fix(ext/popup): auto-popout for attachment types, keep login/note in popup

- Login and secure_note types stay in popup without attachment UI
- All other types (identity, card, key, totp, document) auto-redirect
  to full tab when selected
- Attachments only shown for login/secure_note when opened in tab

Co-Authored-By: Claude <noreply@anthropic.com>

extension/src/popup/components/item-form.ts

@@ -78,7 +78,11 @@ function renderTypeSelection(app: HTMLElement): void {
     btn.addEventListener('click', () => {
       const type = btn.dataset.type as ItemType;
       setState({ newType: type });
-      renderItemForm(app, 'add');
+      if (type === 'login' || type === 'secure_note') {
+        renderItemForm(app, 'add');
+      } else {
+        popOutToTab();
+      }
     });
   });
 }