diff --git a/app/Http/Controllers/Download/DownloadSongsController.php b/app/Http/Controllers/Download/DownloadSongsController.php
index 84801ebe..9ca3b47a 100644
--- a/app/Http/Controllers/Download/DownloadSongsController.php
+++ b/app/Http/Controllers/Download/DownloadSongsController.php
@@ -8,12 +8,15 @@ use App\Models\Song;
 use App\Repositories\SongRepository;
 use App\Services\DownloadService;
 use Illuminate\Http\Response;
+use Illuminate\Support\Collection;
 
 class DownloadSongsController extends Controller
 {
     public function __invoke(DownloadSongsRequest $request, DownloadService $service, SongRepository $repository)
     {
         // Don't use SongRepository::findMany() because it'd have been already catered to the current user.
+
+        /** @var Array<Song>|Collection<array-key, Song> $songs */
         $songs = Song::query()->findMany($request->songs);
         $songs->each(fn ($song) => $this->authorize('download', $song));
 
diff --git a/app/Models/Podcast.php b/app/Models/Podcast.php
index a3372ee8..2fd19d8f 100644
--- a/app/Models/Podcast.php
+++ b/app/Models/Podcast.php
@@ -18,7 +18,7 @@ use PhanAn\Poddle\Values\CategoryCollection;
 use PhanAn\Poddle\Values\ChannelMetadata;
 
 /**
- * @property-read string $id
+ * @property string $id
  * @property string $url
  * @property string $title
  * @property string $description
diff --git a/app/Models/Song.php b/app/Models/Song.php
index 15ded62f..55c97a89 100644
--- a/app/Models/Song.php
+++ b/app/Models/Song.php
@@ -17,6 +17,7 @@ use App\Values\SongStorageMetadata\S3LambdaMetadata;
 use App\Values\SongStorageMetadata\SftpMetadata;
 use App\Values\SongStorageMetadata\SongStorageMetadata;
 use Carbon\Carbon;
+use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Casts\Attribute;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
@@ -31,7 +32,7 @@ use Throwable;
 /**
  * @property string $path
  * @property string $title
- * @property Album $album
+ * @property ?Album $album
  * @property User $uploader
  * @property ?Artist $artist
  * @property ?Artist $album_artist
@@ -105,13 +106,12 @@ class Song extends Model
     public static function query(?PlayableType $type = null, ?User $user = null): SongBuilder
     {
         return parent::query()
-            ->when($type, static function (SongBuilder $query) use ($type): void {
-                match ($type) {
-                    PlayableType::SONG => $query->whereNull('songs.podcast_id'),
-                    PlayableType::PODCAST_EPISODE => $query->whereNotNull('songs.podcast_id'),
-                };
+            ->when($type, static fn (Builder $query) => match ($type) { // @phpstan-ignore-line phpcs:ignore
+                PlayableType::SONG => $query->whereNull('songs.podcast_id'),
+                PlayableType::PODCAST_EPISODE => $query->whereNotNull('songs.podcast_id'),
+                default => $query,
             })
-            ->when($user, static fn (SongBuilder $query) => $query->forUser($user));
+            ->when($user, static fn (SongBuilder $query) => $query->forUser($user)); // @phpstan-ignore-line
     }
 
     public function owner(): BelongsTo
diff --git a/app/Policies/EpisodePolicy.php b/app/Policies/EpisodePolicy.php
deleted file mode 100644
index 3c62eb76..00000000
--- a/app/Policies/EpisodePolicy.php
+++ /dev/null
@@ -1,14 +0,0 @@
-<?php
-
-namespace App\Policies;
-
-use App\Models\Podcast\Song;
-use App\Models\User;
-
-class EpisodePolicy
-{
-    public function access(User $user, Song $episode): bool
-    {
-        return $user->subscribedToPodcast($episode->podcast);
-    }
-}
diff --git a/app/Services/LicenseService.php b/app/Services/LicenseService.php
index 95e71ae7..a3b7d668 100644
--- a/app/Services/LicenseService.php
+++ b/app/Services/LicenseService.php
@@ -21,8 +21,9 @@ use Throwable;
 
 class LicenseService implements LicenseServiceInterface
 {
-    public function __construct(private readonly LemonSqueezyConnector $connector, private readonly string $hashSalt)
+    public function __construct(private readonly LemonSqueezyConnector $connector, private ?string $hashSalt = null)
     {
+        $this->hashSalt ??= config('app.key');
     }
 
     public function activate(string $key): License
diff --git a/app/Services/PodcastService.php b/app/Services/PodcastService.php
index ca5c0bdc..3a528463 100644
--- a/app/Services/PodcastService.php
+++ b/app/Services/PodcastService.php
@@ -13,6 +13,7 @@ use App\Repositories\SongRepository;
 use Carbon\Carbon;
 use GuzzleHttp\Client;
 use GuzzleHttp\RedirectMiddleware;
+use GuzzleHttp\RequestOptions;
 use Illuminate\Support\Arr;
 use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Http;
@@ -56,6 +57,7 @@ class PodcastService
             $channel = $parser->getChannel();
 
             return DB::transaction(function () use ($url, $podcast, $parser, $channel, $user) {
+                /** @var Podcast $podcast */
                 $podcast = Podcast::query()->create([
                     'url' => $url,
                     'title' => $channel->title,
@@ -102,8 +104,8 @@ class PodcastService
             'last_synced_at' => now(),
         ]);
 
-        $pubDate = $parser->xmlReader->value('rss.channel.pubDate')?->first()
-            ?? $parser->xmlReader->value('rss.channel.lastBuildDate')?->first();
+        $pubDate = $parser->xmlReader->value('rss.channel.pubDate')->first()
+            ?? $parser->xmlReader->value('rss.channel.lastBuildDate')->first();
 
         if ($pubDate && Carbon::createFromFormat(Carbon::RFC1123, $pubDate)->isBefore($podcast->last_synced_at)) {
             // The pubDate/lastBuildDate value indicates that there's no new content since last check.
@@ -150,7 +152,7 @@ class PodcastService
 
         // Since insert() doesn't trigger model events, Scout operations will not be called.
         // We have to manually update the search index.
-        Episode::query()->whereIn('id', $ids)->searchable();
+        Episode::query()->whereIn('id', $ids)->searchable(); // @phpstan-ignore-line
     }
 
     private function subscribeUserToPodcast(User $user, Podcast $podcast): void
@@ -206,16 +208,16 @@ class PodcastService
             $url = $url->path;
         }
 
-        $client ??= $this->client ?? new Client();
+        $client ??= new Client();
 
         try {
             $response = $client->request($method, $url, [
-                'headers' => [
+                RequestOptions::HEADERS => [
                     'User-Agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 14_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4.1 Safari/605.1.15', // @phpcs-ignore-line
                     'Origin' => '*',
                 ],
-                'http_errors' => false,
-                'allow_redirects' => ['track_redirects' => true],
+                RequestOptions::HTTP_ERRORS => false,
+                RequestOptions::ALLOW_REDIRECTS => ['track_redirects' => true],
             ]);
 
             $redirects = Arr::wrap($response->getHeader(RedirectMiddleware::HISTORY_HEADER));
diff --git a/app/Services/SearchService.php b/app/Services/SearchService.php
index b9aa4429..268b59fa 100644
--- a/app/Services/SearchService.php
+++ b/app/Services/SearchService.php
@@ -52,7 +52,7 @@ class SearchService
     {
         try {
             return $repository->getMany(
-                ids: $repository->model::search($keywords)->get()->take($count)->pluck('id')->all(),
+                ids: $repository->model::search($keywords)->get()->take($count)->pluck('id')->all(), // @phpstan-ignore-line
                 preserveOrder: true,
             );
         } catch (Throwable $e) {
diff --git a/app/Services/SongService.php b/app/Services/SongService.php
index 5c23791b..dae85886 100644
--- a/app/Services/SongService.php
+++ b/app/Services/SongService.php
@@ -41,7 +41,7 @@ class SongService
             return collect($ids)->reduce(function (Collection $updated, string $id) use ($data): Collection {
                 optional(
                     Song::query()->with('album.artist')->find($id),
-                    fn (Song $song) => $updated->push($this->updateSong($song, clone $data))
+                    fn (Song $song) => $updated->push($this->updateSong($song, clone $data)) // @phpstan-ignore-line
                 );
 
                 return $updated;
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 75df91b1..b9525845 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -29,6 +29,7 @@ parameters:
         - '#Method App\\Models\\.*::query\(\) should return App\\Builders\\.*Builder but returns Illuminate\\Database\\Eloquent\\Builder<Illuminate\\Database\\Eloquent\\Model>#'
         - '#Parameter \#1 \$callback of method Illuminate\\Support\\Collection<int,Illuminate\\Database\\Eloquent\\Model>::each\(\) expects callable\(Illuminate\\Database\\Eloquent\\Model, int\)#'
         - '#Access to an undefined property Illuminate\\Database\\Eloquent\\Model::#'
+        - '#Unknown parameter \$(type|user) in call to static method App\\Models\\Song::query\(\)#'
 
 
     excludePaths:
diff --git a/routes/channels.php b/routes/channels.php
index 11c31d91..480801e3 100644
--- a/routes/channels.php
+++ b/routes/channels.php
@@ -1,7 +1,5 @@
 <?php
 
-use Illuminate\Support\Facades\Broadcast;
-
 /*
 |--------------------------------------------------------------------------
 | Broadcast Channels
@@ -12,4 +10,3 @@ use Illuminate\Support\Facades\Broadcast;
 | used to check if an authenticated user can listen to the channel.
 |
 */
-Broadcast::channel('App.User.{id}', static fn ($user, $id) => (int) $user->id === (int) $id);
diff --git a/tests/Feature/ExcerptSearchTest.php b/tests/Feature/ExcerptSearchTest.php
index 138c6f8a..7d34fa66 100644
--- a/tests/Feature/ExcerptSearchTest.php
+++ b/tests/Feature/ExcerptSearchTest.php
@@ -28,7 +28,9 @@ class ExcerptSearchTest extends TestCase
         Album::factory(4)->create();
 
         $user = create_user();
-        $user->subscribeToPodcast(Podcast::factory()->create(['title' => 'Foo Podcast']));
+        /** @var Podcast $podcast */
+        $podcast = Podcast::factory()->create(['title' => 'Foo Podcast']);
+        $user->subscribeToPodcast($podcast);
 
         $this->getAs('api/search?q=foo', $user)
             ->assertJsonStructure([
diff --git a/tests/Integration/Services/PlaylistServiceTest.php b/tests/Integration/Services/PlaylistServiceTest.php
index 3f589a53..f2c1b94f 100644
--- a/tests/Integration/Services/PlaylistServiceTest.php
+++ b/tests/Integration/Services/PlaylistServiceTest.php
@@ -212,6 +212,7 @@ class PlaylistServiceTest extends TestCase
         $playlist = Playlist::factory()->create();
         $playlist->addPlayables(Song::factory(3)->create());
 
+        /** @var Podcast $podcast */
         $podcast = Podcast::factory()->create();
         $episodes = Song::factory(2)->asEpisode()->for($podcast)->create();
 
diff --git a/tests/Integration/Services/PodcastServiceTest.php b/tests/Integration/Services/PodcastServiceTest.php
index 4bfc1ac5..c1317e8e 100644
--- a/tests/Integration/Services/PodcastServiceTest.php
+++ b/tests/Integration/Services/PodcastServiceTest.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Integration\Services;
+namespace Tests\Integration\Services;
 
 use App\Exceptions\UserAlreadySubscribedToPodcast;
 use App\Models\Podcast;
@@ -8,11 +8,11 @@ use App\Models\PodcastUserPivot;
 use App\Models\Song;
 use App\Services\PodcastService;
 use GuzzleHttp\Client;
+use GuzzleHttp\ClientInterface;
 use GuzzleHttp\Handler\MockHandler;
 use GuzzleHttp\HandlerStack;
 use GuzzleHttp\Psr7\Response;
 use Illuminate\Support\Facades\Http;
-use Psr\Http\Client\ClientInterface;
 use Tests\TestCase;
 
 use function Tests\create_user;
@@ -59,6 +59,7 @@ class PodcastServiceTest extends TestCase
 
     public function testSubscribeUserToPodcast(): void
     {
+        /** @var Podcast $podcast */
         $podcast = Podcast::factory()->create([
             'url' => 'https://example.com/feed.xml',
             'title' => 'My Cool Podcast',
@@ -79,6 +80,7 @@ class PodcastServiceTest extends TestCase
     {
         self::expectException(UserAlreadySubscribedToPodcast::class);
 
+        /** @var Podcast $podcast */
         $podcast = Podcast::factory()->create([
             'url' => 'https://example.com/feed.xml',
         ]);
@@ -97,6 +99,7 @@ class PodcastServiceTest extends TestCase
             'https://example.com/feed.xml' => Http::response(headers: ['Last-Modified' => now()->toRfc1123String()]),
         ]);
 
+        /** @var Podcast $podcast */
         $podcast = Podcast::factory()->create([
             'url' => 'https://example.com/feed.xml',
             'title' => 'Shall be changed very sad',
@@ -116,6 +119,7 @@ class PodcastServiceTest extends TestCase
 
     public function testUnsubscribeUserFromPodcast(): void
     {
+        /** @var Podcast $podcast */
         $podcast = Podcast::factory()->create();
         $user = create_user();
         $user->subscribeToPodcast($podcast);
@@ -127,6 +131,7 @@ class PodcastServiceTest extends TestCase
 
     public function testPodcastNotObsoleteIfSyncedRecently(): void
     {
+        /** @var Podcast $podcast */
         $podcast = Podcast::factory()->create([
             'last_synced_at' => now()->subHours(6),
         ]);
@@ -140,6 +145,7 @@ class PodcastServiceTest extends TestCase
             'https://example.com/feed.xml' => Http::response(headers: ['Last-Modified' => now()->toRfc1123String()]),
         ]);
 
+        /** @var Podcast $podcast */
         $podcast = Podcast::factory()->create([
             'url' => 'https://example.com/feed.xml',
             'last_synced_at' => now()->subDays(1),
@@ -150,6 +156,7 @@ class PodcastServiceTest extends TestCase
 
     public function testUpdateEpisodeProgress(): void
     {
+        /** @var Song $episode */
         $episode = Song::factory()->asEpisode()->create();
         $user = create_user();
         $user->subscribeToPodcast($episode->podcast);
diff --git a/tests/Integration/Values/EpisodePlayableTest.php b/tests/Integration/Values/EpisodePlayableTest.php
index 886dd644..af1b6298 100644
--- a/tests/Integration/Values/EpisodePlayableTest.php
+++ b/tests/Integration/Values/EpisodePlayableTest.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Integration\Values;
+namespace Tests\Integration\Values;
 
 use App\Models\Song;
 use App\Values\Podcast\EpisodePlayable;
@@ -16,6 +16,7 @@ class EpisodePlayableTest extends TestCase
             'https://example.com/episode.mp3' => Http::response('foo'),
         ]);
 
+        /** @var Song $episode */
         $episode = Song::factory()->asEpisode()->create([
             'path' => 'https://example.com/episode.mp3',
         ]);