Added components for PM apps

[naman0r]

ℹ️ Issue

Closes #210

📝 Description

Full file upload flow for applicants

Briefly list the changes made to the code:

1. File Download Endpoint Added

File: apps/backend/src/file-upload/file-upload.service.ts

• Added getFileById(fileId: number) method
• Returns complete file with data and relations (application, user)
• Throws NotFoundException if file doesn't exist

2. File: apps/backend/src/file-upload/file-upload.controller.ts

• Added GET /api/file-upload/download/:fileId endpoint
• Uses StreamableFile for efficient file downloads
• Sets proper HTTP headers:
  • Content-Type: File's mimetype
  • Content-Disposition: Attachment with filename
  • Content-Length: File size
• Returns file as downloadable blob

3. Download File Method Added (frontend_

File: apps/frontend/src/api/apiClient.ts

• Added downloadFile(accessToken: string, fileId: number): Promise<Blob> method
• Configured axios to handle responseType: 'blob'
• Properly passes authorization token in headers
• Returns blob for browser download

4: Reusable FileWidget Component

5. Integrated FileWidget into Application Detail View

File: apps/frontend/src/features/applications/components/ApplicationTables/individualApplication.tsx

6. UI Integration:

• Added Grid container with FileWidget components
• Resume widget: Always visible (Grid xs={12} md={6} or md={12})
• PM Challenge widget: Conditionally rendered only if isPM === true
• Positioned after form controls, before Application Response section
• Uses onFileUploaded callback to refresh file list after upload

FORM LINK:
https://docs.google.com/forms/d/e/1FAIpQLScGimGWc9CGy9gGsGOVzPCyM3hapgg94IPU2LA6qSk0SR3F2Q/viewform?usp=sharing&ouid=114299777948262504771 (click edit form button on bottom right)

(there is a weird overlapping issue which we will fix)

[Ryaken-Nakamoto]

W PR, ggs