finshing architecture for project now we have all layers to build profitionl project app,components ,hooks ,lib,services,styel ,types

lib/session.ts

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+export const SESSION_KEY    = "lf_client";
+export const SESSION_COOKIE = "lf_client_id";
+
+export interface ClientSession {
+  id: string;
+  name: string;
+  email: string;
+  phone: string;
+}
+
+// ── Cookie helpers ────────────────────────────────────
+export function getCookie(name: string): string | null {
+  if (typeof document === "undefined") return null;
+  const match = document.cookie.match(new RegExp(`(^| )${name}=([^;]+)`));
+  return match ? decodeURIComponent(match[2]) : null;
+}
+
+export function setCookie(name: string, value: string, days = 30) {
+  const exp = new Date(Date.now() + days * 864e5).toUTCString();
+  document.cookie = `${name}=${encodeURIComponent(value)}; expires=${exp}; path=/; SameSite=Lax`;
+}
+
+export function deleteCookie(name: string) {
+  document.cookie = `${name}=; expires=Thu, 01 Jan 1970 00:00:00 UTC; path=/`;
+}
+
+// ── Session read / write ──────────────────────────────
+export function loadSession(): ClientSession | null {
+  try {
+    const raw = typeof localStorage !== "undefined"
+      ? localStorage.getItem(SESSION_KEY)
+      : null;
+    if (raw) return JSON.parse(raw) as ClientSession;
+  } catch { /* ignore parse errors */ }
+
+  const id = getCookie(SESSION_COOKIE);
+  if (id) return { id, name: "", email: "", phone: "" };
+  return null;
+}
+
+export function saveSession(s: ClientSession) {
+  if (typeof localStorage !== "undefined") {
+    localStorage.setItem(SESSION_KEY, JSON.stringify(s));
+  }
+  setCookie(SESSION_COOKIE, s.id);
+}
+
+export function clearSession() {
+  if (typeof localStorage !== "undefined") {
+    localStorage.removeItem(SESSION_KEY);
+  }
+  deleteCookie(SESSION_COOKIE);
+}