fix(ui): escape the literal @ in the Minibits address label

Root cause of "click Receive, click Ecash, the modal disappears" (in
both the browser and the Android companion's WebView, since both host
the same neode-ui bundle): vue-i18n treats a bare @ as the start of
"linked message" syntax. receiveBitcoin.lnAddressLabel ("Your
@minibits.cash address:") isn't valid linked-message syntax, so
*compiling* that message throws a SyntaxError the instant it's first
rendered — i.e. the moment wallet.ecash-lnaddress resolves and the
address section becomes visible. The uncaught render-function error
blanks the whole teleported modal, which is indistinguishable from it
just closing.

Confirmed with a real (non-mocked) Vue app + real vue-i18n compiler in
a headless Chromium — a Vitest run with `t` mocked to a no-op, which is
how the existing component test suite covers this file, cannot catch a
bad message string at all. Fixed by escaping the @ as {'@'} — the same
pattern the codebase already uses for settings.domainNamePlaceholder
("user{'@'}example.com"). Added a regression test using the real
vue-i18n instance instead of the mocked one; verified it fails on the
old string and passes on the fix.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EawZPP9iidXj6Tvg3EpG3a

neode-ui/src/components/__tests__/ReceiveBitcoinModal.i18n.test.ts

@@ -0,0 +1,66 @@
+// Real vue-i18n instance (unlike ReceiveBitcoinModal.test.ts, which mocks
+// `t` to a no-op and so cannot catch a bad message string). Operator report
+// (2026-09-08): clicking the Ecash tab closed the whole Receive modal, in
+// both the browser and the Android companion's WebView. Root cause: vue-i18n
+// treats a bare `@` as the start of "linked message" syntax — `en.json`'s
+// `receiveBitcoin.lnAddressLabel` ("Your @minibits.cash address:") isn't
+// valid linked-message syntax, so *compiling* that message throws a
+// SyntaxError the instant it's first rendered (i.e. the moment the address
+// loads), and the uncaught render-function error blanks the whole teleported
+// modal. Fixed by escaping it as `{'@'}` (the same pattern already used for
+// `settings.domainNamePlaceholder`). This test uses the real compiler so a
+// future bad interpolation string in this component fails fast in `npm test`
+// instead of only in a live browser.
+import { flushPromises, mount } from '@vue/test-utils'
+import { describe, expect, it, vi } from 'vitest'
+import ReceiveBitcoinModal from '../ReceiveBitcoinModal.vue'
+import { rpcClient } from '@/api/rpc-client'
+import i18n from '@/i18n'
+
+vi.mock('@/api/rpc-client', () => ({
+  rpcClient: { call: vi.fn() },
+}))
+
+vi.mock('@/composables/useLightningRequired', () => ({
+  useLightningRequired: () => ({
+    requireLightningReady: vi.fn().mockResolvedValue(true),
+    handleLightningFailure: vi.fn().mockReturnValue(false),
+  }),
+}))
+
+describe('ReceiveBitcoinModal — ecash tab with the real vue-i18n compiler', () => {
+  it('renders the Minibits address label without an uncaught render error', async () => {
+    vi.mocked(rpcClient.call).mockImplementation(async ({ method }: { method: string }) => {
+      if (method === 'wallet.ecash-lnaddress') {
+        return { address: 'someone@minibits.cash' } as never
+      }
+      return { claimed_count: 0, received_sats: 0, failed_count: 0 } as never
+    })
+
+    const wrapper = mount(ReceiveBitcoinModal, {
+      props: { show: true },
+      attachTo: document.body,
+      global: { plugins: [i18n] },
+    })
+    let captured: unknown = null
+    wrapper.vm.$.appContext.app.config.errorHandler = (err) => { captured = err }
+    await flushPromises()
+
+    const ecashTab = Array.from(document.body.querySelectorAll('button')).find((b) =>
+      b.textContent?.toLowerCase().includes('ecash'),
+    )
+    expect(ecashTab).toBeTruthy()
+    ecashTab!.dispatchEvent(new Event('click', { bubbles: true }))
+    await flushPromises()
+    await flushPromises()
+
+    expect(captured).toBeNull()
+    expect(wrapper.emitted('close')).toBeFalsy()
+    const dialog = document.body.querySelector('[role="dialog"]')
+    expect(dialog).toBeTruthy()
+    expect(dialog?.textContent).toContain('minibits.cash')
+    expect(dialog?.textContent).toContain('someone@minibits.cash')
+
+    wrapper.unmount()
+  })
+})

neode-ui/src/locales/en.json

@@ -777,7 +777,7 @@
     "pasteEcashToken": "Paste ecash token",
     "lnAddressTitle": "Or share your Minibits Lightning address",
     "lnAddressHint": "Anyone can pay you sats with any Lightning wallet by sending to this address — the sats arrive as ecash. Keep this screen open to receive them.",
-    "lnAddressLabel": "Your @minibits.cash address:",
+    "lnAddressLabel": "Your {'@'}minibits.cash address:",
     "lnAddressLoading": "Setting up your Lightning address…",
     "lnAddressUnavailable": "Lightning address unavailable — you can still paste a token below.",
     "lnAddressReceived": "Received {amount} sats to your Lightning address!",

neode-ui/src/locales/es.json

@@ -758,7 +758,7 @@
     "pasteEcashToken": "Pegar token Ecash",
     "lnAddressTitle": "O comparte tu direcci\u00f3n Lightning de Minibits",
     "lnAddressHint": "Cualquier persona puede pagarte sats con cualquier billetera Lightning enviando a esta direcci\u00f3n \u2014 los sats llegan como ecash. Mant\u00e9n esta pantalla abierta para recibirlos.",
-    "lnAddressLabel": "Su direcci\u00f3n @minibits.cash:",
+    "lnAddressLabel": "Su direcci\u00f3n {'@'}minibits.cash:",
     "lnAddressLoading": "Configurando su direcci\u00f3n Lightning\u2026",
     "lnAddressUnavailable": "Direcci\u00f3n Lightning no disponible \u2014 a\u00fan puede pegar un token abajo.",
     "lnAddressReceived": "\u00a1Recibi\u00f3 {amount} sats en su direcci\u00f3n Lightning!",