Add custom AI provider support and improve qBittorrent auth

Introduces support for custom OpenAI-compatible AI providers with configurable base URLs, including UI, backend validation, and connection testing. Enhances qBittorrent integration to support HTTP Basic Auth for reverse proxies, adds detailed debug logging, and updates documentation for both features. Also improves login page description logic and AI prompt generation for recommendations.

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

@@ -18,6 +18,11 @@ export async function GET() {
     // Check if local login is disabled via environment variable
     const localLoginDisabled = process.env.DISABLE_LOCAL_LOGIN === 'true';
 
+    // Check if automation (Phase 3) is configured by checking for Prowlarr/indexer config
+    const indexerType = await configService.get('indexer.type');
+    const prowlarrUrl = await configService.get('indexer.prowlarr_url');
+    const automationEnabled = !!(indexerType || prowlarrUrl);
+
     if (backendMode === 'audiobookshelf') {
       // Audiobookshelf mode - check which auth methods are enabled
       const oidcEnabled = (await configService.get('oidc.enabled')) === 'true';
@@ -41,6 +46,7 @@ export async function GET() {
         hasLocalUsers,
         oidcProviderName: oidcEnabled ? oidcProviderName : null,
         localLoginDisabled,
+        automationEnabled,
       });
     } else {
       // Plex mode - check if local admin exists (setup admin)
@@ -58,6 +64,7 @@ export async function GET() {
         hasLocalUsers,
         oidcProviderName: null,
         localLoginDisabled,
+        automationEnabled,
       });
     }
   } catch (error) {
@@ -71,6 +78,7 @@ export async function GET() {
       hasLocalUsers: false,
       oidcProviderName: null,
       localLoginDisabled,
+      automationEnabled: false,
     });
   }
 }