add movies and tv show library types with Jellyfin NFO support

- Add `movies` type: per-movie folders with video files, poster/backdrop
  images, and optional Jellyfin NFO metadata (title, year, plot, rating,
  genres, runtime). Grid view with 2:3 poster art, detail modal with play
  and two-click delete of the movie folder.
- Add `tv` type: Series -> Season -> Episode hierarchy with lazy loading at
  each level. Reads tvshow.nfo and episodedetails NFO files for metadata.
  Episode grid with video thumbnails, streams via existing video player.
  Delete is limited to the entire series folder to avoid breaking Jellyfin.
- Add fast-xml-parser dependency for Kodi/Jellyfin NFO parsing (lib/nfo.ts)
- Migrate existing DB to expand the libraries CHECK constraint to include
  the two new types; migration is idempotent and preserves existing data.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/movies.ts

@@ -0,0 +1,110 @@
+import fs from 'fs'
+import path from 'path'
+import type { Movie } from '@/types'
+import { parseMovieNfo } from './nfo'
+
+const HIDDEN_FILES = /^\./
+
+const VIDEO_EXTENSIONS = new Set(['.mkv', '.mp4', '.avi', '.mov', '.m4v', '.wmv', '.ts', '.m2ts'])
+
+function fileApiUrl(libraryId: string, relativePath: string): string {
+  return `/api/file?libraryId=${encodeURIComponent(libraryId)}&path=${encodeURIComponent(relativePath)}`
+}
+
+function thumbnailApiUrl(libraryId: string, relativePath: string): string {
+  return `/api/thumbnail?libraryId=${encodeURIComponent(libraryId)}&path=${encodeURIComponent(relativePath)}`
+}
+
+/**
+ * Finds the first file in a directory whose basename (without extension)
+ * matches the given pattern (case-insensitive).
+ */
+function findFile(dir: string, pattern: RegExp): string | null {
+  let entries: string[]
+  try {
+    entries = fs.readdirSync(dir)
+  } catch {
+    return null
+  }
+  return entries.find(
+    (e) => !HIDDEN_FILES.test(e) && pattern.test(path.basename(e, path.extname(e)))
+  ) ?? null
+}
+
+function findVideoFile(dir: string): string | null {
+  let entries: string[]
+  try {
+    entries = fs.readdirSync(dir)
+  } catch {
+    return null
+  }
+  return entries.find(
+    (e) => !HIDDEN_FILES.test(e) && VIDEO_EXTENSIONS.has(path.extname(e).toLowerCase())
+  ) ?? null
+}
+
+function findNfoFile(dir: string, dirName: string): string | null {
+  // Try {dirName}.nfo first, then movie.nfo, then any .nfo
+  const candidates = [`${dirName}.nfo`, 'movie.nfo']
+  let entries: string[]
+  try {
+    entries = fs.readdirSync(dir)
+  } catch {
+    return null
+  }
+  for (const candidate of candidates) {
+    if (entries.find((e) => e.toLowerCase() === candidate.toLowerCase())) {
+      return entries.find((e) => e.toLowerCase() === candidate.toLowerCase())!
+    }
+  }
+  return entries.find((e) => path.extname(e).toLowerCase() === '.nfo') ?? null
+}
+
+export function scanMoviesLibrary(libraryRoot: string, libraryId: string): Movie[] {
+  let dirs: string[]
+  try {
+    dirs = fs
+      .readdirSync(libraryRoot, { withFileTypes: true })
+      .filter((d) => d.isDirectory() && !HIDDEN_FILES.test(d.name))
+      .map((d) => d.name)
+  } catch {
+    return []
+  }
+
+  const movies: Movie[] = []
+
+  for (const dirName of dirs) {
+    const moviePath = path.join(libraryRoot, dirName)
+
+    const videoFile = findVideoFile(moviePath)
+    if (!videoFile) continue
+
+    const nfoFile = findNfoFile(moviePath, dirName)
+    const nfo = nfoFile ? parseMovieNfo(path.join(moviePath, nfoFile)) : null
+
+    const posterFile = findFile(moviePath, /^(poster|cover|folder)$/i)
+    const backdropFile = findFile(moviePath, /^(backdrop|fanart|background)$/i)
+
+    const id = encodeURIComponent(dirName)
+    const videoRelPath = path.join(dirName, videoFile)
+
+    movies.push({
+      id,
+      title: nfo?.title ?? dirName,
+      year: nfo?.year ?? null,
+      plot: nfo?.plot ?? null,
+      rating: nfo?.rating ?? null,
+      genres: nfo?.genres ?? [],
+      runtime: nfo?.runtime ?? null,
+      posterUrl: posterFile
+        ? thumbnailApiUrl(libraryId, path.join(dirName, posterFile))
+        : null,
+      backdropUrl: backdropFile
+        ? fileApiUrl(libraryId, path.join(dirName, backdropFile))
+        : null,
+      videoPath: videoRelPath,
+    })
+  }
+
+  return movies.sort((a, b) => a.title.localeCompare(b.title))
+}