: message.channelId,
@@ -113,8 +111,6 @@ function getMessageWithUser(messageId: string): MessageWithUser | null {
     attachments,
     reactions,
     replyTo,
-    stickerId,
-    sticker: hydrateSticker(stickerId),
   };
 }