fix: update the z-index of search button mainly for yaml mode (#28878)

src/components/ha-code-editor.ts

@@ -255,6 +255,7 @@ export class HaCodeEditor extends ReactiveElement {
         ...this._loadedCodeMirror.tabKeyBindings,
         saveKeyBinding,
       ]),
+      this._loadedCodeMirror.search({ top: true }),
       this._loadedCodeMirror.langCompartment.of(this._mode),
       this._loadedCodeMirror.haTheme,
       this._loadedCodeMirror.haSyntaxHighlighting,

src/resources/codemirror.ts

@@ -15,7 +15,11 @@ import { tags } from "@lezer/highlight";
 export { autocompletion } from "@codemirror/autocomplete";
 export { defaultKeymap, history, historyKeymap } from "@codemirror/commands";
 export { highlightingFor, foldGutter } from "@codemirror/language";
-export { highlightSelectionMatches, searchKeymap } from "@codemirror/search";
+export {
+  highlightSelectionMatches,
+  search,
+  searchKeymap,
+} from "@codemirror/search";
 export { EditorState } from "@codemirror/state";
 export {
   crosshairCursor,