fix: resolve TS2769 errors in invoicePdfService by eliminating duplicate @types/react

Root cause: apps/api declared react@18 but @types/react@19, creating a nested
apps/api/node_modules/@types/react@19.2.17 that conflicted with @react-pdf/renderer's
type resolution from root node_modules/@types/react.

Changes:
- Removed react-dom from apps/api dependencies (unused)
- Removed @types/react and @types/react-dom from apps/api devDependencies
- Both API code and @react-pdf/renderer now resolve @types/react from a single
  root copy (v19), eliminating the TS2769 contextType incompatibility errors
- Regenerated package-lock.json with deduped dependency tree

Validation:
- npm ls shows single @types/react installation
- No nested @types/react under apps/api/node_modules
- API type-check (tsc --noEmit): 0 errors
- API build: succeeds
- Docker build (Dockerfile.production): all 6 packages build successfully

apps/api/package.json

@@ -43,7 +43,6 @@
     "otplib": "^12.0.1",
     "qrcode": "^1.5.3",
     "react": "^18.3.1",
-    "react-dom": "^18.3.1",
     "resend": "^3.2.0",
     "socket.io": "^4.7.5",
     "swagger-ui-express": "^5.0.1",
@@ -63,8 +62,6 @@
     "@types/node-cron": "^3.0.11",
     "@types/nodemailer": "^6.4.17",
     "@types/qrcode": "^1.5.5",
-    "@types/react": "^19.2.0",
-    "@types/react-dom": "^19.2.0",
     "@types/supertest": "^6.0.2",
     "@types/swagger-ui-express": "^4.1.8",
     "supertest": "^7.0.0",