Phase 1b: React Query + Vitest on client

- @tanstack/react-query v5 with QueryClientProvider at app root
- client/src/api/queries.ts: query-key factory, hooks for tickets, ticket, audit,
  comments, users, CTI tree + cascade, plus full mutation set
  (create/update/delete ticket, add/delete comment, CTI CRUD, user CRUD)
- All page-level useEffect + useState fetching replaced:
  Dashboard, MyTickets, TicketDetail, NewTicket, admin/CTI, admin/Users
- Dashboard preserves 300ms debounced search via separate debouncedSearch state
- CTISelect cascades via useCategories / useTypes(categoryId) / useItems(typeId);
  dependent hooks disabled until parent selected
- vitest + @testing-library/react + jsdom; 6 client tests cover SeverityBadge + StatusBadge

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

client/package.json

@@ -13,8 +13,21 @@
   },
   "dependencies": {
     "@hookform/resolvers": "^3.9.1",
+    "@radix-ui/react-alert-dialog": "^1.1.15",
+    "@radix-ui/react-avatar": "^1.1.11",
+    "@radix-ui/react-dialog": "^1.1.15",
+    "@radix-ui/react-dropdown-menu": "^2.1.16",
+    "@radix-ui/react-label": "^2.1.8",
+    "@radix-ui/react-popover": "^1.1.15",
+    "@radix-ui/react-select": "^2.2.6",
+    "@radix-ui/react-separator": "^1.1.8",
+    "@radix-ui/react-slot": "^1.2.4",
+    "@radix-ui/react-tabs": "^1.1.13",
+    "@radix-ui/react-tooltip": "^1.2.8",
     "@tanstack/react-query": "^5.62.0",
     "axios": "^1.7.9",
+    "class-variance-authority": "^0.7.1",
+    "clsx": "^2.1.1",
     "cmdk": "^1.0.4",
     "date-fns": "^3.6.0",
     "lucide-react": "^0.468.0",
@@ -25,6 +38,8 @@
     "react-router-dom": "^6.28.0",
     "remark-gfm": "^4.0.0",
     "sonner": "^1.7.1",
+    "tailwind-merge": "^3.5.0",
+    "tailwindcss-animate": "^1.0.7",
     "zod": "^3.23.8"
   },
   "devDependencies": {
@@ -32,6 +47,7 @@
     "@testing-library/jest-dom": "^6.6.3",
     "@testing-library/react": "^16.1.0",
     "@testing-library/user-event": "^14.5.2",
+    "@types/node": "^25.6.0",
     "@types/react": "^18.3.12",
     "@types/react-dom": "^18.3.1",
     "@vitejs/plugin-react": "^4.3.4",