优化界面，优化多版本切换逻辑

web/src/utils/mediaVersion.test.ts

@@ -1,4 +1,10 @@
-import { mediaVersionLabel } from './mediaVersion.ts'
+import {
+  isStrmMedia,
+  mediaVersionFileName,
+  mediaVersionLabel,
+  mediaVersionMatches,
+  mediaVersionSourceLabel,
+} from './mediaVersion.ts'
 import type { Media } from '../types/index.ts'
 
 function check(name: string, condition: boolean) {
@@ -41,4 +47,21 @@ const dottedPart = mediaVersionLabel(media({
 }))
 check('part2 filename fallback keeps part token', dottedPart.includes('part2'))
 
+// 折叠后的选集行 id 是最优版本；播放中的可能是组内另一个版本。
+const local4k = media({ id: 'v-4k', path: '/media/Inception.2010.2160p.mkv', height: 2160 })
+const local1080 = media({ id: 'v-1080', path: '/media/Inception.2010.1080p.mkv', height: 1080 })
+const cloudRow = media({ id: 'v-cloud', path: '/strm/Inception.2010.mkv.strm', strm_url: '/api/strm/play/cloud115/video.mkv?pickcode=a' })
+const groupedRow = media({ id: 'v-4k', versions: [local4k, local1080, cloudRow] })
+
+check('matches own id', mediaVersionMatches(groupedRow, 'v-4k'))
+check('matches nested version id', mediaVersionMatches(groupedRow, 'v-1080'))
+check('rejects unrelated id', !mediaVersionMatches(groupedRow, 'v-other'))
+check('rejects empty id', !mediaVersionMatches(groupedRow, ''))
+
+check('strm is cloud source', mediaVersionSourceLabel(cloudRow) === '云端直链')
+check('mkv is local source', mediaVersionSourceLabel(local1080) === '本地文件')
+check('strm filename drops outer extension', mediaVersionFileName(cloudRow) === 'Inception.2010.mkv')
+check('missing path has no filename', mediaVersionFileName(media({ path: '' })) === '')
+check('isStrmMedia detects strm url', isStrmMedia(cloudRow))
+
 console.log('mediaVersion.test.ts: ok')