Add Swagger docs at /docs and /openapi.json; frontend and backend updates

Made-with: Cursor

backend/package.json

@@ -17,7 +17,9 @@
     "express-rate-limit": "^7.4.1",
     "nostr-tools": "^2.4.4",
     "pg": "^8.13.1",
-    "uuid": "^10.0.0"
+    "swagger-ui-express": "^5.0.1",
+    "uuid": "^10.0.0",
+    "ws": "^8.19.0"
   },
   "devDependencies": {
     "@types/better-sqlite3": "^7.6.11",
@@ -25,7 +27,9 @@
     "@types/express": "^4.17.21",
     "@types/node": "^22.9.0",
     "@types/pg": "^8.11.10",
+    "@types/swagger-ui-express": "^4.1.8",
     "@types/uuid": "^10.0.0",
+    "@types/ws": "^8.18.1",
     "tsx": "^4.19.2",
     "typescript": "^5.6.3"
   }