refactor(settings,lib): home licensesData + userMgmtHelpers to owners

a11y-branch hold lifted (Frank: modals get re-refactored separately, no rebase to
protect). Both were only blocked by their modal consumers:
- licensesData (pure licenses.json lazy-loader) → features/settings/utils; main
  consumer is the settings LicensesPanel. JSON dynamic import absolutized to
  @/data/licenses.json.
- userMgmtHelpers (pure formatLastSeen, lib/format only) → lib/format; multi-feature
  consumer set, same class as playlistDetailHelpers.
Drains utils/componentHelpers (dir removed). Only import lines changed in the
LicenseTextModal/SongInfoModal consumers (logic untouched); tests pass unmodified.

src/features/album/components/TrackRow.tsx

@@ -12,7 +12,7 @@ import { previewInputFromSong, usePreviewStore } from '@/features/playback/store
 import StarRating from '@/ui/StarRating';
 import { codecLabel, type ColKey } from '@/features/album/utils/albumTrackListHelpers';
 import { formatLongDuration } from '@/lib/format/formatDuration';
-import { formatLastSeen } from '@/utils/componentHelpers/userMgmtHelpers';
+import { formatLastSeen } from '@/lib/format/userMgmtHelpers';
 import i18n from '@/lib/i18n';
 import { offlineActionPolicy, type OfflineActionPolicy } from '@/features/offline';
 import { resolveTrackArtistRefs } from '@/features/playback/utils/playback/trackArtistRefs';

src/features/favorites/components/FavoriteSongRow.tsx

@@ -4,7 +4,7 @@ import { AudioLines, ChevronRight, Play, Square, X } from 'lucide-react';
 import type { ColDef } from '@/hooks/useTracklistColumns';
 import type { SubsonicSong } from '@/lib/api/subsonicTypes';
 import { codecLabel } from '@/lib/format/playlistDetailHelpers';
-import { formatLastSeen } from '@/utils/componentHelpers/userMgmtHelpers';
+import { formatLastSeen } from '@/lib/format/userMgmtHelpers';
 import i18n from '@/lib/i18n';
 import { formatTrackTime } from '@/lib/format/formatDuration';
 import StarRating from '@/ui/StarRating';

src/features/playlist/components/PlaylistRow.tsx

@@ -4,7 +4,7 @@ import { AudioLines, ChevronRight, Heart, Play, Square, Trash2 } from 'lucide-re
 import type { ColDef } from '@/hooks/useTracklistColumns';
 import type { SubsonicSong } from '@/lib/api/subsonicTypes';
 import { codecLabel } from '@/lib/format/playlistDetailHelpers';
-import { formatLastSeen } from '@/utils/componentHelpers/userMgmtHelpers';
+import { formatLastSeen } from '@/lib/format/userMgmtHelpers';
 import i18n from '@/lib/i18n';
 import { formatTrackTime } from '@/lib/format/formatDuration';
 import StarRating from '@/ui/StarRating';

src/features/playlist/components/PlaylistSuggestions.tsx

@@ -13,7 +13,7 @@ import { usePlaylistLayoutStore } from '@/features/playlist/store/playlistLayout
 import { songToTrack } from '@/lib/media/songToTrack';
 import { getQueueTracksView } from '@/features/playback/store/queueTrackView';
 import { codecLabel } from '@/lib/format/playlistDetailHelpers';
-import { formatLastSeen } from '@/utils/componentHelpers/userMgmtHelpers';
+import { formatLastSeen } from '@/lib/format/userMgmtHelpers';
 import { formatTrackTime } from '@/lib/format/formatDuration';
 import i18n from '@/lib/i18n';
 

src/features/settings/components/LicensesPanel.tsx

@@ -8,7 +8,7 @@ import {
   loadLicensesData,
   type LicenseEntry,
   type LicensesData,
-} from '@/utils/licensesData';
+} from '@/features/settings/utils/licensesData';
 import LicenseTextModal from '@/components/LicenseTextModal';
 
 const ROW_HEIGHT = 56;

src/features/settings/components/userMgmt/UserMgmtRow.tsx

@@ -2,7 +2,7 @@ import React from 'react';
 import { Shield, Trash2, User, Wand2 } from 'lucide-react';
 import type { i18n as I18nType, TFunction } from 'i18next';
 import type { NdLibrary, NdUser } from '@/lib/api/navidromeAdmin';
-import { formatLastSeen } from '@/utils/componentHelpers/userMgmtHelpers';
+import { formatLastSeen } from '@/lib/format/userMgmtHelpers';
 
 interface Props {
   user: NdUser;

src/features/settings/utils/licensesData.ts

@@ -0,0 +1,57 @@
+// Lazy loader + types for the bundled `src/data/licenses.json` data.
+//
+// The JSON is generated by `node scripts/generate-licenses.mjs` (maintainer-only)
+// and committed to source. Vite bundles it as a separate JS chunk via dynamic
+// import below, so the heavy ~1–2 MB payload is only loaded when the user
+// actually opens the Open Source Licenses panel — no runtime fetch, the data
+// lives entirely inside the build artifact.
+
+export interface LicenseEntry {
+  name: string;
+  version: string;
+  source: 'npm' | 'cargo';
+  licenses: string[];
+  repository?: string;
+  homepage?: string;
+  description?: string;
+  publisher?: string;
+  licenseText?: string;
+}
+
+export interface LicensesData {
+  generatedAt: string;
+  project: { name: string; version: string };
+  stats: { npm: number; cargo: number; total: number; withFullText: number };
+  entries: LicenseEntry[];
+}
+
+let cache: Promise<LicensesData> | null = null;
+
+export function loadLicensesData(): Promise<LicensesData> {
+  if (cache) return cache;
+  cache = import('@/data/licenses.json')
+    .then((mod) => (mod.default ?? mod) as LicensesData)
+    .catch((e) => {
+      cache = null;
+      throw e;
+    });
+  return cache;
+}
+
+/**
+ * Curated list of dependency names shown in the highlight block at the top of
+ * the panel — the user-recognisable backbone of the app. Order matters here;
+ * the panel renders them top-to-bottom as listed.
+ */
+export const HIGHLIGHTED_DEPENDENCIES: Array<{ source: 'npm' | 'cargo'; name: string }> = [
+  { source: 'cargo', name: 'tauri' },
+  { source: 'npm', name: 'react' },
+  { source: 'npm', name: 'zustand' },
+  { source: 'cargo', name: 'rodio' },
+  { source: 'cargo', name: 'symphonia' },
+  { source: 'cargo', name: 'cpal' },
+  { source: 'npm', name: 'axios' },
+  { source: 'npm', name: '@tanstack/react-virtual' },
+  { source: 'npm', name: 'react-i18next' },
+  { source: 'npm', name: 'lucide-react' },
+];