refactor(http): 重构登录和请求基础URL处理逻辑

移除loginAction的sparkBaseUrl参数，改为通过请求拦截器统一处理
优化设备地址显示逻辑，优先使用非IPv6地址

src/renderer/components/LoginDialog.vue

@@ -16,7 +16,7 @@
               <el-option
                 v-for="device in sparkStore.devices"
                 :key="device.name"
-                :label="`${device.name} (${device.addresses?.[0]}:${device.port})`"
+                :label="`${device.name} (${device.addresses?.find((a) => !a.includes(':')) || device.referer?.address}:${device.port})`"
                 :value="device.name"
               />
             </el-select>
@@ -119,7 +119,7 @@ async function handleLogin() {
       console.log('[Login] spark device:', device);
       console.log('[Login] target url:', url);
 
-      await loginAction({ email: form.value.username, password: form.value.password }, url);
+      await loginAction({ email: form.value.username, password: form.value.password });
       ElMessage.success(`登录成功 | ${url ?? '未选择设备'}`);
       emit('login-success', { username: form.value.username, device });
       visible.value = false;