feat: 自动生成JWT_SECRET和ADMIN_PASSWORD并持久化到secrets.json

source_clean/src/config/startup-validator.ts

@@ -42,14 +42,7 @@ export function validateConfig(): ValidationError[] {
   }
 
   // ─── Cookie Encryption ───
-  if (!process.env.COOKIE_ENCRYPTION_KEY) {
-    errors.push({
-      key: 'COOKIE_ENCRYPTION_KEY',
-      message: '未设置网盘 Cookie 加密密钥！Cookie 将以明文存储。生产环境强烈建议设置。\n' +
-        '生成: openssl rand -hex 32',
-      severity: 'warn',
-    });
-  }
+  // Key is auto-generated and persisted to encryption.key if COOKIE_ENCRYPTION_KEY is not set
 
   // ─── Port conflict check (best-effort) ───
   if (config.port < 1024 && (process as any).getuid?.() !== 0) {