feat: add local auth billing and usage management

lib/server/auth/jwt.ts

@@ -1,7 +1,7 @@
 import { createPublicKey, createVerify } from "node:crypto";
 import type { JsonWebKey as CryptoJsonWebKey, KeyObject } from "node:crypto";
 import { getAuthRuntimeConfig, type AuthRuntimeConfig } from "@/lib/auth/config";
-import type { AuthSession, AuthUser } from "@/lib/auth/session";
+import type { AuthMode, AuthSession, AuthUser } from "@/lib/auth/session";
 
 export type AuthTokenClaims = {
   iss?: string;
@@ -76,7 +76,7 @@ export function createSessionFromClaims(
   claims: AuthTokenClaims,
   config: AuthRuntimeConfig,
   tokenResponseExpiresIn?: number,
-  token?: { accessToken?: string; tokenType?: string }
+  token?: { accessToken?: string; tokenType?: string; authMode?: AuthMode }
 ): AuthSession {
   const now = Math.floor(Date.now() / 1000);
   const jwtExpiry = numberClaim(claims.exp);
@@ -84,6 +84,7 @@ export function createSessionFromClaims(
   const expiresAt = Math.min(jwtExpiry || responseExpiry || now, responseExpiry || jwtExpiry || now);
   return {
     version: 1,
+    authMode: token?.authMode === "admin" ? "admin" : "user",
     user: userFromClaims(claims, config),
     issuedAt: now,
     expiresAt,