feat: move Apps from admin to main tab bar with container config

- Apps tab visible to OPERATOR+ (hidden for VIEWER), scoped by
  sidebar app selection and environment filter
- List view: DataTable with name, environment, updated, created columns
- Detail view: deployments across all envs, version upload with
  per-env deploy target, container config form (resources, ports,
  custom env vars) with explicit Save
- Memory reserve field disabled for non-production environments
  with info hint
- Admin sidebar sorted alphabetically, Applications entry removed
- Old admin AppsPage deleted

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

ui/src/hooks/useScope.ts

@@ -2,9 +2,9 @@
 import { useParams, useNavigate, useLocation } from 'react-router';
 import { useCallback } from 'react';
 
-export type TabKey = 'exchanges' | 'dashboard' | 'runtime' | 'logs' | 'config';
+export type TabKey = 'exchanges' | 'dashboard' | 'runtime' | 'logs' | 'config' | 'apps';
 
-const VALID_TABS = new Set<TabKey>(['exchanges', 'dashboard', 'runtime', 'logs', 'config']);
+const VALID_TABS = new Set<TabKey>(['exchanges', 'dashboard', 'runtime', 'logs', 'config', 'apps']);
 
 export interface Scope {
   tab: TabKey;