Export/download buttons allow duplicate downloads on repeated clicks

[heyiamwahab236]

Current Behavior

On the project Findings view (Export VEX / Export VDR) and the project Components view (Download BOM – inventory/with-vulnerabilities, and Download component – CSV), the export buttons have no guard against repeated clicks. Each click immediately starts a new download, so clicking while a download is already in progress triggers multiple simultaneous requests and duplicate file downloads.

Steps to Reproduce

1. Open a project with findings/components.
2. On Findings, rapidly click "Export VEX" (or VDR); on Components, rapidly click "Download BOM" (or the CSV option).
3. Multiple identical downloads are triggered.

Expected Behavior

While an export is in progress the control should be disabled (with a spinner), so one click = one download until it completes.

Dependency-Track Frontend Version

4.x

Browser

Microsoft Edge

Browser Version

No response

Operating System

Windows

Checklist

• I have read and understand the contributing guidelines
• I have checked the existing issues for whether this defect was already reported