feat: strip SaaS UI to vendor management dashboard

- Delete EnvironmentsPage, EnvironmentDetailPage, AppDetailPage
- Delete EnvironmentTree and DeploymentStatusBadge components
- Simplify DashboardPage to show tenant info, license status, server link
- Remove environment/app/deployment routes from router
- Remove environment section from sidebar, keep dashboard/license/platform
- Strip API hooks to tenant/license/me only
- Remove environment/app/deployment/observability types

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

ui/src/components/Layout.tsx

@@ -1,4 +1,3 @@
-import { useState } from 'react';
 import { Outlet, useNavigate } from 'react-router';
 import {
   AppShell,
@@ -8,7 +7,6 @@ import {
 import { useAuth } from '../auth/useAuth';
 import { useScopes } from '../auth/useScopes';
 import { useOrgStore } from '../auth/useOrganization';
-import { EnvironmentTree } from './EnvironmentTree';
 import cameleerLogo from '@cameleer/design-system/assets/cameleer3-logo.svg';
 
 function CameleerLogo() {
@@ -35,19 +33,6 @@ function DashboardIcon() {
   );
 }
 
-function EnvIcon() {
-  return (
-    <svg width="16" height="16" viewBox="0 0 16 16" fill="none" aria-hidden="true">
-      <path
-        d="M2 4h12M2 8h12M2 12h12"
-        stroke="currentColor"
-        strokeWidth="1.5"
-        strokeLinecap="round"
-      />
-    </svg>
-  );
-}
-
 function LicenseIcon() {
   return (
     <svg width="16" height="16" viewBox="0 0 16 16" fill="none" aria-hidden="true">
@@ -82,11 +67,8 @@ export function Layout() {
   const scopes = useScopes();
   const { username } = useOrgStore();
 
-  const [envSectionOpen, setEnvSectionOpen] = useState(true);
-  const [collapsed, setCollapsed] = useState(false);
-
   const sidebar = (
-    <Sidebar collapsed={collapsed} onCollapseToggle={() => setCollapsed((c) => !c)}>
+    <Sidebar collapsed={false} onCollapseToggle={() => {}}>
       <Sidebar.Header
         logo={<CameleerLogo />}
         title="Cameleer SaaS"
@@ -103,16 +85,6 @@ export function Layout() {
         {null}
       </Sidebar.Section>
 
-      {/* Environments — expandable tree */}
-      <Sidebar.Section
-        icon={<EnvIcon />}
-        label="Environments"
-        open={envSectionOpen}
-        onToggle={() => setEnvSectionOpen((o) => !o)}
-      >
-        <EnvironmentTree />
-      </Sidebar.Section>
-
       {/* License */}
       <Sidebar.Section
         icon={<LicenseIcon />}
@@ -136,10 +108,10 @@ export function Layout() {
       )}
 
       <Sidebar.Footer>
-        {/* Link to the observability SPA (direct port, not via Traefik prefix) */}
+        {/* Link to the server observability dashboard */}
         <Sidebar.FooterLink
           icon={<ObsIcon />}
-          label="View Dashboard"
+          label="Open Server Dashboard"
           onClick={() => window.open('/server/', '_blank', 'noopener')}
         />
       </Sidebar.Footer>