Optional qBittorrent creds; require SABnzbd key

Allow qBittorrent to be configured without credentials (supports IP whitelist) and require an API key for SABnzbd. Skip connection testing when disabling a client. Updates include: validation changes in admin and setup API routes, test-download-client flows, DownloadClientModal UI validation and save/test logic, and DownloadClientManager to pass empty strings for optional credentials. Tests updated to reflect SABnzbd API key requirement.

src/app/api/admin/settings/download-clients/[id]/route.ts

@@ -77,12 +77,16 @@ export async function PUT(
           }
         }
 
-        // Test connection if credentials/URL changed
+        // Test connection if credentials/URL changed (skip if disabling client)
+        const isDisabling = enabled === false;
         if (
-          url !== undefined ||
-          username !== undefined ||
-          (password && password !== '********') ||
-          disableSSLVerify !== undefined
+          !isDisabling &&
+          (
+            url !== undefined ||
+            username !== undefined ||
+            (password && password !== '********') ||
+            disableSSLVerify !== undefined
+          )
         ) {
           const testResult = await manager.testConnection(updatedClient);
           if (!testResult.success) {

src/app/api/admin/settings/download-clients/route.ts

@@ -72,17 +72,18 @@ export async function POST(request: NextRequest) {
         }
 
         // Validate required fields
-        if (!name || !url || !password) {
+        // Name and URL always required; password/API key only required for SABnzbd
+        // qBittorrent supports IP whitelist auth (no credentials needed)
+        if (!name || !url) {
           return NextResponse.json(
-            { error: 'Name, URL, and password/API key are required' },
+            { error: 'Name and URL are required' },
             { status: 400 }
           );
         }
 
-        // qBittorrent requires username
-        if (type === 'qbittorrent' && !username) {
+        if (type === 'sabnzbd' && !password) {
           return NextResponse.json(
-            { error: 'Username is required for qBittorrent' },
+            { error: 'API key is required for SABnzbd' },
             { status: 400 }
           );
         }
@@ -111,14 +112,15 @@ export async function POST(request: NextRequest) {
         }
 
         // Create new client config
+        // qBittorrent credentials are optional (supports IP whitelist auth)
         const newClient: DownloadClientConfig = {
           id: randomUUID(),
           type,
           name,
           enabled: true,
           url,
-          username: username || undefined,
-          password,
+          username: username || '',
+          password: password || '',
           disableSSLVerify: disableSSLVerify || false,
           remotePathMappingEnabled: remotePathMappingEnabled || false,
           remotePath: remotePath || undefined,

src/app/api/admin/settings/download-clients/test/route.ts

@@ -66,29 +66,32 @@ export async function POST(request: NextRequest) {
         }
 
         // Validate required fields
-        if (!url || !effectivePassword) {
+        // URL is always required; password/API key only required for SABnzbd
+        // qBittorrent supports IP whitelist auth (no credentials needed)
+        if (!url) {
           return NextResponse.json(
-            { error: 'URL and password/API key are required' },
+            { error: 'URL is required' },
             { status: 400 }
           );
         }
 
-        if (type === 'qbittorrent' && !effectiveUsername) {
+        if (type === 'sabnzbd' && !effectivePassword) {
           return NextResponse.json(
-            { error: 'Username is required for qBittorrent' },
+            { error: 'API key is required for SABnzbd' },
             { status: 400 }
           );
         }
 
         // Create temporary client config for testing
+        // qBittorrent credentials are optional (supports IP whitelist auth)
         const testConfig: DownloadClientConfig = {
           id: 'test',
           type,
           name: 'Test Client',
           enabled: true,
           url,
-          username: effectiveUsername || undefined,
-          password: effectivePassword,
+          username: effectiveUsername || '',
+          password: effectivePassword || '',
           disableSSLVerify: disableSSLVerify || false,
           remotePathMappingEnabled: remotePathMappingEnabled || false,
           remotePath: remotePath || undefined,

src/app/api/setup/complete/route.ts

@@ -107,16 +107,18 @@ export async function POST(request: NextRequest) {
     }
 
     // Validate each client has required fields
+    // qBittorrent credentials are optional (supports IP whitelist auth)
+    // SABnzbd always requires API key
     for (const client of clients) {
-      if (!client.url || !client.password) {
+      if (!client.url) {
         return NextResponse.json(
-          { success: false, error: 'Download client URL and password/API key are required' },
+          { success: false, error: 'Download client URL is required' },
           { status: 400 }
         );
       }
-      if (client.type === 'qbittorrent' && !client.username) {
+      if (client.type === 'sabnzbd' && !client.password) {
         return NextResponse.json(
-          { success: false, error: 'qBittorrent username is required' },
+          { success: false, error: 'SABnzbd API key is required' },
           { status: 400 }
         );
       }

src/app/api/setup/test-download-client/route.ts

@@ -29,19 +29,13 @@ export async function POST(request: NextRequest) {
     }
 
     // Validate required fields per client type
+    // qBittorrent credentials are optional (supports IP whitelist auth)
     if (type === 'qbittorrent') {
-      if (!username || !password) {
-        return NextResponse.json(
-          { success: false, error: 'Username and password are required for qBittorrent' },
-          { status: 400 }
-        );
-      }
-
-      // Test qBittorrent connection
+      // Test qBittorrent connection (empty credentials work with IP whitelist)
       const version = await QBittorrentService.testConnectionWithCredentials(
         url,
-        username,
-        password,
+        username || '',
+        password || '',
         disableSSLVerify || false
       );