feat: portal redesign, pricing catalog, partner-staff invites

- portal: new admin/ and partner/ surfaces with full component library
  (AppLauncher, Avatar, Badge, Card, Modal, Tabs, etc.), composables,
  layouts, partner-routing middleware, and supporting server APIs
- pricing: Price schema/module with operator CRUD, pricing.vue catalog UI,
  Subscription extended with cycle/currency/perSeatAmount/seats snapshots
  for stable MRR aggregation
- partner staff: User.partnerId, invite-partner-user DTO and flow,
  /partners/:slug/users endpoints, InvitePartnerUserModal, shared
  dezky-partner-staff Authentik group
- /me: partner-aware endpoint returning user + partner context so portal
  can route between end-user and partner-admin surfaces
- tenant: seats field for portfolio displays and future MRR calculations
- operator: pricing page, signed-out page, useMe/useToast composables,
  ToastStack

services/platform-api/src/app.module.ts

@@ -6,7 +6,9 @@ import { AuthModule } from './auth/auth.module.js'
 import { FlagsModule } from './flags/flags.module.js'
 import { HealthModule } from './health/health.module.js'
 import { IngestModule } from './ingest/ingest.module.js'
+import { MeModule } from './me/me.module.js'
 import { PartnersModule } from './partners/partners.module.js'
+import { PricesModule } from './prices/prices.module.js'
 import { SeedModule } from './seed/seed.module.js'
 import { SubscriptionsModule } from './subscriptions/subscriptions.module.js'
 import { TenantsModule } from './tenants/tenants.module.js'
@@ -24,7 +26,9 @@ import { UsersModule } from './users/users.module.js'
     TenantsModule,
     PartnersModule,
     UsersModule,
+    MeModule,
     SubscriptionsModule,
+    PricesModule,
     FlagsModule,
     IngestModule,
     SeedModule,