Revert "Add missing admin action files and navigation links"

This reverts commit 41be6835bf.

src/app/admin/catalog/[id]/catalog-items-table/song-picker.tsx

@@ -1,94 +0,0 @@
-'use client'
-
-import { Loader2, Music } from 'lucide-react'
-import { useEffect, useState } from 'react'
-import {
-  Select,
-  SelectContent,
-  SelectItem,
-  SelectTrigger,
-  SelectValue,
-} from '@/components/ui/select'
-import {
-  getCachedSongPickerOptions,
-  loadSongPickerOptions,
-  type SoundtrackOption,
-} from '@/lib/client-cache/song-picker-cache'
-
-// Re-export so existing `import { invalidateSongPickerCache } from '.../song-picker'`
-// callsites keep working. New code should import from the lib module directly.
-export { invalidateSongPickerCache } from '@/lib/client-cache/song-picker-cache'
-
-interface Props {
-  value: number
-  onChange: (id: number) => void
-  disabled?: boolean
-}
-
-function formatLength(seconds: number): string {
-  if (!seconds || seconds <= 0) return ''
-  const m = Math.floor(seconds / 60)
-  const s = seconds % 60
-  return `${m}:${String(s).padStart(2, '0')}`
-}
-
-export function SongPicker({ value, onChange, disabled }: Props) {
-  const initial = getCachedSongPickerOptions()
-  const [options, setOptions] = useState<SoundtrackOption[]>(initial ?? [])
-  const [loading, setLoading] = useState(!initial)
-
-  useEffect(() => {
-    if (getCachedSongPickerOptions()) return
-    let cancelled = false
-    loadSongPickerOptions()
-      .then((items) => {
-        if (!cancelled) setOptions(items)
-      })
-      .catch(() => {
-        if (!cancelled) setOptions([])
-      })
-      .finally(() => {
-        if (!cancelled) setLoading(false)
-      })
-    return () => {
-      cancelled = true
-    }
-  }, [])
-
-  return (
-    <Select
-      value={String(value)}
-      onValueChange={(v) => onChange(parseInt(v, 10) || 0)}
-      disabled={disabled || loading}
-    >
-      <SelectTrigger>
-        {loading ? (
-          <span className="flex items-center gap-2 text-muted-foreground">
-            <Loader2 className="h-3 w-3 animate-spin" /> Loading…
-          </span>
-        ) : (
-          <SelectValue placeholder="No song" />
-        )}
-      </SelectTrigger>
-      <SelectContent>
-        <SelectItem value="0">
-          <span className="text-muted-foreground">— No song —</span>
-        </SelectItem>
-        {options.map((opt) => (
-          <SelectItem key={opt.id} value={String(opt.id)}>
-            <span className="inline-flex items-center gap-2">
-              <Music className="h-3 w-3 text-muted-foreground" />
-              <span className="font-medium">{opt.name}</span>
-              {opt.author && <span className="text-xs text-muted-foreground">— {opt.author}</span>}
-              {opt.length > 0 && (
-                <span className="text-xs text-muted-foreground font-mono">
-                  {formatLength(opt.length)}
-                </span>
-              )}
-            </span>
-          </SelectItem>
-        ))}
-      </SelectContent>
-    </Select>
-  )
-}