feat(music-network): unified scrobble & enrichment framework (replaces hard-wired Last.fm) (#1066)

* feat(music-network): core domain types and wire contracts

Foundation for the Music Network framework: provider-agnostic domain
types, capability model, typed errors, and account shapes under
src/music-network/core, plus the ScrobbleWire / EnrichmentWire /
PresetManifest / AuthStrategy contracts. No runtime wiring yet.

* feat(music-network): generic audioscrobbler/listenbrainz/maloja transports

Generalize the Rust remote layer for the Music Network framework. Add
provider-agnostic transports parameterized by base_url:

- audioscrobbler_request: Audioscrobbler v2 with caller-supplied endpoint
  (Last.fm, Libre.fm, Rocksky, custom GNU FM, Maloja compat share it)
- listenbrainz_request: Token-header JSON (direct + Maloja LB compat)
- maloja_request: native /apis/mlj_1 JSON

lastfm_request stays as a thin transition delegate against the fixed
host; it is removed once the framework owns all call sites. Wiremock
tests cover audioscrobbler_request with a custom base_url and API-error
mapping.

* feat(music-network): audioscrobbler wire with last.fm + libre.fm presets

Add the Audioscrobbler v2 wire, the behavioural successor to the legacy
src/api/lastfm.ts, implementing the full EnrichmentWire surface (scrobble,
now playing, love/unlove, loved sync, similar artists, track/artist stats,
top lists, recent tracks, user profile, urls).

- client.ts: transport wrapper over audioscrobbler_request, classifying
  failures into MusicNetworkError without touching any store
- sign.ts: TS mirror of the api_sig base-string ordering rule (unit-tested)
- auth/tokenPoll.ts: browser token-poll connect flow as a reusable strategy
- presets/lastfm.ts, presets/librefm.ts: bundled, enrichment-capable,
  token-poll presets (both endpoints verified live)

Extends WireContext with profileBase and ConnectContext with authBase so
URL builders and connect flows need no preset lookup.

* feat(music-network): listenbrainz + maloja-native wires, paste-auth presets

Add the scrobble-destination wires and presets:

- ListenBrainz wire (scrobble + now playing via playing_now), backing both
  the direct api.listenbrainz.org preset and the Maloja /apis/listenbrainz
  compat preset (one wire, two presets, differing only by base URL)
- Maloja native wire (/apis/mlj_1/newscrobble, scrobble only — Maloja has
  no now-playing endpoint)
- Shared api_key_only paste-auth strategy (token/key/session-key paste);
  the Audioscrobbler wire now dispatches token-poll vs paste by preset
- Presets: listenbrainz, maloja_listenbrainz, maloja_native, rocksky
  (scrobble-only, session-key paste, bundled keys — verified live), and
  custom_gnufm (token-poll, user-supplied url/key/secret)
- Contracts: ConnectContext.authStrategy, PresetManifest.selfHostedApiSuffix

maloja_compat (the {url}/apis/audioscrobbler mode) is intentionally omitted:
its protocol cannot be verified and is almost certainly the legacy handshake,
not the 2.0 web API; Maloja is covered by the native and ListenBrainz modes.

* feat(music-network): registry, orchestrator, enrichment router + runtime facade

Wire the framework together behind a single facade:

- registry: wireRegistry (WireId -> wire), presetRegistry (the 7 built-in
  presets), registerBuiltinWires (one-time side-effect registration)
- CapabilityProbe: wire probe overlaid by manifest staticCapabilities as the
  final authority (lets two presets on one wire diverge, e.g. Rocksky's
  nowPlaying:false over the Audioscrobbler wire's optimistic yes)
- ScrobbleOrchestrator: best-effort fan-out; flips the per-account
  session-error flag on AUTH_SESSION_INVALID and clears it on next success
- EnrichmentRouter: resolves the single primary to its EnrichmentWire; the
  type guard rejects non-enrichment wires (Maloja/ListenBrainz)
- MusicNetworkRuntime: the only app entry point — accounts, roles, fan-out,
  enrichment, urls, probe. Reads/writes state through the MusicNetworkStore
  port (Phase 5 backs it with the auth store) and a RuntimeHost for side effects
- getMusicNetworkRuntime singleton + index.ts public barrel

Tests cover fan-out, master toggle, capability gating, session-error
flip/clear, primary eligibility, and enrichment routing.

* feat(music-network): auth-store state + lossless legacy migration + runtime bridge

Add the persisted Music Network state to the auth store and wire the runtime,
all additively — nothing existing breaks yet.

- authStoreTypes: musicNetworkAccounts / enrichmentPrimaryId /
  scrobblingMasterEnabled + actions; legacy lastfm* fields kept until Phase 6
- authMusicNetworkActions + defaults/wiring (synchronous localStorage)
- accountPersistence: migrateLegacyLastfm (lossless — preserves session key,
  username and scrobbling preference; fills bundled Last.fm key from the preset;
  sets the migrated account as enrichment primary) + sanitizeAccounts
- authStoreRehydrate: one-shot migration guarded by a sentinel so a later
  disconnect cannot resurrect the account from still-present legacy fields
- musicNetworkBridge: backs the MusicNetworkStore port with the auth store and
  the RuntimeHost with the Tauri shell; initialized in pre-React bootstrap

nowPlayingEnabled stays a global toggle (not a lastfm* field); the Phase 6
playback call-site will gate dispatchNowPlaying on it, preserving behaviour.

* feat(music-network): route playback, enrichment and love through the runtime

Migrate every Last.fm call-site onto the Music Network runtime, preserving
behaviour:

- playback (audioEventHandlers, playTrackAction): scrobble@50% and now-playing
  via dispatchScrobble/dispatchNowPlaying; loved-fetch via isTrackLoved. Now-
  playing follows scrobbling (as Last.fm did), Navidrome now-playing keeps the
  nowPlayingEnabled gate
- enrichment: useArtistSimilarArtists, useNowPlayingFetchers, Statistics, and
  the ArtistDetail similar-artists gate now use the runtime, gated on an
  enrichment primary
- love: PlayerBar, PlayerTrackInfo, all context menus, useNowPlayingStarLove and
  the startup loved-sync route through setTrackLoved / toggleNetworkLove
- player store: lastfmLoved/lastfmLovedCache -> networkLoved/networkLovedCache;
  lastfmActions -> networkLoveActions; loved cache storage renamed with a
  lossless legacy-key fallback
- getMusicNetworkRuntimeOrNull() for best-effort callers so they no-op (not
  throw) before the runtime is initialized

src/api/lastfm.ts and the Integrations UI still use the legacy path; they are
migrated and removed in the next phase.

* feat(music-network): manifest-driven Integrations UI + scrobble batch format

Replace the Last.fm Integrations card with a manifest-driven Music Network
section, and fix Audioscrobbler scrobbling to the batch/array shape.

- settings/musicNetwork/: MusicNetworkSection (master toggle, destination
  cards, enrichment-primary picker, Maloja proxy warning, add-a-service list)
  driven entirely off the preset registry; icon map from PresetManifest.icon
- IntegrationsTab delegates to MusicNetworkSection (Discord/Bandsintown/
  Navidrome now-playing unchanged)
- i18n: musicNetwork.* across all 9 locales, incl. a per-field help hint for
  Rocksky's CLI session-key flow (rocksky login)
- scrobble now uses the documented array form (artist[0]/track[0]/…); the bare
  single form is only tolerated by Last.fm, Rocksky requires the indexed form
- auth-error detection keys off the response message (not the ambiguous numeric
  code) so a Rocksky server-500 no longer flips the account to a reconnect state
- PresetManifest.PresetField gains an optional helpKey

Rocksky's server rejects some non-ASCII track metadata with a 500 — a Rocksky
backend bug; the client call is correct (verified).

* fix(music-network): clearer Integrations layout + scrobble batch fix

Address UI feedback on the Music Network section:
- per-account scrobble toggle moves inside its account block (was a loose
  row between cards — unclear which account it belonged to)
- master toggle and the primary-service picker are now boxed blocks at the top,
  not bare rows
- primary-service copy reworked: 'Primary service' + a line spelling out that
  liked tracks/similar artists/stats come from it while scrobbling still goes
  to all enabled services
- distinct zones separated by dividers (master/primary · connected · add)

Also folds in the verified scrobble fixes: documented array form
(artist[0]/track[0]/…) so Rocksky accepts scrobbles, and auth-error detection
by message rather than the ambiguous numeric code (a Rocksky server-500 no
longer flips the account to a reconnect state). Rocksky session-key field gains
a CLI help hint (rocksky login), all 9 locales.

* feat(music-network): indicator + remove legacy lastfm path

Phase 7b/7c — finish the cutover and delete the old Last.fm path.

- LastfmIndicator -> MusicNetworkIndicator (shows the enrichment primary's
  status, click -> Integrations)
- delete src/api/lastfm.ts; remove Rust lastfm_request (remote.rs + lib.rs)
- remove legacy authStore lastfm* fields, actions and types; delete
  authLastfmActions.ts; rehydrate migration reads the legacy blob via a cast
- migrate the remaining NowPlaying call-sites (NowPlaying.tsx + the now-playing
  fetchers/prewarm/star-love hooks) off lastfmSessionKey/lastfmUsername onto the
  enrichment primary (gate + cache key)
- type imports LastfmTrackInfo/LastfmArtistStats -> music-network TrackStats/
  ArtistStats; drop 8 stale api/lastfm test mocks and the obsolete Last.fm auth
  tests; update settingsTabs + src/CLAUDE.md

No lastfm imports remain outside src/music-network/; lastfm_request removed
(acceptance §12). tsc clean, 1947 frontend tests + remote rust tests green.

* test(music-network): cover scrobble shape + error classification, drop dead i18n keys

Remove the 14 unused legacy scrobble/connection i18n keys across all 9
locales (settings.lfm*/scrobble*, connection.lastfm*); the live love,
profile-link and now-playing keys stay.

Add regression tests for the parity-critical transport logic: the indexed
batch/array scrobble body, the auth-vs-network error classification
(numeric codes collide across providers), and the manifest-overrides-probe
capability merge.

* feat(music-network): provider-agnostic UI + Maloja Audioscrobbler & Koito presets

- de-hardcode the single provider name across every enrichment surface
  (love labels, now-playing badge, stats title); derive it from the
  enrichment primary and interpolate via {{provider}} i18n params
- surface a toast when a paste-auth connect probe fails — a static
  'supported' capability flag no longer masks a runtime probe error
- add the Maloja Audioscrobbler (GNU FM) preset (the third Maloja wire
  mode) and a Koito preset (ListenBrainz-compatible), both data-only
- generalise PRIVACY.md and the scrobbling help entry to the framework
- rename residual lfm* identifiers to network*; strip legacy flat
  lastfm* fields from the persisted blob; neutral transport error prefix
- tests: error classification, scrobble body, capability probe, registry

* fix(music-network): validate paste-auth keys on connect + UI polish

- AudioscrobblerWire.probe now validates an api_key_only session with a
  signed call and reports scrobble:'error' only on a genuine auth failure
  (a scrobble-only service that rejects user.getInfo is not a bad key), so
  an invalid Maloja Audioscrobbler / Rocksky key surfaces a connect toast
  instead of failing silently; WireContext carries the preset authStrategy
- drop the unreachable Statistics empty-state branch and its dead
  lfmNotConnected i18n key; use the useEnrichmentPrimaryLabel hook there
- drive the love-button glyph from the enrichment primary's manifest icon;
  neutral Music Network section icon; remove a dead LastfmIcon import
- tests: paste-auth vs token-poll probe behaviour

* chore(music-network): rename showLastfmSimilar → showNetworkSimilar, refresh stale comments

Post-parity polish: the similar-artists toggle now sources from the generic
enrichment runtime, so rename the lingering lastfm-flavoured identifier; drop
stale 'Mirrors today's LastfmX' doc comments referencing the removed legacy
types, and generalise the scrobble-point comment.

* docs(changelog): Music Network entry (PR #1066)

Co-Authored-By: cucadmuh <49571317+cucadmuh@users.noreply.github.com>

* fix(music-network): bound request timeout on the provider transports

audioscrobbler_request / listenbrainz_request / maloja_request built a
reqwest client with no timeout, so a hung provider left scrobble / probe /
loved-sync promises unresolved. Add a shared provider_http_client() with a
15s timeout, matching the sibling fetch_* commands. Addresses review C3.

* refactor(music-network): dedupe wire transport + no-enrichment helpers

The three provider clients repeated the same invoke -> classify-error ->
MusicNetworkError boilerplate, and the three probe() bodies repeated the
"mark every enrichment capability no" loop. Extract
wires/shared/invokeTransport() (each wire keeps its own arg shape + auth
rule) and markNoEnrichment() in core/capabilities.ts. Addresses review C4.

* refactor(music-network): drop write-only malojaWireMode dead state

malojaWireMode was written on connect but never read — the wire is resolved
by wireId and the Maloja base URL by the preset's selfHostedApiSuffix.
Remove the field, the MalojaWireMode type, the malojaWireModeFor helper,
the AccountPatch entry, the PresetField union member, and the export.
Addresses review C1.

* refactor(music-network): one useEnrichmentPrimary hook, drop lastfm fallback

The enrichment-primary lookup (accounts.find by enrichmentPrimaryId) was
duplicated across two hooks and inlined in the indicator and both
context-menu builders, two of them with a hardcoded 'lastfm' icon fallback.
Add one music-network/ui/useEnrichmentPrimary() returning
{account,label,icon}|null; useEnrichmentPrimaryLabel/Icon delegate to it and
the indicator + context menus consume it directly. Icon fallback is the
neutral 'custom' glyph, never a provider (provider-agnostic, §7.3).
Addresses review C2.

---------

Co-authored-by: cucadmuh <49571317+cucadmuh@users.noreply.github.com>

src/locales/nl/statistics.ts

@@ -22,7 +22,7 @@ export const statistics = {
   decadeAlbums_one: '{{count}} album',
   decadeAlbums_other: '{{count}} albums',
   decadeUnknown: 'Onbekend',
-  lfmTitle: 'Last.fm-statistieken',
+  lfmTitle: '{{provider}}-statistieken',
   lfmTopArtists: 'Topartiesten',
   lfmTopAlbums: 'Topalbums',
   lfmTopTracks: 'Topnummers',
@@ -33,7 +33,6 @@ export const statistics = {
   lfmPeriod3month: '3 maanden',
   lfmPeriod6month: '6 maanden',
   lfmPeriod12month: '12 maanden',
-  lfmNotConnected: 'Verbind Last.fm in Instellingen om je statistieken te zien.',
   lfmRecentTracks: 'Recente scrobbles',
   lfmNowPlaying: 'Nu bezig',
   lfmJustNow: 'zojuist',