feat(用户): 实现用户信息获取及配置写入功能

添加获取用户信息的API接口和Pinia存储
在登录流程中增加用户信息获取和配置写入操作
新增opencode配置写入的IPC通信功能

src/renderer/stores/user.js

@@ -0,0 +1,25 @@
+import { defineStore } from 'pinia';
+import { ref, computed } from 'vue';
+
+const STORAGE_KEY = 'user_info';
+
+export const useUserStore = defineStore('user', () => {
+  const userInfo = ref(JSON.parse(localStorage.getItem(STORAGE_KEY) || 'null'));
+
+  const nickname = computed(() => userInfo.value?.nickname || '');
+  const email = computed(() => userInfo.value?.email || '');
+  const isLoggedIn = computed(() => !!userInfo.value);
+
+  function setUserInfo(info) {
+    userInfo.value = info;
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(info));
+  }
+
+  function clearUserInfo() {
+    userInfo.value = null;
+    localStorage.removeItem(STORAGE_KEY);
+    localStorage.removeItem('Authorization');
+  }
+
+  return { userInfo, nickname, email, isLoggedIn, setUserInfo, clearUserInfo };
+});