fix: name no identity on your own messages in the reader

The badge test said a differing sender name gets "via <identity>"; that badge is gone, so it now checks that nothing is shown and that the sub-address tag still is.

components/email/__tests__/email-identity-badge.test.tsx

@@ -4,7 +4,8 @@ import React from 'react';
 import { EmailIdentityBadge } from '../email-identity-badge';
 import type { Email, Identity } from '@/lib/jmap/types';
 
-// A draft or sent mail from "User A" showed "User A  via User A".
+// A draft or sent mail from "User A" showed "User A  via User A", and any
+// other own message "via <identity>".
 
 const identity = { id: 'id-1', name: 'User A', email: 'usera@example.org' } as Identity;
 const fromUser = (name: string) => ({ from: [{ name, email: 'usera@example.org' }], to: [] }) as unknown as Email;
@@ -15,9 +16,16 @@ describe('EmailIdentityBadge', () => {
     expect(container.textContent).toBe('');
   });
 
-  it('names the identity when the sender name differs', () => {
+  it('names no identity on your own message, whatever the sender name', () => {
+    // "via <identity>" read like a delegation warning; the address under the
+    // name already says which of your addresses sent it.
     const { container } = render(<EmailIdentityBadge email={fromUser('Support Desk')} identities={[identity]} />);
-    // The translation mock returns the key of the "via {name}" text.
-    expect(container.textContent).toContain('identity_short');
+    expect(container.textContent).toBe('');
+  });
+
+  it('still shows the sub-address tag', () => {
+    const email = { from: [{ name: 'Support Desk', email: 'usera+news@example.org' }], to: [] } as unknown as Email;
+    const { container } = render(<EmailIdentityBadge email={email} identities={[identity]} />);
+    expect(container.textContent).toContain('news');
   });
 });

components/email/email-identity-badge.tsx

@@ -111,7 +111,11 @@ export function EmailIdentityBadge({
     return null;
   }
 
-  // Full view for email viewer - now shows compact badges only
+  // Full view for email viewer - the sub-address tag only. A message of your
+  // own named its identity ("via <identity>"), which read like a delegation
+  // warning; the sender's address, shown right under the name, already says
+  // which of your addresses sent it.
+  if (!displayTag) return null;
   return (
     <div className={cn('inline-flex items-center gap-2', className)}>
       {/* Sub-address tag badge */}
@@ -130,21 +134,6 @@ export function EmailIdentityBadge({
         </div>
       )}
 
-      {/* Identity badge (only if identity has a name and no sub-address tag) */}
-      {!displayTag && matchingIdentity && showIdentityName && (
-          <div
-            className={cn(
-              'inline-flex items-center gap-1 px-2 py-0.5 rounded-md',
-              'bg-secondary text-muted-foreground border border-border',
-              'text-xs font-medium'
-            )}
-            title={t('identity_name', { name: matchingIdentity.name })}
-            aria-label={t('identity_name', { name: matchingIdentity.name })}
-          >
-            <Mail className="w-3 h-3" />
-            <span>{t('identity_short', { name: matchingIdentity.name })}</span>
-          </div>
-        )}
     </div>
   );
 }