feat: show the mail skeleton while a mailto link opens

app/(main)/protocol/mailto/page.tsx

@@ -3,6 +3,14 @@ import { MailtoProtocolClient } from "@/components/protocol/mailto-protocol-clie
 
 export default async function MailtoProtocolPage() {
   const t = await getTranslations("protocol_handlers");
+  const tSidebar = await getTranslations("sidebar");
+  const labels = {
+    mail: tSidebar("mail"),
+    calendar: tSidebar("calendar"),
+    contacts: tSidebar("contacts"),
+    files: tSidebar("files"),
+    settings: tSidebar("settings"),
+  };
 
-  return <MailtoProtocolClient openingText={t("opening_mailto")} />;
+  return <MailtoProtocolClient openingText={t("opening_mailto")} labels={labels} />;
 }

components/protocol/__tests__/mailto-protocol-client.test.tsx

@@ -0,0 +1,26 @@
+import { render } from '@testing-library/react';
+import { afterEach, describe, expect, it, vi } from 'vitest';
+
+vi.mock('@/lib/protocol-handlers/session', () => ({
+  // Still asking an open tab whether it takes the message.
+  requestOpenMailtoInExistingClient: vi.fn(() => new Promise(() => {})),
+  savePendingMailto: vi.fn(),
+}));
+
+const { MailtoProtocolClient } = await import('../mailto-protocol-client');
+
+afterEach(() => {
+  window.history.replaceState(null, '', '/');
+});
+
+describe('mailto handler page', () => {
+  // It hands over to the mail page, where the composer opens: it draws that
+  // page's skeleton instead of a line of text on a blank page.
+  it('draws the mail skeleton with the opening text as its status', () => {
+    window.history.replaceState(null, '', '/protocol/mailto?url=mailto%3Aa%40example.com');
+    const { container } = render(<MailtoProtocolClient openingText="Opening email…" />);
+    const region = container.querySelector('[data-boot-skeleton="mail"]');
+    expect(region).not.toBeNull();
+    expect(region!.querySelector('[role="status"]')?.textContent).toBe('Opening email…');
+  });
+});

components/protocol/mailto-protocol-client.tsx

@@ -1,6 +1,8 @@
 "use client";
 
 import { useEffect } from "react";
+import { MailSkeleton } from "@/components/boot-skeleton/mail-skeleton";
+import type { RailLabels } from "@/components/boot-skeleton/shell";
 import { parseMailto } from "@/lib/protocol-handlers/mailto";
 import { requestOpenMailtoInExistingClient, savePendingMailto } from "@/lib/protocol-handlers/session";
 import { useSettingsStore } from "@/stores/settings-store";
@@ -51,9 +53,11 @@ async function focusExistingClient() {
 
 interface MailtoProtocolClientProps {
   openingText: string;
+  /** The phone bottom bar's labels for the skeleton. */
+  labels?: RailLabels;
 }
 
-export function MailtoProtocolClient({ openingText }: MailtoProtocolClientProps) {
+export function MailtoProtocolClient({ openingText, labels }: MailtoProtocolClientProps) {
   useEffect(() => {
     let cancelled = false;
 
@@ -99,9 +103,7 @@ export function MailtoProtocolClient({ openingText }: MailtoProtocolClientProps)
     };
   }, []);
 
-  return (
-    <main className="flex min-h-screen items-center justify-center">
-      <p>{openingText}</p>
-    </main>
-  );
+  // The mail page this hands over to, where the composer opens: its skeleton,
+  // with the opening text as the status message.
+  return <MailSkeleton label={openingText} labels={labels} />;
 }