[变更性质] feat(frontend)

[新增功能] round3 页面组件全量迁移 shadcn-svelte（12 页面 + Modal/DatasetWizard/DatasetCard/Status）
[实现方案] .btn→Button、.banner→Alert、table.data→Table.Root、.badge→Badge、.tabs→Tabs.Root、.metric-card/form.card→Card.Root；ProjectStrategyTab div 配对修复
[影响范围] src/pages/*.svelte、src/components/*.svelte

1 files changed, 35 insertions, 48 deletions

diff --git a/frontend/src/components/ProjectMetricRow.svelte b/frontend/src/components/ProjectMetricRow.svelte
index 7980622..6dd3f0e 100644
--- a/frontend/src/components/ProjectMetricRow.svelte
+++ b/frontend/src/components/ProjectMetricRow.svelte
@@ -1,7 +1,8 @@
 <script lang="ts">
-  // 首页指标卡行（leader round2 spec §1）
+  // 首页指标卡行（round2 spec §1；round3 迁移 shadcn-svelte Card）
   // 数据通过 props 注入（ProjectsPage 拉取并共享聚合输入，见 dashboardMetrics.ts）。
   import { aggregateDashboard } from '../lib/dashboardMetrics';
+  import * as Card from '$lib/components/ui/card';
 
   interface Props {
     /** 注入的聚合输入；null/undefined 视为"取不到"（占位 -） */
@@ -15,33 +16,34 @@
   const metric = $derived(aggregateDashboard({ projects, datasets, runs, usage }));
 </script>
 
-<div class="metric-row" role="list" aria-label="工作台概览">
-  <div class="metric-card" data-testid="metric-card" role="listitem">
-    <span class="mlabel">我的项目</span>
-    <span class="mvalue">{metric.projectCount}</span>
+  <div class="metric-row" role="list" aria-label="工作台概览">
+    <Card.Root class="metric-r3" size="sm" data-testid="metric-card" role="listitem">
+      <span class="mlabel">我的项目</span>
+      <span class="mvalue">{metric.projectCount}</span>
+    </Card.Root>
+    <Card.Root class="metric-r3" size="sm" data-testid="metric-card" role="listitem">
+      <span class="mlabel">数据集</span>
+      <span class="mvalue">{metric.datasetCount}</span>
+    </Card.Root>
+    <Card.Root class="metric-r3" size="sm" data-testid="metric-card" role="listitem">
+      <span class="mlabel">回测</span>
+      <span class="mvalue">
+        <span class="run-split"><i>运行中</i> {metric.runningRuns}</span>
+        <span class="run-split"><i>已完成</i> {metric.doneRuns}</span>
+      </span>
+    </Card.Root>
+    <Card.Root
+      class="metric-r3"
+      size="sm"
+      data-testid="metric-card"
+      role="listitem"
+      data-todo={metric.usageLabel === '-' ? 'TODO: /api/ai/usage 未返回 totals.requests（使用记录为空）时保持占位 -' : undefined}
+    >
+      <span class="mlabel">AI 用量</span>
+      <span class="mvalue">{metric.usageLabel}</span>
+      {#if metric.usageTokens}<span class="mvalue-sub">{metric.usageTokens}</span>{/if}
+    </Card.Root>
   </div>
-  <div class="metric-card" data-testid="metric-card" role="listitem">
-    <span class="mlabel">数据集</span>
-    <span class="mvalue">{metric.datasetCount}</span>
-  </div>
-  <div class="metric-card" data-testid="metric-card" role="listitem">
-    <span class="mlabel">回测</span>
-    <span class="mvalue">
-      <span class="run-split"><i>运行中</i> {metric.runningRuns}</span>
-      <span class="run-split"><i>已完成</i> {metric.doneRuns}</span>
-    </span>
-  </div>
-  <div
-    class="metric-card"
-    data-testid="metric-card"
-    role="listitem"
-    data-todo={metric.usageLabel === '-' ? 'TODO: /api/ai/usage 未返回 totals.requests（使用记录为空）时保持占位 -' : undefined}
-  >
-    <span class="mlabel">AI 用量</span>
-    <span class="mvalue">{metric.usageLabel}</span>
-    {#if metric.usageTokens}<span class="mvalue-sub">{metric.usageTokens}</span>{/if}
-  </div>
-</div>
 
 <style>
   .metric-row {
@@ -50,26 +52,12 @@
     gap: 0.6rem;
     margin-bottom: 1.1rem;
   }
-  .metric-card {
-    background: var(--surface);
-    border: 1px solid var(--border);
-    border-radius: calc(var(--radius) * 1.4);
-    padding: 0.65rem 0.85rem;
-    display: flex;
-    flex-direction: column;
-    gap: 0.1rem;
+  .metric-row :global(.metric-r3) {
+    gap: 0.12rem;
     min-width: 0;
-    transition: box-shadow 150ms ease, transform 150ms ease;
   }
-  /* 桌面端 hover 轻微上浮阴影 */
-  @media (hover: hover) and (min-width: 768px) {
-    .metric-card:hover {
-      box-shadow: var(--shadow);
-      transform: translateY(-1px);
-    }
-  }
-  .metric-card .mvalue {
-    font-size: 1.35rem;
+  .metric-row :global(.metric-r3 .mvalue) {
+    font-size: 1.5rem;
     font-weight: 700;
     letter-spacing: -0.01em;
     color: var(--foreground);
@@ -77,7 +65,6 @@
     line-height: 1.2;
     overflow-wrap: anywhere;
   }
-  .run-split { display: inline-flex; align-items: baseline; gap: 0.3rem; }
-  .run-split i { font-style: normal; font-size: 0.68rem; color: var(--text-3); font-weight: 500; }
-  .mvalue-sub { font-size: 0.72rem; color: var(--text-3); }
+
+  .mvalue-sub { color: var(--text-3); }
 </style>