security: migrate auth tokens to httpOnly cookies (hybrid bearer token approach)

Backend:
- CookieBearerToken middleware reads httpOnly cookie and injects Authorization
  header before Sanctum validates (prepended to API middleware group)
- SetAuthCookie trait provides cookie creation/expiry helpers with per-app
  cookie names (crewli_admin_token, crewli_app_token, crewli_portal_token)
- LoginController sets token via Set-Cookie, removes it from JSON body
- LogoutController expires the auth cookie on logout
- AuthRefreshController (POST /auth/refresh) rotates tokens with new cookie
- InvitationController accept also sets token via cookie, not JSON body
- All cookies: httpOnly, SameSite=Strict, Secure (in production)

Frontend (all three SPAs):
- Removed all localStorage token storage (apps/app, apps/portal)
- Removed all JS-readable cookie token storage (apps/admin)
- Removed Authorization: Bearer header interceptors from axios
- Auth stores now rely on GET /auth/me to validate httpOnly cookie
- Admin app: new Pinia auth store replaces useCookie-based auth pattern
- withCredentials: true ensures browser sends cookies automatically

Fixes security findings A13-1 (localStorage tokens) and A13-2 (admin
cookie flags). Tokens are now invisible to JavaScript.

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

apps/admin/src/composables/useOrganisationContext.ts

@@ -1,4 +1,4 @@
-import { useCookie } from '@core/composable/useCookie'
+import { useAuthStore } from '@/stores/useAuthStore'
 import { computed } from 'vue'
 
 export interface AuthOrganisationSummary {
@@ -17,12 +17,12 @@ export interface AuthUserCookie {
 }
 
 /**
- * First organisation from the session cookie (set at login). Super-admins still need an organisation context for nested event routes.
+ * First organisation from the auth store (set at login). Super-admins still need an organisation context for nested event routes.
  */
 export function useCurrentOrganisationId() {
-  const userData = useCookie<AuthUserCookie | null>('userData')
+  const authStore = useAuthStore()
 
-  const organisationId = computed(() => userData.value?.organisations?.[0]?.id ?? null)
+  const organisationId = computed(() => authStore.user?.organisations?.[0]?.id ?? null)
 
   return { organisationId }
 }