Add feature to send PDF files to a webhook for processing

Implement a new API endpoint `/api/bap/send-webhook` that accepts PDF uploads and recipient data, processing them via a n8n webhook. This includes client-side state management for file uploads and processing feedback, along with server-side validation and error handling. Dependencies for `form-data`, `multer`, and `node-fetch` were also updated.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: cfbfe47c-0c9a-4ebf-8a41-2937407eccff
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/1957c339-2757-4d1f-8e92-e9f71a1ce58e/cfbfe47c-0c9a-4ebf-8a41-2937407eccff/nLNyJ0g

package.json

@@ -43,7 +43,10 @@
     "@radix-ui/react-tooltip": "^1.2.0",
     "@tanstack/react-query": "^5.60.5",
     "@types/bcrypt": "^6.0.0",
+    "@types/form-data": "^2.2.1",
     "@types/memoizee": "^0.4.12",
+    "@types/multer": "^2.0.0",
+    "@types/node-fetch": "^2.6.13",
     "@types/pg": "^8.15.4",
     "bcrypt": "^6.0.0",
     "caniuse-lite": "^1.0.30001727",
@@ -59,6 +62,7 @@
     "express": "^4.21.2",
     "express-rate-limit": "^7.5.1",
     "express-session": "^1.18.1",
+    "form-data": "^4.0.4",
     "framer-motion": "^11.13.1",
     "iconv-lite": "^0.6.3",
     "input-otp": "^1.4.2",
@@ -66,9 +70,11 @@
     "lucide-react": "^0.453.0",
     "memoizee": "^0.4.17",
     "memorystore": "^1.6.7",
+    "multer": "^2.0.2",
     "nanoid": "^5.1.5",
     "next-themes": "^0.4.6",
     "node-cron": "^4.2.1",
+    "node-fetch": "^3.3.2",
     "openid-client": "^6.7.1",
     "passport": "^0.7.0",
     "passport-local": "^1.0.0",