Copy button should copy unified BIP21 invoice by default

[arkanaai]

Summary

When clicking the "copy" button on the receive screen, the unified BIP21 invoice should be copied to the clipboard automatically.

Only if the user explicitly taps one of the specific address/invoice options (on-chain address, Lightning invoice, Ark address, etc.) should that specific value overwrite the clipboard.

Current behavior

Tapping "copy" may copy an individual address/invoice type rather than the unified BIP21 URI.

Expected behavior

• Tapping "copy" → copies the full unified BIP21 invoice
• Tapping a specific address/invoice option → copies that specific value

Context

Reported in Slack by team member.

[arkanaai]

Codebase Context

Main file: src/screens/Wallet/Receive/QrCode.tsx

The receive screen has two copy entry points:

1. Tap QR code (line ~414): already calls handleCopy(qrCodeValue) which is the unified BIP21 URI ✅
2. "Copy" button (line 462): currently calls setShowCopySheet(true) — opens a bottom sheet letting the user pick which address to copy ❌

The fix is on line 462. Instead of opening the sheet, the "Copy" button should call handleCopy(bip21Uri) directly. The copy sheet should still be reachable, but only when the user explicitly wants a specific address format (e.g., by tapping individual rows in AddressList).

Relevant files:

• src/screens/Wallet/Receive/QrCode.tsx — main component, handleCopy() (line ~324), Copy button (line 462), copy sheet modal (lines 491–510)
• src/lib/bip21.ts — encodeBip21() builds the unified URI
• src/lib/clipboard.ts — copyToClipboard() utility
• src/test/screens/wallet/receive-qrcode.test.tsx — existing copy tests (lines 288–341)

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Acceptance Criteria

• Tapping "Copy" on the receive screen copies the unified BIP21 URI (e.g. bitcoin:<addr>?ark=<arkAddr>&lightning=<invoice>) to the clipboard immediately, without showing a sheet
• A "Copied to clipboard" toast confirms the action
• If the user wants a specific address format, they can still access individual copies via a secondary affordance (e.g. a "Copy specific address" link, the individual rows in the address list, or a long-press/expand gesture)
• Tapping the QR code continues to copy the BIP21 URI (already working)
• Existing unit tests pass; new test added for the direct-copy behaviour

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Suggested Approach

// QrCode.tsx line 462 — change from:
<Button label='Copy' onClick={() => setShowCopySheet(true)} secondary />

// to:
<Button label='Copy' onClick={() => handleCopy(bip21Uri)} secondary />

The copy sheet can be exposed through a separate "…" / "More" option or kept as an onLongPress / secondary button if UX wants to preserve per-format access. The showCopySheet state and the sheet modal (lines 491–510) can remain for that secondary path.

[bordalix]

When clicking Copy, it should open the sheet and copy the bip21 to the clipboard