Add LLM chat history widget (#3907)

Co-authored-by: github-actions <github-actions@github.com>

src/components/graph/widgets/chatHistory/CopyButton.vue

@@ -0,0 +1,36 @@
+<template>
+  <Button
+    v-tooltip="
+      copied ? $t('chatHistory.copiedTooltip') : $t('chatHistory.copyTooltip')
+    "
+    text
+    rounded
+    class="!p-1 !h-4 !w-6 text-gray-400 hover:text-gray-600 dark-theme:hover:text-gray-200 transition"
+    pt:icon:class="!text-xs"
+    :icon="copied ? 'pi pi-check' : 'pi pi-copy'"
+    :aria-label="
+      copied ? $t('chatHistory.copiedTooltip') : $t('chatHistory.copyTooltip')
+    "
+    @click="handleCopy"
+  />
+</template>
+
+<script setup lang="ts">
+import Button from 'primevue/button'
+import { ref } from 'vue'
+
+const { text } = defineProps<{
+  text: string
+}>()
+
+const copied = ref(false)
+
+const handleCopy = async () => {
+  if (!text) return
+  await navigator.clipboard.writeText(text)
+  copied.value = true
+  setTimeout(() => {
+    copied.value = false
+  }, 1024)
+}
+</script>