Add radio embed widget, SSE real-time, song history, moderation panel, and Auto DJ

- Embed widget: standalone iframe player with dark/light/transparent themes, copy-paste embed code admin page
- Real-time SSE: streaming now-playing/listeners/dj events, replaces polling in radio-player and embed
- Song history: auto-records song changes to radio_song_plays table, Filament resource to view
- DJ moderation: unified panel for shouts approval, song request queue, DJ applications
- Auto DJ: playlist management with round-robin playback when no DJ is live
- Refactored radio-player Alpine component to use EventSource API with auto-reconnect

app/Filament/Pages/Radio/RadioSettings.php

@@ -83,6 +83,12 @@ final class RadioSettings extends Page implements HasForms
             'radio_widget_enabled' => $this->getSettingBool('radio_widget_enabled'),
             'radio_widget_show_globally' => $this->getSettingBool('radio_widget_show_globally'),
             'radio_widget_position' => $this->getSetting('radio_widget_position', 'bottom-right'),
+            'radio_embed_enabled' => $this->getSettingBool('radio_embed_enabled'),
+            'radio_embed_allowed_domains' => $this->getSetting('radio_embed_allowed_domains', ''),
+            'radio_embed_theme' => $this->getSetting('radio_embed_theme', 'dark'),
+            'radio_embed_height' => (int) $this->getSetting('radio_embed_height', '400'),
+            'radio_embed_width' => $this->getSetting('radio_embed_width', '100%'),
+            'radio_embed_auto_play' => $this->getSettingBool('radio_embed_auto_play'),
             'radio_shouts_enabled' => $this->getSettingBool('radio_shouts_enabled'),
             'radio_shouts_max_length' => (int) $this->getSetting('radio_shouts_max_length', '280'),
             'radio_shouts_cooldown' => (int) $this->getSetting('radio_shouts_cooldown', '30'),
@@ -626,6 +632,32 @@ final class RadioSettings extends Page implements HasForms
                                 'top-left' => 'Links Boven',
                             ])
                             ->default('bottom-right'),
+                        Toggle::make('radio_embed_enabled')
+                            ->label('Externe Embed Inschakelen')
+                            ->columnSpanFull()
+                            ->helperText('Sta toe dat de radio als iframe op externe sites wordt geplaatst.'),
+                        TextInput::make('radio_embed_allowed_domains')
+                            ->label('Toegestane Domeinen')
+                            ->placeholder('voorbeeld.nl, anderedomein.com')
+                            ->helperText('Komma-gescheiden lijst. Leeg = alle domeinen toegestaan.'),
+                        Select::make('radio_embed_theme')
+                            ->label('Embed Thema')
+                            ->options([
+                                'dark' => 'Donker',
+                                'light' => 'Licht',
+                                'transparent' => 'Transparant',
+                            ])
+                            ->default('dark'),
+                        TextInput::make('radio_embed_height')
+                            ->label('Embed Hoogte (px)')
+                            ->numeric()
+                            ->default(400),
+                        TextInput::make('radio_embed_width')
+                            ->label('Embed Breedte')
+                            ->placeholder('100% of 400px')
+                            ->default('100%'),
+                        Toggle::make('radio_embed_auto_play')
+                            ->label('Auto-Play in Embed'),
                     ]),
                 Section::make('Offline Pagina')
                     ->description('Instellingen voor wanneer de radio offline is')
@@ -890,6 +922,9 @@ final class RadioSettings extends Page implements HasForms
         $this->saveSettings([
             'radio_widget_enabled', 'radio_widget_show_globally',
             'radio_widget_position',
+            'radio_embed_enabled', 'radio_embed_allowed_domains',
+            'radio_embed_theme', 'radio_embed_height',
+            'radio_embed_width', 'radio_embed_auto_play',
         ]);
     }
 
@@ -1475,7 +1510,8 @@ final class RadioSettings extends Page implements HasForms
                 'radio_stats_show_weekly', 'radio_stats_show_monthly',
                 'radio_stats_show_top_djs', 'radio_stats_show_top_songs',
                 'radio_show_offline_message', 'radio_widget_enabled',
-                'radio_widget_show_globally', 'radio_applications_enabled',
+                'radio_widget_show_globally', 'radio_embed_enabled',
+                'radio_embed_auto_play', 'radio_applications_enabled',
                 'radio_applications_require_approval', 'radio_discord_enabled',
                 'radio_discord_dj_live', 'radio_discord_song_changes',
                 'radio_listener_alerts_enabled', 'radio_azurecast_use_proxy',
@@ -1488,6 +1524,7 @@ final class RadioSettings extends Page implements HasForms
                 'radio_dj_avatar_size', 'radio_dj_detection_interval',
                 'radio_shouts_max_length', 'radio_shouts_cooldown',
                 'radio_chat_width', 'radio_chat_height', 'radio_chat_messages_count',
+                'radio_embed_height',
                 'radio_request_max_per_user', 'radio_request_cooldown',
                 'radio_min_listeners_threshold', 'radio_listener_alert_threshold_high',
                 'radio_listener_alert_threshold_low', 'radio_applications_max_per_day',