feat(portal): real Security & audit page (+ bundled Storage / per-tenant-roles WIP)

Security & audit (admin)
- Audit log: real, tenant-scoped — widened GET /tenants/:slug/audit with
  q/action/outcome/actorEmail/since/before; UI gains search, outcome + time
  filters, action chips, cursor pagination, and client-side CSV export.
- Security policy: new tenant.securityPolicy (mfaMode, session idle/absolute,
  allowedCountries, ipAllowlist) + PATCH /tenants/:slug/security-policy
  (membership-gated, audited). Editable, labelled by enforcement status.
- MFA: live enrollment overview via GET /tenants/:slug/mfa-status
  (Authentik countAuthenticators per member).
- SSO apps (Dezky as IdP): real Authentik OIDC provider + application CRUD,
  scoped to the tenant group. New AuthentikClient methods (provider/app/binding
  + flow/key/scope discovery), TenantSsoApp schema, TenantSsoService (rollback
  on partial failure; client secret never stored), GET/POST/DELETE
  /tenants/:slug/sso-apps. Validated end-to-end against live Authentik.
- Deferred: shared-flow MFA/geo/session enforcement (global auth-flow blast
  radius) — to be done as its own reviewed change.

Bundled in-progress work that shares the same files (kept together so the tree
stays green):
- Storage page: StorageService + GET /tenants/:slug/storage (OCIS-backed),
  storage.get proxy, storage.vue.
- Per-tenant roles: User.tenantRoles + MeProfile.tenantRoles plumbing.

apps/portal/server/api/tenants/[slug]/audit.get.ts

@@ -1,9 +1,12 @@
-// Tenant-scoped audit slice for the customer-admin dashboard. Proxies
-// GET /tenants/:slug/audit with the signed-in user's access token. The
-// platform-api enforces tenant membership and filters strictly by tenantSlug.
+// Tenant-scoped audit slice for the customer-admin Security & audit page.
+// Proxies GET /tenants/:slug/audit with the signed-in user's access token and
+// forwards the filter/pagination params. platform-api enforces tenant
+// membership and pins the query to this tenant's slug.
 
 import { getUserSession } from 'nuxt-oidc-auth/runtime/server/utils/session.js'
 
+const PASS_THROUGH = ['limit', 'q', 'action', 'outcome', 'actorEmail', 'since', 'before'] as const
+
 export default defineEventHandler(async (event) => {
   const session = await getUserSession(event).catch(() => null)
   const accessToken = (session as { accessToken?: string } | null)?.accessToken
@@ -11,10 +14,15 @@ export default defineEventHandler(async (event) => {
     throw createError({ statusCode: 401, statusMessage: 'Not signed in' })
   }
   const slug = getRouterParam(event, 'slug')
-  const { limit } = getQuery(event)
+  const incoming = getQuery(event)
+  const query: Record<string, string> = {}
+  for (const k of PASS_THROUGH) {
+    const v = incoming[k]
+    if (v != null && v !== '') query[k] = String(v)
+  }
   const base = process.env.PLATFORM_API_INTERNAL_URL ?? 'http://platform-api:3001'
   return $fetch(`${base}/tenants/${slug}/audit`, {
     headers: { Authorization: `Bearer ${accessToken}` },
-    query: limit ? { limit } : undefined,
+    query,
   })
 })