Add search retry functionality

This commit implements query invalidation logic that runs when the
requested query is same as the last one. This allows for seamless
retries of previous searches without reloading or moving around routes,
improving user experience and reducing bandwidth usage.

Note that this commit does not change the behavior of the search bar
located in the app header.

src/components/search/search.js

@@ -95,8 +95,14 @@ const Search = {
   },
   methods: {
     newQuery (query) {
+      if (this.lastQuery === query) {
+        // Handle search retries
+        this.lastQuery = "" // invalidate state
+        this.search(query)
+      } else {
         this.$router.push({ name: 'search', query: { query } })
         this.$refs.searchInput.focus()
+      }
     },
     async search (query, searchType = null) {
       if (!query) {