feat(client): vendor digital employee source

qimingclaw/crates/agent-electron-client/embedded/sgrobot-digital/src/lib/auth.ts

@@ -0,0 +1,42 @@
+const TOKEN_KEY = 'zeroclaw_token';
+
+/**
+ * Retrieve the stored authentication token.
+ */
+export function getToken(): string | null {
+  try {
+    return localStorage.getItem(TOKEN_KEY);
+  } catch {
+    return null;
+  }
+}
+
+/**
+ * Store an authentication token.
+ */
+export function setToken(token: string): void {
+  try {
+    localStorage.setItem(TOKEN_KEY, token);
+  } catch {
+    // localStorage may be unavailable (e.g. in some private browsing modes)
+  }
+}
+
+/**
+ * Remove the stored authentication token.
+ */
+export function clearToken(): void {
+  try {
+    localStorage.removeItem(TOKEN_KEY);
+  } catch {
+    // Ignore
+  }
+}
+
+/**
+ * Returns true if a token is currently stored.
+ */
+export function isAuthenticated(): boolean {
+  const token = getToken();
+  return token !== null && token.length > 0;
+}