fix: add aria-label and error handling to copy profile URL button

[mrunalC27]

Summary

Adds aria-label="Copy profile URL" to the copy button in the settings page, and adds proper .then().catch() error handling to navigator.clipboard.writeText() so "Copied!" only shows when the copy actually succeeds.

Closes #218

Type of Change

• Bug fix

Changes Made

• Added aria-label="Copy profile URL" to the copy button for screen reader accessibility
• Added type="button" to prevent accidental form submission
• Wrapped navigator.clipboard.writeText() in .then().catch() so setCopied(true) only runs on success
• Added empty .catch(() => {}) to silently handle clipboard failures

How to Test

1. Go to http://localhost:3000/dashboard/settings
2. Find the Share Profile section with the profile URL
3. Click the Copy button — it should show "Copied!" for 2 seconds then revert to "Copy"
4. Open DevTools (F12) → Elements tab → inspect the button and confirm aria-label="Copy profile URL" is present
5. In DevTools Console, run navigator.clipboard.writeText = () => Promise.reject('denied') to simulate clipboard failure, then click Copy — button should NOT show "Copied!"

Screenshots (if UI change)

No visual change — the button looks the same but is now accessible and reliable.

Checklist

• Linked issue in summary
• npm run lint passes locally
• No TypeScript errors (npm run type-check)
• Self-reviewed the diff
• Added/updated tests if applicable

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