feat: complete login and user management flow

src/api/session.ts

@@ -0,0 +1,42 @@
+export type Portal = 'admin' | 'client';
+
+export type SessionUser = {
+  id: string;
+  tenantId?: string | null;
+  tenantName?: string | null;
+  username: string;
+  email?: string | null;
+  phone?: string | null;
+  displayName: string;
+  roles: string[];
+};
+
+export type LoginSession = {
+  accessToken: string;
+  tokenType: string;
+  portal: Portal;
+  user: SessionUser;
+};
+
+const sessionKey = 'cmpp-auth-session';
+
+export function readSession(): LoginSession | null {
+  try {
+    const raw = window.localStorage.getItem(sessionKey);
+    return raw ? JSON.parse(raw) as LoginSession : null;
+  } catch {
+    return null;
+  }
+}
+
+export function writeSession(session: LoginSession) {
+  window.localStorage.setItem(sessionKey, JSON.stringify(session));
+}
+
+export function clearSession() {
+  window.localStorage.removeItem(sessionKey);
+}
+
+export function getSessionTenantId() {
+  return readSession()?.user.tenantId ?? undefined;
+}