Add frontend handling for users without a company

Make setSelectedCompany null-safe and clear stale localStorage.
Conditionally initialize company store state in bootstrap. Add
router guard to redirect no-company users to NoCompanyView while
allowing super admins through. Hide sidebar when no company.

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

resources/scripts/router/index.js

@@ -1,6 +1,7 @@
 import { createRouter, createWebHistory } from 'vue-router'
 import { useUserStore } from '@/scripts/admin/stores/user'
 import { useGlobalStore } from '@/scripts/admin/stores/global'
+import { useCompanyStore } from '@/scripts/admin/stores/company'
 
 //admin routes
 import AdminRoutes from '@/scripts/admin/admin-router'
@@ -20,9 +21,16 @@ const router = createRouter({
 router.beforeEach((to) => {
   const userStore = useUserStore()
   const globalStore = useGlobalStore()
+  const companyStore = useCompanyStore()
   let ability = to.meta.ability
   const { isAppLoaded } = globalStore
 
+  if (isAppLoaded && to.meta.requiresAuth && to.name !== 'no.company') {
+    if (!companyStore.selectedCompany && !(to.meta.isSuperAdmin && userStore.currentUser?.is_super_admin)) {
+      return { name: 'no.company' }
+    }
+  }
+
   if (ability && isAppLoaded && to.meta.requiresAuth) {
     if (!userStore.hasAbilities(ability)) {
       return { name: 'account.settings' }