[FE-15] Implement QR code display and download for assets in opsce folder

[yusuftomilola]

Problem

The backend can generate QR codes for assets (BE-22), but the frontend has no component to display or download them. Physical asset tags cannot be printed without this.

Proposed Solution

Create frontend/opsce/features/assets/AssetQRCode.tsx. Fetch the QR code from GET /api/assets/:id/qr?format=base64 and display it. Provide a download button and a print button.

Acceptance Criteria

• QR code image displayed in the asset detail page within a card
• "Download PNG" button triggers browser download of the QR code image
• "Print Tag" button opens a print-optimized view with the QR code, asset name, and serial number
• Shows a loading skeleton while the QR code is fetching
• Gracefully shows an error state if the QR endpoint returns a non-200 response
• QR code component also accepts an optional size prop (default 200px)

[snowrugar-beep]

@snowrugar-beep has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hello, Can I please take this?

ℹ️ Repo Maintainers: To accept this application, review their application or assign @snowrugar-beep to this issue.

[drips-wave]

Congratulations, @snowrugar-beep! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @snowrugar-beep: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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