refactor: use try-catch-finally according to the review proposal

pls refer to !60 (comment 370134)

src/.vuepress/components/SearchPage.vue

@@ -75,13 +75,19 @@ export default {
       this.search(this.query, 0, this.size)
     },
     async search(value, from, size) {
-      this.loading = true;
-      const searchResponse = await apiService.search(value, from, size);
+      let searchResponse;
 
-      if (searchResponse) {
-        this.loading = false;
-        const items = searchResponse.hits?.hits;
+      try {
+        searchResponse = await apiService.search(value, from, size);
+      } catch(error) {
+        // handle error here ...
+      } finally {
+        this.loading = true;
+      }
 
+      if (searchResponse) {
+          this.loading = false;
+          const items = searchResponse.hits?.hits;
         if (items) {
           this.total = searchResponse.hits?.total.value || 0;
           this.items = items.map(x => ({ ...x, searchTerm: value }));