Bug: Missing file format validation in ResumeDropzone file input handler

[saqibxjaved]

📋 Description

The ResumeDropzone component has inconsistent file validation. It validates file types when files are dragged and dropped, but fails to validate when files are selected through the file picker.

🐛 The Problem

Current Behavior:

• Drag-and-drop: ✅ Validates file is PDF, shows error if not
• File input picker: ❌ No validation, accepts any file type

Impact:

• Users can select non-PDF files via the file picker
• App attempts to parse non-PDF files, causing silent failures
• The error state (hasNonPdfFile) is never triggered for file input selections

📍 Location

File: src/app/components/ResumeDropzone.tsx

🧪 Testing

• Select a .pdf file via file picker → should import successfully
• Select a non-PDF file (.txt, .docx, etc.) → should show "Only pdf file is supported" error

📌 Type

• bug: Missing file format validation
• good first issue
• GSSoC-2026

CAN I GET THE ISSUE ASSIGNED?