feat: resolve issues 554-557

[Judekings]

Issue 557: Add copy-to-clipboard button for creator Stellar address

• Add FEATURED_CREATOR_STELLAR_ADDRESS constant (demo Stellar public key)
• Add stellarAddressCopied state for 2-second Copied! feedback
• Add handleCopyStellarAddress using existing copyTextToClipboard util
• Render address row with truncated mono display and accessible copy button
• Button aria-label toggles between 'Copy Stellar address' and 'Stellar address copied'

Issue 556: Add structured debug log for React Query cache miss

• Import useQueryClient in useCreatorDetail
• Detect cache miss by checking queryClient.getQueryData before fetch
• Emit console.debug with { creator_id, cache_status: 'miss', duration_ms }
• Log is skipped in test environments (NODE_ENV === 'test')

Issue 555: Add unit tests for useFormatXlm hook

• Create src/hooks/useFormatXlm.ts with formatXlm() and useFormatXlm()
• 16 tests covering: default 2dp precision, decimal override (0 and 7), thousands separator, zero input, large values without scientific notation, and hook interface stability

Issue 554: Add T keyboard shortcut to open trade panel

• Add isTradeShortcut() helper (bare T, no modifiers)
• Stabilise openTradeDialog with useCallback
• Register keydown listener after openTradeDialog declaration to avoid TS2448 'used before declaration' error
• Listener respects isEditableShortcutTarget() and cleans up on unmount
• Document shortcut in README.md

Misc: update .gitignore with snapshots, *.snap, coverage, .nyc_output,
Thumbs.db, and lock files from other package managers

Summary

Testing

• pnpm lint
• pnpm build

Checklist

• Linked issue or backlog item
• Scope is limited to the stated change
• Updated docs if behavior or setup changed
• Added screenshots for UI changes when relevant
• closes
• closes Add keyboard shortcut to open the trade panel from the creator profile page #554
• closes Add unit tests for useFormatXlm hook covering decimal precision and large values #555
• closes Add structured log for React Query cache miss on creator profile fetch #556
• closes Add copy-to-clipboard button for creator Stellar address on profile page #557

[drips-wave]

@Judekings Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits