fix: persist gateway token for local CLI auth

src/config/config.ts

@@ -351,6 +351,8 @@ export type GatewayAuthMode = "token" | "password";
 export type GatewayAuthConfig = {
   /** Authentication mode for Gateway connections. Defaults to token when set. */
   mode?: GatewayAuthMode;
+  /** Shared token for token mode (stored locally for CLI auth). */
+  token?: string;
   /** Shared password for password mode (consider env instead). */
   password?: string;
   /** Allow Tailscale identity headers when serve mode is enabled. */
@@ -1097,6 +1099,7 @@ const ClawdisSchema = z.object({
       auth: z
         .object({
           mode: z.union([z.literal("token"), z.literal("password")]).optional(),
+          token: z.string().optional(),
           password: z.string().optional(),
           allowTailscale: z.boolean().optional(),
         })