feat(frontend): 结果/实验/策略/数据页迁移 shadcn 与新 Chart API

[变更性质]
四个业务标签页与数据集卡片迁移 shadcn 组件，图表消费切换到
layerchart 长格式 API，功能与数据语义不变。

[新增功能]
结果页权益曲线（策略权益/现金/基准，基准可缺省）与回撤曲线（desc
面积）改由 Chart.svelte data/series 渲染；实验记录页多回测归一对比
曲线改为快速长格式行构造。空数据行允许 undefined 列（基准缺口），
Chart data 类型放宽 [key:string]: string|number|undefined。

[实现方案]
RunsPage：查看入口改 shadcn Button（href 语义保留 hash 路由），
对比图数据由 compareOption（echarts option）化为 compare。
ProjectResultsTab：图表开关、日志折叠用 Button；equityData/
drawdownData $derived 计算峰值回撤。ProjectStrategyTab：快照输入、
冲突/AI/版本操作迁移 Button/Input。ProjectDataTab 与 DatasetCard：
shadcn 组件 + 保留 banner error/warn/info、retry-row 等 legacy class，
"使用相同请求重新获取"重试入口与 onRecreated 逻辑不变，配套
datasetCardRetry/datasetCardWarnings/projectDataTabRecreated 回归
测试。resultsAccounting.test.ts：layerchart 在 jsdom 挂载约 3 秒，
suite 全量下易撞默认 5s 超时，首测提高至 20s。

[影响范围]
npm run check 0 error、58 tests 全绿、npm run build 通过；真浏览器
375/768/1440 图表页零溢出（artifacts/ui-shadcn 截图与探针 JSON）。

4 files changed, 92 insertions, 119 deletions

diff --git a/frontend/src/pages/ProjectDataTab.svelte b/frontend/src/pages/ProjectDataTab.svelte
index e3b1923..284aec7 100644
--- a/frontend/src/pages/ProjectDataTab.svelte
+++ b/frontend/src/pages/ProjectDataTab.svelte
@@ -5,6 +5,7 @@
   import { listDatasets } from '../lib/client';
   import { extractStatusMessage } from '../lib/state';
   import type { Dataset } from '../lib/types';
+  import { Button } from '$lib/components/ui/button';
 
   interface Props {
     projectId?: string;
@@ -17,7 +18,7 @@
   let error: string | null = $state(null);
   // svelte-ignore state_referenced_locally
   let wizardOpen = $state(showWizard);
-  
+
 
   let refreshTimer: ReturnType<typeof setInterval> | null = null;
 
@@ -61,9 +62,9 @@
 <div class="stack">
   {#if wizardOpen}
     <DatasetWizard onCreated={() => void load()} />
-    <button class="btn ghost" onclick={() => (wizardOpen = false)}>收起新建面板</button>
+    <Button variant="ghost" size="sm" onclick={() => (wizardOpen = false)}>收起新建面板</Button>
   {:else}
-    <button class="btn primary" onclick={() => (wizardOpen = true)}>新建数据集</button>
+    <Button size="sm" class="w-fit" onclick={() => (wizardOpen = true)}>新建数据集</Button>
   {/if}
 
   <h2>我的数据集</h2>
@@ -79,7 +80,7 @@
 
   {#if !busy && !error && items.length > 0}
     {#each items as ds (ds.id)}
-      <DatasetCard dsId={ds.id} />
+      <DatasetCard dsId={ds.id} onRecreated={() => void load()} />
     {/each}
   {/if}
 </div>
diff --git a/frontend/src/pages/ProjectResultsTab.svelte b/frontend/src/pages/ProjectResultsTab.svelte
index 4149213..5ff03c0 100644
--- a/frontend/src/pages/ProjectResultsTab.svelte
+++ b/frontend/src/pages/ProjectResultsTab.svelte
@@ -1,8 +1,8 @@
 <script lang="ts">
   import Status from '../components/Status.svelte';
   import Chart from '../components/Chart.svelte';
-  import type { EChartsOption, LineSeriesOption } from 'echarts';
-import { listRuns, getRun } from '../lib/client';
+  import { Button } from '$lib/components/ui/button';
+  import { listRuns, getRun } from '../lib/client';
   import { extractStatusMessage } from '../lib/state';
   import {
     fmtDateTime,
@@ -55,73 +55,42 @@ import { listRuns, getRun } from '../lib/client';
   const result = $derived<BacktestResult | null>(run?.result ?? null);
   const hasEquity = $derived(!!result && result.equity.length > 0);
 
-  const equityOption: EChartsOption = $derived.by(() => {
-    if (!result || !hasEquity) return {};
-    const dates = result.equity.map((p) => p.date);
-    const series: LineSeriesOption[] = [
-      {
-        name: "策略权益",
-        type: "line" as const,
-        data: result.equity.map((p) => p.equity),
-        showSymbol: false,
-        lineStyle: { width: 1.6 },
-        itemStyle: { color: "#0f766e" }
-      },
-      {
-        name: "现金",
-        type: "line" as const,
-        data: result.equity.map((p) => p.cash),
-        showSymbol: false,
-        lineStyle: { type: "dashed", opacity: 0.65 },
-        itemStyle: { color: "#94a3b8" }
-      }
+  // long-format rows for the layerchart renderer ({ i, date, ...columns })
+  const equityData = $derived.by(() => {
+    if (!result || !hasEquity) return [];
+    return result.equity.map((p, i) => ({
+      i,
+      date: p.date,
+      equity: p.equity,
+      cash: p.cash,
+      benchmark: p.benchmark ?? undefined
+    }));
+  });
+
+  const hasBench = $derived(equityData.some((r) => r.benchmark !== undefined && r.benchmark !== null));
+
+  const equitySeries = $derived.by(() => {
+    if (!result || !hasEquity) return [];
+    const s = [
+      { key: 'equity', label: '策略权益', value: 'equity', color: '#0f766e' },
+      { key: 'cash', label: '现金', value: 'cash', color: '#94a3b8', dashed: true }
     ];
-    const bench = result.equity.map((p) => (p.benchmark === null || p.benchmark === undefined ? null : p.benchmark));
-    if (bench.some((x) => x !== null && x !== undefined)) {
-      series.push({
-        name: "基准",
-        type: "line" as const,
-        data: bench as number[],
-        showSymbol: false,
-        itemStyle: { color: "#eab308" }
-      });
-    }
-    return {
-      title: { text: undefined },
-      legend: { top: 0 },
-      grid: { top: 32, left: 60, right: 24, bottom: 54 },
-      tooltip: { trigger: "axis" },
-      xAxis: { type: "category", data: dates },
-      yAxis: { type: "value", scale: true, name: "金额" },
-      series
-    };
+    if (hasBench) s.push({ key: 'benchmark', label: '基准', value: 'benchmark', color: '#eab308' });
+    return s;
   });
 
-  const drawdownOption: EChartsOption = $derived.by(() => {
-    if (!result || !hasEquity) return {};
-    const dates = result.equity.map((p) => p.date);
+  const drawdownData = $derived.by(() => {
+    if (!result || !hasEquity) return [];
     let peak = -Infinity;
-    const dd = result.equity.map((p) => {
+    return result.equity.map((p, i) => {
       peak = Math.max(peak, p.equity);
-      return -((peak - p.equity) / peak) * 100;
+      return { i, date: p.date, dd: -((peak - p.equity) / peak) * 100 };
     });
-    return {
-      grid: { top: 24, left: 60, right: 24, bottom: 54 },
-      tooltip: { trigger: "axis", valueFormatter: (v) => `${(v as number).toFixed(2)}%` },
-      xAxis: { type: "category", data: dates },
-      yAxis: { type: "value", name: "回撤 %", max: 0 },
-      series: [
-        {
-          name: "回撤",
-          type: "line" as const,
-          data: dd,
-          showSymbol: false,
-          areaStyle: { color: "rgba(30, 74, 66, 0.25)" },
-          lineStyle: { width: 1 },
-          itemStyle: { color: "#134e4a" }
-        }
-      ]
-    };
+  });
+
+  const drawdownSeries = $derived.by(() => {
+    if (!result || !hasEquity) return [];
+    return [{ key: 'dd', label: '回撤', value: 'dd', color: '#134e4a', area: true }];
   });
 
   function switchToRun(id: string) {
@@ -220,13 +189,13 @@ import { listRuns, getRun } from '../lib/client';
 
       <div class="card stack">
         <div class="row">
-          <button class="btn small" aria-pressed={chartMode === "equity"} onclick={() => (chartMode = "equity")}>权益曲线（{result.equity.length} 点）</button>
-          <button class="btn small" aria-pressed={chartMode === "drawdown"} onclick={() => (chartMode = "drawdown")}>回撤曲线</button>
+          <Button variant={chartMode === "equity" ? "default" : "outline"} size="sm" aria-pressed={chartMode === "equity"} onclick={() => (chartMode = "equity")}>权益曲线（{result.equity.length} 点）</Button>
+          <Button variant={chartMode === "drawdown" ? "default" : "outline"} size="sm" aria-pressed={chartMode === "drawdown"} onclick={() => (chartMode = "drawdown")}>回撤曲线</Button>
         </div>
         {#if chartMode === "equity"}
-          <Chart option={equityOption} ariaLabel="策略权益曲线" height={340} />
+          <Chart data={equityData} series={equitySeries} ariaLabel="策略权益曲线" height={340} />
         {:else}
-          <Chart option={drawdownOption} ariaLabel="回撤曲线" height={300} />
+          <Chart data={drawdownData} series={drawdownSeries} ariaLabel="回撤曲线" height={300} />
         {/if}
       </div>
 
@@ -273,10 +242,9 @@ import { listRuns, getRun } from '../lib/client';
           </div>
           <div>
             <h3>策略日志</h3>
-            <button class="btn small" onclick={() => (logsOpen = !logsOpen)} aria-expanded={logsOpen}>
+            <Button variant="outline" size="sm" onclick={() => (logsOpen = !logsOpen)} aria-expanded={logsOpen}>
               {logsOpen ? "收起日志" : `展开日志（${result.logs.length} 行）`}
-            </button>
-            {#if logsOpen}
+            </Button>            {#if logsOpen}
               <pre class="logs">{result.logs.join("\n")}</pre>
             {/if}
           </div>
diff --git a/frontend/src/pages/ProjectStrategyTab.svelte b/frontend/src/pages/ProjectStrategyTab.svelte
index 5f2e242..0df9f1a 100644
--- a/frontend/src/pages/ProjectStrategyTab.svelte
+++ b/frontend/src/pages/ProjectStrategyTab.svelte
@@ -3,6 +3,8 @@
   import CodeEditor from '../components/CodeEditor.svelte';
   import DiffView from '../components/DiffView.svelte';
   import Modal from '../components/Modal.svelte';
+  import { Button } from '$lib/components/ui/button';
+  import { Input } from '$lib/components/ui/input';
   import { projectsStore } from '../lib/listsStore.svelte';
   import {
     getProject,
@@ -274,7 +276,7 @@
       </p>
       <CodeEditor value={code} onInput={onEditorInput} readOnly={false} label="策略源码" height={430} />
       <div class="spread wrap">
-        <input
+        <Input
           bind:value={snapshotMessage}
           placeholder="快照说明，例如：加入RSI过滤器（可选）"
           style="flex:2 1 240px"
@@ -282,16 +284,16 @@
             if (ev.key === 'Enter') void snapshot();
           }}
         />
-        <button class="btn" disabled={snapshotBusy} onclick={snapshot}>
+        <Button disabled={snapshotBusy} onclick={snapshot}>
           {snapshotBusy ? '创建快照…' : '保存版本快照'}
-        </button>
-        <button
-          class="btn"
+        </Button>
+        <Button
+          variant="outline"
           onclick={() => versions[1] && void compareWithDraft(versions[1])}
           disabled={!versions[1]}
         >
           草稿与上一快照对比
-        </button>
+        </Button>
       </div>
       <Status busy={false} error={snapshotErr} empty={snapshotMsg} />
 
@@ -304,8 +306,8 @@
         </div>
         <DiffView before={conflictServer.code} after={code} beforeLabel="服务器" afterLabel="本机" />
         <div class="row">
-          <button class="btn primary" onclick={keepMine}>保留本机修改（覆盖服务器）</button>
-          <button class="btn" onclick={loadServer}>采用服务器版本</button>
+          <Button onclick={keepMine}>保留本机修改（覆盖服务器）</Button>
+          <Button variant="outline" onclick={loadServer}>采用服务器版本</Button>
         </div>
       {/if}
     </div>
@@ -316,9 +318,9 @@
         <label for="ai-instruction">希望 AI 帮你做什么？<span class="hint">例如：把均线周期改为两个可调参数并解释影响</span></label>
         <textarea id="ai-instruction" rows="3" bind:value={instruction} placeholder="描述对策略的修改意图，AI 返回完整新源码与差异预览"></textarea>
         <div class="row">
-          <button class="btn primary" disabled={aiBusy || !instruction.trim()} onclick={askAI}>
+          <Button disabled={aiBusy || !instruction.trim()} onclick={askAI}>
             {aiBusy ? 'AI 处理中…' : '获取建议'}
-          </button>
+          </Button>
         </div>
         {#if aiErr}
           <div class="banner error" role="alert">
@@ -341,15 +343,14 @@
             <h3>与当前草稿的差异</h3>
             <DiffView before={code} after={aiResult.proposed_code} beforeLabel="当前草稿" afterLabel="AI 建议" />
             <div class="row">
-              <button
-                class="btn primary"
+              <Button
                 disabled={aiAcceptBusy}
                 onclick={acceptAI}
                 title={aiResult.base_generation !== baseGeneration ? '草稿代已变化，建议如需采用请重新获取' : ''}
               >
                 {aiAcceptBusy ? '接受中…' : '接受为新版本'}
-              </button>
-              <button class="btn ghost" disabled={aiAcceptBusy} onclick={discardAI}>放弃建议</button>
+              </Button>
+              <Button variant="ghost" disabled={aiAcceptBusy} onclick={discardAI}>放弃建议</Button>
               {#if aiResult.base_generation !== baseGeneration}
                 <span class="banner warn" role="alert">草稿代 {aiResult.base_generation} 与当前 {baseGeneration} 不一致，接受会失败；请重新发起说明</span>
               {/if}
@@ -395,11 +396,11 @@
                   <td><span class="badge grey">{versionSourceLabel[v.source]}</span></td>
                   <td>
                     <div class="row">
-                      <button class="btn small" onclick={() => void compareWithDraft(v)}>对比当前</button>
+                      <Button variant="outline" size="sm" onclick={() => void compareWithDraft(v)}>对比当前</Button>
                       {#if i + 1 < versions.length}
-                        <button class="btn small" onclick={() => void compareTwoVersions(i)}>与相邻旧版对比</button>
+                        <Button variant="outline" size="sm" onclick={() => void compareTwoVersions(i)}>与相邻旧版对比</Button>
                       {/if}
-                      <button class="btn small" onclick={() => void restore(v)}>恢复为新草稿</button>
+                      <Button size="sm" onclick={() => void restore(v)}>恢复为新草稿</Button>
                     </div>
                   </td>
                 </tr>
diff --git a/frontend/src/pages/RunsPage.svelte b/frontend/src/pages/RunsPage.svelte
index bd77892..154fd67 100644
--- a/frontend/src/pages/RunsPage.svelte
+++ b/frontend/src/pages/RunsPage.svelte
@@ -2,7 +2,7 @@
   import Page from '../components/Page.svelte';
   import Status from '../components/Status.svelte';
   import Chart from '../components/Chart.svelte';
-  import type { EChartsOption } from 'echarts';
+  import { Button } from '$lib/components/ui/button';
   import { listRuns } from '../lib/client';
   import { extractStatusMessage } from '../lib/state';
   import { fmtDateTime, runStatusLabel, runStatusBadge, fmtPct, fmtNum, formatMoney } from '../lib/format';
@@ -40,31 +40,34 @@
     else chosenIds = [...chosenIds.slice(-3), id];
   }
 
-  const compareOption: EChartsOption = $derived.by(() => {
-    if (comparable.length === 0) return {};
-    const series = comparable.map((r, idx) => {
-      const eq = r.result?.equity ?? [];
-      const base = eq[0]?.equity ?? 1;
-      const colors = ['#0f766e', '#b45309', '#1d4ed8', '#8b1d8b'];
-      return {
-        name: `Run ${r.id.slice(0, 6)}.`,
-        type: 'line' as const,
-        data: eq.map((p) => p.equity / base),
-        showSymbol: false,
-        lineStyle: { width: 1.5 },
-        itemStyle: { color: colors[idx % colors.length] }
-      };
-    });
-    let xLen = Math.max(...comparable.map((r) => (r.result?.equity ?? []).length), 0);
-    const longest = comparable.reduce((best, r) => ((r.result?.equity ?? []).length > best.length ? r.result!.equity : best), [] as { date: string }[]);
-    return {
-      legend: { top: 0 },
-      grid: { top: 32, left: 64, right: 20, bottom: 50 },
-      tooltip: { trigger: 'axis' },
-      xAxis: { type: 'category', data: longest.map((p) => p.date) },
-      yAxis: { type: 'value', scale: true, name: '归一净值' },
-      series
-    };
+  // long-format rows for the layerchart renderer: one row per index, one
+  // column per selected run, first-day-normalized equity
+  const compare = $derived.by(() => {
+    if (comparable.length === 0) return { data: [], series: [] };
+    const colors = ['#0f766e', '#b45309', '#1d4ed8', '#8b1d8b'];
+    const flat = comparable.map((r, i) => ({
+      run: r,
+      eq: r.result?.equity ?? [],
+      key: `s${i}`,
+      color: colors[i % colors.length]
+    }));
+    const len = Math.max(0, ...flat.map((f) => f.eq.length));
+    const data: { [key: string]: string | number; i: number }[] = [];
+    for (let i = 0; i < len; i++) {
+      const row: { [key: string]: string | number; i: number } = { i, date: flat[0].eq[i]?.date ?? String(i) };
+      for (const f of flat) {
+        const base = f.eq[0]?.equity ?? 1;
+        if (f.eq[i]) row[f.key] = f.eq[i].equity / base;
+      }
+      data.push(row);
+    }
+    const series = flat.map((f) => ({
+      key: f.key,
+      label: `Run ${f.run.id.slice(0, 6)}.`,
+      value: f.key,
+      color: f.color
+    }));
+    return { data, series };
   });
 
   const configDiffRows = $derived.by(() => {
@@ -133,7 +136,7 @@
                 <td>{r.result ? fmtPct(r.result.metrics.total_return) : '—'}</td>
                 <td>{r.result ? fmtPct(r.result.metrics.max_drawdown) : '—'}</td>
                 <td>
-                  <a class="btn small" href={`#/projects/${r.project_id}/results?run=${r.id}`}>查看</a>
+                  <Button size="sm" variant="outline" href={`#/projects/${r.project_id}/results?run=${r.id}`}>查看</Button>
                 </td>
               </tr>
             {/each}
@@ -168,7 +171,7 @@
         {#if comparable.length > 1}
           <div class="card stack">
             <h2>收益曲线对齐比较（首日归一）</h2>
-            <Chart option={compareOption} ariaLabel="多回测对比曲线" height={340} />
+            <Chart data={compare.data} series={compare.series} ariaLabel="多回测对比曲线" height={340} />
             <p class="hint">起点对齐为 1，仅叠加不同起点的曲线时只在各自区间内展示。</p>
           </div>
         {:else}