style: 为拆解主体斑马纹空白行补充悬停背景

src/features/breakdown/BreakdownPage.test.ts

@@ -140,6 +140,29 @@ async function selectTab(label: string) {
 }
 
 describe('拆解页内容滚动', () => {
+    it.each(['人物', '场景', '道具'])('%s 使用共用斑马纹悬停样式，搜索后保持列表条目结构', async label => {
+        mountPage()
+        await selectTab(label)
+        const list = wrapper!.get('.subject-record-list')
+        expect(list.classes()).toContain('record-list')
+        expect(list.findAll(':scope > article')).toHaveLength(30)
+        await wrapper!.get('input[aria-label="搜索主体"]').setValue('主体 30')
+        expect(list.findAll(':scope > article')).toHaveLength(1)
+        expect(list.get(':scope > article h3').text()).toContain('主体 30')
+    })
+
+    it('只为主体斑马纹空白行添加主题化悬停底色，不覆盖已有条纹和操作状态', () => {
+        // DOM 环境无法模拟浏览器 :hover 命中；此项检查状态选择器与主题变量契约。
+        const css = readFileSync('src/styles.css', 'utf8')
+        expect(css).toMatch(/\.record-list > article:nth-child\(even\)\s*\{\s*background:\s*var\(--app-subtle\);/)
+        expect(css).toMatch(
+            /@media \(hover: hover\)\s*\{\s*\.subject-record-list > article:nth-child\(odd\):hover\s*\{\s*background:\s*var\(--app-control\);/
+        )
+        expect(css).toMatch(
+            /\.subject-record-list > article:nth-child\(odd\):focus-within\s*\{\s*background:\s*var\(--app-control\);/
+        )
+    })
+
     it('分镜选择与计数、入口同排，默认显示实际剧集，切换后内容和统计同步', async () => {
         const record = checkpoint()
         const result = record.state.breakdownResult!

src/features/breakdown/components/SubjectList.vue

@@ -30,7 +30,7 @@ const filtered = computed(() =>
                 ></NInput>
             </div>
         </div>
-        <div v-if="filtered.length" class="record-list">
+        <div v-if="filtered.length" class="record-list subject-record-list">
             <article v-for="subject in filtered" :key="subject.profileId" class="py-5 first:pt-0">
                 <div class="mb-3 flex flex-wrap items-center gap-3">
                     <h3 class="font-semibold">{{ subject.name }}</h3>

src/styles.css

@@ -204,6 +204,15 @@
     .record-list > article:nth-child(even) {
         background: var(--app-subtle);
     }
+    /* 主体斑马纹的空白行补充悬停／键盘焦点底色，不改变有底色行和其它列表。 */
+    .subject-record-list > article:nth-child(odd):focus-within {
+        background: var(--app-control);
+    }
+    @media (hover: hover) {
+        .subject-record-list > article:nth-child(odd):hover {
+            background: var(--app-control);
+        }
+    }
 
     .search-field {
         display: flex;