fix: repair invite links, social features, messaging + Discord UI overhaul

Phase 1 - Feature Repair:
- Fix member kick/leave: add missing db.delete() call in servers.ts
- Stabilize invite codes: return existing code instead of regenerating
- Fix user search: use LIKE instead of exact match in social.ts
- Wire DM button on FriendsPage to create/navigate to DM channels
- Add cancel outgoing friend request (DELETE endpoint + frontend)
- Add accept/decline friend request actions with WS real-time events
- Fix replyToId persistence in message creation
- Hydrate reactions and replyTo in message queries
- Add joinByCode to API client and serverStore
- Add friend_request_received/accepted WebSocket events

Phase 2 - Discord UI Overhaul:
- Remove stray borders between layout columns
- Replace shadow-sm with shadow-header on content headers
- Replace all bg-gray-*/text-gray-* with Discord color tokens
- Ensure flat color contrast (#1E1F22, #2B2D31, #313338)

Testing:
- Set up vitest + @testing-library/react + jsdom
- Add 17 tests across InviteModal, JoinServer, FriendsPage (all passing)
- Fix vite resolve.extensions to prefer .tsx over stale .js files

packages/server/src/index.ts

@@ -4,7 +4,7 @@ import websocket from '@fastify/websocket';
 import multipart from '@fastify/multipart';
 import fastifyStatic from '@fastify/static';
 import { config } from './config.js';
-import { initDatabase } from './db/index.js';
+import { getDb } from './db/index.js';
 import { seedDatabase } from './db/seed.js';
 import { authRoutes } from './routes/auth.js';
 import { userRoutes } from './routes/users.js';
@@ -14,6 +14,8 @@ import { messageRoutes } from './routes/messages.js';
 import { uploadRoutes } from './routes/uploads.js';
 import { dmRoutes } from './routes/dm.js';
 import { livekitRoutes } from './routes/livekit.js';
+import { socialRoutes } from './routes/social.js';
+import { utilRoutes } from './routes/utils.js';
 import { registerWebSocket } from './ws/handler.js';
 import path from 'path';
 import fs from 'fs';
@@ -50,7 +52,8 @@ async function main(): Promise<void> {
     });
   }
 
-  initDatabase();
+  // Initialize database
+  getDb();
   await seedDatabase();
 
   await app.register(authRoutes);
@@ -61,6 +64,8 @@ async function main(): Promise<void> {
   await app.register(uploadRoutes);
   await app.register(dmRoutes);
   await app.register(livekitRoutes);
+  await app.register(socialRoutes);
+  await app.register(utilRoutes);
   await app.register(registerWebSocket);
 
   app.get('/api/health', async () => {