Adjust quotation layout to ensure documents fit within a single page

Reduces signature area and adjusts positioning in QuotationDetail.tsx to fit PDF content within a single page.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 9e1a1535-8cb3-4263-b4f8-a495169b5ac9
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/b1fc8b9d-84d4-488b-a93d-2832b63b83f4/9c639094-05b6-48c9-80d1-19cd348f9391.jpg
