fix: add panic recovery to search-local handler, remove unused event emission

Added defer/recover to SearchLocalHandler to prevent panics from
crashing the app. Removed the now-unused Wails event emission from
Search() and the runtime import — local results are served via the
HTTP endpoint exclusively.

frontend/wailsjs/go/explore/Service.d.ts

@@ -1,6 +1,7 @@
 // Cynhyrchwyd y ffeil hon yn awtomatig. PEIDIWCH Â MODIWL
 // This file is automatically generated. DO NOT EDIT
 import {explore} from '../models';
+import {http} from '../models';
 import {context} from '../models';
 
 export function BrowseReleaseGroups(arg1:string):Promise<Array<explore.MBReleaseGroup>>;
@@ -37,6 +38,8 @@ export function SearchArtists(arg1:string):Promise<Array<explore.MBArtist>>;
 
 export function SearchLocal(arg1:string):Promise<explore.MBSearchResult>;
 
+export function SearchLocalHandler():Promise<http.Handler>;
+
 export function SearchRecordings(arg1:string):Promise<Array<explore.MBRecording>>;
 
 export function SearchReleaseGroups(arg1:string):Promise<Array<explore.MBReleaseGroup>>;

frontend/wailsjs/go/explore/Service.js

@@ -70,6 +70,10 @@ export function SearchLocal(arg1) {
   return window['go']['explore']['Service']['SearchLocal'](arg1);
 }
 
+export function SearchLocalHandler() {
+  return window['go']['explore']['Service']['SearchLocalHandler']();
+}
+
 export function SearchRecordings(arg1) {
   return window['go']['explore']['Service']['SearchRecordings'](arg1);
 }