feat: complete Epic 0 — foundation migration & infrastructure setup

Stories 0.2-0.5: rename folders→declarations (backend+frontend), configure
Redis for cache/queue/sessions, add foundation database migrations
(permissions, archived_at), replace DeclarationStatus enum with architecture
lifecycle values, create DeclarationObserver for status transition validation
and auto-archive, fix controller status transitions to respect observer rules.

93 tests pass (240 assertions).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

resources/js/components/AppSidebar.vue

@@ -1,6 +1,14 @@
 <script setup lang="ts">
 import { Link, usePage } from '@inertiajs/vue3';
-import { BookOpen, Briefcase, Building2, Folder, HelpCircle, LayoutGrid, Users } from 'lucide-vue-next';
+import {
+    BookOpen,
+    Briefcase,
+    Building2,
+    FileStack,
+    HelpCircle,
+    LayoutGrid,
+    Users,
+} from 'lucide-vue-next';
 import { computed } from 'vue';
 import NavFooter from '@/components/NavFooter.vue';
 import NavMain from '@/components/NavMain.vue';
@@ -14,9 +22,9 @@ import {
     SidebarMenuButton,
     SidebarMenuItem,
 } from '@/components/ui/sidebar';
+import { dashboard } from '@/routes';
 import type { NavItem } from '@/types';
 import AppLogo from './AppLogo.vue';
-import { dashboard } from '@/routes';
 import WorkspaceSwitcher from './WorkspaceSwitcher.vue';
 
 const page = usePage();
@@ -36,9 +44,9 @@ const mainNavItems = computed<NavItem[]>(() => {
                 icon: Briefcase,
             },
             {
-                title: 'Dossiers',
-                href: '/folders',
-                icon: Folder,
+                title: 'Déclarations',
+                href: '/declarations',
+                icon: FileStack,
             },
         );
     }
@@ -90,9 +98,16 @@ const footerNavItems: NavItem[] = [
         <SidebarContent>
             <NavMain :items="mainNavItems" />
             <template
-                v-if="['admin', 'superadmin'].includes(String($page.props.auth.user?.group ?? ''))"
+                v-if="
+                    ['admin', 'superadmin'].includes(
+                        String($page.props.auth.user?.group ?? ''),
+                    )
+                "
             >
-                <NavMain :items="administrationNavItems" label="Administration" />
+                <NavMain
+                    :items="administrationNavItems"
+                    label="Administration"
+                />
             </template>
         </SidebarContent>