Replace decorator with manual custom element registration (#59)

Optimize customElement definition logic to prevent errors on duplicate registration

```release-note
None
```

Author: ruibaby

packages/search-widget/src/search-form.ts

@@ -8,13 +8,12 @@ import resetStyles from '@unocss/reset/tailwind.css?inline';
 import { type DebouncedFunction, debounce } from 'es-toolkit';
 import { uniqBy } from 'es-toolkit/compat';
 import { css, html, LitElement, unsafeCSS } from 'lit';
-import { customElement, property, state } from 'lit/decorators.js';
+import { property, state } from 'lit/decorators.js';
 import { createRef, type Ref, ref } from 'lit/directives/ref.js';
 import { unsafeHTML } from 'lit/directives/unsafe-html.js';
 import { HISTORY_KEY, MAX_HISTORY_ITEMS } from './constants';
 import baseStyles from './styles/base';
 
-@customElement('search-form')
 export class SearchForm extends LitElement {
   @property({ type: String })
   baseUrl = '';
@@ -341,6 +340,9 @@ export class SearchForm extends LitElement {
   ];
 }
 
+customElements.get('search-form') ||
+  customElements.define('search-form', SearchForm);
+
 declare global {
   interface HTMLElementTagNameMap {
     'search-form': SearchForm;

packages/search-widget/src/search-modal.ts

@@ -1,13 +1,12 @@
 import resetStyles from '@unocss/reset/tailwind.css?inline';
 import { css, html, LitElement, type PropertyValues, unsafeCSS } from 'lit';
-import { customElement, property } from 'lit/decorators.js';
+import { property } from 'lit/decorators.js';
 import { styleMap } from 'lit/directives/style-map.js';
 import { OverlayScrollbars } from 'overlayscrollbars';
 import overlayscrollbarsStyles from 'overlayscrollbars/styles/overlayscrollbars.css?inline';
 import './search-form';
 import baseStyles from './styles/base';
 
-@customElement('search-modal')
 export class SearchModal extends LitElement {
   @property({
     type: Boolean,
@@ -179,6 +178,9 @@ export class SearchModal extends LitElement {
   ];
 }
 
+customElements.get('search-modal') ||
+  customElements.define('search-modal', SearchModal);
+
 declare global {
   interface HTMLElementTagNameMap {
     'search-modal': SearchModal;