feat(server): capability framework, AudioMuse sonic routing & PsyLab Connections (#1033)

* feat(server): probe AudioMuse via OpenSubsonic and add PsyLab Connections tab

Navidrome ≥0.62: detect sonicSimilarity extension for reliable plugin signal;
older servers keep the legacy getSimilarSongs probe. PsyLab gets a Connections
tab with session, endpoint, and active-server capability details.

* feat(psylab): polish Connections tab, admin role probe, and tab bar layout

Status badges and Navidrome admin/user validation in Connections; prevent
PsyLab tab row from vertically collapsing under the Logs flex layout.

* docs: add CHANGELOG and credits for PR #1032

* feat(settings): auto-enable AudioMuse on Navidrome 0.62+ with status indicator

Replace the per-server manual toggle with a probe-driven badge when
sonicSimilarity is available; pre-0.62 Navidrome keeps the legacy toggle.

* feat(server): capability framework with AudioMuse sonic routing

Add a declarative server-capability catalog (src/serverCapabilities/) that
picks a feature strategy per server generation, runs only the needed probes,
and routes API calls. AudioMuse Instant Mix now prefers the OpenSubsonic
sonicSimilarity endpoint (getSonicSimilarTracks) on Navidrome 0.62+ and
falls back to legacy getSimilarSongs.

- catalog/context/resolve: eligibility, detection, activation, call routing
- storeView: read facade over the existing per-server probe maps
- getSonicSimilarTracks API client + fetchSimilarTracksRouted router
- route Instant Mix and Lucky Mix through the resolver
- ServersTab + PsyLab Connections read the resolver (auto status vs toggle)
- tests: resolve, storeView, router

* docs: update CHANGELOG and credits for PR #1033

Renamed branch supersedes PR #1032: point changelog/credits at #1033 and
document the server-capability framework, auto-managed AudioMuse indicator,
and sonic Instant Mix routing.

* refactor(server): address PR #1033 review — idempotent probe, drop dead code

- Make scheduleInstantMixProbeForServer idempotent: skip when a definitive
  result is cached; re-probe only on force (add/edit/test server), a prior
  error, or a server version/type change (invalidated in setSubsonicServerIdentity).
  Removes the steady-state 120 s re-probe, the present→probing→present flicker,
  and the momentary legacy-fallback routing window.
- Remove now-dead identity helpers (showAudiomuseNavidromeServerSetting,
  isAudiomusePluginAutoManaged, isNavidromeSonicSimilarityEligible,
  resolveAudiomusePluginProbeUiStatus + type) and the superseded
  probeAudiomusePluginWithCredentials; the catalog is the single source of truth.
- Drop the never-emitted 'unsupported' AudiomusePluginProbeResult variant.
- Fill audiomuseStatus* keys in all 8 non-en locales.
- Tests: probe idempotency + version-change invalidation; retarget
  OpenSubsonic test to fetchOpenSubsonicExtensionsWithCredentials.

src/locales/nb/settings.ts

@@ -105,6 +105,10 @@ export const settings = {
   userMgmtMagicStringModalDesc: 'Skriv inn Subsonic-passordet for «{{username}}». Det tas med i den kopierte magic string-en.',
   userMgmtMagicStringModalConfirm: 'Kopier streng',
   audiomuseTitle: 'AudioMuse-AI (Navidrome)',
+  audiomuseStatusActive: 'Aktiv',
+  audiomuseStatusChecking: 'Sjekker…',
+  audiomuseStatusNotDetected: 'Ikke oppdaget',
+  audiomuseStatusProbeFailed: 'Sjekk mislyktes',
   audiomuseDesc:
     'Slå på hvis denne serveren bruker <pluginLink>AudioMuse-AI Navidrome-plugin</pluginLink>. Aktiverer Instant Mix fra spor og henter lignende artister fra serveren i stedet for Last.fm på artistsider.',
   audiomuseIssueHint: