backend/src/modules/staff/staff.controller.ts

@@ -80,6 +80,19 @@ export class StaffController {
     return this.staffService.updateMember(req.user.id, organizationId, membershipId, dto);
   }
 
+  @Patch('members/:membershipId/enable')
+  @UseGuards(JwtAuthGuard)
+  @ApiOperation({
+    summary: 'Re-enable a disabled staff member (uses one plan seat; no new invitation)',
+  })
+  enableMember(
+    @Req() req: { user: { id: string; organizationId?: string } },
+    @Param('membershipId') membershipId: string,
+  ) {
+    const organizationId = this.staffService.getOrganizationIdFromUser(req.user);
+    return this.staffService.enableMember(req.user.id, organizationId, membershipId);
+  }
+
   @Patch('members/:membershipId/disable')
   @UseGuards(JwtAuthGuard)
   @ApiOperation({

backend/src/modules/staff/staff.service.ts

@@ -7,6 +7,7 @@ import {
 } from '@nestjs/common';
 import * as bcrypt from 'bcrypt';
 import { createHash, randomBytes } from 'crypto';
+import { Prisma } from '@prisma/client';
 import { PrismaService } from '../../../prisma/prisma.service';
 import { AcceptStaffInviteDto } from './dto/accept-staff-invite.dto';
 import { isUnlimitedSeats, normalizeTabPermissions } from '../../common/permissions';
@@ -399,6 +400,50 @@ export class StaffService {
     return { success: true, message: 'Member updated' };
   }
 
+  async enableMember(actorUserId: string, organizationId: string, membershipId: string) {
+    const actor = await this.getActorMembership(actorUserId, organizationId);
+    if (!actor || !this.canEditStaff(actor)) {
+      throw new ForbiddenException('You cannot manage staff');
+    }
+
+    const target = await this.prisma.membership.findFirst({
+      where: { id: membershipId, organizationId },
+      include: {
+        invitations: { orderBy: { createdAt: 'desc' }, take: 1 },
+      },
+    });
+
+    if (!target) {
+      throw new NotFoundException('Member not found');
+    }
+    if (target.isOwner) {
+      throw new ForbiddenException('Cannot enable the organization owner');
+    }
+    if (target.isActive) {
+      throw new BadRequestException('This member is already active');
+    }
+
+    const invitation = target.invitations[0];
+    if (invitation && !invitation.acceptedAt) {
+      throw new BadRequestException(
+        'This member has not completed their invitation yet. Share the invite link instead.',
+      );
+    }
+
+    await this.prisma.$transaction(async (tx) => {
+      await this.assertOrganizationHasAvailableSeat(organizationId, tx);
+      await tx.membership.update({
+        where: { id: membershipId },
+        data: { isActive: true },
+      });
+    });
+
+    return {
+      success: true,
+      message: 'Member enabled. They can sign in to this organization again.',
+    };
+  }
+
   async disableMember(actorUserId: string, organizationId: string, membershipId: string) {
     const actor = await this.getActorMembership(actorUserId, organizationId);
     if (!actor || !this.canEditStaff(actor)) {
@@ -459,6 +504,37 @@ export class StaffService {
     return { success: true, message: 'Member removed' };
   }
 
+  private async assertOrganizationHasAvailableSeat(
+    organizationId: string,
+    db: Prisma.TransactionClient | PrismaService = this.prisma,
+  ) {
+    const org = await db.organization.findUnique({
+      where: { id: organizationId },
+      include: { plan: true },
+    });
+    if (!org) {
+      throw new NotFoundException('Organization not found');
+    }
+    if (!org.plan) {
+      throw new BadRequestException(
+        'This organization has no active subscription. Please choose a plan before adding staff.',
+      );
+    }
+
+    const maxUsers = org.plan.maxUsers;
+    const seatsUsed = await db.membership.count({
+      where: {
+        organizationId,
+        OR: [{ isOwner: true }, { isActive: true }],
+      },
+    });
+    if (!isUnlimitedSeats(maxUsers) && seatsUsed >= maxUsers) {
+      throw new BadRequestException(
+        `Your plan allows ${maxUsers} team members. Free a seat by disabling another member or upgrade your plan.`,
+      );
+    }
+  }
+
   private async getActorMembership(userId: string, organizationId: string) {
     return this.prisma.membership.findFirst({
       where: { userId, organizationId },

frontend/src/app/(dashboard)/staff/page.tsx

@@ -16,7 +16,7 @@ import {
   formatAccessSummary,
   type FeaturePermState,
 } from '../../../components/staff/staff-permission-form';
-import { Pencil, Trash2, Copy, Check, X, UserX } from 'lucide-react';
+import { Pencil, Trash2, Copy, Check, X, UserX, UserCheck } from 'lucide-react';
 import { DialogCloseButton } from '@/components/ui/shared/DialogCloseButton';
 import { useAuth } from '@/lib/hooks/useAuth';
 import { staffApi, type StaffMemberDto } from '@/lib/api/staff';
@@ -67,6 +67,10 @@ function canDisableStaff(member: StaffMemberDto): boolean {
   return !member.isOwner && member.isActive;
 }
 
+function canEnableStaff(member: StaffMemberDto): boolean {
+  return !member.isOwner && member.invitationStatus === 'DISABLED';
+}
+
 function PermissionGrid({
   state,
   onChange,
@@ -161,6 +165,8 @@ export default function StaffPage() {
   const [editLoading, setEditLoading] = useState(false);
   const [disableTarget, setDisableTarget] = useState<StaffMemberDto | null>(null);
   const [disablingMembershipId, setDisablingMembershipId] = useState<string | null>(null);
+  const [enableTarget, setEnableTarget] = useState<StaffMemberDto | null>(null);
+  const [enablingMembershipId, setEnablingMembershipId] = useState<string | null>(null);
 
   const canEdit = useMemo(() => canEditStaff(currentOrganization), [currentOrganization]);
   const hasActivePlan = Boolean(currentOrganization?.plan);
@@ -170,6 +176,12 @@ export default function StaffPage() {
     return seats.used >= seats.limit;
   }, [seats]);
 
+  const hasAvailableSeat = useMemo(() => {
+    if (!seats || seats.unlimited) return true;
+    if (seats.limit == null) return true;
+    return seats.used < seats.limit;
+  }, [seats]);
+
   const load = useCallback(async () => {
     toast.setError('');
     setLoading(true);
@@ -352,6 +364,23 @@ export default function StaffPage() {
     }
   }
 
+  async function confirmEnableMember() {
+    if (!enableTarget || !canEnableStaff(enableTarget) || !hasAvailableSeat) return;
+
+    setEnablingMembershipId(enableTarget.id);
+    toast.setError('');
+    try {
+      await staffApi.enableMember(enableTarget.id);
+      toast.showSuccess(`${enableTarget.name} was enabled and can sign in again.`);
+      setEnableTarget(null);
+      await load();
+    } catch (e) {
+      toast.showError(formatApiErrorMessage(e, 'Failed to enable member.'));
+    } finally {
+      setEnablingMembershipId(null);
+    }
+  }
+
   if (!currentOrganization || !canViewStaff(currentOrganization)) {
     return (
       <p className="text-sm text-text-secondary">Redirecting…</p>
@@ -547,6 +576,25 @@ export default function StaffPage() {
                             )}
                           </button>
                         )}
+                        {canEnableStaff(m) && (
+                          <button
+                            type="button"
+                            className={`p-2 rounded-md ${
+                              canEdit
+                                ? 'text-text-secondary hover:bg-background-card/80 hover:text-primary'
+                                : 'text-text-muted opacity-50 cursor-not-allowed'
+                            }`}
+                            aria-label="Enable member"
+                            disabled={!canEdit || enablingMembershipId === m.id}
+                            title="Enable member (uses a seat)"
+                            onClick={() => {
+                              if (!canEdit) return;
+                              setEnableTarget(m);
+                            }}
+                          >
+                            <UserCheck className="w-4 h-4" />
+                          </button>
+                        )}
                         {canDisableStaff(m) && (
                           <button
                             type="button"
@@ -660,6 +708,66 @@ export default function StaffPage() {
         </div>
       )}
 
+      {enableTarget && (
+        <div className="fixed inset-0 z-50 flex items-center justify-center p-4 bg-black/55">
+          <div
+            className="surface-card w-full max-w-md p-5 space-y-4 shadow-xl"
+            role="dialog"
+            aria-modal="true"
+            aria-labelledby="enable-staff-title"
+          >
+            <div className="flex items-start justify-between gap-2">
+              <h2 id="enable-staff-title" className="text-lg font-semibold text-text-primary pr-2">
+                Enable team member
+              </h2>
+              <DialogCloseButton
+                onClick={() => {
+                  if (enablingMembershipId) return;
+                  setEnableTarget(null);
+                }}
+              />
+            </div>
+            <p className="text-sm text-text-secondary">
+              Enable <span className="font-medium text-text-primary">{enableTarget.name}</span> (
+              {enableTarget.email})?
+            </p>
+            <ul className="text-sm text-text-secondary space-y-2 list-disc pl-5">
+              <li>They can sign in to this organization again with their existing account.</li>
+              <li>No new invitation is sent and no data was removed while they were disabled.</li>
+              <li>
+                Enabling uses <span className="text-text-primary font-medium">one seat</span> on your
+                plan.
+              </li>
+            </ul>
+            {!hasAvailableSeat && (
+              <p className="text-sm text-amber-600 dark:text-amber-400">
+                No seats are available. Disable another member or upgrade your plan before enabling
+                this person.
+              </p>
+            )}
+            <div className="flex justify-end gap-2 pt-1">
+              <Button
+                type="button"
+                variant="outline"
+                disabled={Boolean(enablingMembershipId)}
+                onClick={() => setEnableTarget(null)}
+              >
+                Cancel
+              </Button>
+              <Button
+                type="button"
+                variant="primary"
+                isLoading={enablingMembershipId === enableTarget.id}
+                disabled={Boolean(enablingMembershipId) || !hasAvailableSeat}
+                onClick={() => void confirmEnableMember()}
+              >
+                Enable member
+              </Button>
+            </div>
+          </div>
+        </div>
+      )}
+
       {disableTarget && (
         <div className="fixed inset-0 z-50 flex items-center justify-center p-4 bg-black/55">
           <div

frontend/src/components/ui/organizations/OrganizationSelectorContent.tsx

@@ -8,10 +8,18 @@ import { Input } from '@/components/ui/shared/Input';
 import { Button } from '@/components/ui/shared/Button';
 
 export function OrganizationSelectorContent() {
-  const { organizations, selectOrganization, createOrganization, isLoading, error, clearError } = useAuth();
+  const {
+    organizations,
+    currentOrganization,
+    selectOrganization,
+    createOrganization,
+    isLoading,
+    error,
+    clearError,
+  } = useAuth();
   const canCreateOrganization = useMemo(
-    () => canUserCreateOrganization(organizations),
-    [organizations],
+    () => canCreateOrganizationFromCurrentOrg(currentOrganization),
+    [currentOrganization],
   );
   const [isCreateOpen, setIsCreateOpen] = useState(false);
   const [organizationName, setOrganizationName] = useState('');

frontend/src/lib/api/staff.ts

@@ -107,6 +107,13 @@ export const staffApi = {
     return response.data;
   },
 
+  enableMember: async (
+    membershipId: string,
+  ): Promise<{ success: boolean; message: string }> => {
+    const response = await apiClient.patch(`/staff/members/${membershipId}/enable`);
+    return response.data;
+  },
+
   removeMember: async (
     membershipId: string,
   ): Promise<{ success: boolean; message: string }> => {