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/popup.ts

@@ -30,6 +30,10 @@ export function escapeHtml(str: string): string {
 
 // --- Pop out to tab ---
 
+export function isInTab(): boolean {
+  return window.location.search.length > 0;
+}
+
 export function popOutToTab(): void {
   const state = getState();
   const params = new URLSearchParams();