refactor(api): F.50 — extract 7 small domain modules (#615)

Seven domain-eng splits peel ~200 LOC of read endpoints out of
`api/subsonic.ts`:

- `subsonicStreamUrl.ts` — `buildStreamUrl`, `coverArtCacheKey`,
  `buildCoverArtUrl`, `buildDownloadUrl` (token-signed URL builders
  for the four /rest endpoints we hand to the browser).
- `subsonicStarRating.ts` — `getStarred`, `star`, `unstar`,
  `setRating`, `probeEntityRatingSupport`. `setRating` still triggers
  the lazy `navidromeBrowse` cache invalidation; the same-folder
  lazy import path is preserved.
- `subsonicSearch.ts` — `search`, `searchSongsPaged`.
- `subsonicScrobble.ts` — `scrobbleSong`, `reportNowPlaying`,
  `getNowPlaying`.
- `subsonicAlbumInfo.ts` — `getAlbumInfo2`.
- `subsonicLyrics.ts` — `getLyricsBySongId`.
- `subsonicGenres.ts` — `getGenres`, `getAlbumsByGenre`.

63 external call sites migrated to direct imports. Four `vi.mock`
targets in the store-level tests pointed at `../api/subsonic` and
were updated to the new module paths.

Pure code-move. subsonic.ts: 762 → 561 LOC (−201).

src/components/AlbumCard.tsx

@@ -1,3 +1,4 @@
+import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonicStreamUrl';
 import { getAlbum } from '../api/subsonicLibrary';
 import type { SubsonicAlbum } from '../api/subsonicTypes';
 import { songToTrack } from '../utils/songToTrack';
@@ -5,7 +6,6 @@ import React, { memo, useMemo } from 'react';
 import { useNavigate } from 'react-router-dom';
 import { Play, ListPlus, HardDriveDownload, Check } from 'lucide-react';
 import { useTranslation } from 'react-i18next';
-import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonic';
 import { usePlayerStore } from '../store/playerStore';
 import { useOfflineStore } from '../store/offlineStore';
 import { useAuthStore } from '../store/authStore';

src/components/AlbumHeader.tsx

@@ -1,8 +1,8 @@
+import { buildCoverArtUrl } from '../api/subsonicStreamUrl';
 import type { EntityRatingSupportLevel, SubsonicSong } from '../api/subsonicTypes';
 import React, { useMemo, useState } from 'react';
 import { useNavigate } from 'react-router-dom';
 import { Play, Heart, ExternalLink, X, ChevronLeft, Download, ListPlus, HardDriveDownload, Share2, Highlighter, Loader2, Shuffle } from 'lucide-react';
-import { buildCoverArtUrl } from '../api/subsonic';
 import CachedImage from './CachedImage';
 import CoverLightbox from './CoverLightbox';
 import { useTranslation } from 'react-i18next';

src/components/ArtistCardLocal.tsx

@@ -1,6 +1,6 @@
+import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonicStreamUrl';
 import type { SubsonicArtist } from '../api/subsonicTypes';
 import React, { useMemo } from 'react';
-import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonic';
 import { useNavigate } from 'react-router-dom';
 import { Users } from 'lucide-react';
 import { useTranslation } from 'react-i18next';

src/components/BecauseYouLikeRail.tsx

@@ -1,3 +1,4 @@
+import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonicStreamUrl';
 import { getArtist, getArtistInfo } from '../api/subsonicArtists';
 import { getAlbum } from '../api/subsonicLibrary';
 import type { SubsonicAlbum } from '../api/subsonicTypes';
@@ -6,7 +7,6 @@ import React, { memo, useEffect, useMemo, useRef, useState } from 'react';
 import { useNavigate } from 'react-router-dom';
 import { useTranslation } from 'react-i18next';
 import { Play, ListPlus, Music } from 'lucide-react';
-import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonic';
 import CachedImage, { useCachedUrl } from './CachedImage';
 import { usePlayerStore } from '../store/playerStore';
 import { useAuthStore } from '../store/authStore';

src/components/ContextMenu.tsx

@@ -1,3 +1,5 @@
+import { buildDownloadUrl } from '../api/subsonicStreamUrl';
+import { star, unstar, setRating } from '../api/subsonicStarRating';
 import { getAlbum } from '../api/subsonicLibrary';
 import { getSimilarSongs2, getSimilarSongs, getTopSongs, getArtist } from '../api/subsonicArtists';
 import type { SubsonicAlbum, SubsonicArtist, SubsonicPlaylist } from '../api/subsonicTypes';
@@ -17,7 +19,7 @@ import StarRating from './StarRating';
 import { lastfmLoveTrack, lastfmUnloveTrack } from '../api/lastfm';
 import { usePlayerStore } from '../store/playerStore';
 import { useShallow } from 'zustand/react/shallow';
-import { star, unstar, buildDownloadUrl, getPlaylists, getPlaylist, updatePlaylist, setRating } from '../api/subsonic';
+import { getPlaylists, getPlaylist, updatePlaylist } from '../api/subsonic';
 import { useNavigate } from 'react-router-dom';
 import { useAuthStore } from '../store/authStore';
 import { useDownloadModalStore } from '../store/downloadModalStore';

src/components/FullscreenPlayer.tsx

@@ -1,3 +1,5 @@
+import { star, unstar } from '../api/subsonicStarRating';
+import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonicStreamUrl';
 import { getArtistInfo } from '../api/subsonicArtists';
 import { getPlaybackProgressSnapshot, subscribePlaybackProgress } from '../store/playbackProgress';
 import React, { useCallback, useEffect, useState, useRef, memo, useMemo } from 'react';
@@ -7,7 +9,6 @@ import {
   Moon, Sunrise,
 } from 'lucide-react';
 import { usePlayerStore } from '../store/playerStore';
-import { buildCoverArtUrl, coverArtCacheKey, star, unstar } from '../api/subsonic';
 import { useCachedUrl } from './CachedImage';
 import { getCachedBlob } from '../utils/imageCache';
 import { extractCoverColors } from '../utils/dynamicColors';

src/components/GenreFilterBar.tsx

@@ -1,8 +1,8 @@
+import { getGenres } from '../api/subsonicGenres';
 import React, { useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react';
 import { createPortal } from 'react-dom';
 import { Check, Filter, X } from 'lucide-react';
 import { useTranslation } from 'react-i18next';
-import { getGenres } from '../api/subsonic';
 
 interface GenreFilterBarProps {
   selected: string[];

src/components/Hero.tsx

@@ -1,10 +1,10 @@
+import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonicStreamUrl';
 import { getRandomAlbums, getAlbum } from '../api/subsonicLibrary';
 import type { SubsonicAlbum } from '../api/subsonicTypes';
 import { songToTrack } from '../utils/songToTrack';
 import React, { useEffect, useState, useRef, useCallback, useMemo } from 'react';
 import { useNavigate } from 'react-router-dom';
 import { Play, ListPlus } from 'lucide-react';
-import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonic';
 import CachedImage, { useCachedUrl } from './CachedImage';
 import { usePlayerStore } from '../store/playerStore';
 import { useTranslation } from 'react-i18next';

src/components/HostApprovalQueue.tsx

@@ -1,3 +1,4 @@
+import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonicStreamUrl';
 import { getSong } from '../api/subsonicLibrary';
 import type { SubsonicSong } from '../api/subsonicTypes';
 import { useEffect, useMemo, useState } from 'react';
@@ -9,7 +10,6 @@ import {
   declineOrbitSuggestion,
   suggestionKey,
 } from '../utils/orbit';
-import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonic';
 import CachedImage from './CachedImage';
 import { ORBIT_DEFAULT_SETTINGS } from '../api/orbit';
 

src/components/LiveSearch.tsx

@@ -1,9 +1,10 @@
+import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonicStreamUrl';
+import { search } from '../api/subsonicSearch';
 import type { SearchResults, SubsonicArtist } from '../api/subsonicTypes';
 import { songToTrack } from '../utils/songToTrack';
 import React, { useState, useEffect, useRef, useCallback, useMemo } from 'react';
 import { useNavigate } from 'react-router-dom';
 import { Search, Disc3, Users, Music, TextSearch } from 'lucide-react';
-import { search, buildCoverArtUrl, coverArtCacheKey } from '../api/subsonic';
 import { usePlayerStore } from '../store/playerStore';
 import { useAuthStore } from '../store/authStore';
 import { useTranslation } from 'react-i18next';

src/components/MiniContextMenu.tsx

@@ -1,9 +1,9 @@
+import { star, unstar } from '../api/subsonicStarRating';
 import { useEffect, useRef, useState } from 'react';
 import { createPortal } from 'react-dom';
 import { emit } from '@tauri-apps/api/event';
 import { useTranslation } from 'react-i18next';
 import { Play, Trash2, Disc3, User, Heart, Info } from 'lucide-react';
-import { star, unstar } from '../api/subsonic';
 import type { MiniTrackInfo } from '../utils/miniPlayerBridge';
 
 interface Props {

src/components/MiniPlayer.tsx

@@ -1,3 +1,4 @@
+import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonicStreamUrl';
 import React, { useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react';
 import { createPortal } from 'react-dom';
 import { emit, listen } from '@tauri-apps/api/event';
@@ -5,7 +6,6 @@ import { invoke } from '@tauri-apps/api/core';
 import { useTranslation } from 'react-i18next';
 import { Play, Pause, SkipBack, SkipForward, Pin, PinOff, Maximize2, X, ListMusic, Volume2, VolumeX, Shuffle, Infinity as InfinityIcon, Waves, MoveRight } from 'lucide-react';
 import CachedImage from './CachedImage';
-import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonic';
 import { usePlayerStore } from '../store/playerStore';
 import { useAuthStore } from '../store/authStore';
 import { useKeybindingsStore, matchInAppBinding } from '../store/keybindingsStore';

src/components/MobilePlayerView.tsx

@@ -1,3 +1,5 @@
+import { star, unstar } from '../api/subsonicStarRating';
+import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonicStreamUrl';
 import type { Track } from '../store/playerStoreTypes';
 import { getPlaybackProgressSnapshot, subscribePlaybackProgress } from '../store/playbackProgress';
 import React, { useState, useCallback, useMemo, useRef, useEffect, useSyncExternalStore, CSSProperties } from 'react';
@@ -9,7 +11,6 @@ import {
   Moon, Sunrise,
 } from 'lucide-react';
 import { usePlayerStore } from '../store/playerStore';
-import { buildCoverArtUrl, coverArtCacheKey, star, unstar } from '../api/subsonic';
 import { useCachedUrl } from './CachedImage';
 import LyricsPane from './LyricsPane';
 import { usePlaybackDelayPress } from '../hooks/usePlaybackDelayPress';

src/components/MobileSearchOverlay.tsx

@@ -1,10 +1,11 @@
+import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonicStreamUrl';
+import { search } from '../api/subsonicSearch';
 import type { SearchResults, SubsonicArtist } from '../api/subsonicTypes';
 import { songToTrack } from '../utils/songToTrack';
 import React, { useState, useEffect, useRef, useCallback, useMemo } from 'react';
 import { createPortal } from 'react-dom';
 import { useNavigate } from 'react-router-dom';
 import { X, Search, Disc3, Users, Music, Music2, Clock, ChevronRight } from 'lucide-react';
-import { search, buildCoverArtUrl, coverArtCacheKey } from '../api/subsonic';
 import { usePlayerStore } from '../store/playerStore';
 import { useAuthStore } from '../store/authStore';
 import { useTranslation } from 'react-i18next';

src/components/NowPlayingDropdown.tsx

@@ -1,8 +1,9 @@
+import { buildCoverArtUrl } from '../api/subsonicStreamUrl';
+import { getNowPlaying } from '../api/subsonicScrobble';
 import type { SubsonicNowPlaying } from '../api/subsonicTypes';
 import React, { useState, useEffect, useRef, useCallback, useLayoutEffect } from 'react';
 import { createPortal } from 'react-dom';
 import { PlayCircle, User, Radio, RefreshCw } from 'lucide-react';
-import { getNowPlaying, buildCoverArtUrl } from '../api/subsonic';
 import { useAuthStore } from '../store/authStore';
 import { usePlayerStore } from '../store/playerStore';
 import { useTranslation } from 'react-i18next';

src/components/OrbitGuestQueue.tsx

@@ -1,10 +1,10 @@
+import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonicStreamUrl';
 import { getSong } from '../api/subsonicLibrary';
 import type { SubsonicSong } from '../api/subsonicTypes';
 import { useEffect, useMemo, useState } from 'react';
 import { Radio, Clock } from 'lucide-react';
 import { useTranslation } from 'react-i18next';
 import { useOrbitStore } from '../store/orbitStore';
-import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonic';
 import CachedImage from './CachedImage';
 import OrbitQueueHead from './OrbitQueueHead';
 

src/components/PlayerBar.tsx

@@ -1,3 +1,5 @@
+import { star, unstar, setRating } from '../api/subsonicStarRating';
+import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonicStreamUrl';
 import type { SubsonicAlbum } from '../api/subsonicTypes';
 import { getPlaybackProgressSnapshot, subscribePlaybackProgress } from '../store/playbackProgress';
 import React, { memo, useCallback, useEffect, useMemo, useRef, useState } from 'react';
@@ -12,7 +14,6 @@ import { usePlayerStore } from '../store/playerStore';
 import { useShallow } from 'zustand/react/shallow';
 import { useAuthStore } from '../store/authStore';
 import { useThemeStore } from '../store/themeStore';
-import { buildCoverArtUrl, coverArtCacheKey, star, unstar, setRating } from '../api/subsonic';
 import CachedImage from './CachedImage';
 import WaveformSeek from './WaveformSeek';
 import Equalizer from './Equalizer';

src/components/QueuePanel.tsx

@@ -1,3 +1,4 @@
+import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonicStreamUrl';
 import { getAlbum } from '../api/subsonicLibrary';
 import type { SubsonicPlaylist } from '../api/subsonicTypes';
 import { registerQueueListScrollTopReader, consumePendingQueueListScrollTop } from '../store/queueUndo';
@@ -11,7 +12,7 @@ import OrbitGuestQueue from './OrbitGuestQueue';
 import OrbitQueueHead from './OrbitQueueHead';
 import HostApprovalQueue from './HostApprovalQueue';
 import { Play, Music, Star, X, Trash2, Save, FolderOpen, Shuffle, Infinity, Waves, MicVocal, ListMusic, Check, ListPlus, MoveRight, Radio, HardDrive, ChevronDown, Info, Share2 } from 'lucide-react';
-import { buildCoverArtUrl, coverArtCacheKey, getPlaylists, getPlaylist, updatePlaylist, deletePlaylist } from '../api/subsonic';
+import { getPlaylists, getPlaylist, updatePlaylist, deletePlaylist } from '../api/subsonic';
 import { usePlaylistStore } from '../store/playlistStore';
 import { useCachedUrl } from './CachedImage';
 import { useTranslation } from 'react-i18next';

src/components/SongCard.tsx

@@ -1,10 +1,10 @@
+import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonicStreamUrl';
 import type { SubsonicSong } from '../api/subsonicTypes';
 import { songToTrack } from '../utils/songToTrack';
 import React, { memo, useMemo } from 'react';
 import { useNavigate } from 'react-router-dom';
 import { Play, ListPlus, Star } from 'lucide-react';
 import { useTranslation } from 'react-i18next';
-import { buildCoverArtUrl, coverArtCacheKey } from '../api/subsonic';
 import { usePlayerStore } from '../store/playerStore';
 import CachedImage from './CachedImage';
 import { enqueueAndPlay } from '../utils/playSong';

src/components/VirtualSongList.tsx

@@ -1,10 +1,10 @@
+import { searchSongsPaged } from '../api/subsonicSearch';
 import type { SubsonicSong } from '../api/subsonicTypes';
 import React, { useCallback, useEffect, useRef, useState } from 'react';
 import { useRefElementClientHeight } from '../hooks/useResizeClientHeight';
 import { Search as SearchIcon, X } from 'lucide-react';
 import { useTranslation } from 'react-i18next';
 import { useVirtualizer } from '@tanstack/react-virtual';
-import { searchSongsPaged } from '../api/subsonic';
 import { ndListSongs } from '../api/navidromeBrowse';
 import SongRow, { SongListHeader } from './SongRow';