Add ASIN support to file organization and metadata

This update enhances audiobook file organization by including the ASIN in folder names and embedding it as a custom metadata tag in audio files (M4B/M4A/MP3). Documentation is updated to reflect the new folder naming convention and metadata tagging. Additionally, local login and registration can now be disabled via an environment variable, and the interactive torrent search modal allows custom search titles for all modes.

src/app/api/auth/providers/route.ts

@@ -12,6 +12,9 @@ export async function GET() {
     const configService = new ConfigurationService();
     const backendMode = await configService.get('system.backend_mode');
 
+    // Check if local login is disabled via environment variable
+    const localLoginDisabled = process.env.DISABLE_LOCAL_LOGIN === 'true';
+
     if (backendMode === 'audiobookshelf') {
       // Audiobookshelf mode - check which auth methods are enabled
       const oidcEnabled = (await configService.get('oidc.enabled')) === 'true';
@@ -25,14 +28,16 @@ export async function GET() {
 
       const providers: string[] = [];
       if (oidcEnabled) providers.push('oidc');
-      if (hasLocalUsers) providers.push('local');
+      // Only add 'local' provider if not disabled and users exist
+      if (hasLocalUsers && !localLoginDisabled) providers.push('local');
 
       return NextResponse.json({
         backendMode: 'audiobookshelf',
         providers,
-        registrationEnabled,
+        registrationEnabled: !localLoginDisabled && registrationEnabled,
         hasLocalUsers,
         oidcProviderName: oidcEnabled ? oidcProviderName : null,
+        localLoginDisabled,
       });
     } else {
       // Plex mode - check if local admin exists (setup admin)
@@ -49,17 +54,20 @@ export async function GET() {
         registrationEnabled: false,
         hasLocalUsers,
         oidcProviderName: null,
+        localLoginDisabled,
       });
     }
   } catch (error) {
     console.error('[Auth] Failed to fetch auth providers:', error);
     // Default to Plex mode if config can't be read
+    const localLoginDisabled = process.env.DISABLE_LOCAL_LOGIN === 'true';
     return NextResponse.json({
       backendMode: 'plex',
       providers: ['plex'],
       registrationEnabled: false,
       hasLocalUsers: false,
       oidcProviderName: null,
+      localLoginDisabled,
     });
   }
 }