docs: update frontend handoff with detailed build issues

- Documented TypeScript errors in Header.tsx and signup page
- Listed useSearchParams Suspense boundary issue
- Provided specific fixes for each issue
- Backend fully operational, frontend needs code fixes before deployment

Job ID: MTAD-IMPL-2025-11-18-CL

backend/FRONTEND_HANDOFF.md

@@ -2,18 +2,46 @@
 
 **Date**: 2025-11-18
 **Job ID**: MTAD-IMPL-2025-11-18-CL
-**Status**: Backend API deployment complete → Frontend needed
+**Status**: Backend API deployment complete → Frontend needs fixes and deployment
 **Target**: Claude-Web Agent (GitHub access)
 
 ---
 
-## Quick Summary
+## Current Status
 
-✅ **Backend is fully operational and deployed** to `https://mtd.runfoo.run`
+✅ **Backend API is fully operational and deployed** to `https://mtd.runfoo.run`
+⚠️ **Frontend codebase exists but has build issues**
+❌ **Frontend not yet deployed** - Root path `/` currently returns 404
 
-❌ **Frontend is missing** - Root path `/` currently returns 404
+---
 
-**Your task**: Build and deploy a frontend home screen + navigation
+## Critical Issues to Fix
+
+The frontend code exists in `/web` directory but has **build-time errors** that prevent deployment:
+
+### 1. TypeScript Type Errors
+- **File**: `components/common/Header.tsx` (multiple locations)
+- **Issue**: `onClick` prop passed to `Link` component, but Link props don't accept `onClick`
+- **Solution**: Wrap Link in a `<div>` with the `onClick` handler, OR use next/link `onClick` callback pattern
+- **Affected lines**: 138, 150, 182 (mobile menu navigation)
+
+### 2. Checkbox Label Type Error
+- **File**: `app/(auth)/signup/page.tsx:159`
+- **Issue**: `label` prop expects `string` but JSX Element (`<span>` with links) is passed
+- **Solution**: Either:
+  - Use string label and style separately, OR
+  - Create custom checkbox component that accepts JSX labels
+
+### 3. useSearchParams() Without Suspense
+- **File**: `app/(auth)/reset-password/confirm/page.tsx:11-12`
+- **Issue**: 'use client' component uses `useSearchParams()` without Suspense boundary
+- **Next.js 13+ requirement**: Must wrap in Suspense or use a separate non-async component
+- **Solution**: Extract into separate component in Suspense boundary
+
+### 4. Build Configuration
+- **File**: `next.config.js`
+- **Issue**: TypeScript errors currently disabled (`ignoreBuildErrors: true`)
+- **Solution**: Re-enable proper TypeScript checking after fixing errors above
 
 ---