feat: Add Ask assistant behind feature flag (#9995)

Co-authored-by: Ricardo Espinoza <ricardo@n8n.io>
Co-authored-by: Milorad Filipovic <milorad@n8n.io>

packages/editor-ui/src/components/AskAssistant/AskAssistantFloatingButton.vue

@@ -0,0 +1,98 @@
+<script setup lang="ts">
+import { useI18n } from '@/composables/useI18n';
+import { useTelemetry } from '@/composables/useTelemetry';
+import { useAssistantStore } from '@/stores/assistant.store';
+import { useWorkflowsStore } from '@/stores/workflows.store';
+import AssistantAvatar from 'n8n-design-system/components/AskAssistantAvatar/AssistantAvatar.vue';
+import AskAssistantButton from 'n8n-design-system/components/AskAssistantButton/AskAssistantButton.vue';
+import { computed } from 'vue';
+
+const assistantStore = useAssistantStore();
+const i18n = useI18n();
+const telemetry = useTelemetry();
+const workflowStore = useWorkflowsStore();
+
+const lastUnread = computed(() => {
+	const msg = assistantStore.lastUnread;
+	if (msg?.type === 'block') {
+		return msg.title;
+	}
+	if (msg?.type === 'text') {
+		return msg.content;
+	}
+	if (msg?.type === 'code-diff') {
+		return msg.description;
+	}
+	return '';
+});
+
+const onClick = () => {
+	assistantStore.openChat();
+	telemetry.track(
+		'User opened assistant',
+		{
+			source: 'canvas',
+			task: 'placeholder',
+			has_existing_session: !assistantStore.isSessionEnded,
+			workflow_id: workflowStore.workflowId,
+		},
+		{ withPostHog: true },
+	);
+};
+</script>
+
+<template>
+	<div
+		v-if="assistantStore.canShowAssistantButtons && !assistantStore.isAssistantOpen"
+		:class="$style.container"
+	>
+		<n8n-tooltip
+			:z-index="4000"
+			placement="top"
+			:visible="!!lastUnread"
+			:popper-class="$style.tooltip"
+		>
+			<template #content>
+				<div :class="$style.text">{{ lastUnread }}</div>
+				<div :class="$style.assistant">
+					<AssistantAvatar size="mini" />
+					<span>{{ i18n.baseText('aiAssistant.name') }}</span>
+				</div>
+			</template>
+			<AskAssistantButton :unread-count="assistantStore.unreadCount" @click="onClick" />
+		</n8n-tooltip>
+	</div>
+</template>
+
+<style lang="scss" module>
+.container {
+	position: absolute;
+	bottom: var(--spacing-s);
+	right: var(--spacing-s);
+	z-index: 3000;
+}
+
+.tooltip {
+	min-width: 150px;
+	max-width: 265px !important;
+	line-height: normal;
+}
+
+.assistant {
+	font-size: var(--font-size-3xs);
+	line-height: var(--spacing-s);
+	font-weight: var(--font-weight-bold);
+	margin-top: var(--spacing-xs);
+	> span {
+		margin-left: var(--spacing-4xs);
+	}
+}
+
+.text {
+	overflow: hidden;
+	display: -webkit-box;
+	-webkit-line-clamp: 2; /* number of lines to show */
+	line-clamp: 2;
+	-webkit-box-orient: vertical;
+}
+</style>