feat: persist draft messages and UI refinements

- Add dedicated draft-store with AsyncStorage persistence for drafts
  that survive app refresh/crash
- Reduce markdown bold weight from bold to medium (500)
- Various theme and component style updates
- Server bootstrap and config improvements

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package.json

@@ -4,7 +4,8 @@
   "private": true,
   "workspaces": [
     "packages/server",
-    "packages/app"
+    "packages/app",
+    "packages/relay"
   ],
   "scripts": {
     "dev": "npm run dev --workspace=@paseo/server",