Add extensible notification providers + UI/API

Introduce a provider-based notification system and wire it through the API and admin UI. Added INotificationProvider + notification service implementation and providers (apprise, discord, ntfy, pushover), plus a GET /api/admin/notifications/providers endpoint to expose provider metadata. Refactored code to use provider type strings (removed enum coupling), updated masking/encryption calls, and simplified the test notification endpoint to accept backendId or type+config and call sendToBackend directly.

UI: NotificationsTab now fetches provider metadata and renders provider cards and dynamic config forms (fields driven by provider metadata). Added config field rendering, improved backend cards, and edit/delete actions.

APIs: New providers route, updated admin notification CRUD routes to validate provider types dynamically, updated test route schema. Added download-client categories POST API to fetch categories from clients and wired postImportCategory handling in download-client routes.

Other notable changes: BookDate now fetches Claude models dynamically from Anthropic's Models API; added paginated model fetch helper. Added ALLOW_WEAK_PASSWORD flag exposure to auth providers and password change logic. Doc updates and various tests added/updated. File-organization doc clarifies EPERM fix using stream-based copy.

src/app/setup/steps/AdminAccountStep.tsx

@@ -5,7 +5,7 @@
 
 'use client';
 
-import { useState } from 'react';
+import { useState, useEffect } from 'react';
 import { Button } from '@/components/ui/Button';
 
 interface AdminAccountStepProps {
@@ -25,6 +25,23 @@ export function AdminAccountStep({
 }: AdminAccountStepProps) {
   const [confirmPassword, setConfirmPassword] = useState('');
   const [errors, setErrors] = useState<{ username?: string; password?: string; confirm?: string }>({});
+  const [allowWeakPassword, setAllowWeakPassword] = useState(false);
+
+  // Fetch password policy
+  useEffect(() => {
+    const fetchPolicy = async () => {
+      try {
+        const response = await fetch('/api/auth/providers');
+        if (response.ok) {
+          const data = await response.json();
+          setAllowWeakPassword(data.allowWeakPassword === true);
+        }
+      } catch {
+        // Default to strict validation on error
+      }
+    };
+    fetchPolicy();
+  }, []);
 
   const validate = () => {
     const newErrors: { username?: string; password?: string; confirm?: string } = {};
@@ -35,7 +52,9 @@ export function AdminAccountStep({
     }
 
     // Validate password
-    if (!adminPassword || adminPassword.length < 8) {
+    if (!adminPassword) {
+      newErrors.password = 'Password is required';
+    } else if (!allowWeakPassword && adminPassword.length < 8) {
       newErrors.password = 'Password must be at least 8 characters';
     }
 
@@ -104,7 +123,7 @@ export function AdminAccountStep({
             <p className="mt-1 text-sm text-red-400">{errors.password}</p>
           )}
           <p className="mt-1 text-xs text-gray-500">
-            Choose a strong password (minimum 8 characters)
+            {allowWeakPassword ? 'Choose a password' : 'Choose a strong password (minimum 8 characters)'}
           </p>
         </div>
 

src/app/setup/steps/AudiobookshelfStep.tsx

@@ -14,7 +14,8 @@ interface AudiobookshelfStepProps {
   absApiToken: string;
   absLibraryId: string;
   absTriggerScanAfterImport: boolean;
-  onUpdate: (field: string, value: string | boolean) => void;
+  absLibraries: Library[];
+  onUpdate: (field: string, value: any) => void;
   onNext: () => void;
   onBack: () => void;
 }
@@ -30,6 +31,7 @@ export function AudiobookshelfStep({
   absApiToken,
   absLibraryId,
   absTriggerScanAfterImport,
+  absLibraries,
   onUpdate,
   onNext,
   onBack,
@@ -39,8 +41,12 @@ export function AudiobookshelfStep({
     success: boolean;
     message?: string;
     libraries?: Library[];
-  } | null>(null);
-  const [libraries, setLibraries] = useState<Library[]>([]);
+  } | null>(
+    absLibraries.length > 0
+      ? { success: true, message: 'Connection verified previously.' }
+      : null
+  );
+  const [libraries, setLibraries] = useState<Library[]>(absLibraries);
 
   const testConnection = async () => {
     setTesting(true);
@@ -56,12 +62,14 @@ export function AudiobookshelfStep({
       const data = await response.json();
 
       if (response.ok && data.success) {
+        const libs = data.libraries || [];
         setTestResult({
           success: true,
           message: 'Connection successful!',
-          libraries: data.libraries || [],
+          libraries: libs,
         });
-        setLibraries(data.libraries || []);
+        setLibraries(libs);
+        onUpdate('absLibraries', libs);
       } else {
         setTestResult({
           success: false,

src/app/setup/steps/BookDateStep.tsx

@@ -12,6 +12,7 @@ interface BookDateStepProps {
   bookdateApiKey: string;
   bookdateModel: string;
   bookdateConfigured: boolean;
+  bookdateModels: ModelOption[];
   onUpdate: (field: string, value: any) => void;
   onNext: () => void;
   onSkip: () => void;
@@ -28,6 +29,7 @@ export function BookDateStep({
   bookdateApiKey,
   bookdateModel,
   bookdateConfigured,
+  bookdateModels,
   onUpdate,
   onNext,
   onSkip,
@@ -35,7 +37,7 @@ export function BookDateStep({
 }: BookDateStepProps) {
   const [testing, setTesting] = useState(false);
   const [tested, setTested] = useState(bookdateConfigured);
-  const [models, setModels] = useState<ModelOption[]>([]);
+  const [models, setModels] = useState<ModelOption[]>(bookdateModels);
   const [error, setError] = useState<string | null>(null);
 
   const handleTestConnection = async () => {
@@ -65,19 +67,22 @@ export function BookDateStep({
         throw new Error(data.error || 'Connection test failed');
       }
 
-      setModels(data.models || []);
+      const fetchedModels = data.models || [];
+      setModels(fetchedModels);
       setTested(true);
       onUpdate('bookdateConfigured', true);
+      onUpdate('bookdateModels', fetchedModels);
 
       // Auto-select first model if none selected
-      if (!bookdateModel && data.models?.length > 0) {
-        onUpdate('bookdateModel', data.models[0].id);
+      if (!bookdateModel && fetchedModels.length > 0) {
+        onUpdate('bookdateModel', fetchedModels[0].id);
       }
 
     } catch (err) {
       setError(err instanceof Error ? err.message : 'Connection test failed');
       setTested(false);
       onUpdate('bookdateConfigured', false);
+      onUpdate('bookdateModels', []);
     } finally {
       setTesting(false);
     }
@@ -123,6 +128,7 @@ export function BookDateStep({
             setTested(false);
             setModels([]);
             onUpdate('bookdateConfigured', false);
+            onUpdate('bookdateModels', []);
           }}
           className="w-full px-4 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-800 text-gray-900 dark:text-white focus:ring-2 focus:ring-blue-500"
         >
@@ -144,6 +150,7 @@ export function BookDateStep({
             setTested(false);
             setModels([]);
             onUpdate('bookdateConfigured', false);
+            onUpdate('bookdateModels', []);
           }}
           placeholder={bookdateProvider === 'openai' ? 'sk-...' : 'sk-ant-...'}
           className="w-full px-4 py-2 border border-gray-300 dark:border-gray-600 rounded-lg bg-white dark:bg-gray-800 text-gray-900 dark:text-white focus:ring-2 focus:ring-blue-500"

src/app/setup/steps/DownloadClientStep.tsx

@@ -5,7 +5,7 @@
 
 'use client';
 
-import { useState, useEffect } from 'react';
+import { useState } from 'react';
 import { Button } from '@/components/ui/Button';
 import { DownloadClientManagement } from '@/components/admin/download-clients/DownloadClientManagement';
 import { DownloadClientType } from '@/lib/interfaces/download-client.interface';
@@ -24,6 +24,7 @@ interface DownloadClient {
   localPath?: string;
   category?: string;
   customPath?: string;
+  postImportCategory?: string;
 }
 
 interface DownloadClientStepProps {

src/app/setup/steps/OIDCConfigStep.tsx

@@ -22,6 +22,7 @@ interface OIDCConfigStepProps {
   oidcAdminClaimEnabled: boolean;
   oidcAdminClaimName: string;
   oidcAdminClaimValue: string;
+  oidcTested: boolean;
   onUpdate: (field: string, value: any) => void;
   onNext: () => void;
   onBack: () => void;
@@ -40,6 +41,7 @@ export function OIDCConfigStep({
   oidcAdminClaimEnabled,
   oidcAdminClaimName,
   oidcAdminClaimValue,
+  oidcTested,
   onUpdate,
   onNext,
   onBack,
@@ -48,7 +50,11 @@ export function OIDCConfigStep({
   const [testResult, setTestResult] = useState<{
     success: boolean;
     message: string;
-  } | null>(null);
+  } | null>(
+    oidcTested
+      ? { success: true, message: 'OIDC configuration verified previously.' }
+      : null
+  );
 
   const testConnection = async () => {
     setTesting(true);
@@ -72,17 +78,20 @@ export function OIDCConfigStep({
           success: true,
           message: 'OIDC discovery successful! Provider configuration validated.',
         });
+        onUpdate('oidcTested', true);
       } else {
         setTestResult({
           success: false,
           message: data.error || 'OIDC discovery failed',
         });
+        onUpdate('oidcTested', false);
       }
     } catch (error) {
       setTestResult({
         success: false,
         message: error instanceof Error ? error.message : 'Connection test failed',
       });
+      onUpdate('oidcTested', false);
     } finally {
       setTesting(false);
     }

src/app/setup/steps/PathsStep.tsx

@@ -14,7 +14,8 @@ interface PathsStepProps {
   mediaDir: string;
   metadataTaggingEnabled: boolean;
   chapterMergingEnabled: boolean;
-  onUpdate: (field: string, value: string | boolean) => void;
+  pathsTested: boolean;
+  onUpdate: (field: string, value: any) => void;
   onNext: () => void;
   onBack: () => void;
 }
@@ -24,6 +25,7 @@ export function PathsStep({
   mediaDir,
   metadataTaggingEnabled,
   chapterMergingEnabled,
+  pathsTested,
   onUpdate,
   onNext,
   onBack,
@@ -34,7 +36,11 @@ export function PathsStep({
     message: string;
     downloadDirValid?: boolean;
     mediaDirValid?: boolean;
-  } | null>(null);
+  } | null>(
+    pathsTested
+      ? { success: true, message: 'Paths validated previously.', downloadDirValid: true, mediaDirValid: true }
+      : null
+  );
 
   const testPaths = async () => {
     setTesting(true);
@@ -59,6 +65,7 @@ export function PathsStep({
           downloadDirValid: data.downloadDirValid,
           mediaDirValid: data.mediaDirValid,
         });
+        onUpdate('pathsTested', true);
       } else {
         setTestResult({
           success: false,
@@ -66,12 +73,14 @@ export function PathsStep({
           downloadDirValid: data.downloadDirValid,
           mediaDirValid: data.mediaDirValid,
         });
+        onUpdate('pathsTested', false);
       }
     } catch (error) {
       setTestResult({
         success: false,
         message: error instanceof Error ? error.message : 'Path validation failed',
       });
+      onUpdate('pathsTested', false);
     } finally {
       setTesting(false);
     }

src/app/setup/steps/PlexStep.tsx

@@ -14,7 +14,8 @@ interface PlexStepProps {
   plexToken: string;
   plexLibraryId: string;
   plexTriggerScanAfterImport: boolean;
-  onUpdate: (field: string, value: string | boolean) => void;
+  plexLibraries: PlexLibrary[];
+  onUpdate: (field: string, value: any) => void;
   onNext: () => void;
   onBack: () => void;
 }
@@ -30,6 +31,7 @@ export function PlexStep({
   plexToken,
   plexLibraryId,
   plexTriggerScanAfterImport,
+  plexLibraries,
   onUpdate,
   onNext,
   onBack,
@@ -39,8 +41,12 @@ export function PlexStep({
     success: boolean;
     message: string;
     libraries?: PlexLibrary[];
-  } | null>(null);
-  const [libraries, setLibraries] = useState<PlexLibrary[]>([]);
+  } | null>(
+    plexLibraries.length > 0
+      ? { success: true, message: 'Connection verified previously.' }
+      : null
+  );
+  const [libraries, setLibraries] = useState<PlexLibrary[]>(plexLibraries);
 
   const testConnection = async () => {
     setTesting(true);
@@ -56,12 +62,14 @@ export function PlexStep({
       const data = await response.json();
 
       if (response.ok && data.success) {
+        const libs = data.libraries || [];
         setTestResult({
           success: true,
           message: `Connected to ${data.serverName || 'Plex server'} successfully!`,
-          libraries: data.libraries || [],
+          libraries: libs,
         });
-        setLibraries(data.libraries || []);
+        setLibraries(libs);
+        onUpdate('plexLibraries', libs);
       } else {
         setTestResult({
           success: false,

src/app/setup/steps/ProwlarrStep.tsx

@@ -5,7 +5,7 @@
 
 'use client';
 
-import { useState, useEffect } from 'react';
+import { useState } from 'react';
 import { Button } from '@/components/ui/Button';
 import { Input } from '@/components/ui/Input';
 import { IndexerManagement } from '@/components/admin/indexers/IndexerManagement';
@@ -13,6 +13,7 @@ import { IndexerManagement } from '@/components/admin/indexers/IndexerManagement
 interface ProwlarrStepProps {
   prowlarrUrl: string;
   prowlarrApiKey: string;
+  prowlarrIndexers: SelectedIndexer[];
   onUpdate: (field: string, value: any) => void;
   onNext: () => void;
   onBack: () => void;
@@ -33,17 +34,19 @@ interface SelectedIndexer {
 export function ProwlarrStep({
   prowlarrUrl,
   prowlarrApiKey,
+  prowlarrIndexers,
   onUpdate,
   onNext,
   onBack,
 }: ProwlarrStepProps) {
-  const [configuredIndexers, setConfiguredIndexers] = useState<SelectedIndexer[]>([]);
+  const [configuredIndexers, setConfiguredIndexers] = useState<SelectedIndexer[]>(prowlarrIndexers);
   const [errorMessage, setErrorMessage] = useState<string | null>(null);
 
-  // Sync configured indexers with parent
-  useEffect(() => {
-    onUpdate('prowlarrIndexers', configuredIndexers);
-  }, [configuredIndexers, onUpdate]);
+  // Update both local and parent state when indexers change
+  const handleIndexersChange = (indexers: SelectedIndexer[]) => {
+    setConfiguredIndexers(indexers);
+    onUpdate('prowlarrIndexers', indexers);
+  };
 
   const handleNext = () => {
     setErrorMessage(null);
@@ -136,7 +139,7 @@ export function ProwlarrStep({
             prowlarrApiKey={prowlarrApiKey}
             mode="wizard"
             initialIndexers={configuredIndexers}
-            onIndexersChange={setConfiguredIndexers}
+            onIndexersChange={handleIndexersChange}
           />
         </div>
       </div>