Add comprehensive testing suite and fix QC issues

- Add 115+ unit, component, and E2E tests
- Add Vitest configuration with coverage thresholds
- Add validation schema tests (validations.test.ts)
- Add sanitizer utility tests (sanitizer.test.ts)
- Add WhatsApp service tests (whatsapp.test.ts)
- Add component tests for UnifiedTypography and UnifiedSurface
- Add E2E tests for admin auth and public pages
- Add testing documentation (docs/TESTING.md)
- Add sanitizer and WhatsApp utilities
- Add centralized validation schemas
- Refactor state management (admin/public separation)
- Fix security issues (OTP via POST, session password validation)
- Update AGENTS.md with testing guidelines

Test Coverage: 50%+ target achieved
All tests passing: 115/115

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

src/state/admin/adminNavState.ts

@@ -0,0 +1,47 @@
+/**
+ * Admin Navigation State
+ * 
+ * State management untuk navigasi admin dashboard
+ * Menggunakan Valtio untuk reactive state
+ */
+
+import { proxy } from "valtio";
+import type { MenuItem } from "../../../types/menu-item";
+
+export const adminNavState = proxy<{
+  hover: boolean;
+  item: MenuItem[] | null;
+  isSearch: boolean;
+  module: string | null;
+  mobileOpen: boolean;
+  clear: () => void;
+  setModule: (module: string | null) => void;
+  toggleMobile: () => void;
+}>({
+  hover: false,
+  item: null,
+  isSearch: false,
+  module: null,
+  mobileOpen: false,
+  
+  clear() {
+    adminNavState.hover = false;
+    adminNavState.item = null;
+    adminNavState.isSearch = false;
+  },
+  
+  setModule(module: string | null) {
+    adminNavState.module = module;
+  },
+  
+  toggleMobile() {
+    adminNavState.mobileOpen = !adminNavState.mobileOpen;
+  },
+});
+
+// Helper hook untuk React components
+export const useAdminNav = () => {
+  return adminNavState;
+};
+
+export default adminNavState;