feat: add select-filtered button for visible databases search

apps/desktop/src/components/sidebar/VisibleDatabasesDialog.vue

@@ -101,10 +101,16 @@ function toggleDatabase(database: string) {
   selectedNames.value = next;
 }
 
+const isSearching = computed(() => searchText.value.trim().length > 0);
+
 function selectAll() {
   selectedNames.value = new Set(listedDatabaseNames.value);
 }
 
+function selectFiltered() {
+  selectedNames.value = new Set(filteredDatabaseNames.value);
+}
+
 function clearSelection() {
   selectedNames.value = new Set();
 }
@@ -142,6 +148,9 @@ async function saveSelection() {
           <button class="hover:text-foreground disabled:opacity-50" :disabled="isLoading" @click="selectAll">
             {{ t("visibleDatabases.selectAll") }}
           </button>
+          <button v-if="isSearching" class="hover:text-foreground disabled:opacity-50" :disabled="isLoading" @click="selectFiltered">
+            {{ t("visibleDatabases.selectFiltered") }}
+          </button>
           <button class="hover:text-foreground disabled:opacity-50" :disabled="isLoading" @click="clearSelection">
             {{ t("visibleDatabases.clear") }}
           </button>