feat: 完成 issue #169 [B3] 对话助手重构——消息流+模型选择+引用溯源+离线降级
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<script setup lang="ts">
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/**
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* 对话助手（Epic #163 / issue #169 [B3]）
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* 对齐旧 web/chat/assistant.js：
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* - 消息列表 + 输入区（AntD）
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* - infer.ts chat completions + 模型选择（/v1/models）
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* - citations.json 引用来源展示（PRD 5.4 溯源）
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* - 网关离线/dry-run 降级提示
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*/
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import { computed, onMounted, ref } from 'vue';
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import { ask, fetchHealth, fetchModels } from '#/api/iaop/infer';
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interface Msg {
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role: 'user' | 'assistant';
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content: string;
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meta?: Record<string, unknown>;
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citations?: string[];
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}
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const messages = ref<Msg[]>([
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{ role: 'assistant', content: '你好，我是 iAOP 工艺助手。可查询工艺规程、报警解释、交接班要点（PRD 5.4）。' },
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]);
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const input = ref('');
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const loading = ref(false);
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const models = ref<string[]>([]);
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const model = ref('');
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const offline = ref(false);
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const citations = ref<Record<string, string[]>>({});
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const listRef = ref<HTMLElement | null>(null);
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onMounted(async () => {
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try {
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models.value = await fetchModels();
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model.value = models.value[0] || '';
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const h = await fetchHealth();
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offline.value = !h;
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} catch {
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offline.value = true;
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}
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try {
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const resp = await fetch('/iaop/citations.json');
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const d = await resp.json();
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citations.value = (d as { documents?: Record<string, string[]> }).documents || {};
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} catch {
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citations.value = {};
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}
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});
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const scrollBottom = () => {
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setTimeout(() => {
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if (listRef.value) listRef.value.scrollTop = listRef.value.scrollHeight;
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}, 50);
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};
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async function send() {
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const q = input.value.trim();
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if (!q || loading.value) return;
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messages.value.push({ role: 'user', content: q });
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input.value = '';
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loading.value = true;
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scrollBottom();
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try {
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const r = await ask(q, { model: model.value, maxTokens: 512 });
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const meta = (r.meta || {}) as Record<string, unknown>;
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offline.value = Boolean(meta.dry_run);
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// 引用溯源：按关键词在 citations 文档中检索（演示：命中即附来源）
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const hits = Object.keys(citations.value).filter((k) =>
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q.includes(k) || k.split('·')[0].length > 0 && q.includes(k.split('·')[0]),
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).slice(0, 3);
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messages.value.push({ role: 'assistant', content: r.text, meta, citations: hits });
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} catch {
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offline.value = true;
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messages.value.push({ role: 'assistant', content: '推理服务请求失败，请检查网关（/v1/health）。' });
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} finally {
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loading.value = false;
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scrollBottom();
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}
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}
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</script>
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<template>
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<div class="chat-page">
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<div class="chat-head">
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<h1>iAOP 对话助手</h1>
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<div class="chat-opts">
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<a-select v-model:value="model" style="width: 220px" placeholder="模型">
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<a-select-option v-for="m in models" :key="m" :value="m">{{ m }}</a-select-option>
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</a-select>
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<a-tag :color="offline ? 'red' : 'green'">
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{{ offline ? '网关离线 / dry-run' : '网关在线' }}
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</a-tag>
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</div>
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</div>
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<a-alert v-if="offline" type="warning" show-icon style="margin-bottom: 12px">
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<template #message>推理服务离线或 dry-run 占位：回答可能为占位内容（未连接上游推理服务）。</template>
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</a-alert>
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<div ref="listRef" class="chat-list">
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<div v-for="(m, i) in messages" :key="i" class="chat-row" :class="'role-' + m.role">
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<div class="bubble">
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<div class="bubble-text">{{ m.content }}</div>
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<div v-if="m.citations && m.citations.length" class="citations">
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<span v-for="c in m.citations" :key="c" class="cit-tag">📄 {{ c }}</span>
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</div>
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</div>
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</div>
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<div v-if="loading" class="chat-row role-assistant">
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<div class="bubble bubble-loading">思考中…</div>
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</div>
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</div>
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<div class="chat-input-row">
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<a-input
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v-model:value="input"
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placeholder="输入工艺问题，Enter 发送（如：氯化炉温异常如何处理？）"
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@press-enter="send"
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/>
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<a-button type="primary" :loading="loading" @click="send">发送</a-button>
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</div>
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</div>
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</template>
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<style scoped>
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.chat-page {
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max-width: 900px;
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margin: 0 auto;
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padding: 12px;
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display: flex;
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flex-direction: column;
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height: calc(100vh - 150px);
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}
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.chat-head {
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display: flex;
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justify-content: space-between;
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align-items: center;
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margin-bottom: 10px;
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}
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.chat-head h1 {
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font-size: 18px;
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margin: 0;
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}
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.chat-opts {
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display: flex;
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gap: 10px;
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align-items: center;
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}
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.chat-list {
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flex: 1;
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overflow: auto;
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background: rgba(0, 0, 0, 0.02);
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border-radius: 8px;
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padding: 12px;
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}
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.chat-row {
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display: flex;
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margin-bottom: 10px;
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}
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.role-user {
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justify-content: flex-end;
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}
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.bubble {
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max-width: 78%;
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padding: 9px 12px;
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border-radius: 10px;
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font-size: 14px;
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line-height: 1.7;
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background: #fff;
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border: 1px solid rgba(0, 0, 0, 0.08);
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}
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.role-user .bubble {
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background: #1677ff;
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color: #fff;
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border-color: transparent;
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}
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.bubble-loading {
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color: #999;
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}
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.citations {
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margin-top: 6px;
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}
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.cit-tag {
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display: inline-block;
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font-size: 11px;
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color: #1677ff;
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background: rgba(22, 119, 255, 0.08);
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border-radius: 10px;
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padding: 2px 8px;
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margin-right: 6px;
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}
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.chat-input-row {
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display: flex;
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gap: 8px;
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margin-top: 12px;
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}
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</style>
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