feat(comparison-records): 展示 LLM token(入/出)与按单价估算成本

比价记录页新增 Token 列与成本列;顶部输入框配置每百万 token 单价(localStorage 持久化),仅前端估算不入库。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/(main)/comparison-records/page.tsx

@@ -28,6 +28,16 @@ const STUCK_LABEL: Record<string, string> = {
 const fmtMs = (ms: number | null) => (ms == null ? '-' : `${(ms / 1000).toFixed(1)}s`);
 const cents = (c: number | null) => (c == null ? '-' : yuan(c));
 
+// LLM 成本估算:(input + output) token / 1e6 × 每百万 token 单价(元)。单价由页面输入框配置(localStorage)。
+const calcCost = (inTok: number | null, outTok: number | null, price: number | null): number | null => {
+  if (price == null || Number.isNaN(price)) return null;
+  if (inTok == null && outTok == null) return null;
+  return (((inTok ?? 0) + (outTok ?? 0)) / 1_000_000) * price;
+};
+const fmtCost = (c: number | null) => (c == null ? '-' : `¥${c.toFixed(4)}`);
+const fmtTok = (inTok: number | null, outTok: number | null) =>
+  inTok == null && outTok == null ? '-' : `${inTok ?? 0}/${outTok ?? 0}`;
+
 // LLM message content 常是 json.dumps 的卡片列表;能 parse 成 JSON 就缩进展开,否则原样。
 function pretty(s: string | null): string {
   if (!s) return '';
@@ -50,6 +60,18 @@ export default function ComparisonRecordsPage() {
   const [phone, setPhone] = useState('');
   const [status, setStatus] = useState<string | undefined>();
   const [applied, setApplied] = useState<Record<string, unknown>>({});
+  // LLM 单价(元/百万 token),本地持久化;仅用于前端估算成本,不入库、不影响其它页面
+  const [pricePerMTok, setPricePerMTok] = useState<number | null>(() => {
+    if (typeof window === 'undefined') return null;
+    const v = localStorage.getItem('llm_price_per_mtok');
+    return v != null && v !== '' ? Number(v) : null;
+  });
+  const onPriceChange = (v: number | null) => {
+    setPricePerMTok(v);
+    if (typeof window === 'undefined') return;
+    if (v == null) localStorage.removeItem('llm_price_per_mtok');
+    else localStorage.setItem('llm_price_per_mtok', String(v));
+  };
 
   const { items, total, page, pageSize, loading, onChange } =
     usePagedList<ComparisonRecordListItem>('/admin/api/comparison-records', applied);
@@ -120,6 +142,18 @@ export default function ComparisonRecordsPage() {
       width: 50,
       render: (v: number | null) => (v ? <span style={{ color: '#cf1322' }}>{v}</span> : v ?? '-'),
     },
+    {
+      title: 'Token(入/出)',
+      key: 'tokens',
+      width: 110,
+      render: (_, r) => fmtTok(r.input_tokens, r.output_tokens),
+    },
+    {
+      title: '成本',
+      key: 'cost',
+      width: 90,
+      render: (_, r) => fmtCost(calcCost(r.input_tokens, r.output_tokens, pricePerMTok)),
+    },
     {
       title: '机型/ROM',
       key: 'device',
@@ -172,6 +206,15 @@ export default function ComparisonRecordsPage() {
         />
         <Button type="primary" onClick={search}>查询</Button>
         <Button onClick={reset}>重置</Button>
+        <InputNumber
+          placeholder="LLM 单价"
+          value={pricePerMTok}
+          onChange={onPriceChange}
+          min={0}
+          step={0.1}
+          style={{ width: 210 }}
+          addonAfter="元/百万token"
+        />
       </Space>
 
       <Table
@@ -187,7 +230,7 @@ export default function ComparisonRecordsPage() {
           showTotal: (t) => `共 ${t} 条`,
           onChange,
         }}
-        scroll={{ x: 1320 }}
+        scroll={{ x: 1520 }}
         onRow={(r) => ({ onClick: () => openDetail(r.id), style: { cursor: 'pointer' } })}
       />
 
@@ -204,6 +247,17 @@ export default function ComparisonRecordsPage() {
               <Descriptions.Item label="耗时">{fmtMs(detail.total_ms)}</Descriptions.Item>
               <Descriptions.Item label="步数">{detail.step_count ?? '-'}</Descriptions.Item>
               <Descriptions.Item label="LLM 次数/重试">{detail.llm_call_count ?? '-'} / {detail.retry_count ?? '-'}</Descriptions.Item>
+              <Descriptions.Item label="Token(入/出/合计)">
+                {detail.input_tokens == null && detail.output_tokens == null
+                  ? '-'
+                  : `${detail.input_tokens ?? 0} / ${detail.output_tokens ?? 0} / ${(detail.input_tokens ?? 0) + (detail.output_tokens ?? 0)}`}
+              </Descriptions.Item>
+              <Descriptions.Item label="估算成本">
+                {fmtCost(calcCost(detail.input_tokens, detail.output_tokens, pricePerMTok))}
+                {pricePerMTok == null && (detail.input_tokens != null || detail.output_tokens != null)
+                  ? <span style={{ color: '#999', fontSize: 12 }}>（顶部填 LLM 单价后显示）</span>
+                  : null}
+              </Descriptions.Item>
               <Descriptions.Item label="源平台">{detail.source_platform_name || '-'}（{cents(detail.source_price_cents)}）</Descriptions.Item>
               <Descriptions.Item label="最优">{detail.best_platform_name || '-'}（{cents(detail.best_price_cents)}）</Descriptions.Item>
               <Descriptions.Item label="省" span={2}>{cents(detail.saved_amount_cents)}{detail.is_source_best ? '（源平台最便宜）' : ''}</Descriptions.Item>

src/lib/types.ts

@@ -261,6 +261,8 @@ export interface ComparisonRecordListItem {
   step_count: number | null;
   llm_call_count: number | null;
   retry_count: number | null;
+  input_tokens: number | null;
+  output_tokens: number | null;
   device_model: string | null;
   rom_vendor: string | null;
   rom_name: string | null;