refactor: drop skill file, rework client

utils/login.ts

@@ -0,0 +1,51 @@
+import fs from "node:fs";
+import { configFilePath, initDataDir } from "./data.ts";
+
+// Re-export for backward compatibility
+export { initDataDir };
+
+export interface LoginConfig {
+  serverUrl: string;
+  email: string;
+  username: string;
+  domain?: string;
+}
+
+let inMemoryPassword: string | null = null;
+
+export function setPassword(password: string): void {
+  inMemoryPassword = password;
+}
+
+export function getPassword(): string | null {
+  return inMemoryPassword;
+}
+
+export function hasPassword(): boolean {
+  return inMemoryPassword !== null;
+}
+
+export function clearPassword(): void {
+  inMemoryPassword = null;
+}
+
+export function loadConfig(): LoginConfig {
+  const filePath = configFilePath();
+  if (!fs.existsSync(filePath)) {
+    throw new Error("Not logged in. Use the login tool first.");
+  }
+  return JSON.parse(fs.readFileSync(filePath, "utf-8")) as LoginConfig;
+}
+
+export function saveConfig(config: LoginConfig): void {
+  const filePath = configFilePath();
+  fs.writeFileSync(filePath, JSON.stringify(config, null, 2), "utf-8");
+}
+
+export function clearConfig(): void {
+  const filePath = configFilePath();
+  if (fs.existsSync(filePath)) {
+    fs.unlinkSync(filePath);
+  }
+  clearPassword();
+}