feat: client disable/deletion with soft-delete (#69)

* feat: add client disable/deletion with soft-delete (#67)

Add soft-delete support for clients: disable is the default action
(hiding from client list and booking flow), with permanent deletion
requiring explicit type-to-confirm. Disabled clients remain in
reporting and can be re-enabled by staff.

- Add client_status enum (active/disabled) and disabled_at column
- API defaults GET /api/clients to active-only, ?includeDisabled=true shows all
- PATCH /api/clients/:id accepts status field for disable/enable
- DELETE requires ?confirm=true query param
- Booking flow skips disabled clients
- Frontend: show disabled toggle, disable/enable buttons, delete confirmation modal

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: remove unused updateClientSchema (lint error)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Groom Book CTO <cto@groombook.app>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/db/src/schema.ts

@@ -42,6 +42,11 @@ export const paymentMethodEnum = pgEnum("payment_method", [
   "other",
 ]);
 
+export const clientStatusEnum = pgEnum("client_status", [
+  "active",
+  "disabled",
+]);
+
 // ─── Tables ───────────────────────────────────────────────────────────────────
 
 export const clients = pgTable("clients", {
@@ -53,6 +58,8 @@ export const clients = pgTable("clients", {
   notes: text("notes"),
   // Set to true if the client has opted out of email reminders/notifications
   emailOptOut: boolean("email_opt_out").notNull().default(false),
+  status: clientStatusEnum("status").notNull().default("active"),
+  disabledAt: timestamp("disabled_at"),
   createdAt: timestamp("created_at").notNull().defaultNow(),
   updatedAt: timestamp("updated_at").notNull().defaultNow(),
 });