feat(ext/popup): SecureNote view + form on shared helpers

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

@@ -4,16 +4,18 @@
 import { navigate, getState } from '../popup';
 import type { Item, ItemType } from '../../shared/types';
 import * as login from './types/login';
+import * as secureNote from './types/secure-note';
 
 export function renderItemForm(app: HTMLElement, mode: 'add' | 'edit'): void {
   login.teardown();   // detail-view's ticker/listener don't leak into form
+  secureNote.teardown();
   const state = getState();
   const existing = mode === 'edit' ? state.selectedItem : null;
   const type: ItemType = existing?.type ?? state.newType ?? 'login';
 
   switch (type) {
     case 'login':       return login.renderForm(app, mode, existing);
-    case 'secure_note':
+    case 'secure_note': return secureNote.renderForm(app, mode, existing);
     case 'identity':
     case 'card':
     case 'key':