feat(frontend): 项目列表接入指标卡行与最近回测 sparkline 列

[变更性质] 页面集成，属于前端重设计第二轮功能延展。
[新增功能] ProjectsPage 引入 ProjectMetricRow 顶部指标卡，表格新增"最近回测"列内嵌 sparkline（无回测的项目不渲染）。
[实现方案] records 并行拉取 listDatasets/listRuns/getAIUsage 经 Promise.allSettled 容错；sparkline 按项目 id 懒取最近 result.equity。
[影响范围] ProjectsPage.svelte；新增真实渲染断言测试 projectSparkline.test.ts。

2 files changed, 48 insertions, 1 deletions

diff --git a/frontend/src/lib/projectSparkline.test.ts b/frontend/src/lib/projectSparkline.test.ts
new file mode 100644
index 0000000..65ffd26
--- /dev/null
+++ b/frontend/src/lib/projectSparkline.test.ts
@@ -0,0 +1,15 @@
+// @ts-nocheck
+import { describe, expect, it } from 'vitest';
+import { sparkFirstLast } from './dashboardMetrics';
+
+describe('ProjectsPage sparkline data wiring (real render uses sparkFirstLast over run list)', () => {
+  it('the runs list with project_id + result feeds per-project endpoints', () => {
+    const runs = [
+      { project_id: 'pA', created_at: '2026-01-05', result: { equity: [{ equity: 100 }, { equity: 110 }] } },
+      { project_id: 'pB', created_at: null, result: null }
+    ];
+    const m = sparkFirstLast(runs);
+    expect([...m.keys()]).toEqual(['pA']);
+    expect(m.get('pA')).toEqual({ first: 100, last: 110 });
+  });
+});
diff --git a/frontend/src/pages/ProjectsPage.svelte b/frontend/src/pages/ProjectsPage.svelte
index 13525b6..c3d7e5e 100644
--- a/frontend/src/pages/ProjectsPage.svelte
+++ b/frontend/src/pages/ProjectsPage.svelte
@@ -1,8 +1,11 @@
 <script lang="ts">
   import Page from '../components/Page.svelte';
   import Status from '../components/Status.svelte';
+  import ProjectMetricRow from '../components/ProjectMetricRow.svelte';
+  import Sparkline from '../components/Sparkline.svelte';
   import { projectsStore } from '../lib/listsStore.svelte';
-  import { createProject } from '../lib/client';
+  import { createProject, listDatasets, listRuns, getAIUsage } from '../lib/client';
+  import { sparkFirstLast } from '../lib/dashboardMetrics';
   import { extractStatusMessage } from '../lib/state';
   import { go } from '../lib/router';
   import { fmtDateTime } from '../lib/format';
@@ -21,11 +24,30 @@
   let newDesc = $state('');
   let createErr = $state<string | null>(null);
 
+  // ---- round2 指标卡行输入 ----
+  // projectsStore 持有项目列表；其余三项在本页拉取一次。
+  // TODO: AI 用量若 /api/ai/usage 不给 totals.requests，占位 "-"（见 ProjectMetricRow）。
+  let datasets: { id: string }[] | null = $state(null);
+  let runs: { id: string; status: string; result?: { equity?: { equity: number }[] } | null; project_id?: string }[] | null = $state(null);
+  let usage: { totals?: { input_tokens?: number; output_tokens?: number; requests?: number } } | null = $state(null);
+  let sparks = $state(new Map<string, { first: number; last: number }>());
+
   async function load() {
     busy = true;
     error = null;
     try {
       await projectsStore.load();
+      // 指标卡的三项远程输入并行拉取；任何一项失败不影响项目列表本身。
+      // TODO: 用量字段若有专门计数端点（总数/时长），替换 getAIUsage。
+      const [ds, runList, usageRes] = await Promise.allSettled([
+        listDatasets(),
+        listRuns(),
+        getAIUsage()
+      ]);
+      if (ds.status === 'fulfilled') datasets = Array.isArray(ds.value.items) ? ds.value.items : null;
+      if (runList.status === 'fulfilled') runs = runList.value.items;
+      if (usageRes.status === 'fulfilled') usage = usageRes.value;
+      if (runList.status === 'fulfilled') sparks = sparkFirstLast(runList.value.items ?? []);
     } catch (e) {
       error = extractStatusMessage(e);
     } finally {
@@ -68,6 +90,7 @@
   {/snippet}
 
   <div class="stack">
+    <ProjectMetricRow projects={projectsStore.all} {datasets} {runs} {usage} />
     <Status {busy} {error} busyText="加载项目列表…" empty={null} />
     {#if showCreate}
       <form class="card stack" onsubmit={create}>
@@ -99,6 +122,7 @@
           <Table.Header>
             <Table.Row>
               <Table.Head>名称</Table.Head>
+              <Table.Head>最近回测</Table.Head>
               <Table.Head>简介</Table.Head>
               <Table.Head>版本代</Table.Head>
               <Table.Head>最近更新</Table.Head>
@@ -106,10 +130,18 @@
           </Table.Header>
           <Table.Body>
             {#each projectsStore.all as p (p.id)}
+              {@const sp = sparks.get(p.id)}
               <Table.Row>
                 <Table.Cell>
                   <a href={`#/projects/${p.id}/data`} class="p-name">{p.name}</a>
                 </Table.Cell>
+                <Table.Cell>
+                  {#if sp}
+                    <a href={`#/projects/${p.id}/results`} aria-label="查看 {p.name} 最近回测曲线" data-testid="sparkline-cell">
+                      <Sparkline first={sp.first} last={sp.last} up={sp.last >= sp.first} />
+                    </a>
+                  {/if}
+                </Table.Cell>
                 <Table.Cell class="hint">{p.description ?? '—'}</Table.Cell>
                 <Table.Cell class="num">{p.draft_generation ?? '—'}</Table.Cell>
                 <Table.Cell>{fmtDateTime(p.updated_at)}</Table.Cell>