Add Storage, Users, Secrets, Webhooks, Scheduled tasks, Audit log screens

Full management surfaces for the platform-admin tenant, mirroring the
existing Tenants pattern (DataTable + row actions + create/edit dialogs +
ConfirmDialog for destructive ops, all data-action tagged for the
command bus, useRegisterAdminContext publishing for the assistant).

- Storage (/storage): backends + credentials. Write-only secret fields,
  Validate/Activate/Deactivate/Set-default/Mark-degraded/Maintenance.
- Users (/users): tabs for Users, Invitations, Roles. Per-user View
  drawer with profile, role add/remove, API keys (one-time reveal on
  create), usage + quota.
- Secrets (/secrets): /api/v1/admin/secrets — create/rotate/rollback,
  versions dialog, enable/disable, generate-value helper.
- Webhooks (/webhooks): CRUD, pause/resume, regenerate-secret with
  one-time reveal, send test event, deliveries dialog.
- Scheduled tasks (/scheduled-tasks): cron CRUD, run-now trigger,
  enable/disable, expandable run history.
- Audit log (/activity): replaces the empty stub. Filter by severity,
  resource type, date range; click for full JSON detail.

All endpoints are hand-rolled HTTP because most aren't covered by the
generated OpenAPI typed paths yet — switch to arcadia.typed.* when the
backend wires them into OpenApiSpex.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/lib/arcadia/api-keys.ts

@@ -0,0 +1,67 @@
+// Arcadia per-user API key helpers (v2 multi-key path).
+//
+// `POST /api/v1/users/:user_id/api_keys` returns the raw key value exactly
+// once — list/show endpoints only return the prefix. Callers must surface
+// the value to the user immediately on create.
+
+import type { ArcadiaClient } from "@crema/arcadia-client"
+
+export interface ApiKey {
+  id: string
+  key_prefix: string
+  description: string | null
+  created_at: string
+  last_used_at: string | null
+  expires_at: string | null
+  revoked_at: string | null
+  is_active: boolean
+}
+
+export interface ApiKeyCreateInput {
+  description?: string
+  expires_at?: string | null
+}
+
+export interface ApiKeyCreated {
+  api_key: string
+  key_id: string
+  key_prefix: string
+  user_id: string
+  description: string | null
+  created_at: string
+  expires_at: string | null
+  warning: string
+}
+
+export async function listUserApiKeys(
+  arcadia: ArcadiaClient,
+  userId: string,
+): Promise<ApiKey[]> {
+  const res = await arcadia.GET<{ data: ApiKey[] }>(
+    `/api/v1/users/${userId}/api_keys`,
+  )
+  return res.data
+}
+
+export async function createUserApiKey(
+  arcadia: ArcadiaClient,
+  userId: string,
+  input: ApiKeyCreateInput,
+): Promise<ApiKeyCreated> {
+  const res = await arcadia.POST<{ data: ApiKeyCreated }>(
+    `/api/v1/users/${userId}/api_keys`,
+    { body: input },
+  )
+  return res.data
+}
+
+export async function revokeUserApiKey(
+  arcadia: ArcadiaClient,
+  userId: string,
+  keyId: string,
+  reason?: string,
+): Promise<void> {
+  await arcadia.DELETE(`/api/v1/users/${userId}/api_keys/${keyId}`, {
+    body: reason ? { reason } : undefined,
+  })
+}