feat: Add assistant filter support to documents page (#10697)

This PR introduces support for an assistant filter on the documents page.

- Moved the existing assistant filter functionality to a standalone, reusable component.
- Updated the documents page and responses page to use the component

app/javascript/dashboard/components-next/captain/pageComponents/AssistantSelector.vue

@@ -0,0 +1,68 @@
+<script setup>
+import { computed, ref } from 'vue';
+import { useMapGetter } from 'dashboard/composables/store';
+import { useI18n } from 'vue-i18n';
+import { OnClickOutside } from '@vueuse/components';
+import Button from 'dashboard/components-next/button/Button.vue';
+import DropdownMenu from 'dashboard/components-next/dropdown-menu/DropdownMenu.vue';
+
+const props = defineProps({
+  assistantId: {
+    type: [String, Number],
+    required: true,
+  },
+});
+
+const emit = defineEmits(['update']);
+const { t } = useI18n();
+const isFilterOpen = ref(false);
+
+const assistants = useMapGetter('captainAssistants/getRecords');
+const assistantOptions = computed(() => [
+  {
+    label: t(`CAPTAIN.RESPONSES.FILTER.ALL_ASSISTANTS`),
+    value: 'all',
+    action: 'filter',
+  },
+  ...assistants.value.map(assistant => ({
+    value: assistant.id,
+    label: assistant.name,
+    action: 'filter',
+  })),
+]);
+
+const selectedAssistantLabel = computed(() => {
+  const assistant = assistantOptions.value.find(
+    option => option.value === props.assistantId
+  );
+  return t('CAPTAIN.RESPONSES.FILTER.ASSISTANT', {
+    selected: assistant ? assistant.label : '',
+  });
+});
+
+const handleAssistantFilterChange = ({ value }) => {
+  isFilterOpen.value = false;
+  emit('update', value);
+};
+</script>
+
+<template>
+  <OnClickOutside @trigger="isFilterOpen = false">
+    <Button
+      :label="selectedAssistantLabel"
+      icon="i-lucide-chevron-down"
+      size="sm"
+      color="slate"
+      trailing-icon
+      class="max-w-48"
+      @click="isFilterOpen = !isFilterOpen"
+    />
+
+    <DropdownMenu
+      v-if="isFilterOpen"
+      :menu-items="assistantOptions"
+      class="mt-2"
+      @action="handleAssistantFilterChange"
+    />
+  </OnClickOutside>
+</template>