feat(web): badge and title episode rows on the player page

[WarlaxZ]

Summary

• The /play/ page's episode list ("up next" / "all episodes") showed raw filenames end to end, which meant reading through every torrent uploader's naming conventions just to tell episodes apart.
• Each row now leads with a coloured S05E04-style badge (or S03 for a season-pack file with no episode number), and shows the episode's own title (e.g. "King of Hell") when the filename names one — falling back to the original full filename + size when nothing reliable can be extracted.
• The list also gets a heading for the show/film itself (e.g. "The Boys"), pulled from the same parseRelease the breadcrumb already uses.

Test plan

• npm test — all pass (3360 tests)
• npm run typecheck — clean
• npm run lint — only the known pre-existing App.tsx warning
• npm run build — web bundle builds clean
• New unit tests in upNext.test.ts covering badge formatting, episode-title extraction, the fallback path, and the show-title heading
• Visually checked the rendered rows/badges/heading against a real season's episode names in a browser