feat(auth): add admin login token management

src/app/admin/users/page.tsx

@@ -29,6 +29,7 @@ interface User {
   autoApproveRequests: boolean | null;
   interactiveSearchAccess: boolean | null;
   downloadAccess: boolean | null;
+  hasLoginToken: boolean;
   _count: {
     requests: number;
   };
@@ -220,6 +221,7 @@ function AdminUsersPageContent() {
   const [globalDownloadAccess, setGlobalDownloadAccess] = useState<boolean>(true);
   const [globalSettingsOpen, setGlobalSettingsOpen] = useState(false);
   const [permissionsUserId, setPermissionsUserId] = useState<string | null>(null);
+  const [generatedToken, setGeneratedToken] = useState<string | null>(null);
   const toast = useToast();
 
   const isLoading = !data && !error;
@@ -363,6 +365,24 @@ function AdminUsersPageContent() {
     }
   };
 
+  const handleToggleToken = async (user: User, newValue: boolean) => {
+    try {
+      if (newValue) {
+        const result = await fetchJSON(`/api/admin/users/${user.id}/login-token`, { method: 'POST' });
+        setGeneratedToken(result.fullToken);
+        toast.success(`Login token generated for ${user.plexUsername}`);
+      } else {
+        await fetchJSON(`/api/admin/users/${user.id}/login-token`, { method: 'DELETE' });
+        setGeneratedToken(null);
+        toast.success(`Login token revoked for ${user.plexUsername}`);
+      }
+      mutate();
+    } catch (err) {
+      const errorMsg = err instanceof Error ? err.message : 'Failed to update login token';
+      toast.error(errorMsg);
+    }
+  };
+
   const showEditDialog = (user: User) => {
     setEditRole(user.role);
     setEditDialog({ isOpen: true, user });
@@ -968,11 +988,15 @@ function AdminUsersPageContent() {
         {/* User Permissions Modal */}
         <UserPermissionsModal
           isOpen={permissionsUser !== null}
-          onClose={() => setPermissionsUserId(null)}
+          onClose={() => {
+            setPermissionsUserId(null);
+            setGeneratedToken(null);
+          }}
           user={permissionsUser}
           globalAutoApprove={globalAutoApprove}
           globalInteractiveSearch={globalInteractiveSearch}
           globalDownloadAccess={globalDownloadAccess}
+          generatedToken={generatedToken}
           onToggleAutoApprove={(user, newValue) => {
             handleUserAutoApproveToggle(user as User, newValue);
           }}
@@ -982,6 +1006,9 @@ function AdminUsersPageContent() {
           onToggleDownloadAccess={(user, newValue) => {
             handleUserDownloadAccessToggle(user as User, newValue);
           }}
+          onToggleToken={(user, newValue) => {
+            handleToggleToken(user as unknown as User, newValue);
+          }}
         />
       </div>
     </div>

src/app/api/admin/users/[id]/login-token/route.ts

@@ -0,0 +1,101 @@
+/**
+ * Component: Admin User Login Token
+ * Documentation: documentation/backend/services/auth.md
+ */
+
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAuth, requireAdmin, AuthenticatedRequest } from '@/lib/middleware/auth';
+import { prisma } from '@/lib/db';
+import { RMABLogger } from '@/lib/utils/logger';
+import { generateApiToken } from '@/lib/utils/api-token';
+import crypto from 'crypto';
+
+const logger = RMABLogger.create('API.Admin.Users.LoginToken');
+
+export async function POST(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  return requireAuth(request, async (req: AuthenticatedRequest) => {
+    return requireAdmin(req, async () => {
+      try {
+        const { id } = await params;
+
+        const targetUser = await prisma.user.findUnique({
+          where: { id },
+          select: { plexUsername: true, deletedAt: true },
+        });
+
+        if (!targetUser) {
+          return NextResponse.json({ error: 'User not found' }, { status: 404 });
+        }
+
+        if (targetUser.deletedAt) {
+          return NextResponse.json(
+            { error: 'Cannot generate token for deleted user' },
+            { status: 403 }
+          );
+        }
+
+        const { fullToken } = generateApiToken();
+        const tokenHash = crypto.createHash('sha256').update(fullToken).digest('hex');
+
+        await prisma.user.update({
+          where: { id },
+          data: { loginTokenHash: tokenHash },
+        });
+
+        logger.info('Admin generated login token for user', {
+          targetUser: targetUser.plexUsername,
+          createdBy: req.user!.username,
+        });
+
+        return NextResponse.json({ fullToken }, { status: 201 });
+      } catch (error) {
+        logger.error('Failed to generate login token', {
+          error: error instanceof Error ? error.message : String(error),
+        });
+        return NextResponse.json({ error: 'Failed to generate login token' }, { status: 500 });
+      }
+    });
+  });
+}
+
+export async function DELETE(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  return requireAuth(request, async (req: AuthenticatedRequest) => {
+    return requireAdmin(req, async () => {
+      try {
+        const { id } = await params;
+
+        const targetUser = await prisma.user.findUnique({
+          where: { id },
+          select: { plexUsername: true },
+        });
+
+        if (!targetUser) {
+          return NextResponse.json({ error: 'User not found' }, { status: 404 });
+        }
+
+        await prisma.user.update({
+          where: { id },
+          data: { loginTokenHash: null },
+        });
+
+        logger.info('Admin revoked login token for user', {
+          targetUser: targetUser.plexUsername,
+          revokedBy: req.user!.username,
+        });
+
+        return NextResponse.json({ success: true });
+      } catch (error) {
+        logger.error('Failed to revoke login token', {
+          error: error instanceof Error ? error.message : String(error),
+        });
+        return NextResponse.json({ error: 'Failed to revoke login token' }, { status: 500 });
+      }
+    });
+  });
+}

src/app/api/admin/users/route.ts

@@ -33,6 +33,7 @@ export async function GET(request: NextRequest) {
             autoApproveRequests: true,
             interactiveSearchAccess: true,
             downloadAccess: true,
+            loginTokenHash: true,
             _count: {
               select: {
                 requests: true,
@@ -44,7 +45,12 @@ export async function GET(request: NextRequest) {
           },
         });
 
-        return NextResponse.json({ users });
+        return NextResponse.json({
+          users: users.map(({ loginTokenHash, ...u }) => ({
+            ...u,
+            hasLoginToken: loginTokenHash !== null,
+          })),
+        });
       } catch (error) {
         logger.error('Failed to fetch users', { error: error instanceof Error ? error.message : String(error) });
         return NextResponse.json(