T07b: frontend feature pages — companies + contacts + settings + audit + dashboard + search

- 11 new feature pages (CompaniesList/Detail/Form, ContactsList/Detail/Form,
  SettingsProfile/Roles/Users, AuditLog, GlobalSearchResults)
- 3 page updates (Dashboard with StatCard+ActivityFeed, Settings with tree nav+Outlet,
  TopBar with SearchDropdown)
- 13 new routes in routes/index.tsx
- i18n updates (de.json + en.json) with companies/contacts/settings/audit/search keys
- 12 new test files + 2 existing test fixes (TopBar, AppShell)
- 7 shared components (DataGrid, Tabs, SearchDropdown, CsvImportDialog, StatCard,
  ActivityFeed, UnsavedChangesGuard)
- 16 new API hooks in hooks.ts
- Verification: 141 tests pass, build succeeds, tsc --noEmit clean

frontend/package.json

@@ -12,35 +12,36 @@
     "typecheck": "tsc --noEmit"
   },
   "dependencies": {
-    "react": "^18.3.1",
-    "react-dom": "^18.3.1",
-    "react-router-dom": "^6.26.0",
+    "@hookform/resolvers": "^3.9.0",
     "@tanstack/react-query": "^5.56.0",
-    "zustand": "^4.5.5",
-    "react-i18next": "^15.0.0",
+    "@tanstack/react-table": "^8.21.3",
+    "axios": "^1.7.7",
+    "clsx": "^2.1.1",
     "i18next": "^23.14.0",
     "i18next-browser-languagedetector": "^8.0.0",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
     "react-hook-form": "^7.53.0",
+    "react-i18next": "^15.0.0",
+    "react-router-dom": "^6.26.0",
     "zod": "^3.23.8",
-    "@hookform/resolvers": "^3.9.0",
-    "axios": "^1.7.7",
-    "clsx": "^2.1.1"
+    "zustand": "^4.5.5"
   },
   "devDependencies": {
+    "@testing-library/jest-dom": "^6.5.0",
+    "@testing-library/react": "^16.0.1",
+    "@testing-library/user-event": "^14.5.2",
     "@types/react": "^18.3.8",
     "@types/react-dom": "^18.3.0",
     "@vitejs/plugin-react": "^4.3.1",
+    "@vitest/coverage-v8": "^2.1.0",
+    "autoprefixer": "^10.4.20",
+    "identity-obj-proxy": "^3.0.0",
+    "jsdom": "^25.0.0",
+    "postcss": "^8.4.47",
+    "tailwindcss": "^3.4.13",
     "typescript": "^5.6.0",
     "vite": "^5.4.0",
-    "vitest": "^2.1.0",
-    "@vitest/coverage-v8": "^2.1.0",
-    "jsdom": "^25.0.0",
-    "@testing-library/react": "^16.0.1",
-    "@testing-library/jest-dom": "^6.5.0",
-    "@testing-library/user-event": "^14.5.2",
-    "tailwindcss": "^3.4.13",
-    "postcss": "^8.4.47",
-    "autoprefixer": "^10.4.20",
-    "identity-obj-proxy": "^3.0.0"
+    "vitest": "^2.1.0"
   }
 }