feat: 4-role model — owner, operator, viewer + vendor-seed

Redesign the role model from 3 roles (platform-admin, admin, member)
to 4 clear personas:

- owner (org role): full tenant control — billing, team, apps, deploy
- operator (org role): app lifecycle + observability, no billing/team
- viewer (org role): read-only observability
- saas-vendor (global role, hosted only): cross-tenant platform admin

Bootstrap changes:
- Rename org roles: admin→owner, member→operator, add viewer
- Remove platform-admin global role (moved to vendor-seed)
- admin user gets owner role, camel user gets viewer role
- Custom JWT maps: owner→server:admin, operator→server:operator,
  viewer→server:viewer, saas-vendor→server:admin

New docker/vendor-seed.sh for hosted SaaS environments only.
Remove sidebar user/logout link (TopBar handles logout).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docs/superpowers/specs/2026-04-07-role-license-redesign.md

@@ -0,0 +1,32 @@
+# Role Model + License Model Redesign
+
+**Date:** 2026-04-07
+**Status:** Approved
+
+## Problem
+
+The current role model (platform-admin, org admin, org member) doesn't map cleanly to real-world personas. The member role can deploy but can't manage apps — it's neither a proper operator nor a proper viewer. There's no read-only role. The license model assumes SaaS (per-tenant) with no on-premise consideration.
+
+## Decision
+
+### 4-Role Model
+
+| Role | Logto Type | Scopes | Persona |
+|------|-----------|--------|---------|
+| SaaS Vendor | Global `saas-vendor` | `platform:admin` + all tenant scopes | SaaS operator (hosted only) |
+| Platform Owner | Org `owner` | All 10 tenant scopes + `server:admin` | Customer admin |
+| Operator | Org `operator` | `apps:manage`, `apps:deploy`, `observe:read`, `observe:debug`, `server:operator` | DevOps |
+| Viewer | Org `viewer` | `observe:read`, `server:viewer` | Read-only stakeholder |
+
+### Deployment Modes
+
+- **SaaS:** Vendor-seed script (separate from bootstrap) creates `saas-vendor` role. Standard bootstrap creates tenants with owner/operator/viewer.
+- **On-premise:** Single implicit tenant. First user is `owner`. No vendor role exists.
+
+### License Model
+
+No schema changes. `LicenseEntity.tenantId` works for both modes. On-prem has one tenant = one license. SaaS has per-tenant licenses managed by vendor.
+
+### Vendor-Seed Script
+
+`docker/vendor-seed.sh` — run once on hosted environment, not part of standard bootstrap. Creates saas-vendor global role + vendor user.