chore(brand): 默认后端指向 opc.pinesound.cn + 更新品牌标识资源

Co-Authored-By: Claude <noreply@anthropic.com>

console/src/layouts/Header.tsx

@@ -364,7 +364,7 @@ export default function Header() {
           */}
           <Slot name="header.logo" kind="replace">
             <img
-              src="/logo.png"
+              src="/logo-light.svg"
               alt="PineAgents"
               className={styles.logoImg}
             />

src/pineagents/constant.py

@@ -164,10 +164,10 @@ SECRET_DIR = (
 # Env key for overriding the OS keychain account used for the master key.
 KEYRING_ACCOUNT_ENV = "QWENPAW_KEYRING_ACCOUNT"
 
-# 演示 FastAPI 服务地址：登录/演示接口由 pineagents-demo 提供，本项目后端转发过去。
+#  后端服务地址
 DEMO_API_BASE_URL = EnvVarLoader.get_str(
     "PINEAGENTS_DEMO_BASE_URL",
-    "http://192.168.1.9:8090",
+    "https://opc.pinesound.cn",
 )
 
 PROJECT_NAME = BRAND.project_name