nuxt-app/app/components/agent/AgentMarkdown.vue

<script setup lang="ts">
import { marked, Renderer } from "marked";

const props = defineProps<{
  text: string;
}>();

marked.setOptions({ breaks: true, gfm: true });

const renderer = new Renderer();
const originalCode = renderer.code.bind(renderer);
renderer.code = (code: string, infostring: string | undefined, escaped: boolean) => {
  const lang = (infostring || "").trim();
  const langLabel = lang ? lang.split(/\s+/)[0] : "text";
  const inner = originalCode(code, infostring, escaped);
  return `<div class="md-code-block"><div class="md-code-toolbar"><span class="md-code-lang">${langLabel}</span><button type="button" class="md-code-copy" data-code="${encodeURIComponent(code)}" aria-label="复制代码"><svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="9" y="9" width="13" height="13" rx="2" ry="2"/><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/></svg><span class="md-code-copy-label">复制</span></button></div>${inner}</div>`;
};

const html = computed(() => {
  if (!props.text) return "";
  try {
    return marked.parse(props.text, { async: false, renderer } as any) as unknown as string;
  } catch {
    return props.text;
  }
});

const rootRef = ref<HTMLElement | null>(null);

const handleCopy = async (e: Event) => {
  const target = (e.target as HTMLElement)?.closest(".md-code-copy") as HTMLElement | null;
  if (!target) return;
  const raw = target.getAttribute("data-code");
  if (raw == null) return;
  const code = decodeURIComponent(raw);
  try {
    await navigator.clipboard.writeText(code);
    const label = target.querySelector(".md-code-copy-label");
    if (label) label.textContent = "已复制";
    target.classList.add("is-copied");
    const { $toast } = useNuxtApp();
    $toast?.success?.("代码已复制");
    setTimeout(() => {
      const l = target.querySelector(".md-code-copy-label");
      if (l) l.textContent = "复制";
      target.classList.remove("is-copied");
    }, 1500);
  } catch {
    const { $toast } = useNuxtApp();
    $toast?.error?.("复制失败");
  }
};

onMounted(() => {
  rootRef.value?.addEventListener("click", handleCopy);
});
onBeforeUnmount(() => {
  rootRef.value?.removeEventListener("click", handleCopy);
});
</script>

<template>
  <div ref="rootRef" class="agent-markdown markdown-body" v-html="html" />
</template>

<style scoped>
.agent-markdown {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-ink);
  word-break: break-word;
}

.agent-markdown :deep(p) {
  margin: 0 0 12px;
}

.agent-markdown :deep(p:last-child) {
  margin-bottom: 0;
}

.agent-markdown :deep(h1),
.agent-markdown :deep(h2),
.agent-markdown :deep(h3),
.agent-markdown :deep(h4) {
  font-weight: 600;
  margin: 20px 0 8px;
  color: var(--color-ink);
}

.agent-markdown :deep(h1) { font-size: 1.5em; }
.agent-markdown :deep(h2) { font-size: 1.3em; }
.agent-markdown :deep(h3) { font-size: 1.15em; }
.agent-markdown :deep(h4) { font-size: 1em; }

.agent-markdown :deep(ul),
.agent-markdown :deep(ol) {
  margin: 0 0 12px;
  padding-left: 24px;
}

.agent-markdown :deep(li) {
  margin: 4px 0;
}

.agent-markdown :deep(code) {
  font-family: "JetBrains Mono", "SF Mono", "Fira Code", ui-monospace, monospace;
  font-size: 0.88em;
  background: var(--color-surface-soft);
  border: 1px solid var(--color-hairline);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--color-ink);
}

.agent-markdown :deep(.md-code-block) {
  position: relative;
  margin: 0 0 12px;
  border-radius: 10px;
  overflow: hidden;
  background: var(--color-surface-dark);
}

.agent-markdown :deep(.md-code-toolbar) {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  background: var(--color-surface-dark-soft, #1f1e1b);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.agent-markdown :deep(.md-code-lang) {
  font-family: "JetBrains Mono", "SF Mono", ui-monospace, monospace;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  text-transform: lowercase;
  letter-spacing: 0.3px;
}

.agent-markdown :deep(.md-code-copy) {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: rgba(255, 255, 255, 0.6);
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.agent-markdown :deep(.md-code-copy:hover) {
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.9);
}

.agent-markdown :deep(.md-code-copy.is-copied) {
  color: #6fcf97;
}

.agent-markdown :deep(.md-code-copy-label) {
  line-height: 1;
}

.agent-markdown :deep(.md-code-block pre) {
  background: var(--color-surface-dark);
  border-radius: 0;
  padding: 16px;
  margin: 0;
  overflow-x: auto;
}

.agent-markdown :deep(pre) {
  background: var(--color-surface-dark);
  border-radius: 10px;
  padding: 16px;
  overflow-x: auto;
  margin: 0 0 12px;
}

.agent-markdown :deep(pre code) {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-on-dark);
  font-family: "JetBrains Mono", "SF Mono", "Fira Code", ui-monospace, monospace;
  font-size: 13px;
  line-height: 1.6;
}

.agent-markdown :deep(blockquote) {
  border-left: 3px solid var(--color-primary);
  margin: 0 0 12px;
  padding: 4px 16px;
  color: var(--color-body);
  background: var(--color-surface-soft);
  border-radius: 0 8px 8px 0;
}

.agent-markdown :deep(a) {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s;
}

.agent-markdown :deep(a:hover) {
  border-bottom-color: var(--color-primary);
}

.agent-markdown :deep(table) {
  border-collapse: collapse;
  margin: 0 0 12px;
  width: 100%;
  font-size: 14px;
}

.agent-markdown :deep(th),
.agent-markdown :deep(td) {
  border: 1px solid var(--color-hairline);
  padding: 8px 12px;
  text-align: left;
}

.agent-markdown :deep(th) {
  background: var(--color-surface-soft);
  font-weight: 600;
}

.agent-markdown :deep(hr) {
  border: none;
  border-top: 1px solid var(--color-hairline);
  margin: 16px 0;
}
</style>