fix(douban): classify tv search results correctly

[Astro-Han]

Description

Fix douban search so TV series results returned from movie search are classified as tvshow instead of always inheriting the search type movie.

Related issue: #978

Type of Change

• 🐛 Bug fix
• ✨ New feature
• 🌐 New site adapter
• 📝 Documentation
• ♻️ Refactor
• 🔧 CI / build / tooling

Checklist

• I ran the checks relevant to this PR
• I updated tests or docs if needed
• I included output or screenshots when useful

Documentation (if adding/modifying an adapter)

• Added doc page under docs/adapters/ (if new adapter)
• Updated docs/adapters/index.md table (if new adapter)
• Updated sidebar in docs/.vitepress/config.mts (if new adapter)
• Updated README.md / README.zh-CN.md when command discoverability changed
• Used positional args for the command's primary subject unless a named flag is clearly better
• Normalized expected adapter failures to CliError subclasses instead of raw Error

Screenshots / Output

Relevant verification:

node dist/src/main.js validate
# PASS

npx tsc --noEmit
# PASS

npx vitest run --project adapter clis/douban/*.test.js
# PASS

Note: npm test currently fails on an unrelated existing adapter test:

clis/zsxq/topic.test.js > zsxq topic command > maps topic detail 404 responses to NOT_FOUND before fetching comments
TypeError: Cannot read properties of undefined (reading 'status')