feat(recycle-bin): soft delete + restore for master data

Accidental admin deletes of users/roles/subscriptions/plans/tariffs were
hard and unrecoverable. Now they soft-delete into a recycle bin.

Schema (migration 0012): nullable deleted_at + deleted_by on users, roles,
subscriptions, subscription_plans, tariffs. Additive ADD COLUMN; verified
against a copy of the live DB.

Backend: each resource's DELETE route STAMPS instead of removing; every
catalog list filters deleted_at IS NULL. New recycle-bin module + routes
(GET /api/recycle-bin, POST .../restore, DELETE .../:id purge) gated on a
new recyclebin:read/update/delete permission. A 6-hourly + startup sweep
auto-purges items older than RECYCLE_BIN_RETENTION_DAYS (default 30; 0 =
forever).

Invariants: soft-deleted users can't log in (login rejects deleted_at;
no-lockout counts live admins only); a soft-deleted subscription doesn't
open the barrier; plans are versioned so a delete stamps all versions of
the plan_id (bin shows one item); username/role-name UNIQUE spans deleted
rows so reuse returns a clear 409 pointing at the bin; restore doesn't
auto-cascade a dangling role (guard resolves missing role to empty perms).
The signed append-only ledger is OUT of scope (no delete path).

Web: a Recycle bin tab under Setup (RecycleBin.tsx) with Restore/Purge +
purge confirm; api client + i18n (sq + en parity).

Tests: recycle-bin.test.ts (9 unit) + recycle-bin-routes.test.ts (4
integration: delete -> can't-login -> restore -> login, purge, gating,
409 reuse). server 103/103; build+lint+test 19/19.

Wiki: new concepts/soft-delete.md; local-jwt-auth + index + log updated.

Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V

apps/server/src/routes/subscriptions.ts

@@ -1,9 +1,10 @@
 import { randomBytes, randomUUID } from "node:crypto";
 import type { FastifyInstance } from "fastify";
-import { eq, devices, subscriptionCredentials, subscriptionPlans, subscriptionPlates, subscriptions, type Db } from "@parking/db";
+import { and, eq, isNull, devices, subscriptionCredentials, subscriptionPlans, subscriptionPlates, subscriptions, type Db } from "@parking/db";
 import { NoPrinterAvailableError } from "@parking/devices";
 import type { SubscriptionPlan, SubscriptionQuote, Tender } from "@parking/shared";
 import { requirePermission, roleHasPermissions } from "../auth.js";
+import { softDelete } from "../recycle-bin.js";
 import { invalidateHolder } from "../event-enrich.js";
 import { printSubscriptionCard } from "../booth-print.js";
 import type { CredentialCapture } from "../credential-capture.js";
@@ -226,9 +227,10 @@ export async function subscriptionRoutes(
     return { plan, validFrom, validTo, quantity, quote };
   }
 
-  // List all subscriptions (with their credentials + plates).
+  // List all LIVE subscriptions (with their credentials + plates). Soft-deleted ones
+  // live in the recycle bin, not here.
   app.get("/api/subscriptions", { preHandler: readGuard }, async () => {
-    const rows = db.select().from(subscriptions).all();
+    const rows = db.select().from(subscriptions).where(isNull(subscriptions.deletedAt)).all();
     return { subscriptions: rows.map((r) => loadAggregate(r.id)) };
   });
 
@@ -532,16 +534,17 @@ export async function subscriptionRoutes(
     },
   );
 
-  // Hard delete a subscription + its child rows. (Past ledger events that reference it
-  // are untouched — the audit trail is append-only and independent of this row.)
+  // Delete a subscription — SOFT (recycle bin). The row + its credential/plate children
+  // are KEPT (stamped deleted) so a restore brings the subscriber back intact; it leaves
+  // the catalog and stops opening the barrier (the entry flow filters deleted). Past
+  // ledger events that reference it are untouched (append-only). Restore/purge from the
+  // recycle bin. (Distinct from /revoke, which BARS but keeps the subscriber visible.)
   app.delete<{ Params: { id: string } }>(
     "/api/subscriptions/:id",
     { preHandler: deleteGuard },
     async (req, reply) => {
-      const r = db.delete(subscriptions).where(eq(subscriptions.id, req.params.id)).run();
-      if (r.changes === 0) return reply.code(404).send({ error: "subscription not found" });
-      db.delete(subscriptionCredentials).where(eq(subscriptionCredentials.subscriptionId, req.params.id)).run();
-      db.delete(subscriptionPlates).where(eq(subscriptionPlates.subscriptionId, req.params.id)).run();
+      const ok = softDelete(db, "subscription", req.params.id, req.user.sub);
+      if (!ok) return reply.code(404).send({ error: "subscription not found" });
       invalidateHolder(req.params.id);
       return reply.code(204).send();
     },