Transform webapp into Resume Branches - Git for CVs

Features:
- Complete CV version control system with branching and submission tracking
- Interactive tree visualization showing master resume, branches, and submissions
- Diff viewer for tracking changes between CV versions
- Professional landing page with Git for CVs messaging
- Modern dashboard with three-panel layout (tree, details, preview)
- ATS-safe design philosophy throughout
- Tailwind 4 configuration with professional design system

Components:
- CVTree: Interactive expandable tree for CV versions
- DiffViewer: Visual diff display with add/remove/change highlighting
- Comprehensive data models for documents, versions, patches, submissions
- Upload modal and action buttons for CV management
- Status tracking and public sharing indicators

Architecture:
- TypeScript types for complete CV management workflow
- Responsive design with proper hover states and animations
- Mock data demonstrating realistic ML Engineer and Backend Engineer branches
- Ready for FastAPI backend integration and DOCX processing

This implements the complete 'Resume Branches' vision as a modern webapp
that treats CV management like version control for documents.

apps/webapp/next-env.d.ts

@@ -1,6 +1,6 @@
 /// <reference types="next" />
-/// <reference types="next/types/global" />
 /// <reference types="next/image-types/global" />
+/// <reference path="./.next/types/routes.d.ts" />
 
 // NOTE: This file should not be edited
-// see https://nextjs.org/docs/basic-features/typescript for more information.
+// see https://nextjs.org/docs/app/api-reference/config/typescript for more information.