Phase 6

Owner Administration is complete. Summary of this final stretch of work:

Seed data extended with an inactive staff member, a pending invitation, a redeemed-reward fixture, a service with no eligible staff, and a future-appointment fixture for conflict testing — all idempotent, verified against the dev DB.

Testing brought to 179 unit / 86 integration / 27 E2E tests, all passing together on a freshly seeded, disposable Postgres:

Unit tests for every new pure validator (business hours, categories/services, booking rules, loyalty config, staff creation).
Integration tests covering opening-hours conflicts, last-owner protection, staff deactivation/eligibility conflicts, loyalty redemption's atomic race-guard, and owner-vs-barber/business-isolation authorization — all against a real Postgres.
12 new Playwright owner journeys, which surfaced and fixed two genuine issues along the way: a cookie-clearing race condition in the sign-out-mid-test flow (a real, reproducible timing bug, not just a test artifact), and confirmation that seed fixtures upserted by deterministic ID go stale once "today" has moved on — now handled defensively.
Desktop responsiveness: converted the single-column Business Details, Booking Rules, and Loyalty Configuration forms to a genuine two-column layout at the lg: breakpoint (verified via measured element positions, not just screenshots), confirmed mobile stacking is unaffected.

Final verification: clean tsc, eslint, and next build, plus the full three-suite run against one fresh database as the authoritative pass.

prisma/migrations/20260803070350_owner_administration/migration.sql

@@ -0,0 +1,55 @@
+-- AlterEnum
+-- This migration adds more than one value to an enum.
+-- With PostgreSQL versions 11 and earlier, this is not possible
+-- in a single migration. This can be worked around by creating
+-- multiple migrations, each migration adding only one value to
+-- the enum.
+
+
+ALTER TYPE "Permission" ADD VALUE 'MANAGE_ALL_APPOINTMENTS';
+ALTER TYPE "Permission" ADD VALUE 'VIEW_REPORTING';
+
+-- AlterTable
+ALTER TABLE "Appointment" ADD COLUMN     "discountAmount" DECIMAL(10,2);
+
+-- AlterTable
+ALTER TABLE "LoyaltyReward" ADD COLUMN     "redeemedByStaffId" TEXT;
+
+-- CreateTable
+CREATE TABLE "StaffInvitation" (
+    "id" TEXT NOT NULL,
+    "businessId" TEXT NOT NULL,
+    "staffId" TEXT NOT NULL,
+    "email" TEXT NOT NULL,
+    "token" TEXT NOT NULL,
+    "invitedByUserId" TEXT,
+    "expiresAt" TIMESTAMP(3) NOT NULL,
+    "acceptedAt" TIMESTAMP(3),
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "StaffInvitation_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "StaffInvitation_staffId_key" ON "StaffInvitation"("staffId");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "StaffInvitation_token_key" ON "StaffInvitation"("token");
+
+-- CreateIndex
+CREATE INDEX "StaffInvitation_businessId_idx" ON "StaffInvitation"("businessId");
+
+-- AddForeignKey
+ALTER TABLE "StaffInvitation" ADD CONSTRAINT "StaffInvitation_businessId_fkey" FOREIGN KEY ("businessId") REFERENCES "Business"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "StaffInvitation" ADD CONSTRAINT "StaffInvitation_staffId_fkey" FOREIGN KEY ("staffId") REFERENCES "StaffProfile"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "StaffInvitation" ADD CONSTRAINT "StaffInvitation_invitedByUserId_fkey" FOREIGN KEY ("invitedByUserId") REFERENCES "User"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "LoyaltyReward" ADD CONSTRAINT "LoyaltyReward_appliedToAppointmentId_fkey" FOREIGN KEY ("appliedToAppointmentId") REFERENCES "Appointment"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "LoyaltyReward" ADD CONSTRAINT "LoyaltyReward_redeemedByStaffId_fkey" FOREIGN KEY ("redeemedByStaffId") REFERENCES "StaffProfile"("id") ON DELETE SET NULL ON UPDATE CASCADE;