Plex Integration + Music Source Integration Improvements (#37)

* plex integration

* The big one - Full Music Source page rework + Playlist importing + Full Plex Integration + Discovery Options + More Like This/Surprise Me/Instant Mix + More...

* Music source track page - Play all / shuffle fixes

* lint

* format

* fix type checks

* format

backend/core/dependencies/service_providers.py

@@ -35,6 +35,7 @@ from .repo_providers import (
     get_listenbrainz_repository,
     get_jellyfin_repository,
     get_navidrome_repository,
+    get_plex_repository,
     get_coverart_repository,
     get_youtube_repo,
     get_audiodb_image_service,
@@ -138,7 +139,6 @@ def make_processor(lidarr_repo, memory_cache, disk_cache, cover_repo, request_hi
         if payload and isinstance(payload, dict):
             is_monitored = payload.get("monitored", False)
 
-            # Prefer the explicit monitored flag before falling back to the top-level result.
             if not is_monitored:
                 is_monitored = bool(result.get("monitored"))
 
@@ -568,7 +568,8 @@ def get_jellyfin_playback_service() -> "JellyfinPlaybackService":
     from services.jellyfin_playback_service import JellyfinPlaybackService
 
     jellyfin_repo = get_jellyfin_repository()
-    return JellyfinPlaybackService(jellyfin_repo)
+    cache = get_cache()
+    return JellyfinPlaybackService(jellyfin_repo, cache)
 
 
 @singleton
@@ -606,4 +607,25 @@ def get_navidrome_playback_service() -> "NavidromePlaybackService":
     from services.navidrome_playback_service import NavidromePlaybackService
 
     navidrome_repo = get_navidrome_repository()
-    return NavidromePlaybackService(navidrome_repo)
+    cache = get_cache()
+    return NavidromePlaybackService(navidrome_repo, cache)
+
+
+@singleton
+def get_plex_library_service() -> "PlexLibraryService":
+    from services.plex_library_service import PlexLibraryService
+
+    plex_repo = get_plex_repository()
+    preferences_service = get_preferences_service()
+    library_db = get_library_db()
+    mbid_store = get_mbid_store()
+    return PlexLibraryService(plex_repo, preferences_service, library_db, mbid_store)
+
+
+@singleton
+def get_plex_playback_service() -> "PlexPlaybackService":
+    from services.plex_playback_service import PlexPlaybackService
+
+    plex_repo = get_plex_repository()
+    cache = get_cache()
+    return PlexPlaybackService(plex_repo, cache)